./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 18:02:14,516 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 18:02:14,609 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 18:02:14,614 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 18:02:14,614 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 18:02:14,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 18:02:14,641 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 18:02:14,641 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 18:02:14,642 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 18:02:14,645 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 18:02:14,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 18:02:14,645 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 18:02:14,646 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 18:02:14,647 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 18:02:14,647 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 18:02:14,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 18:02:14,648 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 18:02:14,648 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 18:02:14,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 18:02:14,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 18:02:14,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 18:02:14,649 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 18:02:14,649 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 18:02:14,650 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 18:02:14,650 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 18:02:14,650 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 18:02:14,650 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 18:02:14,651 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 18:02:14,651 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 18:02:14,652 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 18:02:14,652 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 18:02:14,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 18:02:14,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 18:02:14,653 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 18:02:14,653 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 18:02:14,653 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 18:02:14,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 18:02:14,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 18:02:14,654 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 18:02:14,654 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 18:02:14,654 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 18:02:14,655 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 18:02:14,655 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 18:02:14,655 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 18:02:14,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 18:02:14,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 18:02:14,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 18:02:14,859 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 18:02:14,860 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 18:02:14,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 18:02:14,983 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 18:02:14,983 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 18:02:14,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-06-20 18:02:16,169 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 18:02:16,411 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 18:02:16,412 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-06-20 18:02:16,430 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/387de05e2/59939fa11090478e8f782bcb6646a1fe/FLAG933600872 [2024-06-20 18:02:16,441 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/387de05e2/59939fa11090478e8f782bcb6646a1fe [2024-06-20 18:02:16,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 18:02:16,444 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 18:02:16,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 18:02:16,447 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 18:02:16,451 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 18:02:16,452 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:02:14" (1/2) ... [2024-06-20 18:02:16,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb0faf6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 06:02:16, skipping insertion in model container [2024-06-20 18:02:16,452 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:02:14" (1/2) ... [2024-06-20 18:02:16,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41f2a7e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 06:02:16, skipping insertion in model container [2024-06-20 18:02:16,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 06:02:16" (2/2) ... [2024-06-20 18:02:16,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb0faf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:16, skipping insertion in model container [2024-06-20 18:02:16,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 06:02:16" (2/2) ... [2024-06-20 18:02:16,455 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 18:02:16,504 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 18:02:16,505 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 127) && __unbuffered_p2_EAX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 18:02:16,505 INFO L97 edCorrectnessWitness]: Location invariant before [L790-L790] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 127) && __unbuffered_p2_EAX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 18:02:16,505 INFO L97 edCorrectnessWitness]: Location invariant before [L787-L787] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 127) && __unbuffered_p2_EAX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 18:02:16,506 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 18:02:16,506 INFO L106 edCorrectnessWitness]: ghost_update [L785-L785] multithreaded = 1; [2024-06-20 18:02:16,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 18:02:16,820 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 18:02:16,827 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 18:02:16,972 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 18:02:17,016 INFO L206 MainTranslator]: Completed translation [2024-06-20 18:02:17,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17 WrapperNode [2024-06-20 18:02:17,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 18:02:17,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 18:02:17,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 18:02:17,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 18:02:17,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,039 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,068 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-20 18:02:17,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 18:02:17,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 18:02:17,070 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 18:02:17,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 18:02:17,078 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,080 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,086 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,100 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 18:02:17,106 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,107 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,124 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,126 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,127 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,129 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 18:02:17,130 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 18:02:17,130 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 18:02:17,130 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 18:02:17,131 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (1/1) ... [2024-06-20 18:02:17,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 18:02:17,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 18:02:17,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 18:02:17,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 18:02:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 18:02:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 18:02:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 18:02:17,205 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 18:02:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 18:02:17,205 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 18:02:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 18:02:17,205 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 18:02:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 18:02:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 18:02:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 18:02:17,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 18:02:17,210 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 18:02:17,406 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 18:02:17,409 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 18:02:17,662 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 18:02:17,662 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 18:02:17,770 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 18:02:17,770 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 18:02:17,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 06:02:17 BoogieIcfgContainer [2024-06-20 18:02:17,770 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 18:02:17,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 18:02:17,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 18:02:17,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 18:02:17,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:02:14" (1/4) ... [2024-06-20 18:02:17,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64665228 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 06:02:17, skipping insertion in model container [2024-06-20 18:02:17,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 06:02:16" (2/4) ... [2024-06-20 18:02:17,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64665228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 06:02:17, skipping insertion in model container [2024-06-20 18:02:17,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:02:17" (3/4) ... [2024-06-20 18:02:17,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64665228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 06:02:17, skipping insertion in model container [2024-06-20 18:02:17,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 06:02:17" (4/4) ... [2024-06-20 18:02:17,779 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-06-20 18:02:17,793 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 18:02:17,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 18:02:17,793 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 18:02:17,836 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 18:02:17,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 18:02:17,898 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-20 18:02:17,898 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 18:02:17,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 18:02:17,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 18:02:17,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-20 18:02:17,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 18:02:17,921 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;@4036b1c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 18:02:17,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 18:02:17,926 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 18:02:17,926 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 18:02:17,926 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 18:02:17,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:17,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 18:02:17,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:17,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:17,933 INFO L85 PathProgramCache]: Analyzing trace with hash 224409784, now seen corresponding path program 1 times [2024-06-20 18:02:17,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:17,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145484756] [2024-06-20 18:02:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:17,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:18,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:18,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145484756] [2024-06-20 18:02:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145484756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:18,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:18,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 18:02:18,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216193782] [2024-06-20 18:02:18,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:18,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 18:02:18,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 18:02:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 18:02:18,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-06-20 18:02:18,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:18,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:18,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-06-20 18:02:18,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:18,840 INFO L124 PetriNetUnfolderBase]: 471/886 cut-off events. [2024-06-20 18:02:18,841 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-20 18:02:18,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 886 events. 471/886 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4806 event pairs, 288 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 1662. Up to 733 conditions per place. [2024-06-20 18:02:18,853 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 27 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-20 18:02:18,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 165 flow [2024-06-20 18:02:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 18:02:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 18:02:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-06-20 18:02:18,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7286821705426356 [2024-06-20 18:02:18,866 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 94 transitions. [2024-06-20 18:02:18,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 165 flow [2024-06-20 18:02:18,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 18:02:18,872 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-20 18:02:18,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-20 18:02:18,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-20 18:02:18,878 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-20 18:02:18,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:18,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:18,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:18,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 18:02:18,879 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:18,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash 910381335, now seen corresponding path program 1 times [2024-06-20 18:02:18,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:18,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715622638] [2024-06-20 18:02:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:18,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:19,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:19,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715622638] [2024-06-20 18:02:19,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715622638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:19,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:19,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 18:02:19,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204117823] [2024-06-20 18:02:19,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:19,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 18:02:19,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 18:02:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 18:02:19,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:02:19,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:19,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:19,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:02:19,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:19,277 INFO L124 PetriNetUnfolderBase]: 737/1262 cut-off events. [2024-06-20 18:02:19,277 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2024-06-20 18:02:19,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1262 events. 737/1262 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6805 event pairs, 403 based on Foata normal form. 4/1237 useless extension candidates. Maximal degree in co-relation 2798. Up to 1096 conditions per place. [2024-06-20 18:02:19,285 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 38 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-06-20 18:02:19,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 266 flow [2024-06-20 18:02:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 18:02:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 18:02:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-20 18:02:19,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2024-06-20 18:02:19,287 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 122 transitions. [2024-06-20 18:02:19,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 266 flow [2024-06-20 18:02:19,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 18:02:19,290 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 176 flow [2024-06-20 18:02:19,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-06-20 18:02:19,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2024-06-20 18:02:19,291 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 176 flow [2024-06-20 18:02:19,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:19,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:19,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:19,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 18:02:19,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:19,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash 653072864, now seen corresponding path program 1 times [2024-06-20 18:02:19,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:19,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919438808] [2024-06-20 18:02:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:19,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:19,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:19,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919438808] [2024-06-20 18:02:19,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919438808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:19,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:19,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 18:02:19,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347557038] [2024-06-20 18:02:19,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:19,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 18:02:19,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 18:02:19,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 18:02:19,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-06-20 18:02:19,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:19,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:19,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-06-20 18:02:19,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:19,792 INFO L124 PetriNetUnfolderBase]: 640/1205 cut-off events. [2024-06-20 18:02:19,793 INFO L125 PetriNetUnfolderBase]: For 803/811 co-relation queries the response was YES. [2024-06-20 18:02:19,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3074 conditions, 1205 events. 640/1205 cut-off events. For 803/811 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6759 event pairs, 322 based on Foata normal form. 2/1175 useless extension candidates. Maximal degree in co-relation 3059. Up to 960 conditions per place. [2024-06-20 18:02:19,829 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 38 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-20 18:02:19,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 308 flow [2024-06-20 18:02:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 18:02:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 18:02:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-20 18:02:19,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802325581395349 [2024-06-20 18:02:19,834 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 176 flow. Second operand 4 states and 117 transitions. [2024-06-20 18:02:19,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 308 flow [2024-06-20 18:02:19,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 304 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 18:02:19,838 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 214 flow [2024-06-20 18:02:19,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-06-20 18:02:19,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-20 18:02:19,840 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 214 flow [2024-06-20 18:02:19,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:19,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:19,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:19,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 18:02:19,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:19,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1970035349, now seen corresponding path program 1 times [2024-06-20 18:02:19,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:19,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397335847] [2024-06-20 18:02:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:19,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:20,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:20,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397335847] [2024-06-20 18:02:20,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397335847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:20,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:20,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:02:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514170960] [2024-06-20 18:02:20,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:20,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:02:20,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:02:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:02:20,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:20,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:20,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:20,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:20,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:20,355 INFO L124 PetriNetUnfolderBase]: 940/1597 cut-off events. [2024-06-20 18:02:20,355 INFO L125 PetriNetUnfolderBase]: For 1705/1705 co-relation queries the response was YES. [2024-06-20 18:02:20,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4529 conditions, 1597 events. 940/1597 cut-off events. For 1705/1705 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8399 event pairs, 287 based on Foata normal form. 8/1601 useless extension candidates. Maximal degree in co-relation 4511. Up to 1330 conditions per place. [2024-06-20 18:02:20,365 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 54 selfloop transitions, 18 changer transitions 0/82 dead transitions. [2024-06-20 18:02:20,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 82 transitions, 464 flow [2024-06-20 18:02:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-20 18:02:20,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 18:02:20,367 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 214 flow. Second operand 6 states and 172 transitions. [2024-06-20 18:02:20,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 82 transitions, 464 flow [2024-06-20 18:02:20,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 446 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 18:02:20,370 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 284 flow [2024-06-20 18:02:20,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-20 18:02:20,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-20 18:02:20,371 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 284 flow [2024-06-20 18:02:20,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:20,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:20,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:20,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 18:02:20,372 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:20,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash 537604129, now seen corresponding path program 1 times [2024-06-20 18:02:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:20,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610110134] [2024-06-20 18:02:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:20,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:20,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:20,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610110134] [2024-06-20 18:02:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610110134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:20,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:20,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 18:02:20,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987065697] [2024-06-20 18:02:20,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:20,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 18:02:20,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 18:02:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 18:02:20,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:20,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:20,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:20,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:20,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:20,966 INFO L124 PetriNetUnfolderBase]: 966/1680 cut-off events. [2024-06-20 18:02:20,967 INFO L125 PetriNetUnfolderBase]: For 2751/2751 co-relation queries the response was YES. [2024-06-20 18:02:20,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5187 conditions, 1680 events. 966/1680 cut-off events. For 2751/2751 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9095 event pairs, 323 based on Foata normal form. 3/1677 useless extension candidates. Maximal degree in co-relation 5167. Up to 1376 conditions per place. [2024-06-20 18:02:20,978 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-06-20 18:02:20,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 610 flow [2024-06-20 18:02:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:02:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:02:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-20 18:02:20,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6790697674418604 [2024-06-20 18:02:20,979 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 284 flow. Second operand 5 states and 146 transitions. [2024-06-20 18:02:20,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 610 flow [2024-06-20 18:02:20,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 91 transitions, 564 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 18:02:20,983 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 392 flow [2024-06-20 18:02:20,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2024-06-20 18:02:20,984 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-20 18:02:20,984 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 392 flow [2024-06-20 18:02:20,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:20,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:20,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:20,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 18:02:20,985 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:20,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1396715809, now seen corresponding path program 2 times [2024-06-20 18:02:20,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:20,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408407183] [2024-06-20 18:02:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:20,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:21,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408407183] [2024-06-20 18:02:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408407183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:21,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:21,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 18:02:21,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182414474] [2024-06-20 18:02:21,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:21,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 18:02:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 18:02:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 18:02:21,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:21,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:21,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:21,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:21,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:21,463 INFO L124 PetriNetUnfolderBase]: 960/1666 cut-off events. [2024-06-20 18:02:21,463 INFO L125 PetriNetUnfolderBase]: For 4024/4024 co-relation queries the response was YES. [2024-06-20 18:02:21,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5664 conditions, 1666 events. 960/1666 cut-off events. For 4024/4024 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8984 event pairs, 323 based on Foata normal form. 3/1664 useless extension candidates. Maximal degree in co-relation 5642. Up to 1372 conditions per place. [2024-06-20 18:02:21,475 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 58 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-20 18:02:21,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 628 flow [2024-06-20 18:02:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:02:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:02:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-20 18:02:21,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6558139534883721 [2024-06-20 18:02:21,477 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 392 flow. Second operand 5 states and 141 transitions. [2024-06-20 18:02:21,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 628 flow [2024-06-20 18:02:21,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 600 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-20 18:02:21,483 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 438 flow [2024-06-20 18:02:21,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2024-06-20 18:02:21,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-20 18:02:21,484 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 438 flow [2024-06-20 18:02:21,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:21,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:21,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:21,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 18:02:21,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:21,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:21,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1781740498, now seen corresponding path program 1 times [2024-06-20 18:02:21,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:21,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705608071] [2024-06-20 18:02:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:21,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:21,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705608071] [2024-06-20 18:02:21,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705608071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:21,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:21,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 18:02:21,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616805843] [2024-06-20 18:02:21,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:21,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 18:02:21,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:21,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 18:02:21,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 18:02:21,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:02:21,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 438 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:21,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:21,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:02:21,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:21,970 INFO L124 PetriNetUnfolderBase]: 878/1545 cut-off events. [2024-06-20 18:02:21,970 INFO L125 PetriNetUnfolderBase]: For 4494/4494 co-relation queries the response was YES. [2024-06-20 18:02:21,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5409 conditions, 1545 events. 878/1545 cut-off events. For 4494/4494 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8423 event pairs, 356 based on Foata normal form. 3/1539 useless extension candidates. Maximal degree in co-relation 5383. Up to 1284 conditions per place. [2024-06-20 18:02:21,983 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 46 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-20 18:02:21,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 582 flow [2024-06-20 18:02:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 18:02:21,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 18:02:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-20 18:02:21,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-20 18:02:21,984 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 438 flow. Second operand 4 states and 112 transitions. [2024-06-20 18:02:21,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 582 flow [2024-06-20 18:02:21,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 540 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 18:02:21,990 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 439 flow [2024-06-20 18:02:21,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=439, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-20 18:02:21,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-20 18:02:21,991 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 439 flow [2024-06-20 18:02:21,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:21,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:21,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:21,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 18:02:21,992 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:21,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:21,993 INFO L85 PathProgramCache]: Analyzing trace with hash -885852928, now seen corresponding path program 1 times [2024-06-20 18:02:21,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:21,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335690780] [2024-06-20 18:02:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:21,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:22,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:22,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335690780] [2024-06-20 18:02:22,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335690780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:22,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:22,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:02:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998383475] [2024-06-20 18:02:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:22,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:02:22,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:02:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:02:22,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:22,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 439 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-20 18:02:22,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:22,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:22,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:22,558 INFO L124 PetriNetUnfolderBase]: 958/1644 cut-off events. [2024-06-20 18:02:22,559 INFO L125 PetriNetUnfolderBase]: For 5350/5350 co-relation queries the response was YES. [2024-06-20 18:02:22,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5830 conditions, 1644 events. 958/1644 cut-off events. For 5350/5350 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8748 event pairs, 339 based on Foata normal form. 3/1643 useless extension candidates. Maximal degree in co-relation 5803. Up to 1388 conditions per place. [2024-06-20 18:02:22,572 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 68 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-20 18:02:22,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 709 flow [2024-06-20 18:02:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-20 18:02:22,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6589147286821705 [2024-06-20 18:02:22,574 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 439 flow. Second operand 6 states and 170 transitions. [2024-06-20 18:02:22,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 709 flow [2024-06-20 18:02:22,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 669 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 18:02:22,582 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 486 flow [2024-06-20 18:02:22,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=486, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2024-06-20 18:02:22,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-20 18:02:22,583 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 486 flow [2024-06-20 18:02:22,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-20 18:02:22,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:22,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:22,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 18:02:22,584 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:22,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1130934468, now seen corresponding path program 2 times [2024-06-20 18:02:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:22,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029400046] [2024-06-20 18:02:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:22,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:22,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029400046] [2024-06-20 18:02:22,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029400046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:22,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:22,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:02:22,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034945907] [2024-06-20 18:02:22,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:22,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:02:22,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:02:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:02:22,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:22,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 486 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-20 18:02:22,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:22,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:22,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:23,094 INFO L124 PetriNetUnfolderBase]: 982/1712 cut-off events. [2024-06-20 18:02:23,095 INFO L125 PetriNetUnfolderBase]: For 6735/6735 co-relation queries the response was YES. [2024-06-20 18:02:23,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6462 conditions, 1712 events. 982/1712 cut-off events. For 6735/6735 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9294 event pairs, 310 based on Foata normal form. 3/1707 useless extension candidates. Maximal degree in co-relation 6435. Up to 1332 conditions per place. [2024-06-20 18:02:23,107 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 39 changer transitions 0/111 dead transitions. [2024-06-20 18:02:23,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 111 transitions, 894 flow [2024-06-20 18:02:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-20 18:02:23,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6744186046511628 [2024-06-20 18:02:23,109 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 486 flow. Second operand 6 states and 174 transitions. [2024-06-20 18:02:23,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 111 transitions, 894 flow [2024-06-20 18:02:23,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 837 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 18:02:23,118 INFO L231 Difference]: Finished difference. Result has 71 places, 85 transitions, 618 flow [2024-06-20 18:02:23,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=71, PETRI_TRANSITIONS=85} [2024-06-20 18:02:23,119 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-20 18:02:23,119 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 85 transitions, 618 flow [2024-06-20 18:02:23,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-20 18:02:23,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:23,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:23,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 18:02:23,120 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:23,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -641842626, now seen corresponding path program 1 times [2024-06-20 18:02:23,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:23,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256823496] [2024-06-20 18:02:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:23,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:23,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:23,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256823496] [2024-06-20 18:02:23,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256823496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:23,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:23,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:23,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805179418] [2024-06-20 18:02:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:23,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:23,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:23,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:23,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:23,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:23,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 85 transitions, 618 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:23,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:23,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:23,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:23,685 INFO L124 PetriNetUnfolderBase]: 1006/1751 cut-off events. [2024-06-20 18:02:23,685 INFO L125 PetriNetUnfolderBase]: For 8799/8799 co-relation queries the response was YES. [2024-06-20 18:02:23,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7066 conditions, 1751 events. 1006/1751 cut-off events. For 8799/8799 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9539 event pairs, 303 based on Foata normal form. 3/1748 useless extension candidates. Maximal degree in co-relation 7038. Up to 1381 conditions per place. [2024-06-20 18:02:23,697 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 86 selfloop transitions, 36 changer transitions 0/132 dead transitions. [2024-06-20 18:02:23,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 132 transitions, 1122 flow [2024-06-20 18:02:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:02:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:02:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-20 18:02:23,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6482558139534884 [2024-06-20 18:02:23,699 INFO L175 Difference]: Start difference. First operand has 71 places, 85 transitions, 618 flow. Second operand 8 states and 223 transitions. [2024-06-20 18:02:23,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 132 transitions, 1122 flow [2024-06-20 18:02:23,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 132 transitions, 1084 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-20 18:02:23,708 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 782 flow [2024-06-20 18:02:23,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=782, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2024-06-20 18:02:23,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-20 18:02:23,709 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 782 flow [2024-06-20 18:02:23,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:23,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:23,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:23,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 18:02:23,710 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:23,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2080825024, now seen corresponding path program 3 times [2024-06-20 18:02:23,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:23,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582623754] [2024-06-20 18:02:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:23,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:23,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:23,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582623754] [2024-06-20 18:02:23,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582623754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:23,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:23,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:02:23,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299532744] [2024-06-20 18:02:23,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:23,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:02:23,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:02:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:02:23,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:23,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 782 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-20 18:02:23,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:23,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:23,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:24,220 INFO L124 PetriNetUnfolderBase]: 1000/1726 cut-off events. [2024-06-20 18:02:24,221 INFO L125 PetriNetUnfolderBase]: For 11177/11177 co-relation queries the response was YES. [2024-06-20 18:02:24,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7583 conditions, 1726 events. 1000/1726 cut-off events. For 11177/11177 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9348 event pairs, 303 based on Foata normal form. 3/1721 useless extension candidates. Maximal degree in co-relation 7551. Up to 1362 conditions per place. [2024-06-20 18:02:24,233 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 35 changer transitions 0/118 dead transitions. [2024-06-20 18:02:24,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 118 transitions, 1072 flow [2024-06-20 18:02:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 18:02:24,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472868217054264 [2024-06-20 18:02:24,234 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 782 flow. Second operand 6 states and 167 transitions. [2024-06-20 18:02:24,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 118 transitions, 1072 flow [2024-06-20 18:02:24,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 972 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 18:02:24,246 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 761 flow [2024-06-20 18:02:24,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=761, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-20 18:02:24,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-20 18:02:24,247 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 761 flow [2024-06-20 18:02:24,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-20 18:02:24,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:24,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:24,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 18:02:24,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:24,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:24,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1469446718, now seen corresponding path program 2 times [2024-06-20 18:02:24,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:24,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341518774] [2024-06-20 18:02:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:24,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:24,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:24,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341518774] [2024-06-20 18:02:24,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341518774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:24,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:24,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:24,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969645904] [2024-06-20 18:02:24,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:24,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:24,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:24,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:24,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:24,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:24,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 761 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:24,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:24,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:24,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:24,831 INFO L124 PetriNetUnfolderBase]: 1018/1765 cut-off events. [2024-06-20 18:02:24,832 INFO L125 PetriNetUnfolderBase]: For 12422/12422 co-relation queries the response was YES. [2024-06-20 18:02:24,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7856 conditions, 1765 events. 1018/1765 cut-off events. For 12422/12422 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9612 event pairs, 297 based on Foata normal form. 3/1763 useless extension candidates. Maximal degree in co-relation 7822. Up to 1392 conditions per place. [2024-06-20 18:02:24,844 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 86 selfloop transitions, 37 changer transitions 0/133 dead transitions. [2024-06-20 18:02:24,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 1206 flow [2024-06-20 18:02:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:02:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:02:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-20 18:02:24,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366279069767442 [2024-06-20 18:02:24,846 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 761 flow. Second operand 8 states and 219 transitions. [2024-06-20 18:02:24,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 1206 flow [2024-06-20 18:02:24,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 133 transitions, 1129 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 18:02:24,860 INFO L231 Difference]: Finished difference. Result has 86 places, 101 transitions, 800 flow [2024-06-20 18:02:24,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=800, PETRI_PLACES=86, PETRI_TRANSITIONS=101} [2024-06-20 18:02:24,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-20 18:02:24,861 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 101 transitions, 800 flow [2024-06-20 18:02:24,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:24,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:24,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:24,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 18:02:24,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:24,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:24,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1560954776, now seen corresponding path program 3 times [2024-06-20 18:02:24,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:24,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081578089] [2024-06-20 18:02:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:24,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:25,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:25,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081578089] [2024-06-20 18:02:25,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081578089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:25,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:25,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632355069] [2024-06-20 18:02:25,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:25,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:25,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:25,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 101 transitions, 800 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:25,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:25,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:25,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:25,459 INFO L124 PetriNetUnfolderBase]: 1059/1852 cut-off events. [2024-06-20 18:02:25,460 INFO L125 PetriNetUnfolderBase]: For 14170/14170 co-relation queries the response was YES. [2024-06-20 18:02:25,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8416 conditions, 1852 events. 1059/1852 cut-off events. For 14170/14170 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10261 event pairs, 301 based on Foata normal form. 3/1854 useless extension candidates. Maximal degree in co-relation 8381. Up to 1530 conditions per place. [2024-06-20 18:02:25,473 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 99 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-06-20 18:02:25,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1267 flow [2024-06-20 18:02:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 18:02:25,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-20 18:02:25,475 INFO L175 Difference]: Start difference. First operand has 86 places, 101 transitions, 800 flow. Second operand 6 states and 161 transitions. [2024-06-20 18:02:25,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1267 flow [2024-06-20 18:02:25,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 133 transitions, 1147 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 18:02:25,492 INFO L231 Difference]: Finished difference. Result has 87 places, 115 transitions, 927 flow [2024-06-20 18:02:25,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=927, PETRI_PLACES=87, PETRI_TRANSITIONS=115} [2024-06-20 18:02:25,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-20 18:02:25,493 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 115 transitions, 927 flow [2024-06-20 18:02:25,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:25,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:25,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:25,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 18:02:25,494 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:25,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1478028510, now seen corresponding path program 1 times [2024-06-20 18:02:25,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:25,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761661636] [2024-06-20 18:02:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:25,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:25,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:25,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761661636] [2024-06-20 18:02:25,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761661636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:25,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:25,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:25,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960652025] [2024-06-20 18:02:25,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:25,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:25,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:25,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:25,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:25,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:02:25,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 115 transitions, 927 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:25,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:25,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:02:25,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:26,062 INFO L124 PetriNetUnfolderBase]: 997/1783 cut-off events. [2024-06-20 18:02:26,062 INFO L125 PetriNetUnfolderBase]: For 15364/15364 co-relation queries the response was YES. [2024-06-20 18:02:26,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8182 conditions, 1783 events. 997/1783 cut-off events. For 15364/15364 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10056 event pairs, 289 based on Foata normal form. 4/1786 useless extension candidates. Maximal degree in co-relation 8145. Up to 1375 conditions per place. [2024-06-20 18:02:26,077 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 93 selfloop transitions, 10 changer transitions 0/134 dead transitions. [2024-06-20 18:02:26,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 134 transitions, 1216 flow [2024-06-20 18:02:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:02:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:02:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-20 18:02:26,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6465116279069767 [2024-06-20 18:02:26,079 INFO L175 Difference]: Start difference. First operand has 87 places, 115 transitions, 927 flow. Second operand 5 states and 139 transitions. [2024-06-20 18:02:26,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 134 transitions, 1216 flow [2024-06-20 18:02:26,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 134 transitions, 1175 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 18:02:26,104 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 947 flow [2024-06-20 18:02:26,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=947, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-20 18:02:26,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-20 18:02:26,106 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 947 flow [2024-06-20 18:02:26,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:26,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:26,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:26,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 18:02:26,107 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:26,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:26,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1916761545, now seen corresponding path program 1 times [2024-06-20 18:02:26,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:26,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374007465] [2024-06-20 18:02:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:26,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:26,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:26,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374007465] [2024-06-20 18:02:26,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374007465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:26,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:26,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 18:02:26,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740216541] [2024-06-20 18:02:26,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:26,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 18:02:26,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 18:02:26,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 18:02:26,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:26,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 947 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:26,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:26,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:26,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:26,675 INFO L124 PetriNetUnfolderBase]: 1048/1835 cut-off events. [2024-06-20 18:02:26,675 INFO L125 PetriNetUnfolderBase]: For 16980/16980 co-relation queries the response was YES. [2024-06-20 18:02:26,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8541 conditions, 1835 events. 1048/1835 cut-off events. For 16980/16980 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10174 event pairs, 320 based on Foata normal form. 3/1833 useless extension candidates. Maximal degree in co-relation 8503. Up to 1496 conditions per place. [2024-06-20 18:02:26,687 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 94 selfloop transitions, 30 changer transitions 0/134 dead transitions. [2024-06-20 18:02:26,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 134 transitions, 1299 flow [2024-06-20 18:02:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:02:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:02:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-20 18:02:26,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6325581395348837 [2024-06-20 18:02:26,689 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 947 flow. Second operand 5 states and 136 transitions. [2024-06-20 18:02:26,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 134 transitions, 1299 flow [2024-06-20 18:02:26,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 1254 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 18:02:26,707 INFO L231 Difference]: Finished difference. Result has 92 places, 121 transitions, 1039 flow [2024-06-20 18:02:26,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1039, PETRI_PLACES=92, PETRI_TRANSITIONS=121} [2024-06-20 18:02:26,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-20 18:02:26,708 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 121 transitions, 1039 flow [2024-06-20 18:02:26,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:26,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:26,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:26,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 18:02:26,709 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:26,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:26,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1439381741, now seen corresponding path program 2 times [2024-06-20 18:02:26,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:26,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556248700] [2024-06-20 18:02:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:26,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:26,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:26,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556248700] [2024-06-20 18:02:26,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556248700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:26,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:26,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 18:02:26,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781865631] [2024-06-20 18:02:26,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:26,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 18:02:26,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:26,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 18:02:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 18:02:27,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:27,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 121 transitions, 1039 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:27,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:27,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:27,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:27,202 INFO L124 PetriNetUnfolderBase]: 1036/1806 cut-off events. [2024-06-20 18:02:27,202 INFO L125 PetriNetUnfolderBase]: For 18497/18497 co-relation queries the response was YES. [2024-06-20 18:02:27,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8587 conditions, 1806 events. 1036/1806 cut-off events. For 18497/18497 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9993 event pairs, 333 based on Foata normal form. 2/1803 useless extension candidates. Maximal degree in co-relation 8547. Up to 1482 conditions per place. [2024-06-20 18:02:27,217 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 88 selfloop transitions, 33 changer transitions 0/131 dead transitions. [2024-06-20 18:02:27,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 131 transitions, 1319 flow [2024-06-20 18:02:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:02:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:02:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-20 18:02:27,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186046511627907 [2024-06-20 18:02:27,219 INFO L175 Difference]: Start difference. First operand has 92 places, 121 transitions, 1039 flow. Second operand 5 states and 133 transitions. [2024-06-20 18:02:27,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 131 transitions, 1319 flow [2024-06-20 18:02:27,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1275 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 18:02:27,240 INFO L231 Difference]: Finished difference. Result has 95 places, 122 transitions, 1084 flow [2024-06-20 18:02:27,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1084, PETRI_PLACES=95, PETRI_TRANSITIONS=122} [2024-06-20 18:02:27,241 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-20 18:02:27,241 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 122 transitions, 1084 flow [2024-06-20 18:02:27,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:27,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:27,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:27,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 18:02:27,245 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:27,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:27,245 INFO L85 PathProgramCache]: Analyzing trace with hash 694913579, now seen corresponding path program 1 times [2024-06-20 18:02:27,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:27,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262284172] [2024-06-20 18:02:27,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:27,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:27,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262284172] [2024-06-20 18:02:27,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262284172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:27,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:27,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 18:02:27,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571953872] [2024-06-20 18:02:27,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:27,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 18:02:27,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:27,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 18:02:27,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 18:02:27,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:02:27,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 122 transitions, 1084 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:27,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:27,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:02:27,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:27,761 INFO L124 PetriNetUnfolderBase]: 981/1750 cut-off events. [2024-06-20 18:02:27,761 INFO L125 PetriNetUnfolderBase]: For 19799/19799 co-relation queries the response was YES. [2024-06-20 18:02:27,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8378 conditions, 1750 events. 