./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_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/safe027_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/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe027_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 10:42:01,463 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:42:01,526 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:42:01,529 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:42:01,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:42:01,549 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:42:01,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:42:01,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:42:01,551 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:42:01,554 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:42:01,554 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:42:01,554 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:42:01,555 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:42:01,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:42:01,557 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:42:01,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:42:01,557 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:42:01,557 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:42:01,557 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:42:01,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:42:01,558 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:42:01,558 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:42:01,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:42:01,559 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:42:01,559 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:42:01,559 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:42:01,559 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:42:01,559 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:42:01,560 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:42:01,560 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:42:01,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:42:01,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:42:01,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:42:01,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:42:01,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:42:01,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:42:01,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:42:01,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:42:01,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:42:01,563 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:42:01,564 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:42:01,564 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:42:01,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:42:01,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:42:01,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:42:01,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:42:01,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:42:01,823 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:42:01,823 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:42:01,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 10:42:02,916 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:42:03,147 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:42:03,147 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 10:42:03,158 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ae28068/57d9f4ddba104020b6722a549a6b182c/FLAG742db7a76 [2024-05-12 10:42:03,183 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ae28068/57d9f4ddba104020b6722a549a6b182c [2024-05-12 10:42:03,185 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:42:03,186 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:42:03,186 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-05-12 10:42:03,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:42:03,294 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:42:03,295 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:42:03,295 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:42:03,298 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:42:03,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:42:03" (1/2) ... [2024-05-12 10:42:03,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e995d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:03, skipping insertion in model container [2024-05-12 10:42:03,300 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:42:03" (1/2) ... [2024-05-12 10:42:03,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e4538d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:42:03, skipping insertion in model container [2024-05-12 10:42:03,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:42:03" (2/2) ... [2024-05-12 10:42:03,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e995d85 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03, skipping insertion in model container [2024-05-12 10:42:03,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:42:03" (2/2) ... [2024-05-12 10:42:03,302 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:42:03,352 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:42:03,353 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! 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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-05-12 10:42:03,354 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (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 <= __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 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-05-12 10:42:03,354 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! 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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-05-12 10:42:03,354 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (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 <= __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 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-05-12 10:42:03,354 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:42:03,354 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-05-12 10:42:03,393 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:42:03,540 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/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-05-12 10:42:03,669 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:42:03,679 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:42:03,710 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/safe027_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 10:42:03,860 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:42:03,899 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:42:03,899 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03 WrapperNode [2024-05-12 10:42:03,900 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:42:03,901 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:42:03,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:42:03,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:42:03,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:03,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:03,955 INFO L138 Inliner]: procedures = 177, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2024-05-12 10:42:03,955 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:42:03,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:42:03,956 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:42:03,956 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:42:03,982 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:03,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:03,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:04,028 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 10:42:04,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:04,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:04,035 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:04,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:04,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:04,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:04,043 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:42:04,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:42:04,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:42:04,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:42:04,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (1/1) ... [2024-05-12 10:42:04,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:42:04,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:42:04,087 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 10:42:04,089 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 10:42:04,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:42:04,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:42:04,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:42:04,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:42:04,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 10:42:04,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:42:04,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:42:04,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:42:04,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:42:04,122 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:42:04,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:42:04,123 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:42:04,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:42:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:42:04,125 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:42:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-05-12 10:42:04,125 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-05-12 10:42:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:42:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:42:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:42:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:42:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 10:42:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:42:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:42:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:42:04,127 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 10:42:04,252 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:42:04,253 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:42:04,510 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:42:04,510 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:42:04,589 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:42:04,589 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:42:04,590 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:42:04 BoogieIcfgContainer [2024-05-12 10:42:04,590 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:42:04,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:42:04,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:42:04,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:42:04,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:42:03" (1/4) ... [2024-05-12 10:42:04,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe7c49a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:42:04, skipping insertion in model container [2024-05-12 10:42:04,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:42:03" (2/4) ... [2024-05-12 10:42:04,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe7c49a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:42:04, skipping insertion in model container [2024-05-12 10:42:04,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:42:03" (3/4) ... [2024-05-12 10:42:04,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe7c49a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:42:04, skipping insertion in model container [2024-05-12 10:42:04,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:42:04" (4/4) ... [2024-05-12 10:42:04,603 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 10:42:04,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:42:04,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 10:42:04,616 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:42:04,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:42:04,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 55 transitions, 126 flow [2024-05-12 10:42:04,733 INFO L124 PetriNetUnfolderBase]: 1/51 cut-off events. [2024-05-12 10:42:04,734 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:42:04,737 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 84 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 10:42:04,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 55 transitions, 126 flow [2024-05-12 10:42:04,741 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 48 transitions, 108 flow [2024-05-12 10:42:04,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:42:04,760 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;@244c1e3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:42:04,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 10:42:04,765 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:42:04,765 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:42:04,765 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:42:04,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:04,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:42:04,766 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 10:42:04,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:04,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1395595871, now seen corresponding path program 1 times [2024-05-12 10:42:04,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:04,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348745654] [2024-05-12 10:42:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:04,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:05,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348745654] [2024-05-12 10:42:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348745654] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:05,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:05,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:42:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765773074] [2024-05-12 10:42:05,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:05,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:42:05,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:42:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:42:05,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-05-12 10:42:05,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:05,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:05,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-05-12 10:42:05,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:05,996 INFO L124 PetriNetUnfolderBase]: 2263/3308 cut-off events. [2024-05-12 10:42:05,996 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-05-12 10:42:06,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6604 conditions, 3308 events. 2263/3308 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18903 event pairs, 1397 based on Foata normal form. 1/3200 useless extension candidates. Maximal degree in co-relation 6588. Up to 3171 conditions per place. [2024-05-12 10:42:06,024 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 41 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-05-12 10:42:06,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 241 flow [2024-05-12 10:42:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:42:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:42:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-05-12 10:42:06,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7212121212121212 [2024-05-12 10:42:06,036 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 108 flow. Second operand 3 states and 119 transitions. [2024-05-12 10:42:06,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 241 flow [2024-05-12 10:42:06,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:06,044 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 143 flow [2024-05-12 10:42:06,046 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 10:42:06,049 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2024-05-12 10:42:06,049 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 143 flow [2024-05-12 10:42:06,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:06,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:06,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:06,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:42:06,050 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 10:42:06,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1036277147, now seen corresponding path program 1 times [2024-05-12 10:42:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555482189] [2024-05-12 10:42:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:06,437 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 10:42:06,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:06,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555482189] [2024-05-12 10:42:06,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555482189] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:06,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:06,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:06,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336089213] [2024-05-12 10:42:06,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:06,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:06,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:06,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:06,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:06,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 143 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 10:42:06,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:06,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:06,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:07,215 INFO L124 PetriNetUnfolderBase]: 3891/5916 cut-off events. [2024-05-12 10:42:07,216 INFO L125 PetriNetUnfolderBase]: For 1188/1380 co-relation queries the response was YES. [2024-05-12 10:42:07,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13248 conditions, 5916 events. 