981/1750 cut-off events. For 19799/19799 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9866 event pairs, 317 based on Foata normal form. 3/1743 useless extension candidates. Maximal degree in co-relation 8337. Up to 1371 conditions per place. [2024-06-20 18:02:27,774 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 93 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-06-20 18:02:27,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 139 transitions, 1418 flow [2024-06-20 18:02:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:02:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:02:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-20 18:02:27,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2024-06-20 18:02:27,775 INFO L175 Difference]: Start difference. First operand has 95 places, 122 transitions, 1084 flow. Second operand 5 states and 137 transitions. [2024-06-20 18:02:27,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 139 transitions, 1418 flow [2024-06-20 18:02:27,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 139 transitions, 1382 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-20 18:02:27,800 INFO L231 Difference]: Finished difference. Result has 99 places, 129 transitions, 1156 flow [2024-06-20 18:02:27,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1156, PETRI_PLACES=99, PETRI_TRANSITIONS=129} [2024-06-20 18:02:27,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-20 18:02:27,801 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 129 transitions, 1156 flow [2024-06-20 18:02:27,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:27,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:27,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:27,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 18:02:27,801 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:27,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1014175875, now seen corresponding path program 1 times [2024-06-20 18:02:27,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:27,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778467203] [2024-06-20 18:02:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:27,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:28,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:28,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778467203] [2024-06-20 18:02:28,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778467203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:28,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:28,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:28,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254902105] [2024-06-20 18:02:28,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:28,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:28,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:28,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:28,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:28,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:28,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 129 transitions, 1156 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:28,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:28,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:28,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:28,451 INFO L124 PetriNetUnfolderBase]: 1106/1905 cut-off events. [2024-06-20 18:02:28,452 INFO L125 PetriNetUnfolderBase]: For 24381/24381 co-relation queries the response was YES. [2024-06-20 18:02:28,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9604 conditions, 1905 events. 1106/1905 cut-off events. For 24381/24381 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10568 event pairs, 203 based on Foata normal form. 6/1907 useless extension candidates. Maximal degree in co-relation 9561. Up to 1505 conditions per place. [2024-06-20 18:02:28,467 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 30 changer transitions 0/172 dead transitions. [2024-06-20 18:02:28,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 172 transitions, 1716 flow [2024-06-20 18:02:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:02:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:02:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-20 18:02:28,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6482558139534884 [2024-06-20 18:02:28,468 INFO L175 Difference]: Start difference. First operand has 99 places, 129 transitions, 1156 flow. Second operand 8 states and 223 transitions. [2024-06-20 18:02:28,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 172 transitions, 1716 flow [2024-06-20 18:02:28,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 172 transitions, 1683 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-20 18:02:28,498 INFO L231 Difference]: Finished difference. Result has 106 places, 135 transitions, 1281 flow [2024-06-20 18:02:28,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1281, PETRI_PLACES=106, PETRI_TRANSITIONS=135} [2024-06-20 18:02:28,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-20 18:02:28,499 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 135 transitions, 1281 flow [2024-06-20 18:02:28,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:28,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:28,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:28,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 18:02:28,499 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:28,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash 30643589, now seen corresponding path program 2 times [2024-06-20 18:02:28,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:28,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522519370] [2024-06-20 18:02:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:28,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:28,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:28,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522519370] [2024-06-20 18:02:28,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522519370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:28,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:28,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:28,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776376950] [2024-06-20 18:02:28,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:28,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:28,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:28,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:28,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 135 transitions, 1281 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:28,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:28,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:28,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:29,140 INFO L124 PetriNetUnfolderBase]: 1093/1886 cut-off events. [2024-06-20 18:02:29,140 INFO L125 PetriNetUnfolderBase]: For 26722/26722 co-relation queries the response was YES. [2024-06-20 18:02:29,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9840 conditions, 1886 events. 1093/1886 cut-off events. For 26722/26722 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10450 event pairs, 288 based on Foata normal form. 6/1888 useless extension candidates. Maximal degree in co-relation 9794. Up to 1562 conditions per place. [2024-06-20 18:02:29,154 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 131 selfloop transitions, 24 changer transitions 0/165 dead transitions. [2024-06-20 18:02:29,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 1667 flow [2024-06-20 18:02:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:02:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:02:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-20 18:02:29,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478405315614618 [2024-06-20 18:02:29,155 INFO L175 Difference]: Start difference. First operand has 106 places, 135 transitions, 1281 flow. Second operand 7 states and 195 transitions. [2024-06-20 18:02:29,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 1667 flow [2024-06-20 18:02:29,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1572 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 18:02:29,183 INFO L231 Difference]: Finished difference. Result has 109 places, 135 transitions, 1242 flow [2024-06-20 18:02:29,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1242, PETRI_PLACES=109, PETRI_TRANSITIONS=135} [2024-06-20 18:02:29,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-20 18:02:29,184 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 135 transitions, 1242 flow [2024-06-20 18:02:29,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:29,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:29,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 18:02:29,185 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:29,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1376976669, now seen corresponding path program 1 times [2024-06-20 18:02:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:29,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42234711] [2024-06-20 18:02:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:29,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:29,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42234711] [2024-06-20 18:02:29,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42234711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:29,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:29,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:29,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133336980] [2024-06-20 18:02:29,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:29,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:29,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:29,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:29,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:29,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:29,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 135 transitions, 1242 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:29,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:29,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:29,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:29,813 INFO L124 PetriNetUnfolderBase]: 1109/1914 cut-off events. [2024-06-20 18:02:29,813 INFO L125 PetriNetUnfolderBase]: For 28420/28420 co-relation queries the response was YES. [2024-06-20 18:02:29,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10000 conditions, 1914 events. 1109/1914 cut-off events. For 28420/28420 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10613 event pairs, 273 based on Foata normal form. 3/1913 useless extension candidates. Maximal degree in co-relation 9952. Up to 1597 conditions per place. [2024-06-20 18:02:29,827 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 133 selfloop transitions, 25 changer transitions 0/168 dead transitions. [2024-06-20 18:02:29,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 168 transitions, 1686 flow [2024-06-20 18:02:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:02:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:02:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-20 18:02:29,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478405315614618 [2024-06-20 18:02:29,829 INFO L175 Difference]: Start difference. First operand has 109 places, 135 transitions, 1242 flow. Second operand 7 states and 195 transitions. [2024-06-20 18:02:29,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 168 transitions, 1686 flow [2024-06-20 18:02:29,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 168 transitions, 1630 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 18:02:29,862 INFO L231 Difference]: Finished difference. Result has 110 places, 139 transitions, 1307 flow [2024-06-20 18:02:29,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=110, PETRI_TRANSITIONS=139} [2024-06-20 18:02:29,862 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-20 18:02:29,862 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 139 transitions, 1307 flow [2024-06-20 18:02:29,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:29,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:29,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:29,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 18:02:29,863 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:29,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:29,863 INFO L85 PathProgramCache]: Analyzing trace with hash 370673187, now seen corresponding path program 3 times [2024-06-20 18:02:29,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:29,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102781013] [2024-06-20 18:02:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:29,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:30,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:30,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102781013] [2024-06-20 18:02:30,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102781013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:30,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:30,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:30,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703249166] [2024-06-20 18:02:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:30,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:30,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:30,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:30,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 139 transitions, 1307 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:30,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:30,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:30,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:30,385 INFO L124 PetriNetUnfolderBase]: 1134/1946 cut-off events. [2024-06-20 18:02:30,385 INFO L125 PetriNetUnfolderBase]: For 32318/32318 co-relation queries the response was YES. [2024-06-20 18:02:30,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10564 conditions, 1946 events. 1134/1946 cut-off events. For 32318/32318 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10777 event pairs, 282 based on Foata normal form. 6/1943 useless extension candidates. Maximal degree in co-relation 10515. Up to 1531 conditions per place. [2024-06-20 18:02:30,400 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 110 selfloop transitions, 50 changer transitions 0/170 dead transitions. [2024-06-20 18:02:30,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 170 transitions, 1789 flow [2024-06-20 18:02:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:02:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:02:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-20 18:02:30,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654485049833887 [2024-06-20 18:02:30,402 INFO L175 Difference]: Start difference. First operand has 110 places, 139 transitions, 1307 flow. Second operand 7 states and 197 transitions. [2024-06-20 18:02:30,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 170 transitions, 1789 flow [2024-06-20 18:02:30,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 170 transitions, 1698 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 18:02:30,436 INFO L231 Difference]: Finished difference. Result has 112 places, 142 transitions, 1382 flow [2024-06-20 18:02:30,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1382, PETRI_PLACES=112, PETRI_TRANSITIONS=142} [2024-06-20 18:02:30,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-20 18:02:30,436 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 142 transitions, 1382 flow [2024-06-20 18:02:30,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:30,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:30,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:30,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 18:02:30,437 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:30,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash -882237505, now seen corresponding path program 2 times [2024-06-20 18:02:30,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:30,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727381108] [2024-06-20 18:02:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:30,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:30,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:30,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727381108] [2024-06-20 18:02:30,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727381108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:30,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:30,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386152424] [2024-06-20 18:02:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:30,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:30,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:30,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:30,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 142 transitions, 1382 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:30,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:30,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:30,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:31,022 INFO L124 PetriNetUnfolderBase]: 1182/2032 cut-off events. [2024-06-20 18:02:31,022 INFO L125 PetriNetUnfolderBase]: For 36710/36710 co-relation queries the response was YES. [2024-06-20 18:02:31,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11421 conditions, 2032 events. 1182/2032 cut-off events. For 36710/36710 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11412 event pairs, 278 based on Foata normal form. 3/2026 useless extension candidates. Maximal degree in co-relation 11371. Up to 1451 conditions per place. [2024-06-20 18:02:31,035 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 109 selfloop transitions, 86 changer transitions 0/205 dead transitions. [2024-06-20 18:02:31,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 205 transitions, 2364 flow [2024-06-20 18:02:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:02:31,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:02:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 306 transitions. [2024-06-20 18:02:31,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6469344608879493 [2024-06-20 18:02:31,037 INFO L175 Difference]: Start difference. First operand has 112 places, 142 transitions, 1382 flow. Second operand 11 states and 306 transitions. [2024-06-20 18:02:31,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 205 transitions, 2364 flow [2024-06-20 18:02:31,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 205 transitions, 2222 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 18:02:31,070 INFO L231 Difference]: Finished difference. Result has 118 places, 157 transitions, 1667 flow [2024-06-20 18:02:31,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1667, PETRI_PLACES=118, PETRI_TRANSITIONS=157} [2024-06-20 18:02:31,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-20 18:02:31,070 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 157 transitions, 1667 flow [2024-06-20 18:02:31,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:31,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:31,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:31,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 18:02:31,071 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:31,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash 377344387, now seen corresponding path program 3 times [2024-06-20 18:02:31,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:31,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231940986] [2024-06-20 18:02:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:31,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231940986] [2024-06-20 18:02:31,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231940986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:31,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:31,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:31,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733933829] [2024-06-20 18:02:31,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:31,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:31,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:31,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:31,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:31,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:31,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 157 transitions, 1667 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:31,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:31,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:31,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:31,609 INFO L124 PetriNetUnfolderBase]: 1174/2021 cut-off events. [2024-06-20 18:02:31,616 INFO L125 PetriNetUnfolderBase]: For 39559/39559 co-relation queries the response was YES. [2024-06-20 18:02:31,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11679 conditions, 2021 events. 1174/2021 cut-off events. For 39559/39559 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11354 event pairs, 278 based on Foata normal form. 3/2015 useless extension candidates. Maximal degree in co-relation 11628. Up to 1444 conditions per place. [2024-06-20 18:02:31,630 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 85 changer transitions 0/195 dead transitions. [2024-06-20 18:02:31,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 195 transitions, 2299 flow [2024-06-20 18:02:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:02:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:02:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-20 18:02:31,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6563307493540051 [2024-06-20 18:02:31,632 INFO L175 Difference]: Start difference. First operand has 118 places, 157 transitions, 1667 flow. Second operand 9 states and 254 transitions. [2024-06-20 18:02:31,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 195 transitions, 2299 flow [2024-06-20 18:02:31,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 195 transitions, 2077 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-20 18:02:31,675 INFO L231 Difference]: Finished difference. Result has 122 places, 157 transitions, 1624 flow [2024-06-20 18:02:31,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1624, PETRI_PLACES=122, PETRI_TRANSITIONS=157} [2024-06-20 18:02:31,676 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-20 18:02:31,676 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 157 transitions, 1624 flow [2024-06-20 18:02:31,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:31,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:31,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:31,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 18:02:31,677 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:31,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash 377353315, now seen corresponding path program 1 times [2024-06-20 18:02:31,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:31,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173894512] [2024-06-20 18:02:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:31,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:31,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173894512] [2024-06-20 18:02:31,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173894512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:31,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:31,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:31,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323998741] [2024-06-20 18:02:31,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:31,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:31,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:31,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:31,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:31,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 157 transitions, 1624 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:31,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:31,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:31,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:32,325 INFO L124 PetriNetUnfolderBase]: 1199/2053 cut-off events. [2024-06-20 18:02:32,326 INFO L125 PetriNetUnfolderBase]: For 42918/42918 co-relation queries the response was YES. [2024-06-20 18:02:32,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12032 conditions, 2053 events. 1199/2053 cut-off events. For 42918/42918 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11518 event pairs, 274 based on Foata normal form. 6/2050 useless extension candidates. Maximal degree in co-relation 11979. Up to 1625 conditions per place. [2024-06-20 18:02:32,341 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 126 selfloop transitions, 61 changer transitions 0/197 dead transitions. [2024-06-20 18:02:32,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 197 transitions, 2238 flow [2024-06-20 18:02:32,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:02:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:02:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-20 18:02:32,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6356589147286822 [2024-06-20 18:02:32,343 INFO L175 Difference]: Start difference. First operand has 122 places, 157 transitions, 1624 flow. Second operand 9 states and 246 transitions. [2024-06-20 18:02:32,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 197 transitions, 2238 flow [2024-06-20 18:02:32,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 197 transitions, 2068 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 18:02:32,379 INFO L231 Difference]: Finished difference. Result has 123 places, 160 transitions, 1646 flow [2024-06-20 18:02:32,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1646, PETRI_PLACES=123, PETRI_TRANSITIONS=160} [2024-06-20 18:02:32,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-20 18:02:32,380 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 160 transitions, 1646 flow [2024-06-20 18:02:32,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:32,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:32,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:32,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 18:02:32,380 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:32,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:32,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1781960031, now seen corresponding path program 4 times [2024-06-20 18:02:32,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:32,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393144622] [2024-06-20 18:02:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:32,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:32,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393144622] [2024-06-20 18:02:32,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393144622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:32,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:32,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:32,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278890575] [2024-06-20 18:02:32,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:32,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:32,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:32,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:32,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 160 transitions, 1646 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:32,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:32,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:32,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:32,898 INFO L124 PetriNetUnfolderBase]: 1199/2075 cut-off events. [2024-06-20 18:02:32,899 INFO L125 PetriNetUnfolderBase]: For 44335/44335 co-relation queries the response was YES. [2024-06-20 18:02:32,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12183 conditions, 2075 events. 1199/2075 cut-off events. For 44335/44335 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11672 event pairs, 279 based on Foata normal form. 6/2073 useless extension candidates. Maximal degree in co-relation 12129. Up to 1627 conditions per place. [2024-06-20 18:02:32,914 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 131 selfloop transitions, 47 changer transitions 0/188 dead transitions. [2024-06-20 18:02:32,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 188 transitions, 2178 flow [2024-06-20 18:02:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:02:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:02:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-20 18:02:32,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2024-06-20 18:02:32,915 INFO L175 Difference]: Start difference. First operand has 123 places, 160 transitions, 1646 flow. Second operand 7 states and 192 transitions. [2024-06-20 18:02:32,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 188 transitions, 2178 flow [2024-06-20 18:02:32,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 188 transitions, 2010 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 18:02:32,955 INFO L231 Difference]: Finished difference. Result has 123 places, 163 transitions, 1652 flow [2024-06-20 18:02:32,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1652, PETRI_PLACES=123, PETRI_TRANSITIONS=163} [2024-06-20 18:02:32,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-20 18:02:32,956 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 163 transitions, 1652 flow [2024-06-20 18:02:32,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:32,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:32,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:32,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 18:02:32,957 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:32,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:32,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1544316993, now seen corresponding path program 4 times [2024-06-20 18:02:32,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:32,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221044469] [2024-06-20 18:02:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:32,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:33,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:33,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221044469] [2024-06-20 18:02:33,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221044469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:33,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:33,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:33,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94756020] [2024-06-20 18:02:33,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:33,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:33,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:33,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:33,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:33,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 163 transitions, 1652 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:33,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:33,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:33,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:33,561 INFO L124 PetriNetUnfolderBase]: 1239/2148 cut-off events. [2024-06-20 18:02:33,561 INFO L125 PetriNetUnfolderBase]: For 47851/47851 co-relation queries the response was YES. [2024-06-20 18:02:33,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12688 conditions, 2148 events. 1239/2148 cut-off events. For 47851/47851 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12218 event pairs, 274 based on Foata normal form. 3/2143 useless extension candidates. Maximal degree in co-relation 12633. Up to 1522 conditions per place. [2024-06-20 18:02:33,578 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 113 selfloop transitions, 85 changer transitions 0/208 dead transitions. [2024-06-20 18:02:33,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 208 transitions, 2530 flow [2024-06-20 18:02:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:02:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:02:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2024-06-20 18:02:33,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-20 18:02:33,580 INFO L175 Difference]: Start difference. First operand has 123 places, 163 transitions, 1652 flow. Second operand 9 states and 252 transitions. [2024-06-20 18:02:33,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 208 transitions, 2530 flow [2024-06-20 18:02:33,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 208 transitions, 2380 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 18:02:33,624 INFO L231 Difference]: Finished difference. Result has 127 places, 171 transitions, 1789 flow [2024-06-20 18:02:33,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1789, PETRI_PLACES=127, PETRI_TRANSITIONS=171} [2024-06-20 18:02:33,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-20 18:02:33,626 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 171 transitions, 1789 flow [2024-06-20 18:02:33,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:33,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:33,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 18:02:33,627 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:33,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:33,627 INFO L85 PathProgramCache]: Analyzing trace with hash -912564451, now seen corresponding path program 5 times [2024-06-20 18:02:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:33,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308880402] [2024-06-20 18:02:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:33,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308880402] [2024-06-20 18:02:33,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308880402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:33,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:33,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:33,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931706693] [2024-06-20 18:02:33,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:33,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:33,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:33,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:33,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 171 transitions, 1789 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:33,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:33,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:33,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:34,275 INFO L124 PetriNetUnfolderBase]: 1231/2137 cut-off events. [2024-06-20 18:02:34,275 INFO L125 PetriNetUnfolderBase]: For 49494/49494 co-relation queries the response was YES. [2024-06-20 18:02:34,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12708 conditions, 2137 events. 1231/2137 cut-off events. For 49494/49494 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12123 event pairs, 274 based on Foata normal form. 3/2132 useless extension candidates. Maximal degree in co-relation 12652. Up to 1515 conditions per place. [2024-06-20 18:02:34,292 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 112 selfloop transitions, 89 changer transitions 0/211 dead transitions. [2024-06-20 18:02:34,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 211 transitions, 2541 flow [2024-06-20 18:02:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:02:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:02:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-20 18:02:34,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6348837209302326 [2024-06-20 18:02:34,294 INFO L175 Difference]: Start difference. First operand has 127 places, 171 transitions, 1789 flow. Second operand 10 states and 273 transitions. [2024-06-20 18:02:34,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 211 transitions, 2541 flow [2024-06-20 18:02:34,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 211 transitions, 2303 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 18:02:34,412 INFO L231 Difference]: Finished difference. Result has 131 places, 171 transitions, 1738 flow [2024-06-20 18:02:34,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1738, PETRI_PLACES=131, PETRI_TRANSITIONS=171} [2024-06-20 18:02:34,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-20 18:02:34,412 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 171 transitions, 1738 flow [2024-06-20 18:02:34,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:34,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:34,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:34,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 18:02:34,413 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:34,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:34,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1259217123, now seen corresponding path program 6 times [2024-06-20 18:02:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:34,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104544725] [2024-06-20 18:02:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:34,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:34,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:34,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104544725] [2024-06-20 18:02:34,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104544725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:34,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:34,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:34,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276732703] [2024-06-20 18:02:34,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:34,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:34,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:34,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:34,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:34,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:34,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 171 transitions, 1738 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:34,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:34,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:34,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:35,121 INFO L124 PetriNetUnfolderBase]: 1254/2189 cut-off events. [2024-06-20 18:02:35,121 INFO L125 PetriNetUnfolderBase]: For 52159/52159 co-relation queries the response was YES. [2024-06-20 18:02:35,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12985 conditions, 2189 events. 1254/2189 cut-off events. For 52159/52159 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12474 event pairs, 260 based on Foata normal form. 3/2191 useless extension candidates. Maximal degree in co-relation 12928. Up to 1786 conditions per place. [2024-06-20 18:02:35,136 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 157 selfloop transitions, 37 changer transitions 0/204 dead transitions. [2024-06-20 18:02:35,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 204 transitions, 2371 flow [2024-06-20 18:02:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:02:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:02:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 18:02:35,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245847176079734 [2024-06-20 18:02:35,137 INFO L175 Difference]: Start difference. First operand has 131 places, 171 transitions, 1738 flow. Second operand 7 states and 188 transitions. [2024-06-20 18:02:35,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 204 transitions, 2371 flow [2024-06-20 18:02:35,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 204 transitions, 2161 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 18:02:35,193 INFO L231 Difference]: Finished difference. Result has 131 places, 183 transitions, 1797 flow [2024-06-20 18:02:35,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1797, PETRI_PLACES=131, PETRI_TRANSITIONS=183} [2024-06-20 18:02:35,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-20 18:02:35,194 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 183 transitions, 1797 flow [2024-06-20 18:02:35,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:35,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:35,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:35,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 18:02:35,194 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:35,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:35,195 INFO L85 PathProgramCache]: Analyzing trace with hash -905889283, now seen corresponding path program 2 times [2024-06-20 18:02:35,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:35,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201629765] [2024-06-20 18:02:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:35,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:35,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:35,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201629765] [2024-06-20 18:02:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201629765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:35,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:35,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:35,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608743984] [2024-06-20 18:02:35,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:35,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:35,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:35,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:35,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 183 transitions, 1797 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:35,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:35,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:35,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:35,786 INFO L124 PetriNetUnfolderBase]: 1279/2222 cut-off events. [2024-06-20 18:02:35,786 INFO L125 PetriNetUnfolderBase]: For 56853/56853 co-relation queries the response was YES. [2024-06-20 18:02:35,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13165 conditions, 2222 events. 1279/2222 cut-off events. For 56853/56853 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12686 event pairs, 267 based on Foata normal form. 6/2223 useless extension candidates. Maximal degree in co-relation 13106. Up to 1742 conditions per place. [2024-06-20 18:02:35,804 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 152 selfloop transitions, 58 changer transitions 0/220 dead transitions. [2024-06-20 18:02:35,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 220 transitions, 2479 flow [2024-06-20 18:02:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:02:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:02:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-20 18:02:35,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253229974160207 [2024-06-20 18:02:35,806 INFO L175 Difference]: Start difference. First operand has 131 places, 183 transitions, 1797 flow. Second operand 9 states and 242 transitions. [2024-06-20 18:02:35,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 220 transitions, 2479 flow [2024-06-20 18:02:35,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 220 transitions, 2401 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 18:02:35,861 INFO L231 Difference]: Finished difference. Result has 136 places, 186 transitions, 1915 flow [2024-06-20 18:02:35,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1915, PETRI_PLACES=136, PETRI_TRANSITIONS=186} [2024-06-20 18:02:35,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-20 18:02:35,861 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 186 transitions, 1915 flow [2024-06-20 18:02:35,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:35,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:35,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:35,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 18:02:35,862 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:35,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1249088865, now seen corresponding path program 3 times [2024-06-20 18:02:35,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:35,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317664261] [2024-06-20 18:02:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:35,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:36,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:36,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317664261] [2024-06-20 18:02:36,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317664261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:36,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:36,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052380568] [2024-06-20 18:02:36,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:36,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:36,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:36,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:36,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:36,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 186 transitions, 1915 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:36,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:36,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:36,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:36,486 INFO L124 PetriNetUnfolderBase]: 1307/2277 cut-off events. [2024-06-20 18:02:36,486 INFO L125 PetriNetUnfolderBase]: For 62213/62213 co-relation queries the response was YES. [2024-06-20 18:02:36,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13820 conditions, 2277 events. 1307/2277 cut-off events. For 62213/62213 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13016 event pairs, 265 based on Foata normal form. 6/2282 useless extension candidates. Maximal degree in co-relation 13760. Up to 1881 conditions per place. [2024-06-20 18:02:36,503 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 173 selfloop transitions, 28 changer transitions 0/211 dead transitions. [2024-06-20 18:02:36,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 211 transitions, 2501 flow [2024-06-20 18:02:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:02:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:02:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 18:02:36,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-20 18:02:36,505 INFO L175 Difference]: Start difference. First operand has 136 places, 186 transitions, 1915 flow. Second operand 7 states and 186 transitions. [2024-06-20 18:02:36,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 211 transitions, 2501 flow [2024-06-20 18:02:36,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 211 transitions, 2329 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 18:02:36,565 INFO L231 Difference]: Finished difference. Result has 136 places, 189 transitions, 1885 flow [2024-06-20 18:02:36,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1885, PETRI_PLACES=136, PETRI_TRANSITIONS=189} [2024-06-20 18:02:36,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-20 18:02:36,565 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 189 transitions, 1885 flow [2024-06-20 18:02:36,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:36,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:36,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:36,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 18:02:36,566 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:36,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:36,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1248732675, now seen corresponding path program 4 times [2024-06-20 18:02:36,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:36,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305012968] [2024-06-20 18:02:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:36,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305012968] [2024-06-20 18:02:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305012968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:36,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417665701] [2024-06-20 18:02:36,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:36,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:36,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:36,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 189 transitions, 1885 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:36,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:36,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:36,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:37,196 INFO L124 PetriNetUnfolderBase]: 1336/2335 cut-off events. [2024-06-20 18:02:37,196 INFO L125 PetriNetUnfolderBase]: For 66193/66193 co-relation queries the response was YES. [2024-06-20 18:02:37,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14261 conditions, 2335 events. 1336/2335 cut-off events. For 66193/66193 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13449 event pairs, 252 based on Foata normal form. 6/2340 useless extension candidates. Maximal degree in co-relation 14200. Up to 1840 conditions per place. [2024-06-20 18:02:37,214 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 182 selfloop transitions, 30 changer transitions 0/222 dead transitions. [2024-06-20 18:02:37,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 222 transitions, 2631 flow [2024-06-20 18:02:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:02:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:02:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-20 18:02:37,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345514950166113 [2024-06-20 18:02:37,215 INFO L175 Difference]: Start difference. First operand has 136 places, 189 transitions, 1885 flow. Second operand 7 states and 191 transitions. [2024-06-20 18:02:37,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 222 transitions, 2631 flow [2024-06-20 18:02:37,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 222 transitions, 2525 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 18:02:37,290 INFO L231 Difference]: Finished difference. Result has 140 places, 195 transitions, 2002 flow [2024-06-20 18:02:37,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2002, PETRI_PLACES=140, PETRI_TRANSITIONS=195} [2024-06-20 18:02:37,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-20 18:02:37,291 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 195 transitions, 2002 flow [2024-06-20 18:02:37,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:37,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:37,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:37,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 18:02:37,292 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:37,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2076823690, now seen corresponding path program 1 times [2024-06-20 18:02:37,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:37,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783694513] [2024-06-20 18:02:37,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:37,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:37,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783694513] [2024-06-20 18:02:37,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783694513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:37,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:37,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 18:02:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487943543] [2024-06-20 18:02:37,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:37,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 18:02:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:37,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 18:02:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 18:02:37,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:02:37,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 195 transitions, 2002 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:37,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:37,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:02:37,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:37,820 INFO L124 PetriNetUnfolderBase]: 1255/2251 cut-off events. [2024-06-20 18:02:37,821 INFO L125 PetriNetUnfolderBase]: For 69146/69146 co-relation queries the response was YES. [2024-06-20 18:02:37,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14005 conditions, 2251 events. 1255/2251 cut-off events. For 69146/69146 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13322 event pairs, 279 based on Foata normal form. 2/2246 useless extension candidates. Maximal degree in co-relation 13942. Up to 1748 conditions per place. [2024-06-20 18:02:37,839 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 160 selfloop transitions, 24 changer transitions 0/214 dead transitions. [2024-06-20 18:02:37,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 214 transitions, 2496 flow [2024-06-20 18:02:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:02:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:02:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-20 18:02:37,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6651162790697674 [2024-06-20 18:02:37,840 INFO L175 Difference]: Start difference. First operand has 140 places, 195 transitions, 2002 flow. Second operand 5 states and 143 transitions. [2024-06-20 18:02:37,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 214 transitions, 2496 flow [2024-06-20 18:02:37,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 214 transitions, 2376 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-20 18:02:37,924 INFO L231 Difference]: Finished difference. Result has 142 places, 198 transitions, 1961 flow [2024-06-20 18:02:37,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1961, PETRI_PLACES=142, PETRI_TRANSITIONS=198} [2024-06-20 18:02:37,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-20 18:02:37,924 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 198 transitions, 1961 flow [2024-06-20 18:02:37,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:37,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:37,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:37,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 18:02:37,925 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:37,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1076681678, now seen corresponding path program 2 times [2024-06-20 18:02:37,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:37,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233667235] [2024-06-20 18:02:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:37,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:38,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233667235] [2024-06-20 18:02:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233667235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:38,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:38,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:02:38,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186329401] [2024-06-20 18:02:38,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:38,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:02:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:02:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:02:38,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:02:38,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 198 transitions, 1961 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:38,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:38,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:02:38,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:38,472 INFO L124 PetriNetUnfolderBase]: 1251/2228 cut-off events. [2024-06-20 18:02:38,472 INFO L125 PetriNetUnfolderBase]: For 69190/69190 co-relation queries the response was YES. [2024-06-20 18:02:38,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13752 conditions, 2228 events. 1251/2228 cut-off events. For 69190/69190 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13167 event pairs, 282 based on Foata normal form. 2/2220 useless extension candidates. Maximal degree in co-relation 13687. Up to 1743 conditions per place. [2024-06-20 18:02:38,490 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 154 selfloop transitions, 24 changer transitions 0/208 dead transitions. [2024-06-20 18:02:38,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 208 transitions, 2341 flow [2024-06-20 18:02:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 18:02:38,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-20 18:02:38,491 INFO L175 Difference]: Start difference. First operand has 142 places, 198 transitions, 1961 flow. Second operand 6 states and 158 transitions. [2024-06-20 18:02:38,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 208 transitions, 2341 flow [2024-06-20 18:02:38,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 208 transitions, 2277 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 18:02:38,576 INFO L231 Difference]: Finished difference. Result has 145 places, 198 transitions, 1951 flow [2024-06-20 18:02:38,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1897, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1951, PETRI_PLACES=145, PETRI_TRANSITIONS=198} [2024-06-20 18:02:38,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-20 18:02:38,577 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 198 transitions, 1951 flow [2024-06-20 18:02:38,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:38,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:38,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:38,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 18:02:38,577 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:38,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1757294560, now seen corresponding path program 1 times [2024-06-20 18:02:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:38,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761383853] [2024-06-20 18:02:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:38,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:38,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:38,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761383853] [2024-06-20 18:02:38,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761383853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:38,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:38,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:38,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142179477] [2024-06-20 18:02:38,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:38,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:38,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:38,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:02:38,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 198 transitions, 1951 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:38,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:38,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:02:38,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:39,176 INFO L124 PetriNetUnfolderBase]: 1327/2319 cut-off events. [2024-06-20 18:02:39,177 INFO L125 PetriNetUnfolderBase]: For 71659/71659 co-relation queries the response was YES. [2024-06-20 18:02:39,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14245 conditions, 2319 events. 1327/2319 cut-off events. For 71659/71659 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13359 event pairs, 271 based on Foata normal form. 2/2320 useless extension candidates. Maximal degree in co-relation 14179. Up to 1940 conditions per place. [2024-06-20 18:02:39,195 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 180 selfloop transitions, 25 changer transitions 0/214 dead transitions. [2024-06-20 18:02:39,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 214 transitions, 2401 flow [2024-06-20 18:02:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 18:02:39,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-20 18:02:39,196 INFO L175 Difference]: Start difference. First operand has 145 places, 198 transitions, 1951 flow. Second operand 6 states and 154 transitions. [2024-06-20 18:02:39,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 214 transitions, 2401 flow [2024-06-20 18:02:39,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 214 transitions, 2328 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 18:02:39,295 INFO L231 Difference]: Finished difference. Result has 146 places, 198 transitions, 1942 flow [2024-06-20 18:02:39,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1942, PETRI_PLACES=146, PETRI_TRANSITIONS=198} [2024-06-20 18:02:39,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-20 18:02:39,295 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 198 transitions, 1942 flow [2024-06-20 18:02:39,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:39,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:39,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:39,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 18:02:39,296 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:39,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash -27799414, now seen corresponding path program 2 times [2024-06-20 18:02:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:39,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054646576] [2024-06-20 18:02:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:39,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:39,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:39,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054646576] [2024-06-20 18:02:39,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054646576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:39,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:39,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:39,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123613264] [2024-06-20 18:02:39,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:39,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:39,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:39,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:39,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:39,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:02:39,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 198 transitions, 1942 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:39,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:39,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:02:39,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:39,909 INFO L124 PetriNetUnfolderBase]: 1345/2343 cut-off events. [2024-06-20 18:02:39,910 INFO L125 PetriNetUnfolderBase]: For 75806/75806 co-relation queries the response was YES. [2024-06-20 18:02:39,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14538 conditions, 2343 events. 1345/2343 cut-off events. For 75806/75806 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13530 event pairs, 277 based on Foata normal form. 2/2340 useless extension candidates. Maximal degree in co-relation 14471. Up to 1862 conditions per place. [2024-06-20 18:02:39,927 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 154 selfloop transitions, 62 changer transitions 0/225 dead transitions. [2024-06-20 18:02:39,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 225 transitions, 2633 flow [2024-06-20 18:02:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:02:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:02:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 18:02:39,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-20 18:02:39,929 INFO L175 Difference]: Start difference. First operand has 146 places, 198 transitions, 1942 flow. Second operand 8 states and 200 transitions. [2024-06-20 18:02:39,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 225 transitions, 2633 flow [2024-06-20 18:02:40,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 225 transitions, 2583 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 18:02:40,044 INFO L231 Difference]: Finished difference. Result has 149 places, 205 transitions, 2101 flow [2024-06-20 18:02:40,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2101, PETRI_PLACES=149, PETRI_TRANSITIONS=205} [2024-06-20 18:02:40,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-20 18:02:40,045 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 205 transitions, 2101 flow [2024-06-20 18:02:40,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:40,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:40,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:40,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 18:02:40,045 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:40,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:40,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1676235048, now seen corresponding path program 1 times [2024-06-20 18:02:40,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:40,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344211204] [2024-06-20 18:02:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:40,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:40,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:40,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344211204] [2024-06-20 18:02:40,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344211204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:40,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:40,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:02:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683371403] [2024-06-20 18:02:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:40,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:02:40,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:02:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:02:40,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:40,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 205 transitions, 2101 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:40,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:40,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:40,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:40,563 INFO L124 PetriNetUnfolderBase]: 1355/2359 cut-off events. [2024-06-20 18:02:40,563 INFO L125 PetriNetUnfolderBase]: For 79966/79966 co-relation queries the response was YES. [2024-06-20 18:02:40,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14883 conditions, 2359 events. 