3891/5916 cut-off events. For 1188/1380 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 36457 event pairs, 2275 based on Foata normal form. 35/5836 useless extension candidates. Maximal degree in co-relation 13233. Up to 5093 conditions per place. [2024-05-12 10:42:07,259 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 59 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2024-05-12 10:42:07,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 82 transitions, 351 flow [2024-05-12 10:42:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:42:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:42:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-05-12 10:42:07,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-05-12 10:42:07,271 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 143 flow. Second operand 4 states and 154 transitions. [2024-05-12 10:42:07,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 82 transitions, 351 flow [2024-05-12 10:42:07,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:42:07,274 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 170 flow [2024-05-12 10:42:07,274 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=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2024-05-12 10:42:07,275 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2024-05-12 10:42:07,275 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 170 flow [2024-05-12 10:42:07,275 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 10:42:07,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:07,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:07,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:42:07,276 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 10:42:07,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:07,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1099371517, now seen corresponding path program 1 times [2024-05-12 10:42:07,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:07,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310264376] [2024-05-12 10:42:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:07,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:07,804 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 10:42:07,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:07,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310264376] [2024-05-12 10:42:07,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310264376] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:07,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:07,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:42:07,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333936489] [2024-05-12 10:42:07,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:07,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:42:07,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:42:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:42:07,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:07,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:07,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:07,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:07,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:08,448 INFO L124 PetriNetUnfolderBase]: 4154/6321 cut-off events. [2024-05-12 10:42:08,449 INFO L125 PetriNetUnfolderBase]: For 2644/2692 co-relation queries the response was YES. [2024-05-12 10:42:08,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15098 conditions, 6321 events. 4154/6321 cut-off events. For 2644/2692 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 38628 event pairs, 1972 based on Foata normal form. 3/6296 useless extension candidates. Maximal degree in co-relation 15081. Up to 5696 conditions per place. [2024-05-12 10:42:08,482 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 57 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-05-12 10:42:08,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 382 flow [2024-05-12 10:42:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:42:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:42:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-05-12 10:42:08,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6681818181818182 [2024-05-12 10:42:08,485 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 170 flow. Second operand 4 states and 147 transitions. [2024-05-12 10:42:08,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 382 flow [2024-05-12 10:42:08,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:08,488 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 230 flow [2024-05-12 10:42:08,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-05-12 10:42:08,489 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2024-05-12 10:42:08,489 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 230 flow [2024-05-12 10:42:08,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:08,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:08,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:42:08,490 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 10:42:08,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:08,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1312707496, now seen corresponding path program 1 times [2024-05-12 10:42:08,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:08,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897938294] [2024-05-12 10:42:08,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:08,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:08,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:08,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897938294] [2024-05-12 10:42:08,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897938294] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:08,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:08,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:42:08,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459870552] [2024-05-12 10:42:08,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:08,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:08,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:08,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:08,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:08,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:08,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 10:42:08,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:08,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:08,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:09,498 INFO L124 PetriNetUnfolderBase]: 4139/6376 cut-off events. [2024-05-12 10:42:09,499 INFO L125 PetriNetUnfolderBase]: For 4755/4807 co-relation queries the response was YES. [2024-05-12 10:42:09,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16725 conditions, 6376 events. 4139/6376 cut-off events. For 4755/4807 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39364 event pairs, 2254 based on Foata normal form. 6/6292 useless extension candidates. Maximal degree in co-relation 16706. Up to 5637 conditions per place. [2024-05-12 10:42:09,526 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 67 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2024-05-12 10:42:09,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 95 transitions, 480 flow [2024-05-12 10:42:09,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-05-12 10:42:09,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581818181818182 [2024-05-12 10:42:09,528 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 230 flow. Second operand 5 states and 181 transitions. [2024-05-12 10:42:09,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 95 transitions, 480 flow [2024-05-12 10:42:09,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 476 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 10:42:09,531 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 282 flow [2024-05-12 10:42:09,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-05-12 10:42:09,532 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2024-05-12 10:42:09,532 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 282 flow [2024-05-12 10:42:09,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 10:42:09,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:09,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:09,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:42:09,533 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 10:42:09,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash -44146478, now seen corresponding path program 1 times [2024-05-12 10:42:09,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968168595] [2024-05-12 10:42:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:09,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:09,953 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 10:42:09,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:09,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968168595] [2024-05-12 10:42:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968168595] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:09,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:09,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:09,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610434002] [2024-05-12 10:42:09,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:09,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:09,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:09,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:09,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:09,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:09,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:09,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:09,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:09,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:10,632 INFO L124 PetriNetUnfolderBase]: 5356/8032 cut-off events. [2024-05-12 10:42:10,632 INFO L125 PetriNetUnfolderBase]: For 8915/8965 co-relation queries the response was YES. [2024-05-12 10:42:10,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22731 conditions, 8032 events. 5356/8032 cut-off events. For 8915/8965 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 48970 event pairs, 1992 based on Foata normal form. 16/8009 useless extension candidates. Maximal degree in co-relation 22709. Up to 7111 conditions per place. [2024-05-12 10:42:10,674 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 63 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-05-12 10:42:10,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 544 flow [2024-05-12 10:42:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:42:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:42:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-05-12 10:42:10,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-05-12 10:42:10,676 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 282 flow. Second operand 4 states and 150 transitions. [2024-05-12 10:42:10,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 544 flow [2024-05-12 10:42:10,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 95 transitions, 514 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:10,686 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 350 flow [2024-05-12 10:42:10,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-05-12 10:42:10,687 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2024-05-12 10:42:10,687 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 350 flow [2024-05-12 10:42:10,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:10,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:10,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:10,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:42:10,688 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 10:42:10,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash -3808658, now seen corresponding path program 2 times [2024-05-12 10:42:10,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:10,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22454765] [2024-05-12 10:42:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:10,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:11,075 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 10:42:11,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:11,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22454765] [2024-05-12 10:42:11,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22454765] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:11,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:11,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791337476] [2024-05-12 10:42:11,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:11,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:11,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:11,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:11,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 350 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:11,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:11,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:11,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:11,758 INFO L124 PetriNetUnfolderBase]: 5347/8147 cut-off events. [2024-05-12 10:42:11,758 INFO L125 PetriNetUnfolderBase]: For 13886/14068 co-relation queries the response was YES. [2024-05-12 10:42:11,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25636 conditions, 8147 events. 5347/8147 cut-off events. For 13886/14068 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 50792 event pairs, 2403 based on Foata normal form. 18/8104 useless extension candidates. Maximal degree in co-relation 25613. Up to 7179 conditions per place. [2024-05-12 10:42:11,798 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 78 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-05-12 10:42:11,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 716 flow [2024-05-12 10:42:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-05-12 10:42:11,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581818181818182 [2024-05-12 10:42:11,800 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 350 flow. Second operand 5 states and 181 transitions. [2024-05-12 10:42:11,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 716 flow [2024-05-12 10:42:11,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 650 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:11,817 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 465 flow [2024-05-12 10:42:11,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=465, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-05-12 10:42:11,820 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2024-05-12 10:42:11,820 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 465 flow [2024-05-12 10:42:11,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:11,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:11,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:11,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:42:11,821 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:42:11,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:11,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1755140625, now seen corresponding path program 1 times [2024-05-12 10:42:11,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:11,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948511158] [2024-05-12 10:42:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:11,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:12,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:12,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948511158] [2024-05-12 10:42:12,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948511158] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:12,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:12,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:12,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194067387] [2024-05-12 10:42:12,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:12,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:12,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:12,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:12,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:12,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:12,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:12,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:12,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:13,123 INFO L124 PetriNetUnfolderBase]: 7424/11366 cut-off events. [2024-05-12 10:42:13,124 INFO L125 PetriNetUnfolderBase]: For 27214/27427 co-relation queries the response was YES. [2024-05-12 10:42:13,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37760 conditions, 11366 events. 