1355/2359 cut-off events. For 79966/79966 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13628 event pairs, 281 based on Foata normal form. 2/2354 useless extension candidates. Maximal degree in co-relation 14816. Up to 1911 conditions per place. [2024-06-20 18:02:40,582 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 185 selfloop transitions, 39 changer transitions 0/234 dead transitions. [2024-06-20 18:02:40,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 234 transitions, 2797 flow [2024-06-20 18:02:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 18:02:40,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-20 18:02:40,583 INFO L175 Difference]: Start difference. First operand has 149 places, 205 transitions, 2101 flow. Second operand 6 states and 160 transitions. [2024-06-20 18:02:40,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 234 transitions, 2797 flow [2024-06-20 18:02:40,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 234 transitions, 2687 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 18:02:40,685 INFO L231 Difference]: Finished difference. Result has 152 places, 219 transitions, 2236 flow [2024-06-20 18:02:40,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2236, PETRI_PLACES=152, PETRI_TRANSITIONS=219} [2024-06-20 18:02:40,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-20 18:02:40,686 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 219 transitions, 2236 flow [2024-06-20 18:02:40,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:40,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:40,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:40,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 18:02:40,686 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:40,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:40,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1243369160, now seen corresponding path program 3 times [2024-06-20 18:02:40,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:40,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304177856] [2024-06-20 18:02:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:40,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:40,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304177856] [2024-06-20 18:02:40,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304177856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:40,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:40,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:02:40,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041730200] [2024-06-20 18:02:40,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:02:40,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:40,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:02:40,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:02:41,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:02:41,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 219 transitions, 2236 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:41,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:41,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:02:41,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:41,456 INFO L124 PetriNetUnfolderBase]: 1349/2344 cut-off events. [2024-06-20 18:02:41,456 INFO L125 PetriNetUnfolderBase]: For 83553/83553 co-relation queries the response was YES. [2024-06-20 18:02:41,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15014 conditions, 2344 events. 1349/2344 cut-off events. For 83553/83553 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13530 event pairs, 288 based on Foata normal form. 2/2341 useless extension candidates. Maximal degree in co-relation 14945. Up to 1871 conditions per place. [2024-06-20 18:02:41,474 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 162 selfloop transitions, 65 changer transitions 0/236 dead transitions. [2024-06-20 18:02:41,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 236 transitions, 2874 flow [2024-06-20 18:02:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:02:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:02:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 18:02:41,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-20 18:02:41,476 INFO L175 Difference]: Start difference. First operand has 152 places, 219 transitions, 2236 flow. Second operand 8 states and 198 transitions. [2024-06-20 18:02:41,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 236 transitions, 2874 flow [2024-06-20 18:02:41,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 236 transitions, 2802 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-20 18:02:41,596 INFO L231 Difference]: Finished difference. Result has 158 places, 219 transitions, 2301 flow [2024-06-20 18:02:41,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2301, PETRI_PLACES=158, PETRI_TRANSITIONS=219} [2024-06-20 18:02:41,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-20 18:02:41,597 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 219 transitions, 2301 flow [2024-06-20 18:02:41,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:41,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:41,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:41,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 18:02:41,598 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:41,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:41,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1448333898, now seen corresponding path program 2 times [2024-06-20 18:02:41,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:41,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914081424] [2024-06-20 18:02:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:41,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:41,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:41,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914081424] [2024-06-20 18:02:41,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914081424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:41,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:41,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:02:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083777770] [2024-06-20 18:02:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:41,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:02:41,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:02:41,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:02:41,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:41,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 219 transitions, 2301 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:41,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:41,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:41,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:42,124 INFO L124 PetriNetUnfolderBase]: 1367/2374 cut-off events. [2024-06-20 18:02:42,125 INFO L125 PetriNetUnfolderBase]: For 88657/88657 co-relation queries the response was YES. [2024-06-20 18:02:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15453 conditions, 2374 events. 1367/2374 cut-off events. For 88657/88657 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13752 event pairs, 293 based on Foata normal form. 2/2371 useless extension candidates. Maximal degree in co-relation 15382. Up to 1922 conditions per place. [2024-06-20 18:02:42,143 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 182 selfloop transitions, 48 changer transitions 0/240 dead transitions. [2024-06-20 18:02:42,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 240 transitions, 3056 flow [2024-06-20 18:02:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:42,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 18:02:42,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-20 18:02:42,145 INFO L175 Difference]: Start difference. First operand has 158 places, 219 transitions, 2301 flow. Second operand 6 states and 160 transitions. [2024-06-20 18:02:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 240 transitions, 3056 flow [2024-06-20 18:02:42,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 240 transitions, 2908 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 18:02:42,313 INFO L231 Difference]: Finished difference. Result has 158 places, 228 transitions, 2377 flow [2024-06-20 18:02:42,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2377, PETRI_PLACES=158, PETRI_TRANSITIONS=228} [2024-06-20 18:02:42,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-20 18:02:42,313 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 228 transitions, 2377 flow [2024-06-20 18:02:42,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:42,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:42,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:42,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 18:02:42,314 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:42,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:42,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1439763018, now seen corresponding path program 3 times [2024-06-20 18:02:42,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:42,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770295409] [2024-06-20 18:02:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:42,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:42,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:42,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770295409] [2024-06-20 18:02:42,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770295409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:42,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:42,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:02:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298470383] [2024-06-20 18:02:42,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:42,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:02:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:02:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:02:42,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:42,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 228 transitions, 2377 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:42,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:42,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:42,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:42,926 INFO L124 PetriNetUnfolderBase]: 1361/2366 cut-off events. [2024-06-20 18:02:42,926 INFO L125 PetriNetUnfolderBase]: For 91134/91134 co-relation queries the response was YES. [2024-06-20 18:02:42,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15401 conditions, 2366 events. 1361/2366 cut-off events. For 91134/91134 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13702 event pairs, 293 based on Foata normal form. 2/2363 useless extension candidates. Maximal degree in co-relation 15329. Up to 1917 conditions per place. [2024-06-20 18:02:42,945 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 179 selfloop transitions, 50 changer transitions 0/239 dead transitions. [2024-06-20 18:02:42,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 239 transitions, 2937 flow [2024-06-20 18:02:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 18:02:42,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-20 18:02:42,949 INFO L175 Difference]: Start difference. First operand has 158 places, 228 transitions, 2377 flow. Second operand 6 states and 158 transitions. [2024-06-20 18:02:42,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 239 transitions, 2937 flow [2024-06-20 18:02:43,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 239 transitions, 2867 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-20 18:02:43,087 INFO L231 Difference]: Finished difference. Result has 164 places, 228 transitions, 2414 flow [2024-06-20 18:02:43,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2414, PETRI_PLACES=164, PETRI_TRANSITIONS=228} [2024-06-20 18:02:43,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-20 18:02:43,088 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 228 transitions, 2414 flow [2024-06-20 18:02:43,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:43,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:43,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:43,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 18:02:43,088 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:43,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1439752106, now seen corresponding path program 1 times [2024-06-20 18:02:43,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:43,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261366419] [2024-06-20 18:02:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:43,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:43,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:43,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261366419] [2024-06-20 18:02:43,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261366419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:43,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:43,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:02:43,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842347863] [2024-06-20 18:02:43,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:43,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:02:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:02:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:02:43,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:02:43,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 228 transitions, 2414 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:43,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:43,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:02:43,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:43,651 INFO L124 PetriNetUnfolderBase]: 1317/2331 cut-off events. [2024-06-20 18:02:43,652 INFO L125 PetriNetUnfolderBase]: For 101056/101056 co-relation queries the response was YES. [2024-06-20 18:02:43,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15196 conditions, 2331 events. 1317/2331 cut-off events. For 101056/101056 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13845 event pairs, 281 based on Foata normal form. 12/2330 useless extension candidates. Maximal degree in co-relation 15121. Up to 1771 conditions per place. [2024-06-20 18:02:43,672 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 174 selfloop transitions, 32 changer transitions 0/244 dead transitions. [2024-06-20 18:02:43,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 244 transitions, 2906 flow [2024-06-20 18:02:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 18:02:43,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-20 18:02:43,674 INFO L175 Difference]: Start difference. First operand has 164 places, 228 transitions, 2414 flow. Second operand 6 states and 161 transitions. [2024-06-20 18:02:43,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 244 transitions, 2906 flow [2024-06-20 18:02:43,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 244 transitions, 2801 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 18:02:43,799 INFO L231 Difference]: Finished difference. Result has 166 places, 230 transitions, 2416 flow [2024-06-20 18:02:43,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2309, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2416, PETRI_PLACES=166, PETRI_TRANSITIONS=230} [2024-06-20 18:02:43,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-20 18:02:43,800 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 230 transitions, 2416 flow [2024-06-20 18:02:43,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:43,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:43,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:43,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 18:02:43,801 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:43,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:43,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1197788830, now seen corresponding path program 1 times [2024-06-20 18:02:43,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:43,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014221330] [2024-06-20 18:02:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:43,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:44,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:44,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014221330] [2024-06-20 18:02:44,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014221330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:44,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:44,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:44,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496787445] [2024-06-20 18:02:44,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:44,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:44,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:44,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:44,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 230 transitions, 2416 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:44,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:44,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:44,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:44,549 INFO L124 PetriNetUnfolderBase]: 1585/2726 cut-off events. [2024-06-20 18:02:44,549 INFO L125 PetriNetUnfolderBase]: For 133281/133281 co-relation queries the response was YES. [2024-06-20 18:02:44,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18835 conditions, 2726 events. 1585/2726 cut-off events. For 133281/133281 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16147 event pairs, 228 based on Foata normal form. 18/2738 useless extension candidates. Maximal degree in co-relation 18759. Up to 1959 conditions per place. [2024-06-20 18:02:44,573 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 238 selfloop transitions, 37 changer transitions 0/285 dead transitions. [2024-06-20 18:02:44,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 285 transitions, 3392 flow [2024-06-20 18:02:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:02:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:02:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-06-20 18:02:44,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6441860465116279 [2024-06-20 18:02:44,574 INFO L175 Difference]: Start difference. First operand has 166 places, 230 transitions, 2416 flow. Second operand 10 states and 277 transitions. [2024-06-20 18:02:44,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 285 transitions, 3392 flow [2024-06-20 18:02:44,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 285 transitions, 3309 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 18:02:44,780 INFO L231 Difference]: Finished difference. Result has 172 places, 234 transitions, 2558 flow [2024-06-20 18:02:44,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2558, PETRI_PLACES=172, PETRI_TRANSITIONS=234} [2024-06-20 18:02:44,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-20 18:02:44,781 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 234 transitions, 2558 flow [2024-06-20 18:02:44,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:44,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:44,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:44,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 18:02:44,782 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:44,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:44,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2027459486, now seen corresponding path program 2 times [2024-06-20 18:02:44,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:44,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186703394] [2024-06-20 18:02:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:44,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:45,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186703394] [2024-06-20 18:02:45,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186703394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:45,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:45,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:45,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558911338] [2024-06-20 18:02:45,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:45,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:45,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:45,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:45,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:45,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 234 transitions, 2558 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:45,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:45,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:45,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:45,608 INFO L124 PetriNetUnfolderBase]: 1646/2845 cut-off events. [2024-06-20 18:02:45,609 INFO L125 PetriNetUnfolderBase]: For 141711/141711 co-relation queries the response was YES. [2024-06-20 18:02:45,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19814 conditions, 2845 events. 1646/2845 cut-off events. For 141711/141711 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17004 event pairs, 317 based on Foata normal form. 18/2857 useless extension candidates. Maximal degree in co-relation 19737. Up to 2143 conditions per place. [2024-06-20 18:02:45,630 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 237 selfloop transitions, 31 changer transitions 0/278 dead transitions. [2024-06-20 18:02:45,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 278 transitions, 3436 flow [2024-06-20 18:02:45,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:02:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:02:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-20 18:02:45,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598837209302325 [2024-06-20 18:02:45,631 INFO L175 Difference]: Start difference. First operand has 172 places, 234 transitions, 2558 flow. Second operand 8 states and 227 transitions. [2024-06-20 18:02:45,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 278 transitions, 3436 flow [2024-06-20 18:02:45,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 278 transitions, 3336 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 18:02:45,905 INFO L231 Difference]: Finished difference. Result has 174 places, 236 transitions, 2601 flow [2024-06-20 18:02:45,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2464, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2601, PETRI_PLACES=174, PETRI_TRANSITIONS=236} [2024-06-20 18:02:45,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-20 18:02:45,906 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 236 transitions, 2601 flow [2024-06-20 18:02:45,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:45,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:45,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:45,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 18:02:45,907 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:45,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1228526068, now seen corresponding path program 3 times [2024-06-20 18:02:45,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:45,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905801971] [2024-06-20 18:02:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:45,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:46,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:46,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905801971] [2024-06-20 18:02:46,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905801971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:46,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:46,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:46,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454674049] [2024-06-20 18:02:46,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:46,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:46,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:46,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:46,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 236 transitions, 2601 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:46,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:46,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:46,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:46,666 INFO L124 PetriNetUnfolderBase]: 1600/2775 cut-off events. [2024-06-20 18:02:46,666 INFO L125 PetriNetUnfolderBase]: For 133316/133316 co-relation queries the response was YES. [2024-06-20 18:02:46,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18322 conditions, 2775 events. 1600/2775 cut-off events. For 133316/133316 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16596 event pairs, 314 based on Foata normal form. 24/2793 useless extension candidates. Maximal degree in co-relation 18243. Up to 2244 conditions per place. [2024-06-20 18:02:46,690 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 236 selfloop transitions, 27 changer transitions 0/273 dead transitions. [2024-06-20 18:02:46,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 273 transitions, 3239 flow [2024-06-20 18:02:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:02:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:02:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-20 18:02:46,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453488372093024 [2024-06-20 18:02:46,692 INFO L175 Difference]: Start difference. First operand has 174 places, 236 transitions, 2601 flow. Second operand 8 states and 222 transitions. [2024-06-20 18:02:46,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 273 transitions, 3239 flow [2024-06-20 18:02:46,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 273 transitions, 3097 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 18:02:46,911 INFO L231 Difference]: Finished difference. Result has 176 places, 236 transitions, 2521 flow [2024-06-20 18:02:46,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2521, PETRI_PLACES=176, PETRI_TRANSITIONS=236} [2024-06-20 18:02:46,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-20 18:02:46,912 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 236 transitions, 2521 flow [2024-06-20 18:02:46,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:46,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:46,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:46,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 18:02:46,913 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:46,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:46,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1699170590, now seen corresponding path program 4 times [2024-06-20 18:02:46,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:46,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692554591] [2024-06-20 18:02:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:46,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:47,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:47,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692554591] [2024-06-20 18:02:47,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692554591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:47,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:47,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:47,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210913727] [2024-06-20 18:02:47,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:47,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:47,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:47,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:47,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:47,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 236 transitions, 2521 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:47,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:47,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:47,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:47,740 INFO L124 PetriNetUnfolderBase]: 1686/2924 cut-off events. [2024-06-20 18:02:47,741 INFO L125 PetriNetUnfolderBase]: For 138038/138038 co-relation queries the response was YES. [2024-06-20 18:02:47,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18907 conditions, 2924 events. 1686/2924 cut-off events. For 138038/138038 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17728 event pairs, 341 based on Foata normal form. 24/2938 useless extension candidates. Maximal degree in co-relation 18827. Up to 2113 conditions per place. [2024-06-20 18:02:47,768 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 168 selfloop transitions, 113 changer transitions 0/291 dead transitions. [2024-06-20 18:02:47,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 291 transitions, 3565 flow [2024-06-20 18:02:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 18:02:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 18:02:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 330 transitions. [2024-06-20 18:02:47,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2024-06-20 18:02:47,769 INFO L175 Difference]: Start difference. First operand has 176 places, 236 transitions, 2521 flow. Second operand 12 states and 330 transitions. [2024-06-20 18:02:47,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 291 transitions, 3565 flow [2024-06-20 18:02:47,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 291 transitions, 3503 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 18:02:47,945 INFO L231 Difference]: Finished difference. Result has 181 places, 238 transitions, 2771 flow [2024-06-20 18:02:47,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2771, PETRI_PLACES=181, PETRI_TRANSITIONS=238} [2024-06-20 18:02:47,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-20 18:02:47,946 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 238 transitions, 2771 flow [2024-06-20 18:02:47,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:47,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:47,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:47,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 18:02:47,947 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:47,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash -188979204, now seen corresponding path program 5 times [2024-06-20 18:02:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:47,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110490188] [2024-06-20 18:02:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:47,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:48,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:48,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110490188] [2024-06-20 18:02:48,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110490188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:48,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815768660] [2024-06-20 18:02:48,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:48,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:48,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:48,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 238 transitions, 2771 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:48,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:48,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:48,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:48,790 INFO L124 PetriNetUnfolderBase]: 1879/3253 cut-off events. [2024-06-20 18:02:48,790 INFO L125 PetriNetUnfolderBase]: For 168860/168860 co-relation queries the response was YES. [2024-06-20 18:02:48,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22612 conditions, 3253 events. 1879/3253 cut-off events. For 168860/168860 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20184 event pairs, 379 based on Foata normal form. 18/3261 useless extension candidates. Maximal degree in co-relation 22531. Up to 2133 conditions per place. [2024-06-20 18:02:48,820 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 170 selfloop transitions, 120 changer transitions 0/300 dead transitions. [2024-06-20 18:02:48,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 300 transitions, 4089 flow [2024-06-20 18:02:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 18:02:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 18:02:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 334 transitions. [2024-06-20 18:02:48,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472868217054264 [2024-06-20 18:02:48,822 INFO L175 Difference]: Start difference. First operand has 181 places, 238 transitions, 2771 flow. Second operand 12 states and 334 transitions. [2024-06-20 18:02:48,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 300 transitions, 4089 flow [2024-06-20 18:02:49,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 300 transitions, 3821 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-20 18:02:49,096 INFO L231 Difference]: Finished difference. Result has 183 places, 242 transitions, 2910 flow [2024-06-20 18:02:49,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2910, PETRI_PLACES=183, PETRI_TRANSITIONS=242} [2024-06-20 18:02:49,097 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-20 18:02:49,097 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 242 transitions, 2910 flow [2024-06-20 18:02:49,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:49,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:49,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:49,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 18:02:49,097 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:49,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:49,098 INFO L85 PathProgramCache]: Analyzing trace with hash 389652510, now seen corresponding path program 6 times [2024-06-20 18:02:49,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:49,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521913242] [2024-06-20 18:02:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:49,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:49,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:49,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521913242] [2024-06-20 18:02:49,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521913242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:49,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:49,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:49,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47298107] [2024-06-20 18:02:49,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:49,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:49,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:49,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:49,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 242 transitions, 2910 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:49,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:49,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:49,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:49,865 INFO L124 PetriNetUnfolderBase]: 1833/3183 cut-off events. [2024-06-20 18:02:49,865 INFO L125 PetriNetUnfolderBase]: For 157425/157425 co-relation queries the response was YES. [2024-06-20 18:02:49,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21097 conditions, 3183 events. 1833/3183 cut-off events. For 157425/157425 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19713 event pairs, 376 based on Foata normal form. 24/3197 useless extension candidates. Maximal degree in co-relation 21015. Up to 2358 conditions per place. [2024-06-20 18:02:49,896 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 165 selfloop transitions, 112 changer transitions 0/287 dead transitions. [2024-06-20 18:02:49,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 287 transitions, 3864 flow [2024-06-20 18:02:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:02:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:02:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-06-20 18:02:49,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-20 18:02:49,897 INFO L175 Difference]: Start difference. First operand has 183 places, 242 transitions, 2910 flow. Second operand 10 states and 280 transitions. [2024-06-20 18:02:49,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 287 transitions, 3864 flow [2024-06-20 18:02:50,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 287 transitions, 3609 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-20 18:02:50,117 INFO L231 Difference]: Finished difference. Result has 185 places, 242 transitions, 2887 flow [2024-06-20 18:02:50,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2887, PETRI_PLACES=185, PETRI_TRANSITIONS=242} [2024-06-20 18:02:50,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-20 18:02:50,118 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 242 transitions, 2887 flow [2024-06-20 18:02:50,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:50,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:50,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:50,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 18:02:50,118 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:50,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash -353220120, now seen corresponding path program 1 times [2024-06-20 18:02:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:50,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515207996] [2024-06-20 18:02:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:50,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:50,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:50,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515207996] [2024-06-20 18:02:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515207996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:50,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:50,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819232607] [2024-06-20 18:02:50,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:50,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:50,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:50,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:50,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:50,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 242 transitions, 2887 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:50,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:50,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:50,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:50,994 INFO L124 PetriNetUnfolderBase]: 1894/3282 cut-off events. [2024-06-20 18:02:50,994 INFO L125 PetriNetUnfolderBase]: For 154917/154917 co-relation queries the response was YES. [2024-06-20 18:02:51,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21610 conditions, 3282 events. 1894/3282 cut-off events. For 154917/154917 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20408 event pairs, 367 based on Foata normal form. 18/3286 useless extension candidates. Maximal degree in co-relation 21526. Up to 2096 conditions per place. [2024-06-20 18:02:51,022 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 162 selfloop transitions, 120 changer transitions 0/292 dead transitions. [2024-06-20 18:02:51,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 292 transitions, 3957 flow [2024-06-20 18:02:51,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:02:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:02:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 282 transitions. [2024-06-20 18:02:51,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6558139534883721 [2024-06-20 18:02:51,024 INFO L175 Difference]: Start difference. First operand has 185 places, 242 transitions, 2887 flow. Second operand 10 states and 282 transitions. [2024-06-20 18:02:51,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 292 transitions, 3957 flow [2024-06-20 18:02:51,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 292 transitions, 3717 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 18:02:51,336 INFO L231 Difference]: Finished difference. Result has 186 places, 244 transitions, 2980 flow [2024-06-20 18:02:51,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2980, PETRI_PLACES=186, PETRI_TRANSITIONS=244} [2024-06-20 18:02:51,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-20 18:02:51,337 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 244 transitions, 2980 flow [2024-06-20 18:02:51,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:51,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:51,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:51,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 18:02:51,338 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:51,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:51,338 INFO L85 PathProgramCache]: Analyzing trace with hash -715320880, now seen corresponding path program 7 times [2024-06-20 18:02:51,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:51,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869207862] [2024-06-20 18:02:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:51,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:51,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:51,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869207862] [2024-06-20 18:02:51,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869207862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:51,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:51,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:51,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111782704] [2024-06-20 18:02:51,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:51,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:51,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:51,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:51,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:51,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:51,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 244 transitions, 2980 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:51,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:51,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:51,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:52,136 INFO L124 PetriNetUnfolderBase]: 1980/3440 cut-off events. [2024-06-20 18:02:52,136 INFO L125 PetriNetUnfolderBase]: For 171959/171959 co-relation queries the response was YES. [2024-06-20 18:02:52,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22949 conditions, 3440 events. 1980/3440 cut-off events. For 171959/171959 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21838 event pairs, 416 based on Foata normal form. 24/3456 useless extension candidates. Maximal degree in co-relation 22864. Up to 2603 conditions per place. [2024-06-20 18:02:52,168 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 174 selfloop transitions, 104 changer transitions 0/288 dead transitions. [2024-06-20 18:02:52,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 288 transitions, 4026 flow [2024-06-20 18:02:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:02:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:02:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 276 transitions. [2024-06-20 18:02:52,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2024-06-20 18:02:52,169 INFO L175 Difference]: Start difference. First operand has 186 places, 244 transitions, 2980 flow. Second operand 10 states and 276 transitions. [2024-06-20 18:02:52,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 288 transitions, 4026 flow [2024-06-20 18:02:52,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 288 transitions, 3729 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-20 18:02:52,487 INFO L231 Difference]: Finished difference. Result has 188 places, 246 transitions, 2989 flow [2024-06-20 18:02:52,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2683, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2989, PETRI_PLACES=188, PETRI_TRANSITIONS=246} [2024-06-20 18:02:52,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-20 18:02:52,488 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 246 transitions, 2989 flow [2024-06-20 18:02:52,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:52,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:52,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:52,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 18:02:52,489 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:52,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:52,489 INFO L85 PathProgramCache]: Analyzing trace with hash -805702498, now seen corresponding path program 8 times [2024-06-20 18:02:52,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:52,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357416694] [2024-06-20 18:02:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:52,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:52,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:52,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357416694] [2024-06-20 18:02:52,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357416694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:52,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:52,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:52,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636578360] [2024-06-20 18:02:52,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:52,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:52,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:52,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:52,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:52,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 246 transitions, 2989 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:52,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:52,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:52,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:53,313 INFO L124 PetriNetUnfolderBase]: 2066/3593 cut-off events. [2024-06-20 18:02:53,314 INFO L125 PetriNetUnfolderBase]: For 181550/181550 co-relation queries the response was YES. [2024-06-20 18:02:53,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23839 conditions, 3593 events. 2066/3593 cut-off events. For 181550/181550 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22953 event pairs, 434 based on Foata normal form. 24/3609 useless extension candidates. Maximal degree in co-relation 23753. Up to 2745 conditions per place. [2024-06-20 18:02:53,346 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 177 selfloop transitions, 108 changer transitions 0/295 dead transitions. [2024-06-20 18:02:53,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 295 transitions, 4167 flow [2024-06-20 18:02:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:02:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:02:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 299 transitions. [2024-06-20 18:02:53,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321353065539113 [2024-06-20 18:02:53,348 INFO L175 Difference]: Start difference. First operand has 188 places, 246 transitions, 2989 flow. Second operand 11 states and 299 transitions. [2024-06-20 18:02:53,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 295 transitions, 4167 flow [2024-06-20 18:02:53,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 295 transitions, 3905 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 18:02:53,695 INFO L231 Difference]: Finished difference. Result has 191 places, 248 transitions, 3045 flow [2024-06-20 18:02:53,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3045, PETRI_PLACES=191, PETRI_TRANSITIONS=248} [2024-06-20 18:02:53,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-20 18:02:53,696 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 248 transitions, 3045 flow [2024-06-20 18:02:53,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:53,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:53,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:53,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 18:02:53,697 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:53,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:53,697 INFO L85 PathProgramCache]: Analyzing trace with hash -805822468, now seen corresponding path program 9 times [2024-06-20 18:02:53,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:53,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042616967] [2024-06-20 18:02:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:53,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:53,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:53,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042616967] [2024-06-20 18:02:53,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042616967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:53,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:53,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:53,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161310872] [2024-06-20 18:02:53,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:53,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:53,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:53,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:53,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:53,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:53,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 248 transitions, 3045 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:53,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:53,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:53,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:54,635 INFO L124 PetriNetUnfolderBase]: 2234/3873 cut-off events. [2024-06-20 18:02:54,635 INFO L125 PetriNetUnfolderBase]: For 210195/210195 co-relation queries the response was YES. [2024-06-20 18:02:54,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26783 conditions, 3873 events. 2234/3873 cut-off events. For 210195/210195 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24976 event pairs, 465 based on Foata normal form. 18/3883 useless extension candidates. Maximal degree in co-relation 26696. Up to 2594 conditions per place. [2024-06-20 18:02:54,672 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 177 selfloop transitions, 117 changer transitions 0/304 dead transitions. [2024-06-20 18:02:54,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 304 transitions, 4535 flow [2024-06-20 18:02:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:02:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:02:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 303 transitions. [2024-06-20 18:02:54,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6405919661733616 [2024-06-20 18:02:54,673 INFO L175 Difference]: Start difference. First operand has 191 places, 248 transitions, 3045 flow. Second operand 11 states and 303 transitions. [2024-06-20 18:02:54,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 304 transitions, 4535 flow [2024-06-20 18:02:55,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 304 transitions, 4261 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-20 18:02:55,073 INFO L231 Difference]: Finished difference. Result has 193 places, 252 transitions, 3204 flow [2024-06-20 18:02:55,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3204, PETRI_PLACES=193, PETRI_TRANSITIONS=252} [2024-06-20 18:02:55,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-20 18:02:55,074 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 252 transitions, 3204 flow [2024-06-20 18:02:55,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:55,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:55,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:55,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 18:02:55,075 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:55,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1297316706, now seen corresponding path program 10 times [2024-06-20 18:02:55,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:55,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361195418] [2024-06-20 18:02:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:55,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:55,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:55,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361195418] [2024-06-20 18:02:55,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361195418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:55,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:55,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:55,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556393147] [2024-06-20 18:02:55,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:55,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:55,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:55,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:55,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:55,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:55,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 252 transitions, 3204 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:55,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:55,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:55,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:55,967 INFO L124 PetriNetUnfolderBase]: 2242/3889 cut-off events. [2024-06-20 18:02:55,967 INFO L125 PetriNetUnfolderBase]: For 207670/207670 co-relation queries the response was YES. [2024-06-20 18:02:56,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3889 events. 2242/3889 cut-off events. For 207670/207670 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25055 event pairs, 456 based on Foata normal form. 24/3905 useless extension candidates. Maximal degree in co-relation 26062. Up to 3263 conditions per place. [2024-06-20 18:02:56,067 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 232 selfloop transitions, 42 changer transitions 0/284 dead transitions. [2024-06-20 18:02:56,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 284 transitions, 4001 flow [2024-06-20 18:02:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:02:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:02:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-20 18:02:56,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-20 18:02:56,068 INFO L175 Difference]: Start difference. First operand has 193 places, 252 transitions, 3204 flow. Second operand 8 states and 216 transitions. [2024-06-20 18:02:56,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 284 transitions, 4001 flow [2024-06-20 18:02:56,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 284 transitions, 3754 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-20 18:02:56,440 INFO L231 Difference]: Finished difference. Result has 194 places, 255 transitions, 3118 flow [2024-06-20 18:02:56,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3118, PETRI_PLACES=194, PETRI_TRANSITIONS=255} [2024-06-20 18:02:56,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-20 18:02:56,440 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 255 transitions, 3118 flow [2024-06-20 18:02:56,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:56,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:56,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:56,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 18:02:56,441 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:56,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:56,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1978680126, now seen corresponding path program 2 times [2024-06-20 18:02:56,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:56,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33906923] [2024-06-20 18:02:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:56,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:56,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:56,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33906923] [2024-06-20 18:02:56,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33906923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:56,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:56,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:56,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990721640] [2024-06-20 18:02:56,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:56,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:56,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:56,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:56,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:56,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 255 transitions, 3118 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:56,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:56,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:56,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:57,317 INFO L124 PetriNetUnfolderBase]: 2303/4001 cut-off events. [2024-06-20 18:02:57,317 INFO L125 PetriNetUnfolderBase]: For 202507/202507 co-relation queries the response was YES. [2024-06-20 18:02:57,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26562 conditions, 4001 events. 2303/4001 cut-off events. For 202507/202507 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26032 event pairs, 475 based on Foata normal form. 18/4011 useless extension candidates. Maximal degree in co-relation 26472. Up to 2895 conditions per place. [2024-06-20 18:02:57,353 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 182 selfloop transitions, 110 changer transitions 0/302 dead transitions. [2024-06-20 18:02:57,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 302 transitions, 4246 flow [2024-06-20 18:02:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:02:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:02:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2024-06-20 18:02:57,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6465116279069767 [2024-06-20 18:02:57,355 INFO L175 Difference]: Start difference. First operand has 194 places, 255 transitions, 3118 flow. Second operand 10 states and 278 transitions. [2024-06-20 18:02:57,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 302 transitions, 4246 flow [2024-06-20 18:02:57,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 302 transitions, 4126 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 18:02:57,856 INFO L231 Difference]: Finished difference. Result has 198 places, 257 transitions, 3327 flow [2024-06-20 18:02:57,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3327, PETRI_PLACES=198, PETRI_TRANSITIONS=257} [2024-06-20 18:02:57,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-20 18:02:57,857 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 257 transitions, 3327 flow [2024-06-20 18:02:57,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:57,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:57,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:57,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 18:02:57,858 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:57,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1081748252, now seen corresponding path program 3 times [2024-06-20 18:02:57,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:57,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426801445] [2024-06-20 18:02:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:57,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:58,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426801445] [2024-06-20 18:02:58,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426801445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:58,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:58,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485653653] [2024-06-20 18:02:58,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:58,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:58,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:58,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:58,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 257 transitions, 3327 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:58,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:58,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:58,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:58,706 INFO L124 PetriNetUnfolderBase]: 2364/4116 cut-off events. [2024-06-20 18:02:58,706 INFO L125 PetriNetUnfolderBase]: For 213697/213697 co-relation queries the response was YES. [2024-06-20 18:02:58,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27643 conditions, 4116 events. 2364/4116 cut-off events. For 213697/213697 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26954 event pairs, 475 based on Foata normal form. 18/4126 useless extension candidates. Maximal degree in co-relation 27552. Up to 3352 conditions per place. [2024-06-20 18:02:58,745 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 236 selfloop transitions, 45 changer transitions 0/291 dead transitions. [2024-06-20 18:02:58,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 291 transitions, 4203 flow [2024-06-20 18:02:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:02:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:02:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-20 18:02:58,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2024-06-20 18:02:58,747 INFO L175 Difference]: Start difference. First operand has 198 places, 257 transitions, 3327 flow. Second operand 8 states and 218 transitions. [2024-06-20 18:02:58,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 291 transitions, 4203 flow [2024-06-20 18:02:59,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 291 transitions, 3910 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-20 18:02:59,089 INFO L231 Difference]: Finished difference. Result has 198 places, 259 transitions, 3237 flow [2024-06-20 18:02:59,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3034, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3237, PETRI_PLACES=198, PETRI_TRANSITIONS=259} [2024-06-20 18:02:59,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-20 18:02:59,089 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 259 transitions, 3237 flow [2024-06-20 18:02:59,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:59,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:59,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:59,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 18:02:59,090 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:02:59,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1736178916, now seen corresponding path program 4 times [2024-06-20 18:02:59,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:59,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178129926] [2024-06-20 18:02:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:59,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:59,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178129926] [2024-06-20 18:02:59,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178129926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:59,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:59,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:02:59,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107816610] [2024-06-20 18:02:59,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:59,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:02:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:02:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:02:59,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:02:59,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 259 transitions, 3237 flow. Second operand has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:59,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:59,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:02:59,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:00,014 INFO L124 PetriNetUnfolderBase]: 2430/4256 cut-off events. [2024-06-20 18:03:00,014 INFO L125 PetriNetUnfolderBase]: For 220471/220471 co-relation queries the response was YES. [2024-06-20 18:03:00,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28455 conditions, 4256 events. 2430/4256 cut-off events. For 220471/220471 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28160 event pairs, 477 based on Foata normal form. 18/4266 useless extension candidates. Maximal degree in co-relation 28363. Up to 3158 conditions per place. [2024-06-20 18:03:00,057 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 244 selfloop transitions, 44 changer transitions 0/298 dead transitions. [2024-06-20 18:03:00,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 298 transitions, 4179 flow [2024-06-20 18:03:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:03:00,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:03:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-20 18:03:00,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6424418604651163 [2024-06-20 18:03:00,059 INFO L175 Difference]: Start difference. First operand has 198 places, 259 transitions, 3237 flow. Second operand 8 states and 221 transitions. [2024-06-20 18:03:00,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 298 transitions, 4179 flow [2024-06-20 18:03:00,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 298 transitions, 4012 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 18:03:00,418 INFO L231 Difference]: Finished difference. Result has 200 places, 261 transitions, 3222 flow [2024-06-20 18:03:00,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3222, PETRI_PLACES=200, PETRI_TRANSITIONS=261} [2024-06-20 18:03:00,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-20 18:03:00,419 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 261 transitions, 3222 flow [2024-06-20 18:03:00,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.333333333333332) internal successors, (165), 9 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:00,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:00,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:00,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 18:03:00,420 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:00,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1396533257, now seen corresponding path program 1 times [2024-06-20 18:03:00,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:00,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85807482] [2024-06-20 18:03:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:00,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:00,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:00,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85807482] [2024-06-20 18:03:00,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85807482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:00,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:00,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:00,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474339226] [2024-06-20 18:03:00,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:00,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:00,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:00,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:00,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:00,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 261 transitions, 3222 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:00,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:00,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:00,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:01,270 INFO L124 PetriNetUnfolderBase]: 2443/4262 cut-off events. [2024-06-20 18:03:01,270 INFO L125 PetriNetUnfolderBase]: For 209166/209166 co-relation queries the response was YES. [2024-06-20 18:03:01,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28573 conditions, 4262 events. 2443/4262 cut-off events. For 209166/209166 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28228 event pairs, 545 based on Foata normal form. 1/4255 useless extension candidates. Maximal degree in co-relation 28479. Up to 3710 conditions per place. [2024-06-20 18:03:01,309 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 225 selfloop transitions, 45 changer transitions 0/280 dead transitions. [2024-06-20 18:03:01,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 280 transitions, 3982 flow [2024-06-20 18:03:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:03:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:03:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-20 18:03:01,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2024-06-20 18:03:01,311 INFO L175 Difference]: Start difference. First operand has 200 places, 261 transitions, 3222 flow. Second operand 5 states and 138 transitions. [2024-06-20 18:03:01,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 280 transitions, 3982 flow [2024-06-20 18:03:01,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 280 transitions, 3845 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 18:03:01,706 INFO L231 Difference]: Finished difference. Result has 201 places, 267 transitions, 3277 flow [2024-06-20 18:03:01,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3085, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3277, PETRI_PLACES=201, PETRI_TRANSITIONS=267} [2024-06-20 18:03:01,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-20 18:03:01,707 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 267 transitions, 3277 flow [2024-06-20 18:03:01,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:01,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:01,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:01,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 18:03:01,707 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:01,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1100874479, now seen corresponding path program 2 times [2024-06-20 18:03:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:01,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859140894] [2024-06-20 18:03:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:01,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:01,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859140894] [2024-06-20 18:03:01,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859140894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:01,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:01,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300434564] [2024-06-20 18:03:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:01,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:01,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:01,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:01,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:01,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:01,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 267 transitions, 3277 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:01,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:01,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:01,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:02,608 INFO L124 PetriNetUnfolderBase]: 2440/4259 cut-off events. [2024-06-20 18:03:02,609 INFO L125 PetriNetUnfolderBase]: For 202107/202107 co-relation queries the response was YES. [2024-06-20 18:03:02,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28005 conditions, 4259 events. 2440/4259 cut-off events. For 202107/202107 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28208 event pairs, 542 based on Foata normal form. 1/4255 useless extension candidates. Maximal degree in co-relation 27909. Up to 3707 conditions per place. [2024-06-20 18:03:02,648 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 221 selfloop transitions, 50 changer transitions 0/281 dead transitions. [2024-06-20 18:03:02,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 281 transitions, 3853 flow [2024-06-20 18:03:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 18:03:02,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079734219269103 [2024-06-20 18:03:02,650 INFO L175 Difference]: Start difference. First operand has 201 places, 267 transitions, 3277 flow. Second operand 7 states and 183 transitions. [2024-06-20 18:03:02,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 281 transitions, 3853 flow [2024-06-20 18:03:03,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 281 transitions, 3813 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 18:03:03,124 INFO L231 Difference]: Finished difference. Result has 206 places, 267 transitions, 3348 flow [2024-06-20 18:03:03,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3348, PETRI_PLACES=206, PETRI_TRANSITIONS=267} [2024-06-20 18:03:03,124 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-20 18:03:03,125 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 267 transitions, 3348 flow [2024-06-20 18:03:03,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:03,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:03,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:03,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 18:03:03,129 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:03,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash 346871213, now seen corresponding path program 1 times [2024-06-20 18:03:03,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:03,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036787472] [2024-06-20 18:03:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:03,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:03,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:03,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036787472] [2024-06-20 18:03:03,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036787472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:03,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:03,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:03,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976144287] [2024-06-20 18:03:03,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:03,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:03,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:03,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:03,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:03,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:03,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 267 transitions, 3348 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:03,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:03,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:03,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:04,025 INFO L124 PetriNetUnfolderBase]: 2448/4270 cut-off events. [2024-06-20 18:03:04,025 INFO L125 PetriNetUnfolderBase]: For 205236/205236 co-relation queries the response was YES. [2024-06-20 18:03:04,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28297 conditions, 4270 events. 2448/4270 cut-off events. For 205236/205236 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28226 event pairs, 456 based on Foata normal form. 2/4264 useless extension candidates. Maximal degree in co-relation 28200. Up to 3735 conditions per place. [2024-06-20 18:03:04,070 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 257 selfloop transitions, 19 changer transitions 0/286 dead transitions. [2024-06-20 18:03:04,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 286 transitions, 4174 flow [2024-06-20 18:03:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:03:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:03:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-20 18:03:04,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6232558139534884 [2024-06-20 18:03:04,071 INFO L175 Difference]: Start difference. First operand has 206 places, 267 transitions, 3348 flow. Second operand 5 states and 134 transitions. [2024-06-20 18:03:04,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 286 transitions, 4174 flow [2024-06-20 18:03:04,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 286 transitions, 4061 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 18:03:04,520 INFO L231 Difference]: Finished difference. Result has 205 places, 271 transitions, 3412 flow [2024-06-20 18:03:04,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3412, PETRI_PLACES=205, PETRI_TRANSITIONS=271} [2024-06-20 18:03:04,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-20 18:03:04,521 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 271 transitions, 3412 flow [2024-06-20 18:03:04,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:04,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:04,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:04,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 18:03:04,521 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:04,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:04,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1100871503, now seen corresponding path program 2 times [2024-06-20 18:03:04,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:04,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645482043] [2024-06-20 18:03:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:04,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:04,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645482043] [2024-06-20 18:03:04,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645482043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:04,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:04,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:04,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723993865] [2024-06-20 18:03:04,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:04,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:04,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:04,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:04,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 271 transitions, 3412 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:04,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:04,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:04,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:05,327 INFO L124 PetriNetUnfolderBase]: 2443/4264 cut-off events. [2024-06-20 18:03:05,327 INFO L125 PetriNetUnfolderBase]: For 202693/202693 co-relation queries the response was YES. [2024-06-20 18:03:05,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28099 conditions, 4264 events. 2443/4264 cut-off events. For 202693/202693 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28259 event pairs, 539 based on Foata normal form. 2/4261 useless extension candidates. Maximal degree in co-relation 28002. Up to 3775 conditions per place. [2024-06-20 18:03:05,367 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 253 selfloop transitions, 18 changer transitions 0/281 dead transitions. [2024-06-20 18:03:05,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 281 transitions, 3978 flow [2024-06-20 18:03:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:03:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:03:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 18:03:05,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6093023255813953 [2024-06-20 18:03:05,368 INFO L175 Difference]: Start difference. First operand has 205 places, 271 transitions, 3412 flow. Second operand 5 states and 131 transitions. [2024-06-20 18:03:05,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 281 transitions, 3978 flow [2024-06-20 18:03:05,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 281 transitions, 3854 flow, removed 56 selfloop flow, removed 1 redundant places. [2024-06-20 18:03:05,754 INFO L231 Difference]: Finished difference. Result has 209 places, 271 transitions, 3329 flow [2024-06-20 18:03:05,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3329, PETRI_PLACES=209, PETRI_TRANSITIONS=271} [2024-06-20 18:03:05,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-20 18:03:05,755 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 271 transitions, 3329 flow [2024-06-20 18:03:05,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:05,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:05,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:05,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 18:03:05,756 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:05,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 754551851, now seen corresponding path program 3 times [2024-06-20 18:03:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:05,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094110486] [2024-06-20 18:03:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:05,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:05,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094110486] [2024-06-20 18:03:05,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094110486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:05,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:05,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:05,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101089179] [2024-06-20 18:03:05,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:05,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:05,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:05,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:05,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:05,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 271 transitions, 3329 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:05,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:05,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:05,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:06,564 INFO L124 PetriNetUnfolderBase]: 2453/4281 cut-off events. [2024-06-20 18:03:06,565 INFO L125 PetriNetUnfolderBase]: For 207784/207784 co-relation queries the response was YES. [2024-06-20 18:03:06,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28179 conditions, 4281 events. 2453/4281 cut-off events. For 207784/207784 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28417 event pairs, 542 based on Foata normal form. 2/4275 useless extension candidates. Maximal degree in co-relation 28080. Up to 3683 conditions per place. [2024-06-20 18:03:06,608 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 221 selfloop transitions, 63 changer transitions 0/294 dead transitions. [2024-06-20 18:03:06,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 294 transitions, 4141 flow [2024-06-20 18:03:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:03:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:03:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 18:03:06,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-20 18:03:06,609 INFO L175 Difference]: Start difference. First operand has 209 places, 271 transitions, 3329 flow. Second operand 6 states and 161 transitions. [2024-06-20 18:03:06,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 294 transitions, 4141 flow [2024-06-20 18:03:07,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 294 transitions, 4093 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 18:03:07,054 INFO L231 Difference]: Finished difference. Result has 211 places, 277 transitions, 3507 flow [2024-06-20 18:03:07,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3281, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3507, PETRI_PLACES=211, PETRI_TRANSITIONS=277} [2024-06-20 18:03:07,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-20 18:03:07,055 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 277 transitions, 3507 flow [2024-06-20 18:03:07,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:07,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:07,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:07,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 18:03:07,056 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:07,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:07,056 INFO L85 PathProgramCache]: Analyzing trace with hash 765979691, now seen corresponding path program 4 times [2024-06-20 18:03:07,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:07,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898411308] [2024-06-20 18:03:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:07,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:07,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:07,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898411308] [2024-06-20 18:03:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898411308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:07,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124592435] [2024-06-20 18:03:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:07,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:07,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:07,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:07,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 277 transitions, 3507 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:07,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:07,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:07,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:07,840 INFO L124 PetriNetUnfolderBase]: 2455/4286 cut-off events. [2024-06-20 18:03:07,840 INFO L125 PetriNetUnfolderBase]: For 213079/213079 co-relation queries the response was YES. [2024-06-20 18:03:07,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28407 conditions, 4286 events. 2455/4286 cut-off events. For 213079/213079 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28436 event pairs, 542 based on Foata normal form. 2/4280 useless extension candidates. Maximal degree in co-relation 28307. Up to 3686 conditions per place. [2024-06-20 18:03:07,881 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 217 selfloop transitions, 67 changer transitions 0/294 dead transitions. [2024-06-20 18:03:07,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 294 transitions, 4275 flow [2024-06-20 18:03:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:03:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:03:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 18:03:07,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6162790697674418 [2024-06-20 18:03:07,883 INFO L175 Difference]: Start difference. First operand has 211 places, 277 transitions, 3507 flow. Second operand 6 states and 159 transitions. [2024-06-20 18:03:07,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 294 transitions, 4275 flow [2024-06-20 18:03:08,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 294 transitions, 4088 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 18:03:08,337 INFO L231 Difference]: Finished difference. Result has 213 places, 280 transitions, 3516 flow [2024-06-20 18:03:08,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3516, PETRI_PLACES=213, PETRI_TRANSITIONS=280} [2024-06-20 18:03:08,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-20 18:03:08,338 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 280 transitions, 3516 flow [2024-06-20 18:03:08,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:08,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:08,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:08,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 18:03:08,338 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:08,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:08,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2037148265, now seen corresponding path program 5 times [2024-06-20 18:03:08,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:08,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895414877] [2024-06-20 18:03:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:08,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:08,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:08,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895414877] [2024-06-20 18:03:08,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895414877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:08,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:08,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:08,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435714696] [2024-06-20 18:03:08,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:08,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:08,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:08,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:08,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:08,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:08,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 280 transitions, 3516 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:08,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:08,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:08,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:09,166 INFO L124 PetriNetUnfolderBase]: 2452/4267 cut-off events. [2024-06-20 18:03:09,166 INFO L125 PetriNetUnfolderBase]: For 216652/216652 co-relation queries the response was YES. [2024-06-20 18:03:09,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28269 conditions, 4267 events. 2452/4267 cut-off events. For 216652/216652 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28259 event pairs, 570 based on Foata normal form. 1/4260 useless extension candidates. Maximal degree in co-relation 28169. Up to 3683 conditions per place. [2024-06-20 18:03:09,204 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 212 selfloop transitions, 68 changer transitions 0/290 dead transitions. [2024-06-20 18:03:09,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 290 transitions, 4100 flow [2024-06-20 18:03:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:03:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:03:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 18:03:09,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-20 18:03:09,205 INFO L175 Difference]: Start difference. First operand has 213 places, 280 transitions, 3516 flow. Second operand 6 states and 156 transitions. [2024-06-20 18:03:09,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 290 transitions, 4100 flow [2024-06-20 18:03:09,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 290 transitions, 3983 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 18:03:09,648 INFO L231 Difference]: Finished difference. Result has 216 places, 280 transitions, 3541 flow [2024-06-20 18:03:09,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3541, PETRI_PLACES=216, PETRI_TRANSITIONS=280} [2024-06-20 18:03:09,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-20 18:03:09,648 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 280 transitions, 3541 flow [2024-06-20 18:03:09,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:09,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:09,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:09,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 18:03:09,649 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:09,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1367053705, now seen corresponding path program 1 times [2024-06-20 18:03:09,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:09,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064230592] [2024-06-20 18:03:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:09,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:09,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064230592] [2024-06-20 18:03:09,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064230592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:09,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:09,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:09,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962950454] [2024-06-20 18:03:09,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:09,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:09,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:09,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:09,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 280 transitions, 3541 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:09,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:09,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:09,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:10,621 INFO L124 PetriNetUnfolderBase]: 2457/4296 cut-off events. [2024-06-20 18:03:10,621 INFO L125 PetriNetUnfolderBase]: For 223214/223214 co-relation queries the response was YES. [2024-06-20 18:03:10,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28449 conditions, 4296 events. 2457/4296 cut-off events. For 223214/223214 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28538 event pairs, 533 based on Foata normal form. 1/4290 useless extension candidates. Maximal degree in co-relation 28347. Up to 3758 conditions per place. [2024-06-20 18:03:10,664 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 257 selfloop transitions, 40 changer transitions 0/306 dead transitions. [2024-06-20 18:03:10,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 306 transitions, 4231 flow [2024-06-20 18:03:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 18:03:10,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-20 18:03:10,665 INFO L175 Difference]: Start difference. First operand has 216 places, 280 transitions, 3541 flow. Second operand 7 states and 181 transitions. [2024-06-20 18:03:10,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 306 transitions, 4231 flow [2024-06-20 18:03:11,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 306 transitions, 3944 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 18:03:11,148 INFO L231 Difference]: Finished difference. Result has 215 places, 283 transitions, 3384 flow [2024-06-20 18:03:11,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3384, PETRI_PLACES=215, PETRI_TRANSITIONS=283} [2024-06-20 18:03:11,148 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-20 18:03:11,149 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 283 transitions, 3384 flow [2024-06-20 18:03:11,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:11,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:11,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:11,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 18:03:11,149 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:11,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1221317655, now seen corresponding path program 2 times [2024-06-20 18:03:11,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:11,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214390491] [2024-06-20 18:03:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:11,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:11,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214390491] [2024-06-20 18:03:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214390491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:11,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:11,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961175208] [2024-06-20 18:03:11,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:11,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:11,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 283 transitions, 3384 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:11,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:11,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:11,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:12,145 INFO L124 PetriNetUnfolderBase]: 2454/4294 cut-off events. [2024-06-20 18:03:12,145 INFO L125 PetriNetUnfolderBase]: For 226461/226461 co-relation queries the response was YES. [2024-06-20 18:03:12,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28343 conditions, 4294 events. 2454/4294 cut-off events. For 226461/226461 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28520 event pairs, 523 based on Foata normal form. 1/4290 useless extension candidates. Maximal degree in co-relation 28241. Up to 3690 conditions per place. [2024-06-20 18:03:12,190 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 238 selfloop transitions, 65 changer transitions 0/312 dead transitions. [2024-06-20 18:03:12,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 312 transitions, 4182 flow [2024-06-20 18:03:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:03:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:03:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-20 18:03:12,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58656330749354 [2024-06-20 18:03:12,192 INFO L175 Difference]: Start difference. First operand has 215 places, 283 transitions, 3384 flow. Second operand 9 states and 227 transitions. [2024-06-20 18:03:12,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 312 transitions, 4182 flow [2024-06-20 18:03:12,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 312 transitions, 4088 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 18:03:12,644 INFO L231 Difference]: Finished difference. Result has 219 places, 283 transitions, 3426 flow [2024-06-20 18:03:12,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3426, PETRI_PLACES=219, PETRI_TRANSITIONS=283} [2024-06-20 18:03:12,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-20 18:03:12,645 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 283 transitions, 3426 flow [2024-06-20 18:03:12,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:12,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:12,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:12,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 18:03:12,646 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:12,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:12,646 INFO L85 PathProgramCache]: Analyzing trace with hash 987222967, now seen corresponding path program 3 times [2024-06-20 18:03:12,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:12,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743003063] [2024-06-20 18:03:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:12,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743003063] [2024-06-20 18:03:12,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743003063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:12,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:12,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843680812] [2024-06-20 18:03:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:12,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:12,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:12,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 283 transitions, 3426 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:12,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:12,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:12,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:13,662 INFO L124 PetriNetUnfolderBase]: 2459/4302 cut-off events. [2024-06-20 18:03:13,662 INFO L125 PetriNetUnfolderBase]: For 232370/232370 co-relation queries the response was YES. [2024-06-20 18:03:13,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28586 conditions, 4302 events. 2459/4302 cut-off events. For 232370/232370 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28585 event pairs, 531 based on Foata normal form. 1/4298 useless extension candidates. Maximal degree in co-relation 28483. Up to 3696 conditions per place. [2024-06-20 18:03:13,702 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 229 selfloop transitions, 68 changer transitions 0/306 dead transitions. [2024-06-20 18:03:13,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 306 transitions, 4232 flow [2024-06-20 18:03:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:03:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:03:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 18:03:13,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633074935400517 [2024-06-20 18:03:13,704 INFO L175 Difference]: Start difference. First operand has 219 places, 283 transitions, 3426 flow. Second operand 9 states and 218 transitions. [2024-06-20 18:03:13,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 306 transitions, 4232 flow [2024-06-20 18:03:14,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 306 transitions, 4114 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 18:03:14,210 INFO L231 Difference]: Finished difference. Result has 222 places, 286 transitions, 3492 flow [2024-06-20 18:03:14,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3492, PETRI_PLACES=222, PETRI_TRANSITIONS=286} [2024-06-20 18:03:14,210 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-20 18:03:14,211 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 286 transitions, 3492 flow [2024-06-20 18:03:14,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:14,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:14,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:14,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 18:03:14,211 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:14,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1191565881, now seen corresponding path program 1 times [2024-06-20 18:03:14,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:14,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562412991] [2024-06-20 18:03:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:14,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:14,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:14,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562412991] [2024-06-20 18:03:14,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562412991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:14,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:14,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:14,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975604378] [2024-06-20 18:03:14,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:14,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:14,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:14,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 286 transitions, 3492 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:14,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:14,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:14,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:15,038 INFO L124 PetriNetUnfolderBase]: 2472/4322 cut-off events. [2024-06-20 18:03:15,039 INFO L125 PetriNetUnfolderBase]: For 241199/241199 co-relation queries the response was YES. [2024-06-20 18:03:15,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28894 conditions, 4322 events. 2472/4322 cut-off events. For 241199/241199 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28753 event pairs, 535 based on Foata normal form. 1/4316 useless extension candidates. Maximal degree in co-relation 28791. Up to 3741 conditions per place. [2024-06-20 18:03:15,084 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 246 selfloop transitions, 54 changer transitions 0/310 dead transitions. [2024-06-20 18:03:15,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 310 transitions, 4464 flow [2024-06-20 18:03:15,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:03:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:03:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-20 18:03:15,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317829457364341 [2024-06-20 18:03:15,085 INFO L175 Difference]: Start difference. First operand has 222 places, 286 transitions, 3492 flow. Second operand 6 states and 163 transitions. [2024-06-20 18:03:15,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 310 transitions, 4464 flow [2024-06-20 18:03:15,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 310 transitions, 4346 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 18:03:15,619 INFO L231 Difference]: Finished difference. Result has 222 places, 292 transitions, 3569 flow [2024-06-20 18:03:15,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3569, PETRI_PLACES=222, PETRI_TRANSITIONS=292} [2024-06-20 18:03:15,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-20 18:03:15,619 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 292 transitions, 3569 flow [2024-06-20 18:03:15,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:15,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:15,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:15,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 18:03:15,620 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:15,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash -938717623, now seen corresponding path program 2 times [2024-06-20 18:03:15,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:15,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097808093] [2024-06-20 18:03:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:15,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:15,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:15,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097808093] [2024-06-20 18:03:15,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097808093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:15,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:15,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:15,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505282096] [2024-06-20 18:03:15,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:15,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:15,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:15,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:15,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:15,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 292 transitions, 3569 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:15,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:15,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:15,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:16,490 INFO L124 PetriNetUnfolderBase]: 2477/4331 cut-off events. [2024-06-20 18:03:16,490 INFO L125 PetriNetUnfolderBase]: For 248205/248205 co-relation queries the response was YES. [2024-06-20 18:03:16,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29029 conditions, 4331 events. 2477/4331 cut-off events. For 248205/248205 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28781 event pairs, 535 based on Foata normal form. 1/4325 useless extension candidates. Maximal degree in co-relation 28925. Up to 3747 conditions per place. [2024-06-20 18:03:16,536 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 245 selfloop transitions, 55 changer transitions 0/310 dead transitions. [2024-06-20 18:03:16,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 310 transitions, 4377 flow [2024-06-20 18:03:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 18:03:16,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-20 18:03:16,538 INFO L175 Difference]: Start difference. First operand has 222 places, 292 transitions, 3569 flow. Second operand 7 states and 180 transitions. [2024-06-20 18:03:16,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 310 transitions, 4377 flow [2024-06-20 18:03:17,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 310 transitions, 4299 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 18:03:17,175 INFO L231 Difference]: Finished difference. Result has 227 places, 295 transitions, 3653 flow [2024-06-20 18:03:17,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3653, PETRI_PLACES=227, PETRI_TRANSITIONS=295} [2024-06-20 18:03:17,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-20 18:03:17,176 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 295 transitions, 3653 flow [2024-06-20 18:03:17,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:17,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:17,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:17,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 18:03:17,177 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:17,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:17,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1711952517, now seen corresponding path program 4 times [2024-06-20 18:03:17,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:17,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140793056] [2024-06-20 18:03:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:17,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:17,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:17,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140793056] [2024-06-20 18:03:17,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140793056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:17,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:17,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:17,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166645928] [2024-06-20 18:03:17,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:17,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:17,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:17,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:17,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:17,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:17,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 295 transitions, 3653 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:17,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:17,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:17,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:18,150 INFO L124 PetriNetUnfolderBase]: 2474/4320 cut-off events. [2024-06-20 18:03:18,150 INFO L125 PetriNetUnfolderBase]: For 254161/254161 co-relation queries the response was YES. [2024-06-20 18:03:18,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29070 conditions, 4320 events. 2474/4320 cut-off events. For 254161/254161 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28700 event pairs, 544 based on Foata normal form. 1/4316 useless extension candidates. Maximal degree in co-relation 28964. Up to 3718 conditions per place. [2024-06-20 18:03:18,192 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 231 selfloop transitions, 71 changer transitions 0/311 dead transitions. [2024-06-20 18:03:18,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 311 transitions, 4295 flow [2024-06-20 18:03:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:03:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:03:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 18:03:18,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 18:03:18,193 INFO L175 Difference]: Start difference. First operand has 227 places, 295 transitions, 3653 flow. Second operand 9 states and 215 transitions. [2024-06-20 18:03:18,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 311 transitions, 4295 flow [2024-06-20 18:03:18,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 311 transitions, 4157 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 18:03:18,805 INFO L231 Difference]: Finished difference. Result has 231 places, 295 transitions, 3663 flow [2024-06-20 18:03:18,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3663, PETRI_PLACES=231, PETRI_TRANSITIONS=295} [2024-06-20 18:03:18,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-20 18:03:18,805 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 295 transitions, 3663 flow [2024-06-20 18:03:18,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:18,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:18,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:18,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 18:03:18,806 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:18,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:18,806 INFO L85 PathProgramCache]: Analyzing trace with hash -779209813, now seen corresponding path program 3 times [2024-06-20 18:03:18,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:18,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085749001] [2024-06-20 18:03:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:18,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:19,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:19,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085749001] [2024-06-20 18:03:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085749001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:19,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:19,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:19,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488211927] [2024-06-20 18:03:19,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:19,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:19,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:19,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 295 transitions, 3663 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:19,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:19,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:19,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:19,641 INFO L124 PetriNetUnfolderBase]: 2479/4333 cut-off events. [2024-06-20 18:03:19,641 INFO L125 PetriNetUnfolderBase]: For 260974/260974 co-relation queries the response was YES. [2024-06-20 18:03:19,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29260 conditions, 4333 events. 2479/4333 cut-off events. For 260974/260974 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28810 event pairs, 540 based on Foata normal form. 1/4323 useless extension candidates. Maximal degree in co-relation 29154. Up to 3749 conditions per place. [2024-06-20 18:03:19,686 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 248 selfloop transitions, 61 changer transitions 0/319 dead transitions. [2024-06-20 18:03:19,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 319 transitions, 4636 flow [2024-06-20 18:03:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:03:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:03:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 18:03:19,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472868217054264 [2024-06-20 18:03:19,698 INFO L175 Difference]: Start difference. First operand has 231 places, 295 transitions, 3663 flow. Second operand 6 states and 167 transitions. [2024-06-20 18:03:19,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 319 transitions, 4636 flow [2024-06-20 18:03:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 319 transitions, 4488 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 18:03:20,208 INFO L231 Difference]: Finished difference. Result has 230 places, 298 transitions, 3686 flow [2024-06-20 18:03:20,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3686, PETRI_PLACES=230, PETRI_TRANSITIONS=298} [2024-06-20 18:03:20,209 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-20 18:03:20,213 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 298 transitions, 3686 flow [2024-06-20 18:03:20,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:20,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:20,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:20,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 18:03:20,214 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:20,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1647298837, now seen corresponding path program 4 times [2024-06-20 18:03:20,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:20,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524878730] [2024-06-20 18:03:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:20,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:20,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:20,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524878730] [2024-06-20 18:03:20,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524878730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:20,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:20,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:20,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718624317] [2024-06-20 18:03:20,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:20,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:20,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:20,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:20,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 298 transitions, 3686 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:20,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:20,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:21,436 INFO L124 PetriNetUnfolderBase]: 2484/4335 cut-off events. [2024-06-20 18:03:21,436 INFO L125 PetriNetUnfolderBase]: For 268161/268161 co-relation queries the response was YES. [2024-06-20 18:03:21,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29382 conditions, 4335 events. 2484/4335 cut-off events. For 268161/268161 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28905 event pairs, 551 based on Foata normal form. 1/4331 useless extension candidates. Maximal degree in co-relation 29275. Up to 3755 conditions per place. [2024-06-20 18:03:21,482 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 240 selfloop transitions, 63 changer transitions 0/313 dead transitions. [2024-06-20 18:03:21,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 4501 flow [2024-06-20 18:03:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 18:03:21,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-20 18:03:21,483 INFO L175 Difference]: Start difference. First operand has 230 places, 298 transitions, 3686 flow. Second operand 7 states and 179 transitions. [2024-06-20 18:03:21,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 4501 flow [2024-06-20 18:03:22,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 313 transitions, 4318 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 18:03:22,005 INFO L231 Difference]: Finished difference. Result has 233 places, 301 transitions, 3684 flow [2024-06-20 18:03:22,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3509, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3684, PETRI_PLACES=233, PETRI_TRANSITIONS=301} [2024-06-20 18:03:22,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-20 18:03:22,006 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 301 transitions, 3684 flow [2024-06-20 18:03:22,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:22,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:22,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:22,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 18:03:22,007 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:22,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1259682773, now seen corresponding path program 5 times [2024-06-20 18:03:22,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:22,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253548084] [2024-06-20 18:03:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:22,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:22,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253548084] [2024-06-20 18:03:22,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253548084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:22,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:22,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:22,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496632096] [2024-06-20 18:03:22,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:22,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:22,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:22,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:22,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 301 transitions, 3684 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:22,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:22,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:22,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:22,876 INFO L124 PetriNetUnfolderBase]: 2489/4351 cut-off events. [2024-06-20 18:03:22,876 INFO L125 PetriNetUnfolderBase]: For 274477/274477 co-relation queries the response was YES. [2024-06-20 18:03:22,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29523 conditions, 4351 events. 2489/4351 cut-off events. For 274477/274477 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28920 event pairs, 540 based on Foata normal form. 1/4341 useless extension candidates. Maximal degree in co-relation 29416. Up to 3761 conditions per place. [2024-06-20 18:03:22,923 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 243 selfloop transitions, 69 changer transitions 0/322 dead transitions. [2024-06-20 18:03:22,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 322 transitions, 4543 flow [2024-06-20 18:03:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:03:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:03:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-20 18:03:22,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-20 18:03:22,924 INFO L175 Difference]: Start difference. First operand has 233 places, 301 transitions, 3684 flow. Second operand 6 states and 162 transitions. [2024-06-20 18:03:22,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 322 transitions, 4543 flow [2024-06-20 18:03:23,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 322 transitions, 4433 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 18:03:23,627 INFO L231 Difference]: Finished difference. Result has 235 places, 305 transitions, 3777 flow [2024-06-20 18:03:23,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3777, PETRI_PLACES=235, PETRI_TRANSITIONS=305} [2024-06-20 18:03:23,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-20 18:03:23,628 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 305 transitions, 3777 flow [2024-06-20 18:03:23,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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) [2024-06-20 18:03:23,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:23,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:23,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 18:03:23,629 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:23,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash 137096647, now seen corresponding path program 6 times [2024-06-20 18:03:23,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:23,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30594170] [2024-06-20 18:03:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:23,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:23,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:23,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30594170] [2024-06-20 18:03:23,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30594170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:23,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:23,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436598727] [2024-06-20 18:03:23,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:23,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:23,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:23,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 305 transitions, 3777 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:23,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:23,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:23,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:24,497 INFO L124 PetriNetUnfolderBase]: 2486/4343 cut-off events. [2024-06-20 18:03:24,498 INFO L125 PetriNetUnfolderBase]: For 280084/280084 co-relation queries the response was YES. [2024-06-20 18:03:24,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29539 conditions, 4343 events. 2486/4343 cut-off events. For 280084/280084 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28938 event pairs, 548 based on Foata normal form. 1/4339 useless extension candidates. Maximal degree in co-relation 29430. Up to 3758 conditions per place. [2024-06-20 18:03:24,542 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 239 selfloop transitions, 70 changer transitions 0/319 dead transitions. [2024-06-20 18:03:24,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 319 transitions, 4563 flow [2024-06-20 18:03:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:03:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:03:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 18:03:24,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710594315245479 [2024-06-20 18:03:24,543 INFO L175 Difference]: Start difference. First operand has 235 places, 305 transitions, 3777 flow. Second operand 9 states and 221 transitions. [2024-06-20 18:03:24,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 319 transitions, 4563 flow [2024-06-20 18:03:25,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 319 transitions, 4441 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 18:03:25,195 INFO L231 Difference]: Finished difference. Result has 242 places, 305 transitions, 3801 flow [2024-06-20 18:03:25,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3801, PETRI_PLACES=242, PETRI_TRANSITIONS=305} [2024-06-20 18:03:25,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-20 18:03:25,196 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 305 transitions, 3801 flow [2024-06-20 18:03:25,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:25,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:25,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:25,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 18:03:25,196 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:25,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash 425793097, now seen corresponding path program 7 times [2024-06-20 18:03:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:25,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574004126] [2024-06-20 18:03:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:25,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:25,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574004126] [2024-06-20 18:03:25,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574004126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:25,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:25,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:25,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199629301] [2024-06-20 18:03:25,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:25,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:25,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:25,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:25,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 305 transitions, 3801 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:25,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:25,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:25,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:26,110 INFO L124 PetriNetUnfolderBase]: 2483/4339 cut-off events. [2024-06-20 18:03:26,110 INFO L125 PetriNetUnfolderBase]: For 285339/285339 co-relation queries the response was YES. [2024-06-20 18:03:26,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29558 conditions, 4339 events. 2483/4339 cut-off events. For 285339/285339 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28919 event pairs, 548 based on Foata normal form. 1/4335 useless extension candidates. Maximal degree in co-relation 29448. Up to 3755 conditions per place. [2024-06-20 18:03:26,151 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 237 selfloop transitions, 69 changer transitions 0/316 dead transitions. [2024-06-20 18:03:26,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 316 transitions, 4439 flow [2024-06-20 18:03:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 18:03:26,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-20 18:03:26,153 INFO L175 Difference]: Start difference. First operand has 242 places, 305 transitions, 3801 flow. Second operand 7 states and 177 transitions. [2024-06-20 18:03:26,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 316 transitions, 4439 flow [2024-06-20 18:03:26,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 316 transitions, 4168 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-20 18:03:26,952 INFO L231 Difference]: Finished difference. Result has 240 places, 305 transitions, 3674 flow [2024-06-20 18:03:26,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3674, PETRI_PLACES=240, PETRI_TRANSITIONS=305} [2024-06-20 18:03:26,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-20 18:03:26,953 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 305 transitions, 3674 flow [2024-06-20 18:03:26,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:26,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:26,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 18:03:26,954 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:26,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash 483936045, now seen corresponding path program 1 times [2024-06-20 18:03:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:26,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531106613] [2024-06-20 18:03:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:27,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531106613] [2024-06-20 18:03:27,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531106613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:27,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:27,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:03:27,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617843242] [2024-06-20 18:03:27,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:27,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:03:27,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:27,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:03:27,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:03:27,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:03:27,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 305 transitions, 3674 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 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) [2024-06-20 18:03:27,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:27,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:03:27,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:27,842 INFO L124 PetriNetUnfolderBase]: 2388/4226 cut-off events. [2024-06-20 18:03:27,843 INFO L125 PetriNetUnfolderBase]: For 313196/313196 co-relation queries the response was YES. [2024-06-20 18:03:27,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29116 conditions, 4226 events. 