7424/11366 cut-off events. For 27214/27427 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 74651 event pairs, 1987 based on Foata normal form. 104/11306 useless extension candidates. Maximal degree in co-relation 37734. Up to 7434 conditions per place. [2024-05-12 10:42:13,202 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 99 selfloop transitions, 34 changer transitions 0/148 dead transitions. [2024-05-12 10:42:13,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 148 transitions, 1003 flow [2024-05-12 10:42:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-05-12 10:42:13,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.703030303030303 [2024-05-12 10:42:13,203 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 465 flow. Second operand 6 states and 232 transitions. [2024-05-12 10:42:13,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 148 transitions, 1003 flow [2024-05-12 10:42:13,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 148 transitions, 971 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-05-12 10:42:13,221 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 612 flow [2024-05-12 10:42:13,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=612, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2024-05-12 10:42:13,222 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 22 predicate places. [2024-05-12 10:42:13,222 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 612 flow [2024-05-12 10:42:13,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:13,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:13,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:13,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:42:13,223 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 10:42:13,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:13,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1766331345, now seen corresponding path program 2 times [2024-05-12 10:42:13,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:13,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451097617] [2024-05-12 10:42:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:13,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:13,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451097617] [2024-05-12 10:42:13,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451097617] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:13,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:13,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:13,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045901937] [2024-05-12 10:42:13,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:13,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:13,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:13,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:13,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 612 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:13,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:13,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:13,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:14,441 INFO L124 PetriNetUnfolderBase]: 7154/10698 cut-off events. [2024-05-12 10:42:14,441 INFO L125 PetriNetUnfolderBase]: For 35235/35468 co-relation queries the response was YES. [2024-05-12 10:42:14,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39129 conditions, 10698 events. 7154/10698 cut-off events. For 35235/35468 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 68269 event pairs, 2009 based on Foata normal form. 122/10730 useless extension candidates. Maximal degree in co-relation 39099. Up to 8506 conditions per place. [2024-05-12 10:42:14,510 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 87 selfloop transitions, 29 changer transitions 0/131 dead transitions. [2024-05-12 10:42:14,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 986 flow [2024-05-12 10:42:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-05-12 10:42:14,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6872727272727273 [2024-05-12 10:42:14,511 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 612 flow. Second operand 5 states and 189 transitions. [2024-05-12 10:42:14,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 986 flow [2024-05-12 10:42:14,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 131 transitions, 934 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:14,569 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 664 flow [2024-05-12 10:42:14,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=664, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2024-05-12 10:42:14,571 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 25 predicate places. [2024-05-12 10:42:14,571 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 664 flow [2024-05-12 10:42:14,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:14,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:14,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:14,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:42:14,572 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 10:42:14,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash 634869165, now seen corresponding path program 3 times [2024-05-12 10:42:14,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:14,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433027511] [2024-05-12 10:42:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:14,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:14,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:14,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433027511] [2024-05-12 10:42:14,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433027511] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:14,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:14,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988030523] [2024-05-12 10:42:14,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:14,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:14,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:14,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 664 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:14,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:14,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:14,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:15,851 INFO L124 PetriNetUnfolderBase]: 7269/11064 cut-off events. [2024-05-12 10:42:15,851 INFO L125 PetriNetUnfolderBase]: For 36593/36880 co-relation queries the response was YES. [2024-05-12 10:42:15,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40612 conditions, 11064 events. 7269/11064 cut-off events. For 36593/36880 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 72240 event pairs, 2811 based on Foata normal form. 34/10985 useless extension candidates. Maximal degree in co-relation 40580. Up to 9705 conditions per place. [2024-05-12 10:42:15,908 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 101 selfloop transitions, 22 changer transitions 0/138 dead transitions. [2024-05-12 10:42:15,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 138 transitions, 1054 flow [2024-05-12 10:42:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-05-12 10:42:15,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-05-12 10:42:15,910 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 664 flow. Second operand 6 states and 216 transitions. [2024-05-12 10:42:15,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 138 transitions, 1054 flow [2024-05-12 10:42:15,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1006 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:15,965 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 700 flow [2024-05-12 10:42:15,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=700, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-05-12 10:42:15,966 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 28 predicate places. [2024-05-12 10:42:15,966 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 700 flow [2024-05-12 10:42:15,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:15,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:15,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:15,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:42:15,967 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 10:42:15,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:15,967 INFO L85 PathProgramCache]: Analyzing trace with hash 640405429, now seen corresponding path program 1 times [2024-05-12 10:42:15,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:15,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177506291] [2024-05-12 10:42:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:15,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:16,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:16,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177506291] [2024-05-12 10:42:16,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177506291] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:16,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:16,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:16,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632979473] [2024-05-12 10:42:16,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:16,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:16,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:16,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:16,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 700 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:16,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:16,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:16,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:17,243 INFO L124 PetriNetUnfolderBase]: 7230/11095 cut-off events. [2024-05-12 10:42:17,243 INFO L125 PetriNetUnfolderBase]: For 40337/40624 co-relation queries the response was YES. [2024-05-12 10:42:17,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40880 conditions, 11095 events. 7230/11095 cut-off events. For 40337/40624 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 72761 event pairs, 2733 based on Foata normal form. 28/10977 useless extension candidates. Maximal degree in co-relation 40847. Up to 9216 conditions per place. [2024-05-12 10:42:17,315 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 101 selfloop transitions, 28 changer transitions 0/144 dead transitions. [2024-05-12 10:42:17,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 144 transitions, 1117 flow [2024-05-12 10:42:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 218 transitions. [2024-05-12 10:42:17,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6606060606060606 [2024-05-12 10:42:17,317 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 700 flow. Second operand 6 states and 218 transitions. [2024-05-12 10:42:17,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 144 transitions, 1117 flow [2024-05-12 10:42:17,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 144 transitions, 1063 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:17,385 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 754 flow [2024-05-12 10:42:17,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=754, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-05-12 10:42:17,387 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 30 predicate places. [2024-05-12 10:42:17,387 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 754 flow [2024-05-12 10:42:17,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:17,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:17,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:17,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:42:17,387 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:42:17,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:17,388 INFO L85 PathProgramCache]: Analyzing trace with hash 983854834, now seen corresponding path program 1 times [2024-05-12 10:42:17,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:17,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130996659] [2024-05-12 10:42:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:17,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:17,755 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 10:42:17,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:17,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130996659] [2024-05-12 10:42:17,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130996659] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:17,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:17,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:42:17,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605509798] [2024-05-12 10:42:17,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:17,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:17,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:17,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:17,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:17,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:17,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 754 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 10:42:17,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:17,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:17,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:18,530 INFO L124 PetriNetUnfolderBase]: 5825/8935 cut-off events. [2024-05-12 10:42:18,530 INFO L125 PetriNetUnfolderBase]: For 38989/39228 co-relation queries the response was YES. [2024-05-12 10:42:18,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35009 conditions, 8935 events. 5825/8935 cut-off events. For 38989/39228 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 57644 event pairs, 2306 based on Foata normal form. 6/8867 useless extension candidates. Maximal degree in co-relation 34974. Up to 8021 conditions per place. [2024-05-12 10:42:18,586 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 97 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-05-12 10:42:18,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 1156 flow [2024-05-12 10:42:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-05-12 10:42:18,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472727272727272 [2024-05-12 10:42:18,588 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 754 flow. Second operand 5 states and 178 transitions. [2024-05-12 10:42:18,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 1156 flow [2024-05-12 10:42:18,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 133 transitions, 1097 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:18,629 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 884 flow [2024-05-12 10:42:18,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=884, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2024-05-12 10:42:18,629 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 34 predicate places. [2024-05-12 10:42:18,629 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 884 flow [2024-05-12 10:42:18,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 10:42:18,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:18,630 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 10:42:18,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:42:18,630 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:42:18,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:18,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1120771358, now seen corresponding path program 1 times [2024-05-12 10:42:18,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:18,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236377229] [2024-05-12 10:42:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:18,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:18,975 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 10:42:18,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:18,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236377229] [2024-05-12 10:42:18,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236377229] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:18,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:18,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:42:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112377726] [2024-05-12 10:42:18,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:18,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:42:18,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:42:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:42:19,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:19,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 884 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 10:42:19,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:19,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:19,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:19,896 INFO L124 PetriNetUnfolderBase]: 8314/12791 cut-off events. [2024-05-12 10:42:19,896 INFO L125 PetriNetUnfolderBase]: For 59242/59453 co-relation queries the response was YES. [2024-05-12 10:42:19,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47728 conditions, 12791 events. 