2388/4226 cut-off events. For 313196/313196 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28406 event pairs, 504 based on Foata normal form. 10/4186 useless extension candidates. Maximal degree in co-relation 29005. Up to 3529 conditions per place. [2024-06-20 18:03:27,890 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 248 selfloop transitions, 31 changer transitions 0/326 dead transitions. [2024-06-20 18:03:27,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 326 transitions, 4310 flow [2024-06-20 18:03:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:03:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:03:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-20 18:03:27,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2024-06-20 18:03:27,891 INFO L175 Difference]: Start difference. First operand has 240 places, 305 transitions, 3674 flow. Second operand 6 states and 165 transitions. [2024-06-20 18:03:27,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 326 transitions, 4310 flow [2024-06-20 18:03:28,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 326 transitions, 4172 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 18:03:28,623 INFO L231 Difference]: Finished difference. Result has 240 places, 306 transitions, 3620 flow [2024-06-20 18:03:28,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3620, PETRI_PLACES=240, PETRI_TRANSITIONS=306} [2024-06-20 18:03:28,624 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-20 18:03:28,624 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 306 transitions, 3620 flow [2024-06-20 18:03:28,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 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) [2024-06-20 18:03:28,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:28,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:28,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 18:03:28,625 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:28,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:28,625 INFO L85 PathProgramCache]: Analyzing trace with hash -395965651, now seen corresponding path program 2 times [2024-06-20 18:03:28,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:28,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479303678] [2024-06-20 18:03:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:28,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:28,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:28,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479303678] [2024-06-20 18:03:28,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479303678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:28,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:28,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:28,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692525929] [2024-06-20 18:03:28,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:28,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:28,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:28,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:03:28,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 306 transitions, 3620 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:28,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:28,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:03:28,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:29,564 INFO L124 PetriNetUnfolderBase]: 2419/4267 cut-off events. [2024-06-20 18:03:29,564 INFO L125 PetriNetUnfolderBase]: For 321074/321074 co-relation queries the response was YES. [2024-06-20 18:03:29,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29410 conditions, 4267 events. 2419/4267 cut-off events. For 321074/321074 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28829 event pairs, 514 based on Foata normal form. 9/4224 useless extension candidates. Maximal degree in co-relation 29298. Up to 3578 conditions per place. [2024-06-20 18:03:29,612 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 244 selfloop transitions, 31 changer transitions 0/322 dead transitions. [2024-06-20 18:03:29,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 322 transitions, 4236 flow [2024-06-20 18:03:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 18:03:29,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-20 18:03:29,613 INFO L175 Difference]: Start difference. First operand has 240 places, 306 transitions, 3620 flow. Second operand 7 states and 181 transitions. [2024-06-20 18:03:29,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 322 transitions, 4236 flow [2024-06-20 18:03:30,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 322 transitions, 4170 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 18:03:30,262 INFO L231 Difference]: Finished difference. Result has 243 places, 307 transitions, 3640 flow [2024-06-20 18:03:30,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3554, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3640, PETRI_PLACES=243, PETRI_TRANSITIONS=307} [2024-06-20 18:03:30,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-20 18:03:30,263 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 307 transitions, 3640 flow [2024-06-20 18:03:30,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:30,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:30,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:30,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 18:03:30,263 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:30,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 442945769, now seen corresponding path program 3 times [2024-06-20 18:03:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:30,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982277192] [2024-06-20 18:03:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:30,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:30,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982277192] [2024-06-20 18:03:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982277192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:30,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:30,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:30,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382351474] [2024-06-20 18:03:30,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:30,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:30,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:30,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:30,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:30,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-20 18:03:30,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 307 transitions, 3640 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:30,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:30,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-20 18:03:30,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:31,179 INFO L124 PetriNetUnfolderBase]: 2421/4273 cut-off events. [2024-06-20 18:03:31,180 INFO L125 PetriNetUnfolderBase]: For 313753/313753 co-relation queries the response was YES. [2024-06-20 18:03:31,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29210 conditions, 4273 events. 2421/4273 cut-off events. For 313753/313753 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28866 event pairs, 508 based on Foata normal form. 8/4229 useless extension candidates. Maximal degree in co-relation 29097. Up to 3518 conditions per place. [2024-06-20 18:03:31,228 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 246 selfloop transitions, 34 changer transitions 0/327 dead transitions. [2024-06-20 18:03:31,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 327 transitions, 4288 flow [2024-06-20 18:03:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:03:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:03:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 18:03:31,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-20 18:03:31,230 INFO L175 Difference]: Start difference. First operand has 243 places, 307 transitions, 3640 flow. Second operand 8 states and 205 transitions. [2024-06-20 18:03:31,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 327 transitions, 4288 flow [2024-06-20 18:03:31,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 327 transitions, 4220 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 18:03:31,846 INFO L231 Difference]: Finished difference. Result has 246 places, 308 transitions, 3664 flow [2024-06-20 18:03:31,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3664, PETRI_PLACES=246, PETRI_TRANSITIONS=308} [2024-06-20 18:03:31,846 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-20 18:03:31,847 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 308 transitions, 3664 flow [2024-06-20 18:03:31,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:31,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:31,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:31,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 18:03:31,847 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:31,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1229167159, now seen corresponding path program 1 times [2024-06-20 18:03:31,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:31,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566928872] [2024-06-20 18:03:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:32,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:32,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566928872] [2024-06-20 18:03:32,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566928872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:32,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:32,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:32,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881886131] [2024-06-20 18:03:32,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:32,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:32,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:32,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:32,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:32,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 308 transitions, 3664 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:32,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:32,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:32,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:32,897 INFO L124 PetriNetUnfolderBase]: 2573/4514 cut-off events. [2024-06-20 18:03:32,898 INFO L125 PetriNetUnfolderBase]: For 311623/311623 co-relation queries the response was YES. [2024-06-20 18:03:32,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30369 conditions, 4514 events. 2573/4514 cut-off events. For 311623/311623 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30306 event pairs, 468 based on Foata normal form. 4/4517 useless extension candidates. Maximal degree in co-relation 30254. Up to 3855 conditions per place. [2024-06-20 18:03:32,952 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 292 selfloop transitions, 33 changer transitions 0/334 dead transitions. [2024-06-20 18:03:32,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 334 transitions, 4567 flow [2024-06-20 18:03:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 18:03:32,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-20 18:03:32,953 INFO L175 Difference]: Start difference. First operand has 246 places, 308 transitions, 3664 flow. Second operand 7 states and 179 transitions. [2024-06-20 18:03:32,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 334 transitions, 4567 flow [2024-06-20 18:03:33,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 334 transitions, 4489 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 18:03:33,785 INFO L231 Difference]: Finished difference. Result has 247 places, 311 transitions, 3713 flow [2024-06-20 18:03:33,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3713, PETRI_PLACES=247, PETRI_TRANSITIONS=311} [2024-06-20 18:03:33,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-20 18:03:33,786 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 311 transitions, 3713 flow [2024-06-20 18:03:33,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:33,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:33,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:33,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 18:03:33,787 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:33,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:33,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1466717847, now seen corresponding path program 2 times [2024-06-20 18:03:33,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:33,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359301071] [2024-06-20 18:03:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:33,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:34,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359301071] [2024-06-20 18:03:34,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359301071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:34,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:34,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:34,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074033902] [2024-06-20 18:03:34,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:34,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:34,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:34,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:34,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 311 transitions, 3713 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:34,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:34,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:34,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:34,861 INFO L124 PetriNetUnfolderBase]: 2553/4473 cut-off events. [2024-06-20 18:03:34,861 INFO L125 PetriNetUnfolderBase]: For 308023/308023 co-relation queries the response was YES. [2024-06-20 18:03:34,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29905 conditions, 4473 events. 2553/4473 cut-off events. For 308023/308023 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29998 event pairs, 529 based on Foata normal form. 4/4476 useless extension candidates. Maximal degree in co-relation 29789. Up to 3929 conditions per place. [2024-06-20 18:03:34,903 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 292 selfloop transitions, 28 changer transitions 0/329 dead transitions. [2024-06-20 18:03:34,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 329 transitions, 4397 flow [2024-06-20 18:03:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 18:03:34,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780730897009967 [2024-06-20 18:03:34,904 INFO L175 Difference]: Start difference. First operand has 247 places, 311 transitions, 3713 flow. Second operand 7 states and 174 transitions. [2024-06-20 18:03:34,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 329 transitions, 4397 flow [2024-06-20 18:03:35,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 329 transitions, 4296 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 18:03:35,631 INFO L231 Difference]: Finished difference. Result has 250 places, 311 transitions, 3674 flow [2024-06-20 18:03:35,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3674, PETRI_PLACES=250, PETRI_TRANSITIONS=311} [2024-06-20 18:03:35,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-20 18:03:35,632 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 311 transitions, 3674 flow [2024-06-20 18:03:35,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:35,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:35,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:35,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 18:03:35,633 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:35,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1226305239, now seen corresponding path program 1 times [2024-06-20 18:03:35,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:35,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972570592] [2024-06-20 18:03:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:35,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:35,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:35,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972570592] [2024-06-20 18:03:35,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972570592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:35,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:35,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:35,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72046288] [2024-06-20 18:03:35,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:35,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:35,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:35,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:35,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:35,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 311 transitions, 3674 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:35,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:35,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:35,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:36,610 INFO L124 PetriNetUnfolderBase]: 2581/4522 cut-off events. [2024-06-20 18:03:36,610 INFO L125 PetriNetUnfolderBase]: For 312944/312944 co-relation queries the response was YES. [2024-06-20 18:03:36,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30131 conditions, 4522 events. 2581/4522 cut-off events. For 312944/312944 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30418 event pairs, 528 based on Foata normal form. 2/4523 useless extension candidates. Maximal degree in co-relation 30014. Up to 3956 conditions per place. [2024-06-20 18:03:36,660 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 293 selfloop transitions, 40 changer transitions 0/342 dead transitions. [2024-06-20 18:03:36,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 342 transitions, 4673 flow [2024-06-20 18:03:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 18:03:36,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-20 18:03:36,661 INFO L175 Difference]: Start difference. First operand has 250 places, 311 transitions, 3674 flow. Second operand 7 states and 177 transitions. [2024-06-20 18:03:36,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 342 transitions, 4673 flow [2024-06-20 18:03:37,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 342 transitions, 4575 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 18:03:37,557 INFO L231 Difference]: Finished difference. Result has 250 places, 324 transitions, 3848 flow [2024-06-20 18:03:37,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3576, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3848, PETRI_PLACES=250, PETRI_TRANSITIONS=324} [2024-06-20 18:03:37,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-20 18:03:37,558 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 324 transitions, 3848 flow [2024-06-20 18:03:37,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:37,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:37,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:37,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 18:03:37,558 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:37,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:37,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1182991033, now seen corresponding path program 3 times [2024-06-20 18:03:37,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:37,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645819010] [2024-06-20 18:03:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:37,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:37,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645819010] [2024-06-20 18:03:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645819010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:37,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:37,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:37,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883253512] [2024-06-20 18:03:37,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:37,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:37,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:37,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:37,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 324 transitions, 3848 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:37,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:37,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:37,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:38,608 INFO L124 PetriNetUnfolderBase]: 2597/4549 cut-off events. [2024-06-20 18:03:38,608 INFO L125 PetriNetUnfolderBase]: For 330482/330482 co-relation queries the response was YES. [2024-06-20 18:03:38,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30991 conditions, 4549 events. 2597/4549 cut-off events. For 330482/330482 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30653 event pairs, 538 based on Foata normal form. 4/4548 useless extension candidates. Maximal degree in co-relation 30872. Up to 3892 conditions per place. [2024-06-20 18:03:38,662 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 267 selfloop transitions, 71 changer transitions 0/347 dead transitions. [2024-06-20 18:03:38,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 347 transitions, 4670 flow [2024-06-20 18:03:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:03:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:03:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 18:03:38,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633074935400517 [2024-06-20 18:03:38,664 INFO L175 Difference]: Start difference. First operand has 250 places, 324 transitions, 3848 flow. Second operand 9 states and 218 transitions. [2024-06-20 18:03:38,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 347 transitions, 4670 flow [2024-06-20 18:03:39,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 347 transitions, 4606 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 18:03:39,440 INFO L231 Difference]: Finished difference. Result has 256 places, 327 transitions, 4036 flow [2024-06-20 18:03:39,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3784, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4036, PETRI_PLACES=256, PETRI_TRANSITIONS=327} [2024-06-20 18:03:39,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-20 18:03:39,441 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 327 transitions, 4036 flow [2024-06-20 18:03:39,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:39,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:39,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:39,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 18:03:39,441 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:39,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash -945374935, now seen corresponding path program 2 times [2024-06-20 18:03:39,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:39,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008625876] [2024-06-20 18:03:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:39,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:39,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:39,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008625876] [2024-06-20 18:03:39,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008625876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:39,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:39,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:39,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124109336] [2024-06-20 18:03:39,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:39,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:39,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:39,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:39,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 327 transitions, 4036 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:39,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:39,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:39,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:40,454 INFO L124 PetriNetUnfolderBase]: 2631/4604 cut-off events. [2024-06-20 18:03:40,454 INFO L125 PetriNetUnfolderBase]: For 342885/342885 co-relation queries the response was YES. [2024-06-20 18:03:40,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31999 conditions, 4604 events. 2631/4604 cut-off events. For 342885/342885 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31052 event pairs, 541 based on Foata normal form. 2/4599 useless extension candidates. Maximal degree in co-relation 31878. Up to 3812 conditions per place. [2024-06-20 18:03:40,506 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 237 selfloop transitions, 118 changer transitions 0/364 dead transitions. [2024-06-20 18:03:40,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 364 transitions, 5504 flow [2024-06-20 18:03:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:03:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:03:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-20 18:03:40,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58656330749354 [2024-06-20 18:03:40,508 INFO L175 Difference]: Start difference. First operand has 256 places, 327 transitions, 4036 flow. Second operand 9 states and 227 transitions. [2024-06-20 18:03:40,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 364 transitions, 5504 flow [2024-06-20 18:03:41,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 364 transitions, 5274 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 18:03:41,334 INFO L231 Difference]: Finished difference. Result has 259 places, 341 transitions, 4287 flow [2024-06-20 18:03:41,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4287, PETRI_PLACES=259, PETRI_TRANSITIONS=341} [2024-06-20 18:03:41,335 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-20 18:03:41,335 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 341 transitions, 4287 flow [2024-06-20 18:03:41,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:41,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:41,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:41,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 18:03:41,335 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:41,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -938708695, now seen corresponding path program 3 times [2024-06-20 18:03:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:41,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599596010] [2024-06-20 18:03:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:41,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:41,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599596010] [2024-06-20 18:03:41,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599596010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:41,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:41,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:41,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996979768] [2024-06-20 18:03:41,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:41,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:41,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:41,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:41,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 341 transitions, 4287 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:41,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:41,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:41,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:42,396 INFO L124 PetriNetUnfolderBase]: 2625/4596 cut-off events. [2024-06-20 18:03:42,396 INFO L125 PetriNetUnfolderBase]: For 344510/344510 co-relation queries the response was YES. [2024-06-20 18:03:42,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32156 conditions, 4596 events. 2625/4596 cut-off events. For 344510/344510 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31024 event pairs, 541 based on Foata normal form. 2/4591 useless extension candidates. Maximal degree in co-relation 32033. Up to 3807 conditions per place. [2024-06-20 18:03:42,447 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 232 selfloop transitions, 123 changer transitions 0/364 dead transitions. [2024-06-20 18:03:42,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 364 transitions, 5393 flow [2024-06-20 18:03:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:03:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:03:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-20 18:03:42,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674418604651162 [2024-06-20 18:03:42,449 INFO L175 Difference]: Start difference. First operand has 259 places, 341 transitions, 4287 flow. Second operand 10 states and 244 transitions. [2024-06-20 18:03:42,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 364 transitions, 5393 flow [2024-06-20 18:03:43,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 364 transitions, 5167 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-20 18:03:43,178 INFO L231 Difference]: Finished difference. Result has 266 places, 341 transitions, 4315 flow [2024-06-20 18:03:43,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4315, PETRI_PLACES=266, PETRI_TRANSITIONS=341} [2024-06-20 18:03:43,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-20 18:03:43,179 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 341 transitions, 4315 flow [2024-06-20 18:03:43,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:43,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:43,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:43,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 18:03:43,179 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:43,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash -938699767, now seen corresponding path program 1 times [2024-06-20 18:03:43,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:43,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127901919] [2024-06-20 18:03:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:43,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127901919] [2024-06-20 18:03:43,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127901919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:43,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:43,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:43,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188966854] [2024-06-20 18:03:43,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:43,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:43,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:43,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 341 transitions, 4315 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:43,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:43,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:43,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:44,282 INFO L124 PetriNetUnfolderBase]: 2641/4620 cut-off events. [2024-06-20 18:03:44,282 INFO L125 PetriNetUnfolderBase]: For 357961/357961 co-relation queries the response was YES. [2024-06-20 18:03:44,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32319 conditions, 4620 events. 2641/4620 cut-off events. For 357961/357961 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31206 event pairs, 542 based on Foata normal form. 4/4617 useless extension candidates. Maximal degree in co-relation 32195. Up to 3975 conditions per place. [2024-06-20 18:03:44,342 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 275 selfloop transitions, 74 changer transitions 0/359 dead transitions. [2024-06-20 18:03:44,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 359 transitions, 5119 flow [2024-06-20 18:03:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 18:03:44,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-20 18:03:44,343 INFO L175 Difference]: Start difference. First operand has 266 places, 341 transitions, 4315 flow. Second operand 7 states and 180 transitions. [2024-06-20 18:03:44,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 359 transitions, 5119 flow [2024-06-20 18:03:45,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 359 transitions, 4866 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 18:03:45,206 INFO L231 Difference]: Finished difference. Result has 265 places, 344 transitions, 4293 flow [2024-06-20 18:03:45,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4293, PETRI_PLACES=265, PETRI_TRANSITIONS=344} [2024-06-20 18:03:45,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-20 18:03:45,207 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 344 transitions, 4293 flow [2024-06-20 18:03:45,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:45,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:45,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:45,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 18:03:45,207 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:45,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1653961109, now seen corresponding path program 4 times [2024-06-20 18:03:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:45,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038976407] [2024-06-20 18:03:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:45,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:45,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038976407] [2024-06-20 18:03:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038976407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:45,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885391484] [2024-06-20 18:03:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:45,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:45,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:45,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:45,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 344 transitions, 4293 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:45,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:45,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:45,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:46,270 INFO L124 PetriNetUnfolderBase]: 2644/4618 cut-off events. [2024-06-20 18:03:46,270 INFO L125 PetriNetUnfolderBase]: For 362132/362132 co-relation queries the response was YES. [2024-06-20 18:03:46,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32303 conditions, 4618 events. 2644/4618 cut-off events. For 362132/362132 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31177 event pairs, 550 based on Foata normal form. 4/4617 useless extension candidates. Maximal degree in co-relation 32177. Up to 3960 conditions per place. [2024-06-20 18:03:46,326 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 281 selfloop transitions, 74 changer transitions 0/364 dead transitions. [2024-06-20 18:03:46,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 364 transitions, 5155 flow [2024-06-20 18:03:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:03:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:03:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 18:03:46,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-20 18:03:46,327 INFO L175 Difference]: Start difference. First operand has 265 places, 344 transitions, 4293 flow. Second operand 9 states and 216 transitions. [2024-06-20 18:03:46,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 364 transitions, 5155 flow [2024-06-20 18:03:47,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 364 transitions, 4948 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 18:03:47,178 INFO L231 Difference]: Finished difference. Result has 269 places, 347 transitions, 4358 flow [2024-06-20 18:03:47,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4358, PETRI_PLACES=269, PETRI_TRANSITIONS=347} [2024-06-20 18:03:47,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-20 18:03:47,179 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 347 transitions, 4358 flow [2024-06-20 18:03:47,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:47,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:47,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:47,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 18:03:47,180 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:47,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash 785787177, now seen corresponding path program 4 times [2024-06-20 18:03:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:47,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521035469] [2024-06-20 18:03:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:47,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:47,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521035469] [2024-06-20 18:03:47,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521035469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:47,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:47,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:47,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904012796] [2024-06-20 18:03:47,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:47,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:47,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:47,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:47,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:47,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:47,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 347 transitions, 4358 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:47,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:47,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:47,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:48,256 INFO L124 PetriNetUnfolderBase]: 2678/4671 cut-off events. [2024-06-20 18:03:48,256 INFO L125 PetriNetUnfolderBase]: For 374347/374347 co-relation queries the response was YES. [2024-06-20 18:03:48,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33007 conditions, 4671 events. 2678/4671 cut-off events. For 374347/374347 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31543 event pairs, 559 based on Foata normal form. 2/4668 useless extension candidates. Maximal degree in co-relation 32880. Up to 3870 conditions per place. [2024-06-20 18:03:48,314 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 237 selfloop transitions, 135 changer transitions 0/381 dead transitions. [2024-06-20 18:03:48,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 381 transitions, 6022 flow [2024-06-20 18:03:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:03:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:03:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2024-06-20 18:03:48,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665961945031712 [2024-06-20 18:03:48,316 INFO L175 Difference]: Start difference. First operand has 269 places, 347 transitions, 4358 flow. Second operand 11 states and 268 transitions. [2024-06-20 18:03:48,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 381 transitions, 6022 flow [2024-06-20 18:03:49,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 381 transitions, 5772 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-20 18:03:49,241 INFO L231 Difference]: Finished difference. Result has 273 places, 359 transitions, 4609 flow [2024-06-20 18:03:49,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4609, PETRI_PLACES=273, PETRI_TRANSITIONS=359} [2024-06-20 18:03:49,241 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-20 18:03:49,241 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 359 transitions, 4609 flow [2024-06-20 18:03:49,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:49,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:49,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:49,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 18:03:49,242 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:49,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:49,242 INFO L85 PathProgramCache]: Analyzing trace with hash 779120937, now seen corresponding path program 5 times [2024-06-20 18:03:49,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:49,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56039933] [2024-06-20 18:03:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:49,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:49,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:49,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56039933] [2024-06-20 18:03:49,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56039933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:49,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:49,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:49,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117450145] [2024-06-20 18:03:49,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:49,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:49,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:49,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:49,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:49,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:49,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 359 transitions, 4609 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:49,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:49,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:49,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:50,285 INFO L124 PetriNetUnfolderBase]: 2672/4663 cut-off events. [2024-06-20 18:03:50,286 INFO L125 PetriNetUnfolderBase]: For 373250/373250 co-relation queries the response was YES. [2024-06-20 18:03:50,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32774 conditions, 4663 events. 2672/4663 cut-off events. For 373250/373250 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31531 event pairs, 559 based on Foata normal form. 2/4660 useless extension candidates. Maximal degree in co-relation 32646. Up to 3865 conditions per place. [2024-06-20 18:03:50,340 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 235 selfloop transitions, 134 changer transitions 0/378 dead transitions. [2024-06-20 18:03:50,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 378 transitions, 5883 flow [2024-06-20 18:03:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:03:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:03:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-20 18:03:50,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-20 18:03:50,341 INFO L175 Difference]: Start difference. First operand has 273 places, 359 transitions, 4609 flow. Second operand 9 states and 225 transitions. [2024-06-20 18:03:50,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 378 transitions, 5883 flow [2024-06-20 18:03:51,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 378 transitions, 5496 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-20 18:03:51,162 INFO L231 Difference]: Finished difference. Result has 274 places, 359 transitions, 4497 flow [2024-06-20 18:03:51,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4222, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4497, PETRI_PLACES=274, PETRI_TRANSITIONS=359} [2024-06-20 18:03:51,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-20 18:03:51,163 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 359 transitions, 4497 flow [2024-06-20 18:03:51,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:51,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:51,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:51,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 18:03:51,163 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:51,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash -632739787, now seen corresponding path program 6 times [2024-06-20 18:03:51,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:51,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435031710] [2024-06-20 18:03:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:51,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:51,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435031710] [2024-06-20 18:03:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435031710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:51,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:51,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:03:51,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978868549] [2024-06-20 18:03:51,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:51,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:03:51,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:03:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:03:51,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:03:51,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 359 transitions, 4497 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:51,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:51,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:03:51,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:52,221 INFO L124 PetriNetUnfolderBase]: 2666/4655 cut-off events. [2024-06-20 18:03:52,221 INFO L125 PetriNetUnfolderBase]: For 372379/372379 co-relation queries the response was YES. [2024-06-20 18:03:52,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32492 conditions, 4655 events. 2666/4655 cut-off events. For 372379/372379 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31445 event pairs, 559 based on Foata normal form. 2/4652 useless extension candidates. Maximal degree in co-relation 32364. Up to 3860 conditions per place. [2024-06-20 18:03:52,282 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 228 selfloop transitions, 141 changer transitions 0/378 dead transitions. [2024-06-20 18:03:52,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 378 transitions, 5611 flow [2024-06-20 18:03:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:03:52,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:03:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-20 18:03:52,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-20 18:03:52,284 INFO L175 Difference]: Start difference. First operand has 274 places, 359 transitions, 4497 flow. Second operand 10 states and 242 transitions. [2024-06-20 18:03:52,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 378 transitions, 5611 flow [2024-06-20 18:03:53,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 378 transitions, 5309 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 18:03:53,201 INFO L231 Difference]: Finished difference. Result has 276 places, 359 transitions, 4484 flow [2024-06-20 18:03:53,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4484, PETRI_PLACES=276, PETRI_TRANSITIONS=359} [2024-06-20 18:03:53,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-20 18:03:53,201 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 359 transitions, 4484 flow [2024-06-20 18:03:53,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:53,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:53,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:53,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 18:03:53,202 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:53,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:53,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1615327275, now seen corresponding path program 2 times [2024-06-20 18:03:53,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:53,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498781309] [2024-06-20 18:03:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:53,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:53,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:53,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498781309] [2024-06-20 18:03:53,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498781309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:53,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:53,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:53,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977971191] [2024-06-20 18:03:53,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:53,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:53,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:53,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:53,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:53,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:53,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 359 transitions, 4484 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:53,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:53,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:53,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:54,209 INFO L124 PetriNetUnfolderBase]: 2682/4679 cut-off events. [2024-06-20 18:03:54,209 INFO L125 PetriNetUnfolderBase]: For 388443/388443 co-relation queries the response was YES. [2024-06-20 18:03:54,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32810 conditions, 4679 events. 2682/4679 cut-off events. For 388443/388443 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 31659 event pairs, 560 based on Foata normal form. 4/4678 useless extension candidates. Maximal degree in co-relation 32682. Up to 4037 conditions per place. [2024-06-20 18:03:54,266 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 288 selfloop transitions, 76 changer transitions 0/374 dead transitions. [2024-06-20 18:03:54,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 374 transitions, 5316 flow [2024-06-20 18:03:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 18:03:54,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-20 18:03:54,267 INFO L175 Difference]: Start difference. First operand has 276 places, 359 transitions, 4484 flow. Second operand 7 states and 179 transitions. [2024-06-20 18:03:54,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 374 transitions, 5316 flow [2024-06-20 18:03:55,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 374 transitions, 4994 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 18:03:55,075 INFO L231 Difference]: Finished difference. Result has 273 places, 362 transitions, 4402 flow [2024-06-20 18:03:55,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4162, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4402, PETRI_PLACES=273, PETRI_TRANSITIONS=362} [2024-06-20 18:03:55,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-20 18:03:55,075 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 362 transitions, 4402 flow [2024-06-20 18:03:55,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:55,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:55,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 18:03:55,076 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:55,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:55,076 INFO L85 PathProgramCache]: Analyzing trace with hash -632730859, now seen corresponding path program 3 times [2024-06-20 18:03:55,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:55,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788004359] [2024-06-20 18:03:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:55,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:55,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788004359] [2024-06-20 18:03:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788004359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:55,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:55,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849684322] [2024-06-20 18:03:55,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:55,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:55,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:55,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:55,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 362 transitions, 4402 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:55,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:55,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:55,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:56,068 INFO L124 PetriNetUnfolderBase]: 2698/4707 cut-off events. [2024-06-20 18:03:56,068 INFO L125 PetriNetUnfolderBase]: For 398446/398446 co-relation queries the response was YES. [2024-06-20 18:03:56,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33021 conditions, 4707 events. 2698/4707 cut-off events. For 398446/398446 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31877 event pairs, 564 based on Foata normal form. 4/4706 useless extension candidates. Maximal degree in co-relation 32893. Up to 4061 conditions per place. [2024-06-20 18:03:56,126 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 289 selfloop transitions, 78 changer transitions 0/377 dead transitions. [2024-06-20 18:03:56,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 377 transitions, 5246 flow [2024-06-20 18:03:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 18:03:56,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-20 18:03:56,127 INFO L175 Difference]: Start difference. First operand has 273 places, 362 transitions, 4402 flow. Second operand 7 states and 178 transitions. [2024-06-20 18:03:56,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 377 transitions, 5246 flow [2024-06-20 18:03:57,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 377 transitions, 5028 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 18:03:57,140 INFO L231 Difference]: Finished difference. Result has 275 places, 365 transitions, 4434 flow [2024-06-20 18:03:57,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4434, PETRI_PLACES=275, PETRI_TRANSITIONS=365} [2024-06-20 18:03:57,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-20 18:03:57,141 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 365 transitions, 4434 flow [2024-06-20 18:03:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:57,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:57,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:57,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 18:03:57,142 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:57,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -632432329, now seen corresponding path program 4 times [2024-06-20 18:03:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:57,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457495094] [2024-06-20 18:03:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:57,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:57,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:57,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457495094] [2024-06-20 18:03:57,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457495094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:57,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:57,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278906221] [2024-06-20 18:03:57,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:57,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:57,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:57,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:57,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 365 transitions, 4434 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:57,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:57,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:57,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:03:58,147 INFO L124 PetriNetUnfolderBase]: 2701/4716 cut-off events. [2024-06-20 18:03:58,148 INFO L125 PetriNetUnfolderBase]: For 399732/399732 co-relation queries the response was YES. [2024-06-20 18:03:58,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32979 conditions, 4716 events. 2701/4716 cut-off events. For 399732/399732 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31949 event pairs, 551 based on Foata normal form. 4/4715 useless extension candidates. Maximal degree in co-relation 32850. Up to 4012 conditions per place. [2024-06-20 18:03:58,209 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 284 selfloop transitions, 89 changer transitions 0/383 dead transitions. [2024-06-20 18:03:58,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 383 transitions, 5334 flow [2024-06-20 18:03:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:03:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:03:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 18:03:58,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-20 18:03:58,210 INFO L175 Difference]: Start difference. First operand has 275 places, 365 transitions, 4434 flow. Second operand 7 states and 179 transitions. [2024-06-20 18:03:58,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 383 transitions, 5334 flow [2024-06-20 18:03:59,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 383 transitions, 5106 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 18:03:59,411 INFO L231 Difference]: Finished difference. Result has 278 places, 370 transitions, 4539 flow [2024-06-20 18:03:59,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4539, PETRI_PLACES=278, PETRI_TRANSITIONS=370} [2024-06-20 18:03:59,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-20 18:03:59,412 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 370 transitions, 4539 flow [2024-06-20 18:03:59,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:59,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:03:59,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:03:59,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 18:03:59,413 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:03:59,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:03:59,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1423725066, now seen corresponding path program 1 times [2024-06-20 18:03:59,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:03:59,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783051616] [2024-06-20 18:03:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:03:59,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:03:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:03:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:03:59,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:03:59,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783051616] [2024-06-20 18:03:59,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783051616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:03:59,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:03:59,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:03:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486556791] [2024-06-20 18:03:59,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:03:59,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:03:59,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:03:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:03:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:03:59,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:03:59,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 370 transitions, 4539 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:03:59,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:03:59,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:03:59,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:00,470 INFO L124 PetriNetUnfolderBase]: 2735/4774 cut-off events. [2024-06-20 18:04:00,470 INFO L125 PetriNetUnfolderBase]: For 421213/421213 co-relation queries the response was YES. [2024-06-20 18:04:00,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34252 conditions, 4774 events. 2735/4774 cut-off events. For 421213/421213 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32374 event pairs, 447 based on Foata normal form. 2/4768 useless extension candidates. Maximal degree in co-relation 34121. Up to 4001 conditions per place. [2024-06-20 18:04:00,530 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 334 selfloop transitions, 57 changer transitions 0/401 dead transitions. [2024-06-20 18:04:00,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 401 transitions, 5981 flow [2024-06-20 18:04:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:04:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:04:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 18:04:00,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245847176079734 [2024-06-20 18:04:00,531 INFO L175 Difference]: Start difference. First operand has 278 places, 370 transitions, 4539 flow. Second operand 7 states and 188 transitions. [2024-06-20 18:04:00,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 401 transitions, 5981 flow [2024-06-20 18:04:01,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 401 transitions, 5785 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-20 18:04:01,670 INFO L231 Difference]: Finished difference. Result has 282 places, 376 transitions, 4718 flow [2024-06-20 18:04:01,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4718, PETRI_PLACES=282, PETRI_TRANSITIONS=376} [2024-06-20 18:04:01,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-20 18:04:01,670 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 376 transitions, 4718 flow [2024-06-20 18:04:01,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:01,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:01,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:01,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 18:04:01,671 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:01,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash -634460306, now seen corresponding path program 2 times [2024-06-20 18:04:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:01,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600815845] [2024-06-20 18:04:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:01,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:01,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600815845] [2024-06-20 18:04:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600815845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:01,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:01,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76635201] [2024-06-20 18:04:01,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:01,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:01,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:01,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:01,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:01,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:01,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 376 transitions, 4718 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:01,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:01,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:01,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:02,795 INFO L124 PetriNetUnfolderBase]: 2756/4805 cut-off events. [2024-06-20 18:04:02,796 INFO L125 PetriNetUnfolderBase]: For 441004/441004 co-relation queries the response was YES. [2024-06-20 18:04:02,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35043 conditions, 4805 events. 2756/4805 cut-off events. For 441004/441004 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32603 event pairs, 453 based on Foata normal form. 2/4799 useless extension candidates. Maximal degree in co-relation 34910. Up to 4021 conditions per place. [2024-06-20 18:04:02,852 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 331 selfloop transitions, 61 changer transitions 0/402 dead transitions. [2024-06-20 18:04:02,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 402 transitions, 6082 flow [2024-06-20 18:04:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:04:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:04:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 18:04:02,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-06-20 18:04:02,854 INFO L175 Difference]: Start difference. First operand has 282 places, 376 transitions, 4718 flow. Second operand 7 states and 185 transitions. [2024-06-20 18:04:02,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 402 transitions, 6082 flow [2024-06-20 18:04:04,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 402 transitions, 5845 flow, removed 96 selfloop flow, removed 2 redundant places. [2024-06-20 18:04:04,020 INFO L231 Difference]: Finished difference. Result has 287 places, 380 transitions, 4784 flow [2024-06-20 18:04:04,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4784, PETRI_PLACES=287, PETRI_TRANSITIONS=380} [2024-06-20 18:04:04,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-20 18:04:04,020 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 380 transitions, 4784 flow [2024-06-20 18:04:04,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:04,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:04,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:04,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 18:04:04,021 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:04,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:04,021 INFO L85 PathProgramCache]: Analyzing trace with hash 569433514, now seen corresponding path program 3 times [2024-06-20 18:04:04,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:04,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225286024] [2024-06-20 18:04:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:04,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:04,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:04,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225286024] [2024-06-20 18:04:04,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225286024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:04,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:04,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:04,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826227855] [2024-06-20 18:04:04,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:04,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:04,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:04,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:04,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 380 transitions, 4784 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:04,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:04,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:04,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:05,128 INFO L124 PetriNetUnfolderBase]: 2751/4798 cut-off events. [2024-06-20 18:04:05,128 INFO L125 PetriNetUnfolderBase]: For 437638/437638 co-relation queries the response was YES. [2024-06-20 18:04:05,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34605 conditions, 4798 events. 2751/4798 cut-off events. For 437638/437638 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32712 event pairs, 548 based on Foata normal form. 2/4785 useless extension candidates. Maximal degree in co-relation 34470. Up to 4125 conditions per place. [2024-06-20 18:04:05,189 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 342 selfloop transitions, 47 changer transitions 0/399 dead transitions. [2024-06-20 18:04:05,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 399 transitions, 5786 flow [2024-06-20 18:04:05,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:04:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:04:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 18:04:05,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-20 18:04:05,190 INFO L175 Difference]: Start difference. First operand has 287 places, 380 transitions, 4784 flow. Second operand 6 states and 161 transitions. [2024-06-20 18:04:05,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 399 transitions, 5786 flow [2024-06-20 18:04:06,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 399 transitions, 5590 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-20 18:04:06,545 INFO L231 Difference]: Finished difference. Result has 290 places, 380 transitions, 4687 flow [2024-06-20 18:04:06,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4588, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4687, PETRI_PLACES=290, PETRI_TRANSITIONS=380} [2024-06-20 18:04:06,546 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-20 18:04:06,546 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 380 transitions, 4687 flow [2024-06-20 18:04:06,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:06,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:06,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:06,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 18:04:06,546 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:06,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:06,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1084231340, now seen corresponding path program 4 times [2024-06-20 18:04:06,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:06,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143212204] [2024-06-20 18:04:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:06,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:06,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:06,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143212204] [2024-06-20 18:04:06,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143212204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:06,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:06,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:06,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205349227] [2024-06-20 18:04:06,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:06,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:06,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:06,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 380 transitions, 4687 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:06,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:06,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:06,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:07,619 INFO L124 PetriNetUnfolderBase]: 2759/4817 cut-off events. [2024-06-20 18:04:07,619 INFO L125 PetriNetUnfolderBase]: For 445907/445907 co-relation queries the response was YES. [2024-06-20 18:04:07,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34630 conditions, 4817 events. 2759/4817 cut-off events. For 445907/445907 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32848 event pairs, 557 based on Foata normal form. 2/4811 useless extension candidates. Maximal degree in co-relation 34494. Up to 4174 conditions per place. [2024-06-20 18:04:07,682 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 339 selfloop transitions, 47 changer transitions 0/396 dead transitions. [2024-06-20 18:04:07,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 396 transitions, 5561 flow [2024-06-20 18:04:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:04:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:04:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 18:04:07,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-20 18:04:07,684 INFO L175 Difference]: Start difference. First operand has 290 places, 380 transitions, 4687 flow. Second operand 6 states and 158 transitions. [2024-06-20 18:04:07,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 396 transitions, 5561 flow [2024-06-20 18:04:09,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 396 transitions, 5442 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 18:04:09,258 INFO L231 Difference]: Finished difference. Result has 291 places, 382 transitions, 4739 flow [2024-06-20 18:04:09,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4739, PETRI_PLACES=291, PETRI_TRANSITIONS=382} [2024-06-20 18:04:09,258 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-20 18:04:09,258 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 382 transitions, 4739 flow [2024-06-20 18:04:09,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:09,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:09,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:09,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 18:04:09,259 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:09,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1378465742, now seen corresponding path program 5 times [2024-06-20 18:04:09,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:09,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640653350] [2024-06-20 18:04:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:09,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:09,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:09,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640653350] [2024-06-20 18:04:09,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640653350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:09,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:09,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:09,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616597339] [2024-06-20 18:04:09,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:09,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:09,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:09,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:09,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:09,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:09,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 382 transitions, 4739 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:09,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:09,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:09,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:10,335 INFO L124 PetriNetUnfolderBase]: 2754/4811 cut-off events. [2024-06-20 18:04:10,335 INFO L125 PetriNetUnfolderBase]: For 446258/446258 co-relation queries the response was YES. [2024-06-20 18:04:10,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34430 conditions, 4811 events. 2754/4811 cut-off events. For 446258/446258 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32790 event pairs, 553 based on Foata normal form. 2/4808 useless extension candidates. Maximal degree in co-relation 34293. Up to 4167 conditions per place. [2024-06-20 18:04:10,395 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 336 selfloop transitions, 52 changer transitions 0/398 dead transitions. [2024-06-20 18:04:10,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 398 transitions, 5553 flow [2024-06-20 18:04:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:04:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:04:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 18:04:10,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-20 18:04:10,396 INFO L175 Difference]: Start difference. First operand has 291 places, 382 transitions, 4739 flow. Second operand 8 states and 204 transitions. [2024-06-20 18:04:10,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 398 transitions, 5553 flow [2024-06-20 18:04:11,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 398 transitions, 5364 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 18:04:12,004 INFO L231 Difference]: Finished difference. Result has 295 places, 382 transitions, 4659 flow [2024-06-20 18:04:12,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4550, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4659, PETRI_PLACES=295, PETRI_TRANSITIONS=382} [2024-06-20 18:04:12,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-20 18:04:12,005 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 382 transitions, 4659 flow [2024-06-20 18:04:12,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:12,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:12,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:12,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 18:04:12,005 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:12,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash -339167048, now seen corresponding path program 6 times [2024-06-20 18:04:12,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:12,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077475097] [2024-06-20 18:04:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:12,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:12,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:12,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077475097] [2024-06-20 18:04:12,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077475097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:12,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:12,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:12,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664809476] [2024-06-20 18:04:12,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:12,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:12,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:12,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:12,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:12,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:12,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 382 transitions, 4659 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:12,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:12,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:12,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:13,106 INFO L124 PetriNetUnfolderBase]: 2749/4804 cut-off events. [2024-06-20 18:04:13,106 INFO L125 PetriNetUnfolderBase]: For 444737/444737 co-relation queries the response was YES. [2024-06-20 18:04:13,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34099 conditions, 4804 events. 2749/4804 cut-off events. For 444737/444737 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32696 event pairs, 550 based on Foata normal form. 2/4801 useless extension candidates. Maximal degree in co-relation 33961. Up to 4140 conditions per place. [2024-06-20 18:04:13,165 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 331 selfloop transitions, 58 changer transitions 0/399 dead transitions. [2024-06-20 18:04:13,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 399 transitions, 5477 flow [2024-06-20 18:04:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:04:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:04:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 18:04:13,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-06-20 18:04:13,166 INFO L175 Difference]: Start difference. First operand has 295 places, 382 transitions, 4659 flow. Second operand 8 states and 203 transitions. [2024-06-20 18:04:13,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 399 transitions, 5477 flow [2024-06-20 18:04:14,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 399 transitions, 5310 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 18:04:14,512 INFO L231 Difference]: Finished difference. Result has 296 places, 382 transitions, 4613 flow [2024-06-20 18:04:14,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4492, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4613, PETRI_PLACES=296, PETRI_TRANSITIONS=382} [2024-06-20 18:04:14,512 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-20 18:04:14,512 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 382 transitions, 4613 flow [2024-06-20 18:04:14,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:14,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:14,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:14,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 18:04:14,513 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:14,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1425637022, now seen corresponding path program 1 times [2024-06-20 18:04:14,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:14,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773973224] [2024-06-20 18:04:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:14,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:14,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:14,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773973224] [2024-06-20 18:04:14,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773973224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:14,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:14,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:04:14,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037325574] [2024-06-20 18:04:14,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:14,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:04:14,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:14,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:04:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:04:14,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:04:14,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 382 transitions, 4613 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:14,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:14,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:04:14,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:15,758 INFO L124 PetriNetUnfolderBase]: 2754/4822 cut-off events. [2024-06-20 18:04:15,759 INFO L125 PetriNetUnfolderBase]: For 448303/448303 co-relation queries the response was YES. [2024-06-20 18:04:15,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34177 conditions, 4822 events. 2754/4822 cut-off events. For 448303/448303 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32897 event pairs, 538 based on Foata normal form. 1/4819 useless extension candidates. Maximal degree in co-relation 34037. Up to 4215 conditions per place. [2024-06-20 18:04:15,814 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 378 selfloop transitions, 28 changer transitions 0/415 dead transitions. [2024-06-20 18:04:15,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 415 transitions, 5545 flow [2024-06-20 18:04:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:04:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:04:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 18:04:15,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017441860465116 [2024-06-20 18:04:15,815 INFO L175 Difference]: Start difference. First operand has 296 places, 382 transitions, 4613 flow. Second operand 8 states and 207 transitions. [2024-06-20 18:04:15,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 415 transitions, 5545 flow [2024-06-20 18:04:17,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 415 transitions, 5375 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 18:04:17,302 INFO L231 Difference]: Finished difference. Result has 295 places, 385 transitions, 4555 flow [2024-06-20 18:04:17,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4555, PETRI_PLACES=295, PETRI_TRANSITIONS=385} [2024-06-20 18:04:17,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-20 18:04:17,303 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 385 transitions, 4555 flow [2024-06-20 18:04:17,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:17,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:17,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:17,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 18:04:17,303 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:17,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:17,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2038714824, now seen corresponding path program 2 times [2024-06-20 18:04:17,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:17,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640088437] [2024-06-20 18:04:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:17,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:17,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:17,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640088437] [2024-06-20 18:04:17,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640088437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:17,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:17,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:04:17,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790263735] [2024-06-20 18:04:17,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:17,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:04:17,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:04:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:04:17,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:04:17,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 385 transitions, 4555 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:17,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:17,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:04:17,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:18,448 INFO L124 PetriNetUnfolderBase]: 2767/4834 cut-off events. [2024-06-20 18:04:18,448 INFO L125 PetriNetUnfolderBase]: For 461388/461388 co-relation queries the response was YES. [2024-06-20 18:04:18,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34308 conditions, 4834 events. 2767/4834 cut-off events. For 461388/461388 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33015 event pairs, 554 based on Foata normal form. 1/4827 useless extension candidates. Maximal degree in co-relation 34168. Up to 4090 conditions per place. [2024-06-20 18:04:18,511 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 308 selfloop transitions, 88 changer transitions 0/405 dead transitions. [2024-06-20 18:04:18,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 405 transitions, 5669 flow [2024-06-20 18:04:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:04:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:04:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 18:04:18,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-20 18:04:18,512 INFO L175 Difference]: Start difference. First operand has 295 places, 385 transitions, 4555 flow. Second operand 6 states and 158 transitions. [2024-06-20 18:04:18,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 405 transitions, 5669 flow [2024-06-20 18:04:20,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 405 transitions, 5591 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 18:04:20,399 INFO L231 Difference]: Finished difference. Result has 295 places, 391 transitions, 4771 flow [2024-06-20 18:04:20,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4771, PETRI_PLACES=295, PETRI_TRANSITIONS=391} [2024-06-20 18:04:20,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-20 18:04:20,400 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 391 transitions, 4771 flow [2024-06-20 18:04:20,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:20,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:20,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:20,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 18:04:20,401 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:20,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1378470702, now seen corresponding path program 3 times [2024-06-20 18:04:20,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:20,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853528120] [2024-06-20 18:04:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:20,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:20,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853528120] [2024-06-20 18:04:20,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853528120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:20,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:20,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:04:20,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894808058] [2024-06-20 18:04:20,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:20,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:04:20,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:04:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:04:20,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:04:20,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 391 transitions, 4771 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:20,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:20,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:04:20,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:21,525 INFO L124 PetriNetUnfolderBase]: 2764/4831 cut-off events. [2024-06-20 18:04:21,525 INFO L125 PetriNetUnfolderBase]: For 466896/466896 co-relation queries the response was YES. [2024-06-20 18:04:21,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34444 conditions, 4831 events. 2764/4831 cut-off events. For 466896/466896 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33028 event pairs, 551 based on Foata normal form. 1/4827 useless extension candidates. Maximal degree in co-relation 34303. Up to 4087 conditions per place. [2024-06-20 18:04:21,588 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 301 selfloop transitions, 101 changer transitions 0/411 dead transitions. [2024-06-20 18:04:21,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 411 transitions, 5623 flow [2024-06-20 18:04:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:04:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:04:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-20 18:04:21,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744186046511628 [2024-06-20 18:04:21,589 INFO L175 Difference]: Start difference. First operand has 295 places, 391 transitions, 4771 flow. Second operand 10 states and 247 transitions. [2024-06-20 18:04:21,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 411 transitions, 5623 flow [2024-06-20 18:04:23,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 411 transitions, 5527 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 18:04:23,553 INFO L231 Difference]: Finished difference. Result has 302 places, 391 transitions, 4888 flow [2024-06-20 18:04:23,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4675, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4888, PETRI_PLACES=302, PETRI_TRANSITIONS=391} [2024-06-20 18:04:23,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-20 18:04:23,554 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 391 transitions, 4888 flow [2024-06-20 18:04:23,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:23,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:23,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:23,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 18:04:23,555 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:23,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:23,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1425452448, now seen corresponding path program 1 times [2024-06-20 18:04:23,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:23,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208125151] [2024-06-20 18:04:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:23,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:23,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208125151] [2024-06-20 18:04:23,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208125151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:23,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:23,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756931909] [2024-06-20 18:04:23,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:23,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:23,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:23,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:23,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:23,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 391 transitions, 4888 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:23,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:23,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:23,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:24,604 INFO L124 PetriNetUnfolderBase]: 2777/4849 cut-off events. [2024-06-20 18:04:24,604 INFO L125 PetriNetUnfolderBase]: For 472315/472315 co-relation queries the response was YES. [2024-06-20 18:04:24,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34945 conditions, 4849 events. 2777/4849 cut-off events. For 472315/472315 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33142 event pairs, 560 based on Foata normal form. 1/4839 useless extension candidates. Maximal degree in co-relation 34804. Up to 4120 conditions per place. [2024-06-20 18:04:24,670 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 308 selfloop transitions, 93 changer transitions 0/411 dead transitions. [2024-06-20 18:04:24,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 411 transitions, 6010 flow [2024-06-20 18:04:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:04:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:04:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-20 18:04:24,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317829457364341 [2024-06-20 18:04:24,671 INFO L175 Difference]: Start difference. First operand has 302 places, 391 transitions, 4888 flow. Second operand 6 states and 163 transitions. [2024-06-20 18:04:24,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 411 transitions, 6010 flow [2024-06-20 18:04:27,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 411 transitions, 5742 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 18:04:27,112 INFO L231 Difference]: Finished difference. Result has 298 places, 397 transitions, 4925 flow [2024-06-20 18:04:27,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4622, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4925, PETRI_PLACES=298, PETRI_TRANSITIONS=397} [2024-06-20 18:04:27,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-20 18:04:27,129 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 397 transitions, 4925 flow [2024-06-20 18:04:27,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:27,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:27,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:27,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 18:04:27,129 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:27,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:27,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1378477646, now seen corresponding path program 2 times [2024-06-20 18:04:27,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:27,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475501379] [2024-06-20 18:04:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:27,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:27,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475501379] [2024-06-20 18:04:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475501379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:27,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:27,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588015011] [2024-06-20 18:04:27,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:27,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:27,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:27,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:27,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:27,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:27,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 397 transitions, 4925 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:27,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:27,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:27,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:28,229 INFO L124 PetriNetUnfolderBase]: 2790/4873 cut-off events. [2024-06-20 18:04:28,230 INFO L125 PetriNetUnfolderBase]: For 478196/478196 co-relation queries the response was YES. [2024-06-20 18:04:28,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35436 conditions, 4873 events. 2790/4873 cut-off events. For 478196/478196 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33275 event pairs, 554 based on Foata normal form. 1/4869 useless extension candidates. Maximal degree in co-relation 35295. Up to 4135 conditions per place. [2024-06-20 18:04:28,292 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 304 selfloop transitions, 106 changer transitions 0/420 dead transitions. [2024-06-20 18:04:28,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 420 transitions, 6273 flow [2024-06-20 18:04:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:04:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:04:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 18:04:28,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6191860465116279 [2024-06-20 18:04:28,294 INFO L175 Difference]: Start difference. First operand has 298 places, 397 transitions, 4925 flow. Second operand 8 states and 213 transitions. [2024-06-20 18:04:28,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 420 transitions, 6273 flow [2024-06-20 18:04:30,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 420 transitions, 6176 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-20 18:04:30,469 INFO L231 Difference]: Finished difference. Result has 304 places, 403 transitions, 5159 flow [2024-06-20 18:04:30,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4844, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5159, PETRI_PLACES=304, PETRI_TRANSITIONS=403} [2024-06-20 18:04:30,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-20 18:04:30,472 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 403 transitions, 5159 flow [2024-06-20 18:04:30,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:30,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:30,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:30,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 18:04:30,473 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:30,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:30,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1090863828, now seen corresponding path program 3 times [2024-06-20 18:04:30,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:30,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805532106] [2024-06-20 18:04:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:30,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:30,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:30,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805532106] [2024-06-20 18:04:30,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805532106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:30,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:30,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260618443] [2024-06-20 18:04:30,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:30,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:30,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:30,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:30,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:30,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:30,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 403 transitions, 5159 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:30,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:30,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:30,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:31,571 INFO L124 PetriNetUnfolderBase]: 2787/4869 cut-off events. [2024-06-20 18:04:31,571 INFO L125 PetriNetUnfolderBase]: For 483244/483244 co-relation queries the response was YES. [2024-06-20 18:04:31,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35645 conditions, 4869 events. 2787/4869 cut-off events. For 483244/483244 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33344 event pairs, 554 based on Foata normal form. 1/4865 useless extension candidates. Maximal degree in co-relation 35502. Up to 4132 conditions per place. [2024-06-20 18:04:31,632 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 299 selfloop transitions, 111 changer transitions 0/420 dead transitions. [2024-06-20 18:04:31,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 420 transitions, 6211 flow [2024-06-20 18:04:31,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:04:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:04:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-20 18:04:31,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599483204134367 [2024-06-20 18:04:31,634 INFO L175 Difference]: Start difference. First operand has 304 places, 403 transitions, 5159 flow. Second operand 9 states and 232 transitions. [2024-06-20 18:04:31,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 420 transitions, 6211 flow [2024-06-20 18:04:33,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 420 transitions, 5954 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 18:04:33,224 INFO L231 Difference]: Finished difference. Result has 307 places, 403 transitions, 5137 flow [2024-06-20 18:04:33,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4904, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5137, PETRI_PLACES=307, PETRI_TRANSITIONS=403} [2024-06-20 18:04:33,224 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-20 18:04:33,224 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 403 transitions, 5137 flow [2024-06-20 18:04:33,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:33,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:33,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:33,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 18:04:33,225 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:33,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:33,225 INFO L85 PathProgramCache]: Analyzing trace with hash -652857350, now seen corresponding path program 1 times [2024-06-20 18:04:33,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:33,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003904410] [2024-06-20 18:04:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:33,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:33,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:33,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003904410] [2024-06-20 18:04:33,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003904410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:33,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:33,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:33,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633705355] [2024-06-20 18:04:33,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:33,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:33,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:33,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 403 transitions, 5137 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:33,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:33,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:33,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:34,337 INFO L124 PetriNetUnfolderBase]: 2807/4907 cut-off events. [2024-06-20 18:04:34,338 INFO L125 PetriNetUnfolderBase]: For 506782/506782 co-relation queries the response was YES. [2024-06-20 18:04:34,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35825 conditions, 4907 events. 2807/4907 cut-off events. For 506782/506782 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 33518 event pairs, 475 based on Foata normal form. 6/4902 useless extension candidates. Maximal degree in co-relation 35682. Up to 4016 conditions per place. [2024-06-20 18:04:34,404 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 382 selfloop transitions, 35 changer transitions 0/427 dead transitions. [2024-06-20 18:04:34,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 427 transitions, 6293 flow [2024-06-20 18:04:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:04:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:04:34,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 18:04:34,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-20 18:04:34,405 INFO L175 Difference]: Start difference. First operand has 307 places, 403 transitions, 5137 flow. Second operand 6 states and 161 transitions. [2024-06-20 18:04:34,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 427 transitions, 6293 flow [2024-06-20 18:04:36,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 427 transitions, 6043 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 18:04:36,252 INFO L231 Difference]: Finished difference. Result has 304 places, 404 transitions, 4983 flow [2024-06-20 18:04:36,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4889, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4983, PETRI_PLACES=304, PETRI_TRANSITIONS=404} [2024-06-20 18:04:36,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-20 18:04:36,253 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 404 transitions, 4983 flow [2024-06-20 18:04:36,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:36,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:36,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:36,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 18:04:36,253 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:36,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:36,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2132550056, now seen corresponding path program 2 times [2024-06-20 18:04:36,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:36,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896726682] [2024-06-20 18:04:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:36,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:36,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896726682] [2024-06-20 18:04:36,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896726682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:36,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:36,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:36,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909294830] [2024-06-20 18:04:36,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:36,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:36,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:36,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:36,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 404 transitions, 4983 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:36,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:36,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:36,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:37,320 INFO L124 PetriNetUnfolderBase]: 2827/4947 cut-off events. [2024-06-20 18:04:37,321 INFO L125 PetriNetUnfolderBase]: For 506978/506978 co-relation queries the response was YES. [2024-06-20 18:04:37,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35923 conditions, 4947 events. 2827/4947 cut-off events. For 506978/506978 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33983 event pairs, 546 based on Foata normal form. 6/4948 useless extension candidates. Maximal degree in co-relation 35780. Up to 4249 conditions per place. [2024-06-20 18:04:37,387 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 378 selfloop transitions, 34 changer transitions 0/422 dead transitions. [2024-06-20 18:04:37,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 422 transitions, 5897 flow [2024-06-20 18:04:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:04:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:04:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 18:04:37,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-20 18:04:37,388 INFO L175 Difference]: Start difference. First operand has 304 places, 404 transitions, 4983 flow. Second operand 6 states and 160 transitions. [2024-06-20 18:04:37,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 422 transitions, 5897 flow [2024-06-20 18:04:39,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 422 transitions, 5832 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 18:04:39,763 INFO L231 Difference]: Finished difference. Result has 307 places, 405 transitions, 5014 flow [2024-06-20 18:04:39,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4919, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5014, PETRI_PLACES=307, PETRI_TRANSITIONS=405} [2024-06-20 18:04:39,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-20 18:04:39,764 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 405 transitions, 5014 flow [2024-06-20 18:04:39,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:39,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:39,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:39,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 18:04:39,764 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:39,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash -972232312, now seen corresponding path program 7 times [2024-06-20 18:04:39,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614173607] [2024-06-20 18:04:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:39,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:39,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614173607] [2024-06-20 18:04:39,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614173607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:39,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:39,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:39,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779209842] [2024-06-20 18:04:39,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:39,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:39,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:39,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:40,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:40,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 405 transitions, 5014 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:40,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:40,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:40,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:40,965 INFO L124 PetriNetUnfolderBase]: 2843/4952 cut-off events. [2024-06-20 18:04:40,966 INFO L125 PetriNetUnfolderBase]: For 509686/509686 co-relation queries the response was YES. [2024-06-20 18:04:41,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36202 conditions, 4952 events. 2843/4952 cut-off events. For 509686/509686 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 33983 event pairs, 547 based on Foata normal form. 4/4934 useless extension candidates. Maximal degree in co-relation 36058. Up to 4171 conditions per place. [2024-06-20 18:04:41,028 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 345 selfloop transitions, 80 changer transitions 0/435 dead transitions. [2024-06-20 18:04:41,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 435 transitions, 6389 flow [2024-06-20 18:04:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:04:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:04:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 18:04:41,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-20 18:04:41,030 INFO L175 Difference]: Start difference. First operand has 307 places, 405 transitions, 5014 flow. Second operand 7 states and 186 transitions. [2024-06-20 18:04:41,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 435 transitions, 6389 flow [2024-06-20 18:04:43,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 435 transitions, 6307 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 18:04:43,473 INFO L231 Difference]: Finished difference. Result has 310 places, 412 transitions, 5381 flow [2024-06-20 18:04:43,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5381, PETRI_PLACES=310, PETRI_TRANSITIONS=412} [2024-06-20 18:04:43,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-20 18:04:43,474 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 412 transitions, 5381 flow [2024-06-20 18:04:43,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:43,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:43,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:43,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 18:04:43,474 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:43,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:43,475 INFO L85 PathProgramCache]: Analyzing trace with hash -725097974, now seen corresponding path program 8 times [2024-06-20 18:04:43,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:43,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586755222] [2024-06-20 18:04:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:43,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:43,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:43,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586755222] [2024-06-20 18:04:43,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586755222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:43,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:43,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:43,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630438074] [2024-06-20 18:04:43,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:43,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:43,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:43,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:43,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 412 transitions, 5381 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:43,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:43,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:43,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:44,560 INFO L124 PetriNetUnfolderBase]: 2859/4990 cut-off events. [2024-06-20 18:04:44,561 INFO L125 PetriNetUnfolderBase]: For 524043/524043 co-relation queries the response was YES. [2024-06-20 18:04:44,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36840 conditions, 4990 events. 2859/4990 cut-off events. For 524043/524043 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 34225 event pairs, 565 based on Foata normal form. 4/4986 useless extension candidates. Maximal degree in co-relation 36695. Up to 4277 conditions per place. [2024-06-20 18:04:44,630 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 354 selfloop transitions, 70 changer transitions 0/434 dead transitions. [2024-06-20 18:04:44,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 434 transitions, 6425 flow [2024-06-20 18:04:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:04:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:04:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 18:04:44,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-20 18:04:44,631 INFO L175 Difference]: Start difference. First operand has 310 places, 412 transitions, 5381 flow. Second operand 7 states and 181 transitions. [2024-06-20 18:04:44,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 434 transitions, 6425 flow [2024-06-20 18:04:46,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 434 transitions, 6144 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-06-20 18:04:46,607 INFO L231 Difference]: Finished difference. Result has 314 places, 416 transitions, 5408 flow [2024-06-20 18:04:46,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5140, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5408, PETRI_PLACES=314, PETRI_TRANSITIONS=416} [2024-06-20 18:04:46,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-20 18:04:46,608 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 416 transitions, 5408 flow [2024-06-20 18:04:46,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:46,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:46,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:46,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 18:04:46,608 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:46,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:46,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1667121674, now seen corresponding path program 9 times [2024-06-20 18:04:46,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:46,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520456891] [2024-06-20 18:04:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:46,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520456891] [2024-06-20 18:04:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520456891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:46,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:46,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771041215] [2024-06-20 18:04:46,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:46,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:46,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:46,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:46,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 416 transitions, 5408 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:46,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:46,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:46,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:47,708 INFO L124 PetriNetUnfolderBase]: 2862/4995 cut-off events. [2024-06-20 18:04:47,709 INFO L125 PetriNetUnfolderBase]: For 519423/519423 co-relation queries the response was YES. [2024-06-20 18:04:47,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36596 conditions, 4995 events. 2862/4995 cut-off events. For 519423/519423 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34328 event pairs, 564 based on Foata normal form. 4/4991 useless extension candidates. Maximal degree in co-relation 36449. Up to 4282 conditions per place. [2024-06-20 18:04:47,773 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 352 selfloop transitions, 71 changer transitions 0/433 dead transitions. [2024-06-20 18:04:47,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 433 transitions, 6356 flow [2024-06-20 18:04:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:04:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:04:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 18:04:47,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-20 18:04:47,774 INFO L175 Difference]: Start difference. First operand has 314 places, 416 transitions, 5408 flow. Second operand 7 states and 179 transitions. [2024-06-20 18:04:47,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 433 transitions, 6356 flow [2024-06-20 18:04:49,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 433 transitions, 6136 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-20 18:04:49,680 INFO L231 Difference]: Finished difference. Result has 316 places, 418 transitions, 5408 flow [2024-06-20 18:04:49,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5188, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5408, PETRI_PLACES=316, PETRI_TRANSITIONS=418} [2024-06-20 18:04:49,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-20 18:04:49,680 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 418 transitions, 5408 flow [2024-06-20 18:04:49,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:49,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:49,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:49,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 18:04:49,681 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:49,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash 958540460, now seen corresponding path program 10 times [2024-06-20 18:04:49,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:49,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173646847] [2024-06-20 18:04:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:49,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:49,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:49,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173646847] [2024-06-20 18:04:49,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173646847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:49,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:49,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:04:49,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306467184] [2024-06-20 18:04:49,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:49,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:04:49,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:04:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:04:49,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:04:49,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 418 transitions, 5408 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:49,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:49,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:04:49,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:50,818 INFO L124 PetriNetUnfolderBase]: 2857/4973 cut-off events. [2024-06-20 18:04:50,818 INFO L125 PetriNetUnfolderBase]: For 508439/508439 co-relation queries the response was YES. [2024-06-20 18:04:50,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36249 conditions, 4973 events. 2857/4973 cut-off events. For 508439/508439 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34136 event pairs, 591 based on Foata normal form. 2/4967 useless extension candidates. Maximal degree in co-relation 36101. Up to 4281 conditions per place. [2024-06-20 18:04:50,993 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 350 selfloop transitions, 70 changer transitions 0/430 dead transitions. [2024-06-20 18:04:50,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 430 transitions, 6276 flow [2024-06-20 18:04:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:04:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:04:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 18:04:50,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-20 18:04:50,994 INFO L175 Difference]: Start difference. First operand has 316 places, 418 transitions, 5408 flow. Second operand 7 states and 177 transitions. [2024-06-20 18:04:50,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 430 transitions, 6276 flow [2024-06-20 18:04:53,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 430 transitions, 6008 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 18:04:53,012 INFO L231 Difference]: Finished difference. Result has 318 places, 418 transitions, 5285 flow [2024-06-20 18:04:53,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5140, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5285, PETRI_PLACES=318, PETRI_TRANSITIONS=418} [2024-06-20 18:04:53,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-20 18:04:53,012 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 418 transitions, 5285 flow [2024-06-20 18:04:53,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:53,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:53,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:53,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 18:04:53,013 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:53,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:53,013 INFO L85 PathProgramCache]: Analyzing trace with hash -760666806, now seen corresponding path program 4 times [2024-06-20 18:04:53,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:53,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319019348] [2024-06-20 18:04:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:53,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:53,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:53,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319019348] [2024-06-20 18:04:53,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319019348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:53,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:53,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:04:53,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692176404] [2024-06-20 18:04:53,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:53,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:04:53,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:04:53,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:04:53,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:04:53,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 418 transitions, 5285 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:53,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:53,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:04:53,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:54,317 INFO L124 PetriNetUnfolderBase]: 2862/4998 cut-off events. [2024-06-20 18:04:54,317 INFO L125 PetriNetUnfolderBase]: For 509731/509731 co-relation queries the response was YES. [2024-06-20 18:04:54,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36161 conditions, 4998 events. 2862/4998 cut-off events. For 509731/509731 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34323 event pairs, 563 based on Foata normal form. 1/4988 useless extension candidates. Maximal degree in co-relation 36011. Up to 4243 conditions per place. [2024-06-20 18:04:54,384 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 360 selfloop transitions, 87 changer transitions 0/456 dead transitions. [2024-06-20 18:04:54,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 456 transitions, 6323 flow [2024-06-20 18:04:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:04:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:04:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-20 18:04:54,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5976744186046512 [2024-06-20 18:04:54,385 INFO L175 Difference]: Start difference. First operand has 318 places, 418 transitions, 5285 flow. Second operand 10 states and 257 transitions. [2024-06-20 18:04:54,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 456 transitions, 6323 flow [2024-06-20 18:04:56,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 456 transitions, 6136 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 18:04:56,432 INFO L231 Difference]: Finished difference. Result has 322 places, 421 transitions, 5340 flow [2024-06-20 18:04:56,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5098, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5340, PETRI_PLACES=322, PETRI_TRANSITIONS=421} [2024-06-20 18:04:56,433 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-20 18:04:56,433 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 421 transitions, 5340 flow [2024-06-20 18:04:56,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:56,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:04:56,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:04:56,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 18:04:56,433 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:04:56,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:04:56,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1989481550, now seen corresponding path program 5 times [2024-06-20 18:04:56,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:04:56,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840105949] [2024-06-20 18:04:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:04:56,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:04:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:04:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:04:56,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:04:56,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840105949] [2024-06-20 18:04:56,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840105949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:04:56,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:04:56,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:04:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300763074] [2024-06-20 18:04:56,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:04:56,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:04:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:04:56,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:04:56,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:04:56,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:04:56,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 421 transitions, 5340 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:04:56,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:04:56,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:04:56,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:04:57,656 INFO L124 PetriNetUnfolderBase]: 2883/5032 cut-off events. [2024-06-20 18:04:57,656 INFO L125 PetriNetUnfolderBase]: For 530457/530457 co-relation queries the response was YES. [2024-06-20 18:04:57,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36787 conditions, 5032 events. 2883/5032 cut-off events. For 530457/530457 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34670 event pairs, 555 based on Foata normal form. 1/5025 useless extension candidates. Maximal degree in co-relation 36636. Up to 4115 conditions per place. [2024-06-20 18:04:57,729 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 299 selfloop transitions, 150 changer transitions 0/458 dead transitions. [2024-06-20 18:04:57,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 458 transitions, 6887 flow [2024-06-20 18:04:57,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:04:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:04:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-20 18:04:57,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744186046511628 [2024-06-20 18:04:57,730 INFO L175 Difference]: Start difference. First operand has 322 places, 421 transitions, 5340 flow. Second operand 10 states and 247 transitions. [2024-06-20 18:04:57,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 458 transitions, 6887 flow [2024-06-20 18:05:00,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 458 transitions, 6679 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 18:05:00,164 INFO L231 Difference]: Finished difference. Result has 324 places, 430 transitions, 5612 flow [2024-06-20 18:05:00,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5612, PETRI_PLACES=324, PETRI_TRANSITIONS=430} [2024-06-20 18:05:00,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-20 18:05:00,165 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 430 transitions, 5612 flow [2024-06-20 18:05:00,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:00,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:00,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:00,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 18:05:00,166 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:00,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1143823592, now seen corresponding path program 6 times [2024-06-20 18:05:00,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:00,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047229996] [2024-06-20 18:05:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:00,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:00,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047229996] [2024-06-20 18:05:00,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047229996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:00,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:00,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:05:00,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867722072] [2024-06-20 18:05:00,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:00,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:05:00,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:00,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:05:00,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:05:00,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:05:00,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 430 transitions, 5612 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:00,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:00,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:05:00,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:01,605 INFO L124 PetriNetUnfolderBase]: 2896/5055 cut-off events. [2024-06-20 18:05:01,605 INFO L125 PetriNetUnfolderBase]: For 545639/545639 co-relation queries the response was YES. [2024-06-20 18:05:01,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37374 conditions, 5055 events. 2896/5055 cut-off events. For 545639/545639 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34784 event pairs, 563 based on Foata normal form. 1/5045 useless extension candidates. Maximal degree in co-relation 37222. Up to 4237 conditions per place. [2024-06-20 18:05:01,663 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 109 changer transitions 0/470 dead transitions. [2024-06-20 18:05:01,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 470 transitions, 6960 flow [2024-06-20 18:05:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:05:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:05:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-06-20 18:05:01,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5835095137420718 [2024-06-20 18:05:01,665 INFO L175 Difference]: Start difference. First operand has 324 places, 430 transitions, 5612 flow. Second operand 11 states and 276 transitions. [2024-06-20 18:05:01,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 470 transitions, 6960 flow [2024-06-20 18:05:03,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 470 transitions, 6558 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 18:05:03,956 INFO L231 Difference]: Finished difference. Result has 329 places, 436 transitions, 5586 flow [2024-06-20 18:05:03,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5236, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5586, PETRI_PLACES=329, PETRI_TRANSITIONS=436} [2024-06-20 18:05:03,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-20 18:05:03,956 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 436 transitions, 5586 flow [2024-06-20 18:05:03,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:03,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:03,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:03,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 18:05:03,957 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:03,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:03,957 INFO L85 PathProgramCache]: Analyzing trace with hash -747214392, now seen corresponding path program 7 times [2024-06-20 18:05:03,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:03,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864645475] [2024-06-20 18:05:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:03,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:04,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:04,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864645475] [2024-06-20 18:05:04,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864645475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:04,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:04,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:05:04,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325878024] [2024-06-20 18:05:04,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:04,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:05:04,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:04,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:05:04,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:05:04,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:05:04,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 436 transitions, 5586 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:04,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:04,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:05:04,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:05,229 INFO L124 PetriNetUnfolderBase]: 2893/5051 cut-off events. [2024-06-20 18:05:05,229 INFO L125 PetriNetUnfolderBase]: For 549466/549466 co-relation queries the response was YES. [2024-06-20 18:05:05,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36947 conditions, 5051 events. 