8314/12791 cut-off events. For 59242/59453 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 87125 event pairs, 3844 based on Foata normal form. 51/12587 useless extension candidates. Maximal degree in co-relation 47690. Up to 11080 conditions per place. [2024-05-12 10:42:20,016 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 84 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2024-05-12 10:42:20,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1180 flow [2024-05-12 10:42:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:42:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:42:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-05-12 10:42:20,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-05-12 10:42:20,018 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 884 flow. Second operand 4 states and 138 transitions. [2024-05-12 10:42:20,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1180 flow [2024-05-12 10:42:20,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 131 transitions, 1138 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-05-12 10:42:20,128 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 965 flow [2024-05-12 10:42:20,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=965, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2024-05-12 10:42:20,129 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 39 predicate places. [2024-05-12 10:42:20,129 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 965 flow [2024-05-12 10:42:20,129 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 10:42:20,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:20,129 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 10:42:20,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:42:20,130 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 10:42:20,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:20,130 INFO L85 PathProgramCache]: Analyzing trace with hash 187903219, now seen corresponding path program 1 times [2024-05-12 10:42:20,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:20,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057505259] [2024-05-12 10:42:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:20,466 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 10:42:20,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:20,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057505259] [2024-05-12 10:42:20,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057505259] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:20,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:20,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:20,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376757652] [2024-05-12 10:42:20,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:20,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:20,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:20,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:20,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:20,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:20,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 965 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 10:42:20,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:20,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:20,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:21,442 INFO L124 PetriNetUnfolderBase]: 7149/10813 cut-off events. [2024-05-12 10:42:21,443 INFO L125 PetriNetUnfolderBase]: For 60033/60449 co-relation queries the response was YES. [2024-05-12 10:42:21,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46229 conditions, 10813 events. 7149/10813 cut-off events. For 60033/60449 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 70806 event pairs, 2045 based on Foata normal form. 130/10849 useless extension candidates. Maximal degree in co-relation 46187. Up to 8966 conditions per place. [2024-05-12 10:42:21,530 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 114 selfloop transitions, 32 changer transitions 0/166 dead transitions. [2024-05-12 10:42:21,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 166 transitions, 1508 flow [2024-05-12 10:42:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 218 transitions. [2024-05-12 10:42:21,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6606060606060606 [2024-05-12 10:42:21,532 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 965 flow. Second operand 6 states and 218 transitions. [2024-05-12 10:42:21,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 166 transitions, 1508 flow [2024-05-12 10:42:21,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 166 transitions, 1504 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 10:42:21,642 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 1135 flow [2024-05-12 10:42:21,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1135, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2024-05-12 10:42:21,643 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 46 predicate places. [2024-05-12 10:42:21,643 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 1135 flow [2024-05-12 10:42:21,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 10:42:21,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:21,643 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 10:42:21,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:42:21,644 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 10:42:21,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash 190760179, now seen corresponding path program 2 times [2024-05-12 10:42:21,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:21,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586244721] [2024-05-12 10:42:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:21,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:22,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586244721] [2024-05-12 10:42:22,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586244721] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:22,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:22,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:22,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698468508] [2024-05-12 10:42:22,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:22,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:22,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:22,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 1135 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 10:42:22,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:22,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:22,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:23,043 INFO L124 PetriNetUnfolderBase]: 7028/11015 cut-off events. [2024-05-12 10:42:23,043 INFO L125 PetriNetUnfolderBase]: For 69683/70029 co-relation queries the response was YES. [2024-05-12 10:42:23,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47265 conditions, 11015 events. 7028/11015 cut-off events. For 69683/70029 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 75402 event pairs, 3040 based on Foata normal form. 68/10930 useless extension candidates. Maximal degree in co-relation 47219. Up to 9447 conditions per place. [2024-05-12 10:42:23,121 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 112 selfloop transitions, 26 changer transitions 0/158 dead transitions. [2024-05-12 10:42:23,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 158 transitions, 1511 flow [2024-05-12 10:42:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-05-12 10:42:23,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6393939393939394 [2024-05-12 10:42:23,122 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 1135 flow. Second operand 6 states and 211 transitions. [2024-05-12 10:42:23,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 158 transitions, 1511 flow [2024-05-12 10:42:23,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 158 transitions, 1429 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:23,267 INFO L231 Difference]: Finished difference. Result has 110 places, 121 transitions, 1113 flow [2024-05-12 10:42:23,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1113, PETRI_PLACES=110, PETRI_TRANSITIONS=121} [2024-05-12 10:42:23,268 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 49 predicate places. [2024-05-12 10:42:23,268 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 121 transitions, 1113 flow [2024-05-12 10:42:23,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 10:42:23,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:23,268 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 10:42:23,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:42:23,268 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 10:42:23,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:23,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1995706603, now seen corresponding path program 1 times [2024-05-12 10:42:23,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:23,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938664272] [2024-05-12 10:42:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:23,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:23,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:23,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938664272] [2024-05-12 10:42:23,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938664272] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:23,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:23,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538992217] [2024-05-12 10:42:23,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:23,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:23,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:23,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:23,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:23,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 121 transitions, 1113 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 10:42:23,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:23,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:23,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:24,826 INFO L124 PetriNetUnfolderBase]: 8633/12904 cut-off events. [2024-05-12 10:42:24,827 INFO L125 PetriNetUnfolderBase]: For 75018/75306 co-relation queries the response was YES. [2024-05-12 10:42:24,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55067 conditions, 12904 events. 8633/12904 cut-off events. For 75018/75306 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 84266 event pairs, 2713 based on Foata normal form. 40/12793 useless extension candidates. Maximal degree in co-relation 55020. Up to 11490 conditions per place. [2024-05-12 10:42:24,901 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 97 selfloop transitions, 41 changer transitions 0/155 dead transitions. [2024-05-12 10:42:24,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1513 flow [2024-05-12 10:42:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-05-12 10:42:24,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-05-12 10:42:24,903 INFO L175 Difference]: Start difference. First operand has 110 places, 121 transitions, 1113 flow. Second operand 5 states and 180 transitions. [2024-05-12 10:42:24,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1513 flow [2024-05-12 10:42:25,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 155 transitions, 1457 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:25,035 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 1207 flow [2024-05-12 10:42:25,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1207, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-05-12 10:42:25,036 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 50 predicate places. [2024-05-12 10:42:25,036 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 1207 flow [2024-05-12 10:42:25,036 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 10:42:25,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:25,036 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 10:42:25,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:42:25,037 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 10:42:25,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:25,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1675470485, now seen corresponding path program 2 times [2024-05-12 10:42:25,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:25,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223744323] [2024-05-12 10:42:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:25,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:25,437 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 10:42:25,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:25,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223744323] [2024-05-12 10:42:25,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223744323] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:25,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:25,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:25,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824299772] [2024-05-12 10:42:25,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:25,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:25,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:25,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:25,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:25,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:25,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 1207 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 10:42:25,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:25,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:25,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:26,746 INFO L124 PetriNetUnfolderBase]: 8716/13032 cut-off events. [2024-05-12 10:42:26,747 INFO L125 PetriNetUnfolderBase]: For 86849/87273 co-relation queries the response was YES. [2024-05-12 10:42:26,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58328 conditions, 13032 events. 8716/13032 cut-off events. For 86849/87273 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 85265 event pairs, 2734 based on Foata normal form. 80/12961 useless extension candidates. Maximal degree in co-relation 58280. Up to 11536 conditions per place. [2024-05-12 10:42:26,820 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 105 selfloop transitions, 51 changer transitions 0/173 dead transitions. [2024-05-12 10:42:26,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 173 transitions, 1781 flow [2024-05-12 10:42:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-05-12 10:42:26,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6484848484848484 [2024-05-12 10:42:26,821 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 1207 flow. Second operand 6 states and 214 transitions. [2024-05-12 10:42:26,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 173 transitions, 1781 flow [2024-05-12 10:42:26,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 173 transitions, 1679 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:26,943 INFO L231 Difference]: Finished difference. Result has 114 places, 133 transitions, 1332 flow [2024-05-12 10:42:26,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1332, PETRI_PLACES=114, PETRI_TRANSITIONS=133} [2024-05-12 10:42:26,951 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 53 predicate places. [2024-05-12 10:42:26,951 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 133 transitions, 1332 flow [2024-05-12 10:42:26,951 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 10:42:26,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:26,951 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 10:42:26,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:42:26,952 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 10:42:26,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1675739255, now seen corresponding path program 3 times [2024-05-12 10:42:26,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:26,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497134811] [2024-05-12 10:42:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:26,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:27,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497134811] [2024-05-12 10:42:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497134811] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:27,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:27,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:27,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978619853] [2024-05-12 10:42:27,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:27,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:27,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:27,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:27,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 133 transitions, 1332 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 10:42:27,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:27,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:27,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:28,428 INFO L124 PetriNetUnfolderBase]: 8737/13049 cut-off events. [2024-05-12 10:42:28,429 INFO L125 PetriNetUnfolderBase]: For 100953/101415 co-relation queries the response was YES. [2024-05-12 10:42:28,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61263 conditions, 13049 events. 8737/13049 cut-off events. For 100953/101415 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 85263 event pairs, 2732 based on Foata normal form. 112/12997 useless extension candidates. Maximal degree in co-relation 61214. Up to 11552 conditions per place. [2024-05-12 10:42:28,533 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 103 selfloop transitions, 55 changer transitions 0/175 dead transitions. [2024-05-12 10:42:28,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 175 transitions, 1864 flow [2024-05-12 10:42:28,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 212 transitions. [2024-05-12 10:42:28,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6424242424242425 [2024-05-12 10:42:28,541 INFO L175 Difference]: Start difference. First operand has 114 places, 133 transitions, 1332 flow. Second operand 6 states and 212 transitions. [2024-05-12 10:42:28,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 175 transitions, 1864 flow [2024-05-12 10:42:28,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 175 transitions, 1765 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:28,884 INFO L231 Difference]: Finished difference. Result has 118 places, 137 transitions, 1414 flow [2024-05-12 10:42:28,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1414, PETRI_PLACES=118, PETRI_TRANSITIONS=137} [2024-05-12 10:42:28,890 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 57 predicate places. [2024-05-12 10:42:28,890 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 137 transitions, 1414 flow [2024-05-12 10:42:28,891 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 10:42:28,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:28,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:28,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:42:28,891 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 10:42:28,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:28,892 INFO L85 PathProgramCache]: Analyzing trace with hash 498844517, now seen corresponding path program 4 times [2024-05-12 10:42:28,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:28,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812616518] [2024-05-12 10:42:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:28,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:29,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:29,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812616518] [2024-05-12 10:42:29,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812616518] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:29,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:29,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:29,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354902704] [2024-05-12 10:42:29,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:29,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:29,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:29,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:29,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:29,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 137 transitions, 1414 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 10:42:29,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:29,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:29,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:30,698 INFO L124 PetriNetUnfolderBase]: 8720/13401 cut-off events. [2024-05-12 10:42:30,698 INFO L125 PetriNetUnfolderBase]: For 107420/107826 co-relation queries the response was YES. [2024-05-12 10:42:30,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62082 conditions, 13401 events. 8720/13401 cut-off events. For 107420/107826 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 91053 event pairs, 3421 based on Foata normal form. 26/13229 useless extension candidates. Maximal degree in co-relation 62031. Up to 11616 conditions per place. [2024-05-12 10:42:30,813 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 111 selfloop transitions, 41 changer transitions 0/169 dead transitions. [2024-05-12 10:42:30,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 169 transitions, 1800 flow [2024-05-12 10:42:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-05-12 10:42:30,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618181818181819 [2024-05-12 10:42:30,815 INFO L175 Difference]: Start difference. First operand has 118 places, 137 transitions, 1414 flow. Second operand 5 states and 182 transitions. [2024-05-12 10:42:30,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 169 transitions, 1800 flow [2024-05-12 10:42:31,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 169 transitions, 1645 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:31,113 INFO L231 Difference]: Finished difference. Result has 120 places, 137 transitions, 1355 flow [2024-05-12 10:42:31,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1355, PETRI_PLACES=120, PETRI_TRANSITIONS=137} [2024-05-12 10:42:31,114 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 59 predicate places. [2024-05-12 10:42:31,114 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 137 transitions, 1355 flow [2024-05-12 10:42:31,114 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 10:42:31,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:31,115 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 10:42:31,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:42:31,115 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 10:42:31,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash 121592323, now seen corresponding path program 1 times [2024-05-12 10:42:31,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:31,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70255691] [2024-05-12 10:42:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:31,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:31,455 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 10:42:31,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:31,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70255691] [2024-05-12 10:42:31,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70255691] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:31,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:31,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:42:31,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330265640] [2024-05-12 10:42:31,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:31,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:31,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:31,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:31,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 137 transitions, 1355 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 10:42:31,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:31,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:31,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:32,718 INFO L124 PetriNetUnfolderBase]: 8575/13052 cut-off events. [2024-05-12 10:42:32,718 INFO L125 PetriNetUnfolderBase]: For 114432/114777 co-relation queries the response was YES. [2024-05-12 10:42:32,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58659 conditions, 13052 events. 8575/13052 cut-off events. For 114432/114777 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 88538 event pairs, 3610 based on Foata normal form. 126/12886 useless extension candidates. Maximal degree in co-relation 58607. Up to 11334 conditions per place. [2024-05-12 10:42:32,820 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 95 selfloop transitions, 27 changer transitions 0/160 dead transitions. [2024-05-12 10:42:32,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1687 flow [2024-05-12 10:42:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:42:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:42:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-05-12 10:42:32,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-05-12 10:42:32,822 INFO L175 Difference]: Start difference. First operand has 120 places, 137 transitions, 1355 flow. Second operand 4 states and 142 transitions. [2024-05-12 10:42:32,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1687 flow [2024-05-12 10:42:33,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 160 transitions, 1572 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:33,058 INFO L231 Difference]: Finished difference. Result has 119 places, 143 transitions, 1368 flow [2024-05-12 10:42:33,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1368, PETRI_PLACES=119, PETRI_TRANSITIONS=143} [2024-05-12 10:42:33,058 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 58 predicate places. [2024-05-12 10:42:33,058 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 143 transitions, 1368 flow [2024-05-12 10:42:33,058 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 10:42:33,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:33,059 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 10:42:33,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:42:33,059 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:42:33,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2017260477, now seen corresponding path program 2 times [2024-05-12 10:42:33,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:33,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4492655] [2024-05-12 10:42:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:33,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:33,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:33,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4492655] [2024-05-12 10:42:33,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4492655] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:33,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:33,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:33,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143675328] [2024-05-12 10:42:33,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:33,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:33,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:33,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:33,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:33,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:33,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 143 transitions, 1368 flow. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 10:42:33,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:33,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:33,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:34,624 INFO L124 PetriNetUnfolderBase]: 8555/12947 cut-off events. [2024-05-12 10:42:34,625 INFO L125 PetriNetUnfolderBase]: For 121393/121605 co-relation queries the response was YES. [2024-05-12 10:42:34,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62078 conditions, 12947 events. 8555/12947 cut-off events. For 121393/121605 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 86328 event pairs, 3021 based on Foata normal form. 64/12785 useless extension candidates. Maximal degree in co-relation 62025. Up to 11362 conditions per place. [2024-05-12 10:42:34,736 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 121 selfloop transitions, 30 changer transitions 0/189 dead transitions. [2024-05-12 10:42:34,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 189 transitions, 1893 flow [2024-05-12 10:42:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 231 transitions. [2024-05-12 10:42:34,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:42:34,737 INFO L175 Difference]: Start difference. First operand has 119 places, 143 transitions, 1368 flow. Second operand 7 states and 231 transitions. [2024-05-12 10:42:34,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 189 transitions, 1893 flow [2024-05-12 10:42:35,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 189 transitions, 1802 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:35,054 INFO L231 Difference]: Finished difference. Result has 126 places, 156 transitions, 1533 flow [2024-05-12 10:42:35,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1533, PETRI_PLACES=126, PETRI_TRANSITIONS=156} [2024-05-12 10:42:35,055 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 65 predicate places. [2024-05-12 10:42:35,055 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 156 transitions, 1533 flow [2024-05-12 10:42:35,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 10:42:35,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:35,055 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 10:42:35,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:42:35,055 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:42:35,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 965072641, now seen corresponding path program 1 times [2024-05-12 10:42:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624241011] [2024-05-12 10:42:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:35,358 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 10:42:35,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:35,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624241011] [2024-05-12 10:42:35,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624241011] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:35,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:35,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:42:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128939042] [2024-05-12 10:42:35,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:35,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:35,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:42:35,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 156 transitions, 1533 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 10:42:35,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:35,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:42:35,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:36,569 INFO L124 PetriNetUnfolderBase]: 9481/13835 cut-off events. [2024-05-12 10:42:36,569 INFO L125 PetriNetUnfolderBase]: For 123121/123121 co-relation queries the response was YES. [2024-05-12 10:42:36,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69113 conditions, 13835 events. 9481/13835 cut-off events. For 123121/123121 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 87090 event pairs, 2827 based on Foata normal form. 1/13831 useless extension candidates. Maximal degree in co-relation 69057. Up to 12945 conditions per place. [2024-05-12 10:42:36,680 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 165 selfloop transitions, 19 changer transitions 0/198 dead transitions. [2024-05-12 10:42:36,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 198 transitions, 2192 flow [2024-05-12 10:42:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-05-12 10:42:36,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6072727272727273 [2024-05-12 10:42:36,681 INFO L175 Difference]: Start difference. First operand has 126 places, 156 transitions, 1533 flow. Second operand 5 states and 167 transitions. [2024-05-12 10:42:36,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 198 transitions, 2192 flow [2024-05-12 10:42:36,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 198 transitions, 2135 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:36,960 INFO L231 Difference]: Finished difference. Result has 131 places, 173 transitions, 1757 flow [2024-05-12 10:42:36,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1757, PETRI_PLACES=131, PETRI_TRANSITIONS=173} [2024-05-12 10:42:36,960 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 70 predicate places. [2024-05-12 10:42:36,960 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 173 transitions, 1757 flow [2024-05-12 10:42:36,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 10:42:36,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:36,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:36,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:42:36,961 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:42:36,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1973317605, now seen corresponding path program 2 times [2024-05-12 10:42:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:36,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423035186] [2024-05-12 10:42:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:37,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:37,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423035186] [2024-05-12 10:42:37,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423035186] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:37,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:37,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:42:37,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116263942] [2024-05-12 10:42:37,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:37,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:37,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:37,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:37,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:37,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:42:37,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 173 transitions, 1757 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 10:42:37,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:37,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:42:37,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:38,528 INFO L124 PetriNetUnfolderBase]: 9477/13854 cut-off events. [2024-05-12 10:42:38,529 INFO L125 PetriNetUnfolderBase]: For 135602/135602 co-relation queries the response was YES. [2024-05-12 10:42:38,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71565 conditions, 13854 events. 