2893/5051 cut-off events. For 549466/549466 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34708 event pairs, 561 based on Foata normal form. 1/5041 useless extension candidates. Maximal degree in co-relation 36794. Up to 4127 conditions per place. [2024-06-20 18:05:05,305 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 305 selfloop transitions, 156 changer transitions 0/470 dead transitions. [2024-06-20 18:05:05,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 470 transitions, 7008 flow [2024-06-20 18:05:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:05:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:05:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-20 18:05:05,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023255813953489 [2024-06-20 18:05:05,306 INFO L175 Difference]: Start difference. First operand has 329 places, 436 transitions, 5586 flow. Second operand 10 states and 259 transitions. [2024-06-20 18:05:05,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 470 transitions, 7008 flow [2024-06-20 18:05:07,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 470 transitions, 6730 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-20 18:05:07,577 INFO L231 Difference]: Finished difference. Result has 331 places, 436 transitions, 5626 flow [2024-06-20 18:05:07,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5308, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5626, PETRI_PLACES=331, PETRI_TRANSITIONS=436} [2024-06-20 18:05:07,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-20 18:05:07,578 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 436 transitions, 5626 flow [2024-06-20 18:05:07,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:07,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:07,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:07,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 18:05:07,578 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:07,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1137516060, now seen corresponding path program 8 times [2024-06-20 18:05:07,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:07,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596290515] [2024-06-20 18:05:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:07,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:07,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:07,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596290515] [2024-06-20 18:05:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596290515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:07,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:07,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:05:07,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077511019] [2024-06-20 18:05:07,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:07,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:05:07,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:05:07,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:05:07,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:05:07,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 436 transitions, 5626 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:07,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:07,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:05:07,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:08,779 INFO L124 PetriNetUnfolderBase]: 2914/5085 cut-off events. [2024-06-20 18:05:08,779 INFO L125 PetriNetUnfolderBase]: For 572050/572050 co-relation queries the response was YES. [2024-06-20 18:05:08,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37651 conditions, 5085 events. 2914/5085 cut-off events. For 572050/572050 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 35113 event pairs, 555 based on Foata normal form. 1/5078 useless extension candidates. Maximal degree in co-relation 37497. Up to 4151 conditions per place. [2024-06-20 18:05:08,852 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 296 selfloop transitions, 162 changer transitions 0/467 dead transitions. [2024-06-20 18:05:08,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 467 transitions, 7425 flow [2024-06-20 18:05:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:05:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:05:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-20 18:05:08,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5839793281653747 [2024-06-20 18:05:08,853 INFO L175 Difference]: Start difference. First operand has 331 places, 436 transitions, 5626 flow. Second operand 9 states and 226 transitions. [2024-06-20 18:05:08,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 467 transitions, 7425 flow [2024-06-20 18:05:11,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 467 transitions, 7049 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-20 18:05:11,035 INFO L231 Difference]: Finished difference. Result has 330 places, 445 transitions, 5781 flow [2024-06-20 18:05:11,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5781, PETRI_PLACES=330, PETRI_TRANSITIONS=445} [2024-06-20 18:05:11,036 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-20 18:05:11,036 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 445 transitions, 5781 flow [2024-06-20 18:05:11,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:11,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:11,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:11,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 18:05:11,036 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:11,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:11,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1667126634, now seen corresponding path program 9 times [2024-06-20 18:05:11,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:11,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835812020] [2024-06-20 18:05:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:11,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:11,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835812020] [2024-06-20 18:05:11,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835812020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:11,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:11,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:05:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887964054] [2024-06-20 18:05:11,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:11,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:05:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:11,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:05:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:05:11,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:05:11,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 445 transitions, 5781 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:11,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:11,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:05:11,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:12,336 INFO L124 PetriNetUnfolderBase]: 2911/5081 cut-off events. [2024-06-20 18:05:12,337 INFO L125 PetriNetUnfolderBase]: For 576301/576301 co-relation queries the response was YES. [2024-06-20 18:05:12,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37551 conditions, 5081 events. 2911/5081 cut-off events. For 576301/576301 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 35055 event pairs, 555 based on Foata normal form. 1/5074 useless extension candidates. Maximal degree in co-relation 37397. Up to 4148 conditions per place. [2024-06-20 18:05:12,399 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 292 selfloop transitions, 167 changer transitions 0/468 dead transitions. [2024-06-20 18:05:12,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 468 transitions, 7389 flow [2024-06-20 18:05:12,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:05:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:05:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-20 18:05:12,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674418604651162 [2024-06-20 18:05:12,400 INFO L175 Difference]: Start difference. First operand has 330 places, 445 transitions, 5781 flow. Second operand 10 states and 244 transitions. [2024-06-20 18:05:12,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 468 transitions, 7389 flow [2024-06-20 18:05:14,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 468 transitions, 7119 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 18:05:14,828 INFO L231 Difference]: Finished difference. Result has 336 places, 445 transitions, 5852 flow [2024-06-20 18:05:14,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5852, PETRI_PLACES=336, PETRI_TRANSITIONS=445} [2024-06-20 18:05:14,829 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-20 18:05:14,829 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 445 transitions, 5852 flow [2024-06-20 18:05:14,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:14,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:14,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:14,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 18:05:14,830 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:14,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:14,830 INFO L85 PathProgramCache]: Analyzing trace with hash 36168902, now seen corresponding path program 10 times [2024-06-20 18:05:14,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:14,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599823699] [2024-06-20 18:05:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:14,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:15,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599823699] [2024-06-20 18:05:15,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599823699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:15,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:15,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:05:15,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570180129] [2024-06-20 18:05:15,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:15,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:05:15,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:15,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:05:15,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:05:15,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:05:15,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 445 transitions, 5852 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:15,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:15,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:05:15,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:16,049 INFO L124 PetriNetUnfolderBase]: 2916/5075 cut-off events. [2024-06-20 18:05:16,049 INFO L125 PetriNetUnfolderBase]: For 586904/586904 co-relation queries the response was YES. [2024-06-20 18:05:16,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37734 conditions, 5075 events. 2916/5075 cut-off events. For 586904/586904 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35002 event pairs, 589 based on Foata normal form. 1/5068 useless extension candidates. Maximal degree in co-relation 37579. Up to 4154 conditions per place. [2024-06-20 18:05:16,120 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 290 selfloop transitions, 168 changer transitions 0/467 dead transitions. [2024-06-20 18:05:16,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 467 transitions, 7512 flow [2024-06-20 18:05:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:05:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:05:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 18:05:16,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788113695090439 [2024-06-20 18:05:16,121 INFO L175 Difference]: Start difference. First operand has 336 places, 445 transitions, 5852 flow. Second operand 9 states and 224 transitions. [2024-06-20 18:05:16,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 467 transitions, 7512 flow [2024-06-20 18:05:18,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 467 transitions, 7173 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 18:05:18,762 INFO L231 Difference]: Finished difference. Result has 337 places, 448 transitions, 5913 flow [2024-06-20 18:05:18,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5913, PETRI_PLACES=337, PETRI_TRANSITIONS=448} [2024-06-20 18:05:18,763 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-20 18:05:18,763 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 448 transitions, 5913 flow [2024-06-20 18:05:18,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:18,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:18,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:18,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 18:05:18,763 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:18,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2134191976, now seen corresponding path program 11 times [2024-06-20 18:05:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:18,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293616682] [2024-06-20 18:05:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:19,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:19,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293616682] [2024-06-20 18:05:19,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293616682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:19,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:19,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:05:19,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260971676] [2024-06-20 18:05:19,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:19,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:05:19,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:19,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:05:19,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:05:19,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:05:19,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 448 transitions, 5913 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:19,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:19,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:05:19,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:19,966 INFO L124 PetriNetUnfolderBase]: 2913/5071 cut-off events. [2024-06-20 18:05:19,966 INFO L125 PetriNetUnfolderBase]: For 591353/591353 co-relation queries the response was YES. [2024-06-20 18:05:20,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37674 conditions, 5071 events. 2913/5071 cut-off events. For 591353/591353 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35009 event pairs, 589 based on Foata normal form. 1/5064 useless extension candidates. Maximal degree in co-relation 37518. Up to 4151 conditions per place. [2024-06-20 18:05:20,041 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 290 selfloop transitions, 169 changer transitions 0/468 dead transitions. [2024-06-20 18:05:20,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 468 transitions, 7309 flow [2024-06-20 18:05:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:05:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:05:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-20 18:05:20,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560253699788583 [2024-06-20 18:05:20,043 INFO L175 Difference]: Start difference. First operand has 337 places, 448 transitions, 5913 flow. Second operand 11 states and 263 transitions. [2024-06-20 18:05:20,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 468 transitions, 7309 flow [2024-06-20 18:05:22,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 468 transitions, 6868 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 18:05:22,764 INFO L231 Difference]: Finished difference. Result has 341 places, 448 transitions, 5816 flow [2024-06-20 18:05:22,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5472, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5816, PETRI_PLACES=341, PETRI_TRANSITIONS=448} [2024-06-20 18:05:22,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-20 18:05:22,765 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 448 transitions, 5816 flow [2024-06-20 18:05:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:22,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:22,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:22,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 18:05:22,765 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:22,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1060069046, now seen corresponding path program 4 times [2024-06-20 18:05:22,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:22,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153014741] [2024-06-20 18:05:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:22,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:22,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:22,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153014741] [2024-06-20 18:05:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153014741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:22,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:22,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:05:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327542303] [2024-06-20 18:05:22,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:22,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:05:22,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:05:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:05:23,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:05:23,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 448 transitions, 5816 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:23,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:23,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:05:23,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:23,979 INFO L124 PetriNetUnfolderBase]: 2918/5092 cut-off events. [2024-06-20 18:05:23,980 INFO L125 PetriNetUnfolderBase]: For 600238/600238 co-relation queries the response was YES. [2024-06-20 18:05:24,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37753 conditions, 5092 events. 2918/5092 cut-off events. For 600238/600238 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35139 event pairs, 570 based on Foata normal form. 1/5082 useless extension candidates. Maximal degree in co-relation 37597. Up to 4242 conditions per place. [2024-06-20 18:05:24,046 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 347 selfloop transitions, 116 changer transitions 0/473 dead transitions. [2024-06-20 18:05:24,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 473 transitions, 7336 flow [2024-06-20 18:05:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:05:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:05:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 18:05:24,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-20 18:05:24,047 INFO L175 Difference]: Start difference. First operand has 341 places, 448 transitions, 5816 flow. Second operand 7 states and 186 transitions. [2024-06-20 18:05:24,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 473 transitions, 7336 flow [2024-06-20 18:05:26,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 473 transitions, 6929 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-20 18:05:26,578 INFO L231 Difference]: Finished difference. Result has 337 places, 454 transitions, 5766 flow [2024-06-20 18:05:26,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5766, PETRI_PLACES=337, PETRI_TRANSITIONS=454} [2024-06-20 18:05:26,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-20 18:05:26,578 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 454 transitions, 5766 flow [2024-06-20 18:05:26,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:26,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:26,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:26,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 18:05:26,579 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:26,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1429522440, now seen corresponding path program 5 times [2024-06-20 18:05:26,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:26,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341841540] [2024-06-20 18:05:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:26,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:26,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:26,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341841540] [2024-06-20 18:05:26,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341841540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:26,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:26,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:05:26,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292844017] [2024-06-20 18:05:26,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:26,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:05:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:05:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:05:26,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:05:26,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 454 transitions, 5766 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:26,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:26,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:05:26,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:27,717 INFO L124 PetriNetUnfolderBase]: 2931/5114 cut-off events. [2024-06-20 18:05:27,717 INFO L125 PetriNetUnfolderBase]: For 618167/618167 co-relation queries the response was YES. [2024-06-20 18:05:27,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38218 conditions, 5114 events. 2931/5114 cut-off events. For 618167/618167 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 35362 event pairs, 570 based on Foata normal form. 1/5104 useless extension candidates. Maximal degree in co-relation 38061. Up to 4257 conditions per place. [2024-06-20 18:05:27,786 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 114 changer transitions 0/476 dead transitions. [2024-06-20 18:05:27,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 476 transitions, 7300 flow [2024-06-20 18:05:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:05:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:05:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 18:05:27,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-06-20 18:05:27,788 INFO L175 Difference]: Start difference. First operand has 337 places, 454 transitions, 5766 flow. Second operand 7 states and 185 transitions. [2024-06-20 18:05:27,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 476 transitions, 7300 flow [2024-06-20 18:05:30,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 476 transitions, 6984 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-20 18:05:30,653 INFO L231 Difference]: Finished difference. Result has 340 places, 460 transitions, 5809 flow [2024-06-20 18:05:30,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5809, PETRI_PLACES=340, PETRI_TRANSITIONS=460} [2024-06-20 18:05:30,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-20 18:05:30,654 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 460 transitions, 5809 flow [2024-06-20 18:05:30,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:30,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:30,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:30,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 18:05:30,654 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:30,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1680466058, now seen corresponding path program 6 times [2024-06-20 18:05:30,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:30,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068612079] [2024-06-20 18:05:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:30,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:30,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:30,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068612079] [2024-06-20 18:05:30,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068612079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:30,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:30,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:05:30,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510761652] [2024-06-20 18:05:30,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:30,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:05:30,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:30,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:05:30,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:05:30,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:05:30,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 460 transitions, 5809 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:30,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:30,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:05:30,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:31,833 INFO L124 PetriNetUnfolderBase]: 2928/5110 cut-off events. [2024-06-20 18:05:31,833 INFO L125 PetriNetUnfolderBase]: For 619879/619879 co-relation queries the response was YES. [2024-06-20 18:05:31,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37789 conditions, 5110 events. 2928/5110 cut-off events. For 619879/619879 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 35293 event pairs, 570 based on Foata normal form. 1/5100 useless extension candidates. Maximal degree in co-relation 37631. Up to 4254 conditions per place. [2024-06-20 18:05:31,906 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 348 selfloop transitions, 117 changer transitions 0/475 dead transitions. [2024-06-20 18:05:31,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 475 transitions, 6997 flow [2024-06-20 18:05:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:05:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:05:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 18:05:31,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6112956810631229 [2024-06-20 18:05:31,907 INFO L175 Difference]: Start difference. First operand has 340 places, 460 transitions, 5809 flow. Second operand 7 states and 184 transitions. [2024-06-20 18:05:31,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 475 transitions, 6997 flow [2024-06-20 18:05:34,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 475 transitions, 6811 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 18:05:34,945 INFO L231 Difference]: Finished difference. Result has 344 places, 460 transitions, 5864 flow [2024-06-20 18:05:34,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5623, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5864, PETRI_PLACES=344, PETRI_TRANSITIONS=460} [2024-06-20 18:05:34,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-20 18:05:34,946 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 460 transitions, 5864 flow [2024-06-20 18:05:34,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:34,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:34,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:34,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 18:05:34,946 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:34,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash 971884844, now seen corresponding path program 7 times [2024-06-20 18:05:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:34,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832964754] [2024-06-20 18:05:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:34,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:35,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832964754] [2024-06-20 18:05:35,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832964754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:35,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:35,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:05:35,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162128958] [2024-06-20 18:05:35,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:35,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:05:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:05:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:05:35,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:05:35,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 460 transitions, 5864 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:35,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:35,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:05:35,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:36,103 INFO L124 PetriNetUnfolderBase]: 2949/5128 cut-off events. [2024-06-20 18:05:36,103 INFO L125 PetriNetUnfolderBase]: For 645168/645168 co-relation queries the response was YES. [2024-06-20 18:05:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38333 conditions, 5128 events. 2949/5128 cut-off events. For 645168/645168 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 35399 event pairs, 605 based on Foata normal form. 1/5121 useless extension candidates. Maximal degree in co-relation 38174. Up to 4278 conditions per place. [2024-06-20 18:05:36,174 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 351 selfloop transitions, 122 changer transitions 0/483 dead transitions. [2024-06-20 18:05:36,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 483 transitions, 7655 flow [2024-06-20 18:05:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:05:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:05:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 18:05:36,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-06-20 18:05:36,175 INFO L175 Difference]: Start difference. First operand has 344 places, 460 transitions, 5864 flow. Second operand 7 states and 185 transitions. [2024-06-20 18:05:36,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 483 transitions, 7655 flow [2024-06-20 18:05:39,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 483 transitions, 7387 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 18:05:39,532 INFO L231 Difference]: Finished difference. Result has 345 places, 469 transitions, 5987 flow [2024-06-20 18:05:39,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5987, PETRI_PLACES=345, PETRI_TRANSITIONS=469} [2024-06-20 18:05:39,532 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-20 18:05:39,532 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 469 transitions, 5987 flow [2024-06-20 18:05:39,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:39,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:39,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:39,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 18:05:39,556 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:39,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1968545898, now seen corresponding path program 8 times [2024-06-20 18:05:39,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:39,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396378994] [2024-06-20 18:05:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:39,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:39,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:39,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396378994] [2024-06-20 18:05:39,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396378994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:39,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:39,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:05:39,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298060373] [2024-06-20 18:05:39,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:39,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:05:39,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:39,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:05:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:05:39,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:05:39,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 469 transitions, 5987 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:39,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:39,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:05:39,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:40,810 INFO L124 PetriNetUnfolderBase]: 2946/5124 cut-off events. [2024-06-20 18:05:40,810 INFO L125 PetriNetUnfolderBase]: For 649355/649355 co-relation queries the response was YES. [2024-06-20 18:05:40,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38264 conditions, 5124 events. 2946/5124 cut-off events. For 649355/649355 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 35386 event pairs, 605 based on Foata normal form. 1/5117 useless extension candidates. Maximal degree in co-relation 38104. Up to 4275 conditions per place. [2024-06-20 18:05:40,871 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 350 selfloop transitions, 122 changer transitions 0/482 dead transitions. [2024-06-20 18:05:40,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 482 transitions, 7413 flow [2024-06-20 18:05:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:05:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:05:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 18:05:40,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079734219269103 [2024-06-20 18:05:40,873 INFO L175 Difference]: Start difference. First operand has 345 places, 469 transitions, 5987 flow. Second operand 7 states and 183 transitions. [2024-06-20 18:05:40,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 482 transitions, 7413 flow [2024-06-20 18:05:44,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 482 transitions, 7214 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-20 18:05:44,052 INFO L231 Difference]: Finished difference. Result has 350 places, 469 transitions, 6038 flow [2024-06-20 18:05:44,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6038, PETRI_PLACES=350, PETRI_TRANSITIONS=469} [2024-06-20 18:05:44,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-20 18:05:44,052 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 469 transitions, 6038 flow [2024-06-20 18:05:44,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:44,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:44,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:44,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 18:05:44,053 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:44,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1986434966, now seen corresponding path program 9 times [2024-06-20 18:05:44,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:44,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503370221] [2024-06-20 18:05:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:44,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:44,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:44,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503370221] [2024-06-20 18:05:44,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503370221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:44,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:44,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:05:44,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472246990] [2024-06-20 18:05:44,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:44,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:05:44,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:44,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:05:44,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:05:44,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:05:44,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 469 transitions, 6038 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:44,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:44,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:05:44,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:45,207 INFO L124 PetriNetUnfolderBase]: 2943/5120 cut-off events. [2024-06-20 18:05:45,207 INFO L125 PetriNetUnfolderBase]: For 654664/654664 co-relation queries the response was YES. [2024-06-20 18:05:45,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38209 conditions, 5120 events. 2943/5120 cut-off events. For 654664/654664 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 35386 event pairs, 605 based on Foata normal form. 1/5113 useless extension candidates. Maximal degree in co-relation 38047. Up to 4272 conditions per place. [2024-06-20 18:05:45,284 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 342 selfloop transitions, 129 changer transitions 0/481 dead transitions. [2024-06-20 18:05:45,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 481 transitions, 7236 flow [2024-06-20 18:05:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:05:45,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:05:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 18:05:45,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-20 18:05:45,286 INFO L175 Difference]: Start difference. First operand has 350 places, 469 transitions, 6038 flow. Second operand 7 states and 182 transitions. [2024-06-20 18:05:45,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 481 transitions, 7236 flow [2024-06-20 18:05:49,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 481 transitions, 7035 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 18:05:49,291 INFO L231 Difference]: Finished difference. Result has 353 places, 469 transitions, 6101 flow [2024-06-20 18:05:49,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5837, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6101, PETRI_PLACES=353, PETRI_TRANSITIONS=469} [2024-06-20 18:05:49,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-20 18:05:49,291 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 469 transitions, 6101 flow [2024-06-20 18:05:49,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:49,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:49,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:49,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 18:05:49,292 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:49,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1055031562, now seen corresponding path program 1 times [2024-06-20 18:05:49,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:49,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589765612] [2024-06-20 18:05:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:49,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:49,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:49,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589765612] [2024-06-20 18:05:49,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589765612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:49,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:49,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:05:49,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531263961] [2024-06-20 18:05:49,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:49,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:05:49,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:05:49,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:05:49,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:05:49,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 469 transitions, 6101 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:49,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:49,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:05:49,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:50,706 INFO L124 PetriNetUnfolderBase]: 2964/5171 cut-off events. [2024-06-20 18:05:50,706 INFO L125 PetriNetUnfolderBase]: For 691584/691584 co-relation queries the response was YES. [2024-06-20 18:05:50,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39069 conditions, 5171 events. 2964/5171 cut-off events. For 691584/691584 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35793 event pairs, 545 based on Foata normal form. 2/5164 useless extension candidates. Maximal degree in co-relation 38904. Up to 4465 conditions per place. [2024-06-20 18:05:50,787 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 448 selfloop transitions, 47 changer transitions 0/504 dead transitions. [2024-06-20 18:05:50,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 504 transitions, 7577 flow [2024-06-20 18:05:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:05:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:05:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-20 18:05:50,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5839793281653747 [2024-06-20 18:05:50,789 INFO L175 Difference]: Start difference. First operand has 353 places, 469 transitions, 6101 flow. Second operand 9 states and 226 transitions. [2024-06-20 18:05:50,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 504 transitions, 7577 flow [2024-06-20 18:05:54,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 504 transitions, 7281 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 18:05:54,162 INFO L231 Difference]: Finished difference. Result has 355 places, 473 transitions, 6088 flow [2024-06-20 18:05:54,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5805, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6088, PETRI_PLACES=355, PETRI_TRANSITIONS=473} [2024-06-20 18:05:54,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-20 18:05:54,162 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 473 transitions, 6088 flow [2024-06-20 18:05:54,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:54,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:54,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:54,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 18:05:54,163 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:54,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash -747205464, now seen corresponding path program 2 times [2024-06-20 18:05:54,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:54,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300818135] [2024-06-20 18:05:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:54,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:54,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:54,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300818135] [2024-06-20 18:05:54,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300818135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:54,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:54,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:05:54,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635705454] [2024-06-20 18:05:54,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:54,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:05:54,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:05:54,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:05:54,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:05:54,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 473 transitions, 6088 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:54,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:54,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:05:54,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:05:55,566 INFO L124 PetriNetUnfolderBase]: 2959/5173 cut-off events. [2024-06-20 18:05:55,566 INFO L125 PetriNetUnfolderBase]: For 687485/687485 co-relation queries the response was YES. [2024-06-20 18:05:55,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38748 conditions, 5173 events. 2959/5173 cut-off events. For 687485/687485 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35822 event pairs, 555 based on Foata normal form. 2/5168 useless extension candidates. Maximal degree in co-relation 38582. Up to 4429 conditions per place. [2024-06-20 18:05:55,641 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 424 selfloop transitions, 73 changer transitions 0/506 dead transitions. [2024-06-20 18:05:55,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 506 transitions, 7164 flow [2024-06-20 18:05:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:05:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:05:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-20 18:05:55,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-20 18:05:55,642 INFO L175 Difference]: Start difference. First operand has 355 places, 473 transitions, 6088 flow. Second operand 10 states and 250 transitions. [2024-06-20 18:05:55,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 506 transitions, 7164 flow [2024-06-20 18:05:59,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 506 transitions, 6945 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-20 18:05:59,317 INFO L231 Difference]: Finished difference. Result has 360 places, 473 transitions, 6020 flow [2024-06-20 18:05:59,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6020, PETRI_PLACES=360, PETRI_TRANSITIONS=473} [2024-06-20 18:05:59,317 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-20 18:05:59,317 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 473 transitions, 6020 flow [2024-06-20 18:05:59,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:59,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:05:59,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:05:59,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 18:05:59,318 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:05:59,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:05:59,318 INFO L85 PathProgramCache]: Analyzing trace with hash 495696466, now seen corresponding path program 1 times [2024-06-20 18:05:59,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:05:59,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581957871] [2024-06-20 18:05:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:05:59,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:05:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:05:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:05:59,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:05:59,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581957871] [2024-06-20 18:05:59,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581957871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:05:59,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:05:59,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:05:59,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909777783] [2024-06-20 18:05:59,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:05:59,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:05:59,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:05:59,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:05:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:05:59,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:05:59,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 473 transitions, 6020 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:05:59,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:05:59,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:05:59,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:00,788 INFO L124 PetriNetUnfolderBase]: 2972/5190 cut-off events. [2024-06-20 18:06:00,789 INFO L125 PetriNetUnfolderBase]: For 698731/698731 co-relation queries the response was YES. [2024-06-20 18:06:00,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38966 conditions, 5190 events. 2972/5190 cut-off events. For 698731/698731 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 35975 event pairs, 563 based on Foata normal form. 1/5179 useless extension candidates. Maximal degree in co-relation 38798. Up to 4307 conditions per place. [2024-06-20 18:06:00,854 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 364 selfloop transitions, 141 changer transitions 0/514 dead transitions. [2024-06-20 18:06:00,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 514 transitions, 7895 flow [2024-06-20 18:06:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:06:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:06:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-20 18:06:00,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023255813953489 [2024-06-20 18:06:00,855 INFO L175 Difference]: Start difference. First operand has 360 places, 473 transitions, 6020 flow. Second operand 10 states and 259 transitions. [2024-06-20 18:06:00,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 514 transitions, 7895 flow [2024-06-20 18:06:04,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 514 transitions, 7737 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 18:06:04,472 INFO L231 Difference]: Finished difference. Result has 361 places, 479 transitions, 6227 flow [2024-06-20 18:06:04,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6227, PETRI_PLACES=361, PETRI_TRANSITIONS=479} [2024-06-20 18:06:04,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-20 18:06:04,473 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 479 transitions, 6227 flow [2024-06-20 18:06:04,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:04,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:04,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:04,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 18:06:04,473 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:04,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1956924332, now seen corresponding path program 10 times [2024-06-20 18:06:04,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:04,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142599298] [2024-06-20 18:06:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:04,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:04,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:04,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142599298] [2024-06-20 18:06:04,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142599298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:04,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:04,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:06:04,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011074171] [2024-06-20 18:06:04,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:04,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:06:04,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:06:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:06:04,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:06:04,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 479 transitions, 6227 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:04,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:04,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:06:04,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:05,720 INFO L124 PetriNetUnfolderBase]: 2977/5206 cut-off events. [2024-06-20 18:06:05,720 INFO L125 PetriNetUnfolderBase]: For 710137/710137 co-relation queries the response was YES. [2024-06-20 18:06:05,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39284 conditions, 5206 events. 2977/5206 cut-off events. For 710137/710137 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36075 event pairs, 549 based on Foata normal form. 1/5200 useless extension candidates. Maximal degree in co-relation 39116. Up to 4521 conditions per place. [2024-06-20 18:06:05,797 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 458 selfloop transitions, 41 changer transitions 0/509 dead transitions. [2024-06-20 18:06:05,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 509 transitions, 7584 flow [2024-06-20 18:06:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:06:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:06:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-20 18:06:05,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445182724252492 [2024-06-20 18:06:05,798 INFO L175 Difference]: Start difference. First operand has 361 places, 479 transitions, 6227 flow. Second operand 7 states and 194 transitions. [2024-06-20 18:06:05,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 509 transitions, 7584 flow [2024-06-20 18:06:09,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 509 transitions, 7328 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 18:06:09,788 INFO L231 Difference]: Finished difference. Result has 362 places, 482 transitions, 6114 flow [2024-06-20 18:06:09,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5971, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6114, PETRI_PLACES=362, PETRI_TRANSITIONS=482} [2024-06-20 18:06:09,789 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-20 18:06:09,789 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 482 transitions, 6114 flow [2024-06-20 18:06:09,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:09,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:09,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:09,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 18:06:09,789 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:09,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:09,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1001644114, now seen corresponding path program 11 times [2024-06-20 18:06:09,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:09,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462931164] [2024-06-20 18:06:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:09,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:10,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:10,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462931164] [2024-06-20 18:06:10,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462931164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:10,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:10,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:06:10,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062719302] [2024-06-20 18:06:10,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:10,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:06:10,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:10,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:06:10,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:06:10,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:06:10,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 482 transitions, 6114 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:10,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:10,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:06:10,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:11,028 INFO L124 PetriNetUnfolderBase]: 2987/5224 cut-off events. [2024-06-20 18:06:11,028 INFO L125 PetriNetUnfolderBase]: For 720912/720912 co-relation queries the response was YES. [2024-06-20 18:06:11,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39221 conditions, 5224 events. 2987/5224 cut-off events. For 720912/720912 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36247 event pairs, 549 based on Foata normal form. 1/5218 useless extension candidates. Maximal degree in co-relation 39052. Up to 4531 conditions per place. [2024-06-20 18:06:11,106 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 459 selfloop transitions, 48 changer transitions 0/517 dead transitions. [2024-06-20 18:06:11,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 517 transitions, 7538 flow [2024-06-20 18:06:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:06:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:06:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-20 18:06:11,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098191214470284 [2024-06-20 18:06:11,107 INFO L175 Difference]: Start difference. First operand has 362 places, 482 transitions, 6114 flow. Second operand 9 states and 236 transitions. [2024-06-20 18:06:11,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 517 transitions, 7538 flow [2024-06-20 18:06:15,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 517 transitions, 7285 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 18:06:15,024 INFO L231 Difference]: Finished difference. Result has 366 places, 488 transitions, 6063 flow [2024-06-20 18:06:15,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5882, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6063, PETRI_PLACES=366, PETRI_TRANSITIONS=488} [2024-06-20 18:06:15,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-20 18:06:15,025 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 488 transitions, 6063 flow [2024-06-20 18:06:15,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:15,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:15,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:15,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 18:06:15,026 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:15,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash 160627410, now seen corresponding path program 3 times [2024-06-20 18:06:15,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:15,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295532967] [2024-06-20 18:06:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:15,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:15,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295532967] [2024-06-20 18:06:15,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295532967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:15,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:15,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:06:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490313559] [2024-06-20 18:06:15,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:15,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:06:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:06:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:06:15,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:06:15,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 488 transitions, 6063 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:15,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:15,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:06:15,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:16,242 INFO L124 PetriNetUnfolderBase]: 3014/5273 cut-off events. [2024-06-20 18:06:16,242 INFO L125 PetriNetUnfolderBase]: For 724032/724032 co-relation queries the response was YES. [2024-06-20 18:06:16,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38656 conditions, 5273 events. 3014/5273 cut-off events. For 724032/724032 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 36561 event pairs, 461 based on Foata normal form. 6/5272 useless extension candidates. Maximal degree in co-relation 38487. Up to 4472 conditions per place. [2024-06-20 18:06:16,318 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 473 selfloop transitions, 40 changer transitions 0/523 dead transitions. [2024-06-20 18:06:16,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 523 transitions, 7217 flow [2024-06-20 18:06:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:06:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:06:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-20 18:06:16,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-20 18:06:16,319 INFO L175 Difference]: Start difference. First operand has 366 places, 488 transitions, 6063 flow. Second operand 7 states and 196 transitions. [2024-06-20 18:06:16,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 523 transitions, 7217 flow [2024-06-20 18:06:20,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 523 transitions, 7095 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 18:06:20,260 INFO L231 Difference]: Finished difference. Result has 368 places, 490 transitions, 6059 flow [2024-06-20 18:06:20,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5941, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6059, PETRI_PLACES=368, PETRI_TRANSITIONS=490} [2024-06-20 18:06:20,261 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-20 18:06:20,261 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 490 transitions, 6059 flow [2024-06-20 18:06:20,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:20,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:20,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:20,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 18:06:20,261 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:20,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1450901888, now seen corresponding path program 12 times [2024-06-20 18:06:20,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987979490] [2024-06-20 18:06:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:20,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:20,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:20,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987979490] [2024-06-20 18:06:20,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987979490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:20,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:20,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:06:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180470776] [2024-06-20 18:06:20,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:06:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:06:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:06:20,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:06:20,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 490 transitions, 6059 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:20,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:20,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:06:20,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:21,660 INFO L124 PetriNetUnfolderBase]: 3019/5275 cut-off events. [2024-06-20 18:06:21,660 INFO L125 PetriNetUnfolderBase]: For 700122/700122 co-relation queries the response was YES. [2024-06-20 18:06:21,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38903 conditions, 5275 events. 3019/5275 cut-off events. For 700122/700122 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36761 event pairs, 557 based on Foata normal form. 1/5268 useless extension candidates. Maximal degree in co-relation 38731. Up to 4307 conditions per place. [2024-06-20 18:06:21,730 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 358 selfloop transitions, 164 changer transitions 0/531 dead transitions. [2024-06-20 18:06:21,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 531 transitions, 8227 flow [2024-06-20 18:06:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 18:06:21,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 18:06:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 301 transitions. [2024-06-20 18:06:21,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 18:06:21,732 INFO L175 Difference]: Start difference. First operand has 368 places, 490 transitions, 6059 flow. Second operand 12 states and 301 transitions. [2024-06-20 18:06:21,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 531 transitions, 8227 flow [2024-06-20 18:06:26,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 531 transitions, 8120 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 18:06:26,137 INFO L231 Difference]: Finished difference. Result has 375 places, 493 transitions, 6350 flow [2024-06-20 18:06:26,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6350, PETRI_PLACES=375, PETRI_TRANSITIONS=493} [2024-06-20 18:06:26,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-20 18:06:26,137 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 493 transitions, 6350 flow [2024-06-20 18:06:26,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:26,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:26,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:26,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 18:06:26,138 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:26,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:26,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2075094586, now seen corresponding path program 13 times [2024-06-20 18:06:26,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:26,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565755868] [2024-06-20 18:06:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:26,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:26,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565755868] [2024-06-20 18:06:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565755868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:26,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:26,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:06:26,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098539214] [2024-06-20 18:06:26,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:26,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:06:26,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:26,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:06:26,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:06:26,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:06:26,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 493 transitions, 6350 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:26,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:26,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:06:26,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:27,413 INFO L124 PetriNetUnfolderBase]: 3016/5271 cut-off events. [2024-06-20 18:06:27,413 INFO L125 PetriNetUnfolderBase]: For 703847/703847 co-relation queries the response was YES. [2024-06-20 18:06:27,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39080 conditions, 5271 events. 3016/5271 cut-off events. For 703847/703847 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36662 event pairs, 557 based on Foata normal form. 1/5264 useless extension candidates. Maximal degree in co-relation 38907. Up to 4304 conditions per place. [2024-06-20 18:06:27,487 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 353 selfloop transitions, 163 changer transitions 0/525 dead transitions. [2024-06-20 18:06:27,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 525 transitions, 8192 flow [2024-06-20 18:06:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:06:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:06:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-20 18:06:27,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5953488372093023 [2024-06-20 18:06:27,489 INFO L175 Difference]: Start difference. First operand has 375 places, 493 transitions, 6350 flow. Second operand 10 states and 256 transitions. [2024-06-20 18:06:27,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 525 transitions, 8192 flow [2024-06-20 18:06:32,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 525 transitions, 7861 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-20 18:06:32,128 INFO L231 Difference]: Finished difference. Result has 377 places, 493 transitions, 6351 flow [2024-06-20 18:06:32,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6019, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6351, PETRI_PLACES=377, PETRI_TRANSITIONS=493} [2024-06-20 18:06:32,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-20 18:06:32,129 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 493 transitions, 6351 flow [2024-06-20 18:06:32,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:32,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:32,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:32,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 18:06:32,129 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:32,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:32,130 INFO L85 PathProgramCache]: Analyzing trace with hash 97155526, now seen corresponding path program 14 times [2024-06-20 18:06:32,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:32,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635575971] [2024-06-20 18:06:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:32,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:32,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635575971] [2024-06-20 18:06:32,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635575971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:32,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:32,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:06:32,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097449086] [2024-06-20 18:06:32,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:32,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:06:32,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:06:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:06:32,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:06:32,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 493 transitions, 6351 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:32,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:32,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:06:32,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:33,478 INFO L124 PetriNetUnfolderBase]: 3013/5267 cut-off events. [2024-06-20 18:06:33,479 INFO L125 PetriNetUnfolderBase]: For 706689/706689 co-relation queries the response was YES. [2024-06-20 18:06:33,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38888 conditions, 5267 events. 3013/5267 cut-off events. For 706689/706689 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36727 event pairs, 557 based on Foata normal form. 1/5260 useless extension candidates. Maximal degree in co-relation 38715. Up to 4301 conditions per place. [2024-06-20 18:06:33,555 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 354 selfloop transitions, 168 changer transitions 0/531 dead transitions. [2024-06-20 18:06:33,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 531 transitions, 7981 flow [2024-06-20 18:06:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:06:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:06:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 279 transitions. [2024-06-20 18:06:33,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898520084566596 [2024-06-20 18:06:33,557 INFO L175 Difference]: Start difference. First operand has 377 places, 493 transitions, 6351 flow. Second operand 11 states and 279 transitions. [2024-06-20 18:06:33,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 531 transitions, 7981 flow [2024-06-20 18:06:37,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 531 transitions, 7621 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-20 18:06:37,377 INFO L231 Difference]: Finished difference. Result has 379 places, 493 transitions, 6333 flow [2024-06-20 18:06:37,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5991, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6333, PETRI_PLACES=379, PETRI_TRANSITIONS=493} [2024-06-20 18:06:37,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-20 18:06:37,377 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 493 transitions, 6333 flow [2024-06-20 18:06:37,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:37,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:37,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:37,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 18:06:37,378 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:37,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1612543544, now seen corresponding path program 15 times [2024-06-20 18:06:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:37,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96186050] [2024-06-20 18:06:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:37,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:37,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96186050] [2024-06-20 18:06:37,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96186050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:37,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:37,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:06:37,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557672876] [2024-06-20 18:06:37,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:37,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:06:37,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:06:37,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:06:37,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:06:37,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 493 transitions, 6333 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:37,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:37,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:06:37,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:38,684 INFO L124 PetriNetUnfolderBase]: 3010/5276 cut-off events. [2024-06-20 18:06:38,684 INFO L125 PetriNetUnfolderBase]: For 708358/708358 co-relation queries the response was YES. [2024-06-20 18:06:38,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38829 conditions, 5276 events. 3010/5276 cut-off events. For 708358/708358 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36748 event pairs, 546 based on Foata normal form. 1/5276 useless extension candidates. Maximal degree in co-relation 38655. Up to 4577 conditions per place. [2024-06-20 18:06:38,764 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 464 selfloop transitions, 41 changer transitions 0/514 dead transitions. [2024-06-20 18:06:38,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 514 transitions, 7643 flow [2024-06-20 18:06:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:06:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:06:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 18:06:38,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-20 18:06:38,765 INFO L175 Difference]: Start difference. First operand has 379 places, 493 transitions, 6333 flow. Second operand 7 states and 179 transitions. [2024-06-20 18:06:38,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 514 transitions, 7643 flow [2024-06-20 18:06:42,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 514 transitions, 7287 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 18:06:42,974 INFO L231 Difference]: Finished difference. Result has 376 places, 493 transitions, 6069 flow [2024-06-20 18:06:42,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6069, PETRI_PLACES=376, PETRI_TRANSITIONS=493} [2024-06-20 18:06:42,975 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-20 18:06:42,975 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 493 transitions, 6069 flow [2024-06-20 18:06:42,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:42,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:42,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 18:06:42,975 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:42,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1982814662, now seen corresponding path program 16 times [2024-06-20 18:06:42,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879256714] [2024-06-20 18:06:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:43,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879256714] [2024-06-20 18:06:43,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879256714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:43,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:43,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:06:43,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987779972] [2024-06-20 18:06:43,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:43,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:06:43,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:06:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:06:43,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:06:43,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 493 transitions, 6069 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:43,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:43,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:06:43,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:44,284 INFO L124 PetriNetUnfolderBase]: 3007/5272 cut-off events. [2024-06-20 18:06:44,284 INFO L125 PetriNetUnfolderBase]: For 710012/710012 co-relation queries the response was YES. [2024-06-20 18:06:44,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38374 conditions, 5272 events. 3007/5272 cut-off events. For 710012/710012 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36721 event pairs, 546 based on Foata normal form. 1/5272 useless extension candidates. Maximal degree in co-relation 38199. Up to 4574 conditions per place. [2024-06-20 18:06:44,368 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 458 selfloop transitions, 43 changer transitions 0/510 dead transitions. [2024-06-20 18:06:44,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 510 transitions, 7113 flow [2024-06-20 18:06:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:06:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:06:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 18:06:44,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-20 18:06:44,369 INFO L175 Difference]: Start difference. First operand has 376 places, 493 transitions, 6069 flow. Second operand 7 states and 176 transitions. [2024-06-20 18:06:44,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 510 transitions, 7113 flow [2024-06-20 18:06:48,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 510 transitions, 7047 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 18:06:48,746 INFO L231 Difference]: Finished difference. Result has 380 places, 493 transitions, 6099 flow [2024-06-20 18:06:48,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6099, PETRI_PLACES=380, PETRI_TRANSITIONS=493} [2024-06-20 18:06:48,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-20 18:06:48,746 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 493 transitions, 6099 flow [2024-06-20 18:06:48,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:48,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:48,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:48,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 18:06:48,747 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:48,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1331143428, now seen corresponding path program 17 times [2024-06-20 18:06:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:48,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435037136] [2024-06-20 18:06:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:49,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:49,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435037136] [2024-06-20 18:06:49,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435037136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:49,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:49,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:06:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096534108] [2024-06-20 18:06:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:49,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:06:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:06:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:06:49,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:06:49,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 493 transitions, 6099 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:49,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:49,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:06:49,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:50,116 INFO L124 PetriNetUnfolderBase]: 3012/5268 cut-off events. [2024-06-20 18:06:50,116 INFO L125 PetriNetUnfolderBase]: For 721167/721167 co-relation queries the response was YES. [2024-06-20 18:06:50,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38521 conditions, 5268 events. 3012/5268 cut-off events. For 721167/721167 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36691 event pairs, 563 based on Foata normal form. 1/5261 useless extension candidates. Maximal degree in co-relation 38345. Up to 4301 conditions per place. [2024-06-20 18:06:50,191 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 337 selfloop transitions, 171 changer transitions 0/517 dead transitions. [2024-06-20 18:06:50,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 517 transitions, 7460 flow [2024-06-20 18:06:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:06:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:06:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-20 18:06:50,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674418604651162 [2024-06-20 18:06:50,193 INFO L175 Difference]: Start difference. First operand has 380 places, 493 transitions, 6099 flow. Second operand 10 states and 244 transitions. [2024-06-20 18:06:50,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 517 transitions, 7460 flow [2024-06-20 18:06:55,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 517 transitions, 7340 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 18:06:55,015 INFO L231 Difference]: Finished difference. Result has 383 places, 496 transitions, 6370 flow [2024-06-20 18:06:55,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5979, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6370, PETRI_PLACES=383, PETRI_TRANSITIONS=496} [2024-06-20 18:06:55,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-20 18:06:55,016 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 496 transitions, 6370 flow [2024-06-20 18:06:55,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:55,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:06:55,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:06:55,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 18:06:55,016 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:06:55,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:06:55,017 INFO L85 PathProgramCache]: Analyzing trace with hash 578606794, now seen corresponding path program 12 times [2024-06-20 18:06:55,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:06:55,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646315167] [2024-06-20 18:06:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:06:55,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:06:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:06:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:06:55,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:06:55,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646315167] [2024-06-20 18:06:55,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646315167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:06:55,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:06:55,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:06:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286321676] [2024-06-20 18:06:55,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:06:55,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:06:55,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:06:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:06:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:06:55,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:06:55,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 496 transitions, 6370 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:06:55,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:06:55,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:06:55,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:06:56,392 INFO L124 PetriNetUnfolderBase]: 3025/5287 cut-off events. [2024-06-20 18:06:56,393 INFO L125 PetriNetUnfolderBase]: For 741325/741325 co-relation queries the response was YES. [2024-06-20 18:06:56,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39200 conditions, 5287 events. 3025/5287 cut-off events. For 741325/741325 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36883 event pairs, 571 based on Foata normal form. 1/5277 useless extension candidates. Maximal degree in co-relation 39024. Up to 4388 conditions per place. [2024-06-20 18:06:56,462 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 373 selfloop transitions, 141 changer transitions 0/524 dead transitions. [2024-06-20 18:06:56,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 524 transitions, 8054 flow [2024-06-20 18:06:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:06:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:06:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-20 18:06:56,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345514950166113 [2024-06-20 18:06:56,463 INFO L175 Difference]: Start difference. First operand has 383 places, 496 transitions, 6370 flow. Second operand 7 states and 191 transitions. [2024-06-20 18:06:56,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 524 transitions, 8054 flow [2024-06-20 18:07:00,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 524 transitions, 7757 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 18:07:00,615 INFO L231 Difference]: Finished difference. Result has 383 places, 502 transitions, 6456 flow [2024-06-20 18:07:00,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6073, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6456, PETRI_PLACES=383, PETRI_TRANSITIONS=502} [2024-06-20 18:07:00,615 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-20 18:07:00,616 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 502 transitions, 6456 flow [2024-06-20 18:07:00,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:00,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:00,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:00,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 18:07:00,616 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:00,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:00,616 INFO L85 PathProgramCache]: Analyzing trace with hash -627603178, now seen corresponding path program 13 times [2024-06-20 18:07:00,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:00,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48665350] [2024-06-20 18:07:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:00,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:00,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:00,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48665350] [2024-06-20 18:07:00,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48665350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:00,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:00,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:07:00,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301864423] [2024-06-20 18:07:00,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:00,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:07:00,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:07:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:07:00,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:07:00,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 502 transitions, 6456 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:00,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:00,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:07:00,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:07:01,847 INFO L124 PetriNetUnfolderBase]: 3030/5296 cut-off events. [2024-06-20 18:07:01,847 INFO L125 PetriNetUnfolderBase]: For 753852/753852 co-relation queries the response was YES. [2024-06-20 18:07:01,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39256 conditions, 5296 events. 3030/5296 cut-off events. For 753852/753852 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 36951 event pairs, 571 based on Foata normal form. 1/5286 useless extension candidates. Maximal degree in co-relation 39079. Up to 4394 conditions per place. [2024-06-20 18:07:01,926 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 373 selfloop transitions, 141 changer transitions 0/524 dead transitions. [2024-06-20 18:07:01,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 524 transitions, 8095 flow [2024-06-20 18:07:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:07:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:07:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 18:07:01,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245847176079734 [2024-06-20 18:07:01,927 INFO L175 Difference]: Start difference. First operand has 383 places, 502 transitions, 6456 flow. Second operand 7 states and 188 transitions. [2024-06-20 18:07:01,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 524 transitions, 8095 flow [2024-06-20 18:07:06,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 524 transitions, 7902 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 18:07:06,703 INFO L231 Difference]: Finished difference. Result has 387 places, 505 transitions, 6605 flow [2024-06-20 18:07:06,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6605, PETRI_PLACES=387, PETRI_TRANSITIONS=505} [2024-06-20 18:07:06,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-20 18:07:06,704 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 505 transitions, 6605 flow [2024-06-20 18:07:06,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:06,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:06,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:06,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 18:07:06,705 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:06,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:06,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1130367254, now seen corresponding path program 14 times [2024-06-20 18:07:06,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:06,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73331050] [2024-06-20 18:07:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:06,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:06,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:06,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73331050] [2024-06-20 18:07:06,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73331050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:06,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:06,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:07:06,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230320885] [2024-06-20 18:07:06,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:06,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:07:06,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:06,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:07:06,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:07:06,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:07:06,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 505 transitions, 6605 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:06,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:06,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:07:06,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:07:08,015 INFO L124 PetriNetUnfolderBase]: 3035/5305 cut-off events. [2024-06-20 18:07:08,015 INFO L125 PetriNetUnfolderBase]: For 766359/766359 co-relation queries the response was YES. [2024-06-20 18:07:08,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39435 conditions, 5305 events. 3035/5305 cut-off events. For 766359/766359 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 37005 event pairs, 571 based on Foata normal form. 1/5295 useless extension candidates. Maximal degree in co-relation 39257. Up to 4400 conditions per place. [2024-06-20 18:07:08,101 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 368 selfloop transitions, 146 changer transitions 0/524 dead transitions. [2024-06-20 18:07:08,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 524 transitions, 7985 flow [2024-06-20 18:07:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:07:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:07:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 18:07:08,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-20 18:07:08,102 INFO L175 Difference]: Start difference. First operand has 387 places, 505 transitions, 6605 flow. Second operand 8 states and 205 transitions. [2024-06-20 18:07:08,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 524 transitions, 7985 flow [2024-06-20 18:07:13,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 524 transitions, 7706 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 18:07:13,055 INFO L231 Difference]: Finished difference. Result has 391 places, 508 transitions, 6680 flow [2024-06-20 18:07:13,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6680, PETRI_PLACES=391, PETRI_TRANSITIONS=508} [2024-06-20 18:07:13,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-20 18:07:13,055 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 508 transitions, 6680 flow [2024-06-20 18:07:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:13,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:13,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:13,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 18:07:13,056 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:13,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash -329168406, now seen corresponding path program 18 times [2024-06-20 18:07:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:13,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282421468] [2024-06-20 18:07:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:13,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:13,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282421468] [2024-06-20 18:07:13,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282421468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:13,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:13,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:07:13,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335689701] [2024-06-20 18:07:13,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:13,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:07:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:07:13,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:07:13,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:07:13,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 508 transitions, 6680 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:13,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:13,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:07:13,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:07:14,418 INFO L124 PetriNetUnfolderBase]: 3032/5289 cut-off events. [2024-06-20 18:07:14,419 INFO L125 PetriNetUnfolderBase]: For 770402/770402 co-relation queries the response was YES. [2024-06-20 18:07:14,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39356 conditions, 5289 events. 3032/5289 cut-off events. For 770402/770402 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 36905 event pairs, 591 based on Foata normal form. 1/5282 useless extension candidates. Maximal degree in co-relation 39176. Up to 4330 conditions per place. [2024-06-20 18:07:14,499 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 342 selfloop transitions, 174 changer transitions 0/525 dead transitions. [2024-06-20 18:07:14,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 525 transitions, 7752 flow [2024-06-20 18:07:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:07:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:07:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-20 18:07:14,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604651162790698 [2024-06-20 18:07:14,500 INFO L175 Difference]: Start difference. First operand has 391 places, 508 transitions, 6680 flow. Second operand 10 states and 241 transitions. [2024-06-20 18:07:14,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 525 transitions, 7752 flow [2024-06-20 18:07:19,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 525 transitions, 7416 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 18:07:19,152 INFO L231 Difference]: Finished difference. Result has 395 places, 508 transitions, 6698 flow [2024-06-20 18:07:19,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6698, PETRI_PLACES=395, PETRI_TRANSITIONS=508} [2024-06-20 18:07:19,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-20 18:07:19,153 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 508 transitions, 6698 flow [2024-06-20 18:07:19,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:19,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:19,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:19,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 18:07:19,153 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:19,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1934455538, now seen corresponding path program 15 times [2024-06-20 18:07:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:19,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634901084] [2024-06-20 18:07:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:19,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:19,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:19,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634901084] [2024-06-20 18:07:19,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634901084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:19,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:19,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:07:19,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571185106] [2024-06-20 18:07:19,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:19,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:07:19,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:19,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:07:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:07:19,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:07:19,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 508 transitions, 6698 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:19,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:19,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:07:19,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:07:20,440 INFO L124 PetriNetUnfolderBase]: 3037/5306 cut-off events. [2024-06-20 18:07:20,440 INFO L125 PetriNetUnfolderBase]: For 781213/781213 co-relation queries the response was YES. [2024-06-20 18:07:20,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39574 conditions, 5306 events. 3037/5306 cut-off events. For 781213/781213 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 36962 event pairs, 582 based on Foata normal form. 1/5288 useless extension candidates. Maximal degree in co-relation 39394. Up to 4402 conditions per place. [2024-06-20 18:07:20,532 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 378 selfloop transitions, 149 changer transitions 0/537 dead transitions. [2024-06-20 18:07:20,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 537 transitions, 8652 flow [2024-06-20 18:07:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:07:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:07:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-20 18:07:20,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654485049833887 [2024-06-20 18:07:20,533 INFO L175 Difference]: Start difference. First operand has 395 places, 508 transitions, 6698 flow. Second operand 7 states and 197 transitions. [2024-06-20 18:07:20,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 537 transitions, 8652 flow [2024-06-20 18:07:25,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 537 transitions, 8352 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 18:07:25,445 INFO L231 Difference]: Finished difference. Result has 395 places, 511 transitions, 6752 flow [2024-06-20 18:07:25,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6752, PETRI_PLACES=395, PETRI_TRANSITIONS=511} [2024-06-20 18:07:25,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-20 18:07:25,445 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 511 transitions, 6752 flow [2024-06-20 18:07:25,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:25,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:25,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:25,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 18:07:25,446 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:25,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash 457750130, now seen corresponding path program 16 times [2024-06-20 18:07:25,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:25,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551423013] [2024-06-20 18:07:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:25,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:25,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551423013] [2024-06-20 18:07:25,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551423013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:25,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:25,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:07:25,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939084533] [2024-06-20 18:07:25,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:25,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:07:25,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:07:25,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:07:25,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:07:25,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 511 transitions, 6752 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:25,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:25,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:07:25,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:07:26,749 INFO L124 PetriNetUnfolderBase]: 3042/5315 cut-off events. [2024-06-20 18:07:26,750 INFO L125 PetriNetUnfolderBase]: For 793091/793091 co-relation queries the response was YES. [2024-06-20 18:07:26,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39664 conditions, 5315 events. 3042/5315 cut-off events. For 793091/793091 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37035 event pairs, 582 based on Foata normal form. 1/5297 useless extension candidates. Maximal degree in co-relation 39483. Up to 4408 conditions per place. [2024-06-20 18:07:26,832 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 375 selfloop transitions, 151 changer transitions 0/536 dead transitions. [2024-06-20 18:07:26,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 536 transitions, 8442 flow [2024-06-20 18:07:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:07:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:07:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-20 18:07:26,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2024-06-20 18:07:26,833 INFO L175 Difference]: Start difference. First operand has 395 places, 511 transitions, 6752 flow. Second operand 7 states and 192 transitions. [2024-06-20 18:07:26,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 536 transitions, 8442 flow [2024-06-20 18:07:31,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 536 transitions, 7792 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 18:07:31,430 INFO L231 Difference]: Finished difference. Result has 394 places, 514 transitions, 6466 flow [2024-06-20 18:07:31,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6117, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6466, PETRI_PLACES=394, PETRI_TRANSITIONS=514} [2024-06-20 18:07:31,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-20 18:07:31,431 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 514 transitions, 6466 flow [2024-06-20 18:07:31,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:31,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:31,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:31,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 18:07:31,431 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:31,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1042052146, now seen corresponding path program 17 times [2024-06-20 18:07:31,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:31,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246656562] [2024-06-20 18:07:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:31,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:31,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:31,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246656562] [2024-06-20 18:07:31,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246656562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:31,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:31,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:07:31,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141625488] [2024-06-20 18:07:31,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:31,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:07:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:31,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:07:31,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:07:31,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:07:31,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 514 transitions, 6466 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:31,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:31,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:07:31,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:07:32,856 INFO L124 PetriNetUnfolderBase]: 3047/5338 cut-off events. [2024-06-20 18:07:32,856 INFO L125 PetriNetUnfolderBase]: For 800162/800162 co-relation queries the response was YES. [2024-06-20 18:07:32,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39686 conditions, 5338 events. 3047/5338 cut-off events. For 800162/800162 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 37319 event pairs, 550 based on Foata normal form. 1/5332 useless extension candidates. Maximal degree in co-relation 39506. Up to 4644 conditions per place. [2024-06-20 18:07:32,932 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 487 selfloop transitions, 37 changer transitions 0/534 dead transitions. [2024-06-20 18:07:32,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 534 transitions, 7603 flow [2024-06-20 18:07:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:07:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:07:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 18:07:32,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-20 18:07:32,933 INFO L175 Difference]: Start difference. First operand has 394 places, 514 transitions, 6466 flow. Second operand 7 states and 182 transitions. [2024-06-20 18:07:32,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 534 transitions, 7603 flow [2024-06-20 18:07:38,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 534 transitions, 7307 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 18:07:38,200 INFO L231 Difference]: Finished difference. Result has 397 places, 517 transitions, 6303 flow [2024-06-20 18:07:38,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6303, PETRI_PLACES=397, PETRI_TRANSITIONS=517} [2024-06-20 18:07:38,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-20 18:07:38,201 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 517 transitions, 6303 flow [2024-06-20 18:07:38,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:38,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:38,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:38,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 18:07:38,201 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:38,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:38,202 INFO L85 PathProgramCache]: Analyzing trace with hash -573427474, now seen corresponding path program 18 times [2024-06-20 18:07:38,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:38,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219822395] [2024-06-20 18:07:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:38,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:38,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:38,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219822395] [2024-06-20 18:07:38,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219822395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:38,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:38,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:07:38,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042075681] [2024-06-20 18:07:38,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:38,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:07:38,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:38,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:07:38,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:07:38,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:07:38,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 517 transitions, 6303 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:38,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:38,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:07:38,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:07:39,602 INFO L124 PetriNetUnfolderBase]: 3052/5333 cut-off events. [2024-06-20 18:07:39,602 INFO L125 PetriNetUnfolderBase]: For 811531/811531 co-relation queries the response was YES. [2024-06-20 18:07:39,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39524 conditions, 5333 events. 3052/5333 cut-off events. For 811531/811531 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 37223 event pairs, 582 based on Foata normal form. 1/5315 useless extension candidates. Maximal degree in co-relation 39343. Up to 4420 conditions per place. [2024-06-20 18:07:39,675 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 369 selfloop transitions, 159 changer transitions 0/538 dead transitions. [2024-06-20 18:07:39,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 538 transitions, 7715 flow [2024-06-20 18:07:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:07:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:07:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-20 18:07:39,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212624584717608 [2024-06-20 18:07:39,677 INFO L175 Difference]: Start difference. First operand has 397 places, 517 transitions, 6303 flow. Second operand 7 states and 187 transitions. [2024-06-20 18:07:39,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 538 transitions, 7715 flow [2024-06-20 18:07:44,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 538 transitions, 7621 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 18:07:44,630 INFO L231 Difference]: Finished difference. Result has 400 places, 520 transitions, 6577 flow [2024-06-20 18:07:44,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6209, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6577, PETRI_PLACES=400, PETRI_TRANSITIONS=520} [2024-06-20 18:07:44,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-20 18:07:44,631 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 520 transitions, 6577 flow [2024-06-20 18:07:44,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:44,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:44,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:44,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 18:07:44,631 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:44,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1963066044, now seen corresponding path program 19 times [2024-06-20 18:07:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:44,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989297145] [2024-06-20 18:07:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:44,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989297145] [2024-06-20 18:07:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989297145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:44,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:44,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:07:44,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230948727] [2024-06-20 18:07:44,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:44,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:07:44,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:44,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:07:44,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:07:44,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:07:44,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 520 transitions, 6577 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:44,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:44,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:07:44,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:07:45,961 INFO L124 PetriNetUnfolderBase]: 3057/5328 cut-off events. [2024-06-20 18:07:45,961 INFO L125 PetriNetUnfolderBase]: For 824741/824741 co-relation queries the response was YES. [2024-06-20 18:07:46,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39933 conditions, 5328 events. 3057/5328 cut-off events. For 824741/824741 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37200 event pairs, 615 based on Foata normal form. 1/5321 useless extension candidates. Maximal degree in co-relation 39751. Up to 4426 conditions per place. [2024-06-20 18:07:46,045 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 369 selfloop transitions, 157 changer transitions 0/536 dead transitions. [2024-06-20 18:07:46,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 536 transitions, 7979 flow [2024-06-20 18:07:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:07:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:07:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 18:07:46,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-20 18:07:46,046 INFO L175 Difference]: Start difference. First operand has 400 places, 520 transitions, 6577 flow. Second operand 8 states and 204 transitions. [2024-06-20 18:07:46,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 536 transitions, 7979 flow [2024-06-20 18:07:51,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 536 transitions, 7696 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 18:07:51,325 INFO L231 Difference]: Finished difference. Result has 404 places, 523 transitions, 6664 flow [2024-06-20 18:07:51,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6297, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6664, PETRI_PLACES=404, PETRI_TRANSITIONS=523} [2024-06-20 18:07:51,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-20 18:07:51,325 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 523 transitions, 6664 flow [2024-06-20 18:07:51,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:51,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:51,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:51,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 18:07:51,326 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:51,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:51,326 INFO L85 PathProgramCache]: Analyzing trace with hash 654396070, now seen corresponding path program 20 times [2024-06-20 18:07:51,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:51,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802991716] [2024-06-20 18:07:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:51,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:51,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802991716] [2024-06-20 18:07:51,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802991716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:51,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:51,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:07:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280979527] [2024-06-20 18:07:51,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:07:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:07:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:07:51,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:07:51,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 523 transitions, 6664 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:51,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:51,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:07:51,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:07:52,627 INFO L124 PetriNetUnfolderBase]: 3054/5330 cut-off events. [2024-06-20 18:07:52,627 INFO L125 PetriNetUnfolderBase]: For 827710/827710 co-relation queries the response was YES. [2024-06-20 18:07:52,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39859 conditions, 5330 events. 3054/5330 cut-off events. For 827710/827710 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37300 event pairs, 606 based on Foata normal form. 1/5323 useless extension candidates. Maximal degree in co-relation 39676. Up to 4423 conditions per place. [2024-06-20 18:07:52,711 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 363 selfloop transitions, 164 changer transitions 0/537 dead transitions. [2024-06-20 18:07:52,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 537 transitions, 8294 flow [2024-06-20 18:07:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:07:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:07:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 18:07:52,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-20 18:07:52,712 INFO L175 Difference]: Start difference. First operand has 404 places, 523 transitions, 6664 flow. Second operand 8 states and 205 transitions. [2024-06-20 18:07:52,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 537 transitions, 8294 flow [2024-06-20 18:07:58,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 537 transitions, 8027 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 18:07:58,578 INFO L231 Difference]: Finished difference. Result has 407 places, 523 transitions, 6731 flow [2024-06-20 18:07:58,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6397, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6731, PETRI_PLACES=407, PETRI_TRANSITIONS=523} [2024-06-20 18:07:58,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-20 18:07:58,579 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 523 transitions, 6731 flow [2024-06-20 18:07:58,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:58,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:07:58,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:07:58,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 18:07:58,579 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:07:58,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:07:58,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1105826482, now seen corresponding path program 21 times [2024-06-20 18:07:58,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:07:58,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643404765] [2024-06-20 18:07:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:07:58,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:07:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:07:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:07:58,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:07:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643404765] [2024-06-20 18:07:58,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643404765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:07:58,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:07:58,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:07:58,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840324750] [2024-06-20 18:07:58,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:07:58,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:07:58,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:07:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:07:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:07:58,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:07:58,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 523 transitions, 6731 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:07:58,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:07:58,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:07:58,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:08:00,048 INFO L124 PetriNetUnfolderBase]: 3051/5326 cut-off events. [2024-06-20 18:08:00,048 INFO L125 PetriNetUnfolderBase]: For 830918/830918 co-relation queries the response was YES. [2024-06-20 18:08:00,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39772 conditions, 5326 events. 3051/5326 cut-off events. For 830918/830918 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37298 event pairs, 606 based on Foata normal form. 1/5319 useless extension candidates. Maximal degree in co-relation 39587. Up to 4420 conditions per place. [2024-06-20 18:08:00,125 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 362 selfloop transitions, 166 changer transitions 0/538 dead transitions. [2024-06-20 18:08:00,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 538 transitions, 8095 flow [2024-06-20 18:08:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:08:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:08:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-20 18:08:00,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767441860465117 [2024-06-20 18:08:00,126 INFO L175 Difference]: Start difference. First operand has 407 places, 523 transitions, 6731 flow. Second operand 10 states and 248 transitions. [2024-06-20 18:08:00,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 538 transitions, 8095 flow [2024-06-20 18:08:05,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 538 transitions, 7644 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 18:08:05,297 INFO L231 Difference]: Finished difference. Result has 410 places, 523 transitions, 6618 flow [2024-06-20 18:08:05,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6618, PETRI_PLACES=410, PETRI_TRANSITIONS=523} [2024-06-20 18:08:05,297 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-20 18:08:05,297 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 523 transitions, 6618 flow [2024-06-20 18:08:05,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:05,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:08:05,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:08:05,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 18:08:05,298 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:08:05,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:08:05,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1160555752, now seen corresponding path program 22 times [2024-06-20 18:08:05,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:08:05,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303663858] [2024-06-20 18:08:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:08:05,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:08:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:08:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:08:05,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:08:05,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303663858] [2024-06-20 18:08:05,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303663858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:08:05,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:08:05,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:08:05,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486729063] [2024-06-20 18:08:05,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:08:05,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:08:05,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:08:05,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:08:05,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:08:05,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:08:05,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 523 transitions, 6618 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:05,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:08:05,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:08:05,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:08:06,682 INFO L124 PetriNetUnfolderBase]: 3048/5338 cut-off events. [2024-06-20 18:08:06,683 INFO L125 PetriNetUnfolderBase]: For 830385/830385 co-relation queries the response was YES. [2024-06-20 18:08:06,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39625 conditions, 5338 events. 3048/5338 cut-off events. For 830385/830385 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37414 event pairs, 563 based on Foata normal form. 1/5334 useless extension candidates. Maximal degree in co-relation 39439. Up to 4646 conditions per place. [2024-06-20 18:08:06,904 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 488 selfloop transitions, 37 changer transitions 0/535 dead transitions. [2024-06-20 18:08:06,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 535 transitions, 7696 flow [2024-06-20 18:08:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:08:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:08:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 18:08:06,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726744186046512 [2024-06-20 18:08:06,906 INFO L175 Difference]: Start difference. First operand has 410 places, 523 transitions, 6618 flow. Second operand 8 states and 197 transitions. [2024-06-20 18:08:06,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 535 transitions, 7696 flow [2024-06-20 18:08:12,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 535 transitions, 7069 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-06-20 18:08:12,597 INFO L231 Difference]: Finished difference. Result has 405 places, 523 transitions, 6071 flow [2024-06-20 18:08:12,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5991, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6071, PETRI_PLACES=405, PETRI_TRANSITIONS=523} [2024-06-20 18:08:12,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-20 18:08:12,598 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 523 transitions, 6071 flow [2024-06-20 18:08:12,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:12,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:08:12,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:08:12,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 18:08:12,598 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:08:12,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:08:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1451178656, now seen corresponding path program 3 times [2024-06-20 18:08:12,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:08:12,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042283976] [2024-06-20 18:08:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:08:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:08:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:08:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:08:12,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:08:12,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042283976] [2024-06-20 18:08:12,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042283976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:08:12,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:08:12,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:08:12,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889207546] [2024-06-20 18:08:12,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:08:12,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:08:12,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:08:12,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:08:12,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:08:12,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:08:12,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 523 transitions, 6071 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:12,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:08:12,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:08:12,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:08:14,071 INFO L124 PetriNetUnfolderBase]: 3069/5367 cut-off events. [2024-06-20 18:08:14,071 INFO L125 PetriNetUnfolderBase]: For 872147/872147 co-relation queries the response was YES. [2024-06-20 18:08:14,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40068 conditions, 5367 events. 3069/5367 cut-off events. For 872147/872147 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37551 event pairs, 546 based on Foata normal form. 2/5364 useless extension candidates. Maximal degree in co-relation 39881. Up to 4558 conditions per place. [2024-06-20 18:08:14,156 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 479 selfloop transitions, 75 changer transitions 0/563 dead transitions. [2024-06-20 18:08:14,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 563 transitions, 7729 flow [2024-06-20 18:08:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:08:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:08:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-06-20 18:08:14,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572938689217759 [2024-06-20 18:08:14,157 INFO L175 Difference]: Start difference. First operand has 405 places, 523 transitions, 6071 flow. Second operand 11 states and 271 transitions. [2024-06-20 18:08:14,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 563 transitions, 7729 flow [2024-06-20 18:08:18,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 563 transitions, 7615 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 18:08:18,923 INFO L231 Difference]: Finished difference. Result has 407 places, 527 transitions, 6300 flow [2024-06-20 18:08:18,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6300, PETRI_PLACES=407, PETRI_TRANSITIONS=527} [2024-06-20 18:08:18,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-20 18:08:18,924 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 527 transitions, 6300 flow [2024-06-20 18:08:18,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:18,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:08:18,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:08:18,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 18:08:18,925 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:08:18,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:08:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1366845238, now seen corresponding path program 4 times [2024-06-20 18:08:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:08:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972158213] [2024-06-20 18:08:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:08:18,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:08:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:08:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:08:19,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:08:19,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972158213] [2024-06-20 18:08:19,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972158213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:08:19,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:08:19,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:08:19,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400017263] [2024-06-20 18:08:19,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:08:19,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:08:19,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:08:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:08:19,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:08:19,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:08:19,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 527 transitions, 6300 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:19,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:08:19,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:08:19,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:08:20,425 INFO L124 PetriNetUnfolderBase]: 3064/5367 cut-off events. [2024-06-20 18:08:20,425 INFO L125 PetriNetUnfolderBase]: For 866363/866363 co-relation queries the response was YES. [2024-06-20 18:08:20,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40007 conditions, 5367 events. 3064/5367 cut-off events. For 866363/866363 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37563 event pairs, 554 based on Foata normal form. 2/5364 useless extension candidates. Maximal degree in co-relation 39819. Up to 4586 conditions per