9477/13854 cut-off events. For 135602/135602 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 87373 event pairs, 3935 based on Foata normal form. 1/13835 useless extension candidates. Maximal degree in co-relation 71505. Up to 12941 conditions per place. [2024-05-12 10:42:38,660 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 158 selfloop transitions, 20 changer transitions 0/192 dead transitions. [2024-05-12 10:42:38,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 192 transitions, 2164 flow [2024-05-12 10:42:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-05-12 10:42:38,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-05-12 10:42:38,661 INFO L175 Difference]: Start difference. First operand has 131 places, 173 transitions, 1757 flow. Second operand 5 states and 160 transitions. [2024-05-12 10:42:38,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 192 transitions, 2164 flow [2024-05-12 10:42:39,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 192 transitions, 2100 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-05-12 10:42:39,372 INFO L231 Difference]: Finished difference. Result has 136 places, 174 transitions, 1749 flow [2024-05-12 10:42:39,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1749, PETRI_PLACES=136, PETRI_TRANSITIONS=174} [2024-05-12 10:42:39,373 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 75 predicate places. [2024-05-12 10:42:39,373 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 174 transitions, 1749 flow [2024-05-12 10:42:39,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 10:42:39,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:39,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:39,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:42:39,374 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:42:39,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2017241629, now seen corresponding path program 1 times [2024-05-12 10:42:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823185438] [2024-05-12 10:42:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:39,687 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 10:42:39,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:39,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823185438] [2024-05-12 10:42:39,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823185438] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:39,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:39,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:42:39,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647292759] [2024-05-12 10:42:39,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:39,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:39,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:39,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:39,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:39,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:42:39,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 174 transitions, 1749 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 10:42:39,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:39,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:42:39,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:41,151 INFO L124 PetriNetUnfolderBase]: 8679/13527 cut-off events. [2024-05-12 10:42:41,152 INFO L125 PetriNetUnfolderBase]: For 142440/142575 co-relation queries the response was YES. [2024-05-12 10:42:41,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66807 conditions, 13527 events. 8679/13527 cut-off events. For 142440/142575 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 93425 event pairs, 3794 based on Foata normal form. 65/13340 useless extension candidates. Maximal degree in co-relation 66744. Up to 11452 conditions per place. [2024-05-12 10:42:41,279 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 135 selfloop transitions, 18 changer transitions 0/196 dead transitions. [2024-05-12 10:42:41,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 196 transitions, 2125 flow [2024-05-12 10:42:41,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-05-12 10:42:41,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036363636363636 [2024-05-12 10:42:41,280 INFO L175 Difference]: Start difference. First operand has 136 places, 174 transitions, 1749 flow. Second operand 5 states and 166 transitions. [2024-05-12 10:42:41,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 196 transitions, 2125 flow [2024-05-12 10:42:41,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 196 transitions, 2090 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-05-12 10:42:41,574 INFO L231 Difference]: Finished difference. Result has 140 places, 177 transitions, 1789 flow [2024-05-12 10:42:41,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1789, PETRI_PLACES=140, PETRI_TRANSITIONS=177} [2024-05-12 10:42:41,574 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 79 predicate places. [2024-05-12 10:42:41,574 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 177 transitions, 1789 flow [2024-05-12 10:42:41,575 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 10:42:41,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:41,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:41,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:42:41,575 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:42:41,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1503293114, now seen corresponding path program 1 times [2024-05-12 10:42:41,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:41,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104784262] [2024-05-12 10:42:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:41,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:41,964 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 10:42:41,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:41,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104784262] [2024-05-12 10:42:41,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104784262] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:41,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:41,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:41,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031412265] [2024-05-12 10:42:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:41,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:41,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:42,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:42,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 177 transitions, 1789 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 10:42:42,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:42,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:42,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:43,616 INFO L124 PetriNetUnfolderBase]: 9016/13721 cut-off events. [2024-05-12 10:42:43,617 INFO L125 PetriNetUnfolderBase]: For 149253/149272 co-relation queries the response was YES. [2024-05-12 10:42:43,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70708 conditions, 13721 events. 9016/13721 cut-off events. For 149253/149272 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 91438 event pairs, 3877 based on Foata normal form. 8/13607 useless extension candidates. Maximal degree in co-relation 70643. Up to 12130 conditions per place. [2024-05-12 10:42:43,784 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 154 selfloop transitions, 26 changer transitions 0/206 dead transitions. [2024-05-12 10:42:43,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 206 transitions, 2312 flow [2024-05-12 10:42:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-05-12 10:42:43,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036363636363636 [2024-05-12 10:42:43,786 INFO L175 Difference]: Start difference. First operand has 140 places, 177 transitions, 1789 flow. Second operand 5 states and 166 transitions. [2024-05-12 10:42:43,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 206 transitions, 2312 flow [2024-05-12 10:42:44,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 206 transitions, 2271 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:44,205 INFO L231 Difference]: Finished difference. Result has 145 places, 188 transitions, 1973 flow [2024-05-12 10:42:44,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1973, PETRI_PLACES=145, PETRI_TRANSITIONS=188} [2024-05-12 10:42:44,206 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 84 predicate places. [2024-05-12 10:42:44,206 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 188 transitions, 1973 flow [2024-05-12 10:42:44,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 10:42:44,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:44,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:44,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:42:44,207 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 10:42:44,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash 99245754, now seen corresponding path program 1 times [2024-05-12 10:42:44,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:44,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713787920] [2024-05-12 10:42:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:44,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:44,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:44,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713787920] [2024-05-12 10:42:44,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713787920] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:44,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:44,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:44,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458023882] [2024-05-12 10:42:44,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:44,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:44,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:44,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:44,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:44,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 188 transitions, 1973 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:44,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:44,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:44,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:46,692 INFO L124 PetriNetUnfolderBase]: 10245/15397 cut-off events. [2024-05-12 10:42:46,692 INFO L125 PetriNetUnfolderBase]: For 219835/220613 co-relation queries the response was YES. [2024-05-12 10:42:46,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87662 conditions, 15397 events. 10245/15397 cut-off events. For 219835/220613 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 104413 event pairs, 1643 based on Foata normal form. 133/15245 useless extension candidates. Maximal degree in co-relation 87593. Up to 8604 conditions per place. [2024-05-12 10:42:46,851 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 171 selfloop transitions, 70 changer transitions 0/262 dead transitions. [2024-05-12 10:42:46,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 262 transitions, 2995 flow [2024-05-12 10:42:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-05-12 10:42:46,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6831168831168831 [2024-05-12 10:42:46,853 INFO L175 Difference]: Start difference. First operand has 145 places, 188 transitions, 1973 flow. Second operand 7 states and 263 transitions. [2024-05-12 10:42:46,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 262 transitions, 2995 flow [2024-05-12 10:42:47,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 262 transitions, 2937 flow, removed 29 selfloop flow, removed 0 redundant places. [2024-05-12 10:42:47,364 INFO L231 Difference]: Finished difference. Result has 153 places, 193 transitions, 2197 flow [2024-05-12 10:42:47,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2197, PETRI_PLACES=153, PETRI_TRANSITIONS=193} [2024-05-12 10:42:47,364 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 92 predicate places. [2024-05-12 10:42:47,364 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 193 transitions, 2197 flow [2024-05-12 10:42:47,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:47,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:47,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:47,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:42:47,365 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 10:42:47,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1595036270, now seen corresponding path program 2 times [2024-05-12 10:42:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:47,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309423218] [2024-05-12 10:42:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:47,717 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 10:42:47,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309423218] [2024-05-12 10:42:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309423218] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:47,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:47,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:47,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857734456] [2024-05-12 10:42:47,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:47,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:47,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:47,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:47,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:47,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 193 transitions, 2197 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:47,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:47,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:47,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:49,595 INFO L124 PetriNetUnfolderBase]: 10086/15199 cut-off events. [2024-05-12 10:42:49,595 INFO L125 PetriNetUnfolderBase]: For 229029/229764 co-relation queries the response was YES. [2024-05-12 10:42:49,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89100 conditions, 15199 events. 10086/15199 cut-off events. For 229029/229764 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 102920 event pairs, 2269 based on Foata normal form. 57/14947 useless extension candidates. Maximal degree in co-relation 89027. Up to 12749 conditions per place. [2024-05-12 10:42:49,729 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 185 selfloop transitions, 33 changer transitions 0/239 dead transitions. [2024-05-12 10:42:49,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 239 transitions, 2817 flow [2024-05-12 10:42:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-05-12 10:42:49,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-05-12 10:42:49,731 INFO L175 Difference]: Start difference. First operand has 153 places, 193 transitions, 2197 flow. Second operand 6 states and 213 transitions. [2024-05-12 10:42:49,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 239 transitions, 2817 flow [2024-05-12 10:42:50,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 239 transitions, 2737 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:50,289 INFO L231 Difference]: Finished difference. Result has 157 places, 193 transitions, 2189 flow [2024-05-12 10:42:50,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2189, PETRI_PLACES=157, PETRI_TRANSITIONS=193} [2024-05-12 10:42:50,290 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 96 predicate places. [2024-05-12 10:42:50,290 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 193 transitions, 2189 flow [2024-05-12 10:42:50,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:50,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:50,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:50,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:42:50,290 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 10:42:50,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:50,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1693397356, now seen corresponding path program 3 times [2024-05-12 10:42:50,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:50,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476965164] [2024-05-12 10:42:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:50,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:50,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:50,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476965164] [2024-05-12 10:42:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476965164] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:50,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:50,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:50,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382657387] [2024-05-12 10:42:50,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:50,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:50,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:50,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:50,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:50,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:50,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 193 transitions, 2189 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:50,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:50,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:50,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:52,555 INFO L124 PetriNetUnfolderBase]: 10587/15866 cut-off events. [2024-05-12 10:42:52,556 INFO L125 PetriNetUnfolderBase]: For 253950/254661 co-relation queries the response was YES. [2024-05-12 10:42:52,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93810 conditions, 15866 events. 10587/15866 cut-off events. For 253950/254661 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 107889 event pairs, 2716 based on Foata normal form. 161/15697 useless extension candidates. Maximal degree in co-relation 93735. Up to 10796 conditions per place. [2024-05-12 10:42:52,722 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 163 selfloop transitions, 63 changer transitions 0/247 dead transitions. [2024-05-12 10:42:52,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 247 transitions, 2986 flow [2024-05-12 10:42:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2024-05-12 10:42:52,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6787878787878788 [2024-05-12 10:42:52,724 INFO L175 Difference]: Start difference. First operand has 157 places, 193 transitions, 2189 flow. Second operand 6 states and 224 transitions. [2024-05-12 10:42:52,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 247 transitions, 2986 flow [2024-05-12 10:42:53,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 247 transitions, 2912 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:53,424 INFO L231 Difference]: Finished difference. Result has 159 places, 194 transitions, 2279 flow [2024-05-12 10:42:53,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2279, PETRI_PLACES=159, PETRI_TRANSITIONS=194} [2024-05-12 10:42:53,425 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 98 predicate places. [2024-05-12 10:42:53,425 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 194 transitions, 2279 flow [2024-05-12 10:42:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:53,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:53,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:53,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:42:53,426 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 10:42:53,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1292136624, now seen corresponding path program 4 times [2024-05-12 10:42:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:53,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288038157] [2024-05-12 10:42:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:53,838 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 10:42:53,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:53,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288038157] [2024-05-12 10:42:53,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288038157] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:53,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:53,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:53,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508690755] [2024-05-12 10:42:53,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:53,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:53,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:53,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:53,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:53,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:53,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 194 transitions, 2279 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:53,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:53,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:53,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:55,785 INFO L124 PetriNetUnfolderBase]: 10370/15670 cut-off events. [2024-05-12 10:42:55,785 INFO L125 PetriNetUnfolderBase]: For 253949/254728 co-relation queries the response was YES. [2024-05-12 10:42:55,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91778 conditions, 15670 events. 10370/15670 cut-off events. For 253949/254728 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 107682 event pairs, 3631 based on Foata normal form. 198/15474 useless extension candidates. Maximal degree in co-relation 91702. Up to 12892 conditions per place. [2024-05-12 10:42:55,926 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 160 selfloop transitions, 55 changer transitions 0/236 dead transitions. [2024-05-12 10:42:55,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 236 transitions, 2877 flow [2024-05-12 10:42:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-05-12 10:42:55,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-05-12 10:42:55,927 INFO L175 Difference]: Start difference. First operand has 159 places, 194 transitions, 2279 flow. Second operand 6 states and 215 transitions. [2024-05-12 10:42:55,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 236 transitions, 2877 flow [2024-05-12 10:42:56,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 236 transitions, 2721 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:56,565 INFO L231 Difference]: Finished difference. Result has 160 places, 194 transitions, 2245 flow [2024-05-12 10:42:56,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2245, PETRI_PLACES=160, PETRI_TRANSITIONS=194} [2024-05-12 10:42:56,565 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 99 predicate places. [2024-05-12 10:42:56,566 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 194 transitions, 2245 flow [2024-05-12 10:42:56,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:56,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:56,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:56,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:42:56,566 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 10:42:56,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash -493159788, now seen corresponding path program 5 times [2024-05-12 10:42:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750890510] [2024-05-12 10:42:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:56,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750890510] [2024-05-12 10:42:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750890510] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:56,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:56,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:56,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392837738] [2024-05-12 10:42:56,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:56,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:56,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:56,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:56,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:56,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:42:56,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 194 transitions, 2245 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:56,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:56,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:42:56,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:58,915 INFO L124 PetriNetUnfolderBase]: 11518/17299 cut-off events. [2024-05-12 10:42:58,916 INFO L125 PetriNetUnfolderBase]: For 282587/283457 co-relation queries the response was YES. [2024-05-12 10:42:59,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102008 conditions, 17299 events. 11518/17299 cut-off events. For 282587/283457 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 119892 event pairs, 3349 based on Foata normal form. 203/17147 useless extension candidates. Maximal degree in co-relation 101932. Up to 13641 conditions per place. [2024-05-12 10:42:59,097 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 167 selfloop transitions, 68 changer transitions 0/256 dead transitions. [2024-05-12 10:42:59,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 256 transitions, 3089 flow [2024-05-12 10:42:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 254 transitions. [2024-05-12 10:42:59,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597402597402597 [2024-05-12 10:42:59,098 INFO L175 Difference]: Start difference. First operand has 160 places, 194 transitions, 2245 flow. Second operand 7 states and 254 transitions. [2024-05-12 10:42:59,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 256 transitions, 3089 flow [2024-05-12 10:42:59,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 256 transitions, 2946 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:59,879 INFO L231 Difference]: Finished difference. Result has 161 places, 196 transitions, 2306 flow [2024-05-12 10:42:59,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2306, PETRI_PLACES=161, PETRI_TRANSITIONS=196} [2024-05-12 10:42:59,880 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 100 predicate places. [2024-05-12 10:42:59,881 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 196 transitions, 2306 flow [2024-05-12 10:42:59,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:42:59,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:59,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:59,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:42:59,881 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:42:59,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash -236190558, now seen corresponding path program 6 times [2024-05-12 10:42:59,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:59,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632391087] [2024-05-12 10:42:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:59,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:00,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:00,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632391087] [2024-05-12 10:43:00,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632391087] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:00,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:00,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:00,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438516731] [2024-05-12 10:43:00,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:00,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:00,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:00,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:43:00,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 196 transitions, 2306 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:00,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:00,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:43:00,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:02,459 INFO L124 PetriNetUnfolderBase]: 12065/18070 cut-off events. [2024-05-12 10:43:02,459 INFO L125 PetriNetUnfolderBase]: For 299107/299958 co-relation queries the response was YES. [2024-05-12 10:43:02,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106804 conditions, 18070 events. 12065/18070 cut-off events. For 299107/299958 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 125707 event pairs, 3671 based on Foata normal form. 179/17894 useless extension candidates. Maximal degree in co-relation 106728. Up to 15484 conditions per place. [2024-05-12 10:43:02,634 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 159 selfloop transitions, 66 changer transitions 0/246 dead transitions. [2024-05-12 10:43:02,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 246 transitions, 2952 flow [2024-05-12 10:43:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 245 transitions. [2024-05-12 10:43:02,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-05-12 10:43:02,635 INFO L175 Difference]: Start difference. First operand has 161 places, 196 transitions, 2306 flow. Second operand 7 states and 245 transitions. [2024-05-12 10:43:02,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 246 transitions, 2952 flow [2024-05-12 10:43:03,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 246 transitions, 2850 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-05-12 10:43:03,204 INFO L231 Difference]: Finished difference. Result has 165 places, 197 transitions, 2376 flow [2024-05-12 10:43:03,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2376, PETRI_PLACES=165, PETRI_TRANSITIONS=197} [2024-05-12 10:43:03,204 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 104 predicate places. [2024-05-12 10:43:03,204 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 197 transitions, 2376 flow [2024-05-12 10:43:03,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:03,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:03,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:03,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:43:03,205 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 10:43:03,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:03,206 INFO L85 PathProgramCache]: Analyzing trace with hash -227253258, now seen corresponding path program 7 times [2024-05-12 10:43:03,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:03,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825898775] [2024-05-12 10:43:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:03,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:03,521 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 10:43:03,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:03,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825898775] [2024-05-12 10:43:03,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825898775] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:03,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:03,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:03,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518755536] [2024-05-12 10:43:03,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:03,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:03,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:03,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:43:03,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 197 transitions, 2376 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:03,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:03,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:43:03,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:06,461 INFO L124 PetriNetUnfolderBase]: 12471/19064 cut-off events. [2024-05-12 10:43:06,461 INFO L125 PetriNetUnfolderBase]: For 309606/310498 co-relation queries the response was YES. [2024-05-12 10:43:06,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110279 conditions, 19064 events. 12471/19064 cut-off events. For 309606/310498 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 136259 event pairs, 4162 based on Foata normal form. 183/18860 useless extension candidates. Maximal degree in co-relation 110201. Up to 16139 conditions per place. [2024-05-12 10:43:06,642 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 157 selfloop transitions, 67 changer transitions 0/245 dead transitions. [2024-05-12 10:43:06,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 245 transitions, 3020 flow [2024-05-12 10:43:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 243 transitions. [2024-05-12 10:43:06,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6311688311688312 [2024-05-12 10:43:06,644 INFO L175 Difference]: Start difference. First operand has 165 places, 197 transitions, 2376 flow. Second operand 7 states and 243 transitions. [2024-05-12 10:43:06,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 245 transitions, 3020 flow [2024-05-12 10:43:07,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 245 transitions, 2884 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:07,266 INFO L231 Difference]: Finished difference. Result has 167 places, 198 transitions, 2410 flow [2024-05-12 10:43:07,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2410, PETRI_PLACES=167, PETRI_TRANSITIONS=198} [2024-05-12 10:43:07,266 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 106 predicate places. [2024-05-12 10:43:07,267 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 198 transitions, 2410 flow [2024-05-12 10:43:07,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:07,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:07,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:07,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:43:07,267 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 10:43:07,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash 72240724, now seen corresponding path program 8 times [2024-05-12 10:43:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:07,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534229905] [2024-05-12 10:43:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:07,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534229905] [2024-05-12 10:43:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534229905] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:07,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:07,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:07,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248269820] [2024-05-12 10:43:07,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:07,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:07,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:07,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:07,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:43:07,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 198 transitions, 2410 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:07,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:07,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:43:07,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:10,315 INFO L124 PetriNetUnfolderBase]: 12413/19316 cut-off events. [2024-05-12 10:43:10,316 INFO L125 PetriNetUnfolderBase]: For 307286/308218 co-relation queries the response was YES. [2024-05-12 10:43:10,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108702 conditions, 19316 events. 12413/19316 cut-off events. For 307286/308218 co-relation queries the response was YES. Maximal size of possible extension queue 984. Compared 141588 event pairs, 4945 based on Foata normal form. 132/18980 useless extension candidates. Maximal degree in co-relation 108623. Up to 15860 conditions per place. [2024-05-12 10:43:10,563 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 168 selfloop transitions, 55 changer transitions 0/244 dead transitions. [2024-05-12 10:43:10,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 244 transitions, 3016 flow [2024-05-12 10:43:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:43:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:43:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-05-12 10:43:10,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-05-12 10:43:10,572 INFO L175 Difference]: Start difference. First operand has 167 places, 198 transitions, 2410 flow. Second operand 6 states and 219 transitions. [2024-05-12 10:43:10,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 244 transitions, 3016 flow [2024-05-12 10:43:11,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 244 transitions, 2870 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:11,302 INFO L231 Difference]: Finished difference. Result has 168 places, 198 transitions, 2386 flow [2024-05-12 10:43:11,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2386, PETRI_PLACES=168, PETRI_TRANSITIONS=198} [2024-05-12 10:43:11,303 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 107 predicate places. [2024-05-12 10:43:11,304 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 198 transitions, 2386 flow [2024-05-12 10:43:11,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:11,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:11,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:11,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:43:11,304 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 10:43:11,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 138190068, now seen corresponding path program 1 times [2024-05-12 10:43:11,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:11,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422947347] [2024-05-12 10:43:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:11,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:11,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:11,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422947347] [2024-05-12 10:43:11,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422947347] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:11,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:11,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:11,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967470928] [2024-05-12 10:43:11,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:11,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:11,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:11,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:11,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:11,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:43:11,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 198 transitions, 2386 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:11,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:11,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:43:11,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:14,620 INFO L124 PetriNetUnfolderBase]: 13064/20047 cut-off events. [2024-05-12 10:43:14,621 INFO L125 PetriNetUnfolderBase]: For 325678/326617 co-relation queries the response was YES. [2024-05-12 10:43:14,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114818 conditions, 20047 events. 13064/20047 cut-off events. For 325678/326617 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 144863 event pairs, 4191 based on Foata normal form. 175/19758 useless extension candidates. Maximal degree in co-relation 114738. Up to 10382 conditions per place. [2024-05-12 10:43:14,854 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 163 selfloop transitions, 82 changer transitions 0/266 dead transitions. [2024-05-12 10:43:14,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 266 transitions, 3316 flow [2024-05-12 10:43:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 258 transitions. [2024-05-12 10:43:14,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6701298701298701 [2024-05-12 10:43:14,856 INFO L175 Difference]: Start difference. First operand has 168 places, 198 transitions, 2386 flow. Second operand 7 states and 258 transitions. [2024-05-12 10:43:14,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 266 transitions, 3316 flow [2024-05-12 10:43:15,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 266 transitions, 3194 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:15,513 INFO L231 Difference]: Finished difference. Result has 170 places, 200 transitions, 2496 flow [2024-05-12 10:43:15,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2496, PETRI_PLACES=170, PETRI_TRANSITIONS=200} [2024-05-12 10:43:15,513 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 109 predicate places. [2024-05-12 10:43:15,514 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 200 transitions, 2496 flow [2024-05-12 10:43:15,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:15,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:15,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:15,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:43:15,514 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 10:43:15,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:15,515 INFO L85 PathProgramCache]: Analyzing trace with hash 138458838, now seen corresponding path program 2 times [2024-05-12 10:43:15,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:15,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322119309] [2024-05-12 10:43:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:15,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:15,945 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 10:43:15,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:15,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322119309] [2024-05-12 10:43:15,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322119309] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:15,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:15,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:15,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346685403] [2024-05-12 10:43:15,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:15,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:15,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:15,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:15,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:16,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:43:16,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 200 transitions, 2496 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:16,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:16,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:43:16,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:18,816 INFO L124 PetriNetUnfolderBase]: 13394/20405 cut-off events. [2024-05-12 10:43:18,816 INFO L125 PetriNetUnfolderBase]: For 350341/351371 co-relation queries the response was YES. [2024-05-12 10:43:19,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119168 conditions, 20405 events. 13394/20405 cut-off events. For 350341/351371 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 147173 event pairs, 4075 based on Foata normal form. 191/20114 useless extension candidates. Maximal degree in co-relation 119087. Up to 10517 conditions per place. [2024-05-12 10:43:19,221 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 161 selfloop transitions, 83 changer transitions 0/265 dead transitions. [2024-05-12 10:43:19,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 265 transitions, 3404 flow [2024-05-12 10:43:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 256 transitions. [2024-05-12 10:43:19,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6649350649350649 [2024-05-12 10:43:19,223 INFO L175 Difference]: Start difference. First operand has 170 places, 200 transitions, 2496 flow. Second operand 7 states and 256 transitions. [2024-05-12 10:43:19,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 265 transitions, 3404 flow [2024-05-12 10:43:19,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 265 transitions, 3212 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-05-12 10:43:19,918 INFO L231 Difference]: Finished difference. Result has 173 places, 201 transitions, 2508 flow [2024-05-12 10:43:19,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2312, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2508, PETRI_PLACES=173, PETRI_TRANSITIONS=201} [2024-05-12 10:43:19,919 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 112 predicate places. [2024-05-12 10:43:19,919 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 201 transitions, 2508 flow [2024-05-12 10:43:19,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:19,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:19,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:19,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:43:19,920 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 10:43:19,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash 227024598, now seen corresponding path program 3 times [2024-05-12 10:43:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:19,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966025401] [2024-05-12 10:43:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:19,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:20,366 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 10:43:20,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966025401] [2024-05-12 10:43:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966025401] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:20,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:20,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:20,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088867945] [2024-05-12 10:43:20,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:20,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:20,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:20,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:20,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:20,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:43:20,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 201 transitions, 2508 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:20,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:20,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:43:20,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:23,335 INFO L124 PetriNetUnfolderBase]: 13596/20635 cut-off events. [2024-05-12 10:43:23,336 INFO L125 PetriNetUnfolderBase]: For 358531/359351 co-relation queries the response was YES. [2024-05-12 10:43:23,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121094 conditions, 20635 events. 13596/20635 cut-off events. For 358531/359351 co-relation queries the response was YES. Maximal size of possible extension queue 1101. Compared 149986 event pairs, 4242 based on Foata normal form. 173/20337 useless extension candidates. Maximal degree in co-relation 121012. Up to 15719 conditions per place. [2024-05-12 10:43:23,525 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 164 selfloop transitions, 71 changer transitions 0/256 dead transitions. [2024-05-12 10:43:23,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 256 transitions, 3238 flow [2024-05-12 10:43:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 248 transitions. [2024-05-12 10:43:23,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6441558441558441 [2024-05-12 10:43:23,527 INFO L175 Difference]: Start difference. First operand has 173 places, 201 transitions, 2508 flow. Second operand 7 states and 248 transitions. [2024-05-12 10:43:23,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 256 transitions, 3238 flow [2024-05-12 10:43:24,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 256 transitions, 3106 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 10:43:24,395 INFO L231 Difference]: Finished difference. Result has 176 places, 202 transitions, 2552 flow [2024-05-12 10:43:24,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2377, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2552, PETRI_PLACES=176, PETRI_TRANSITIONS=202} [2024-05-12 10:43:24,396 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 115 predicate places. [2024-05-12 10:43:24,396 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 202 transitions, 2552 flow [2024-05-12 10:43:24,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:24,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:24,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:24,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:43:24,396 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 10:43:24,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:24,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1646513178, now seen corresponding path program 4 times [2024-05-12 10:43:24,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:24,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364556947] [2024-05-12 10:43:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:24,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:24,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:24,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364556947] [2024-05-12 10:43:24,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364556947] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:24,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:24,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:24,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676244891] [2024-05-12 10:43:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:24,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:24,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:43:24,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 202 transitions, 2552 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:43:24,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:24,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:43:24,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand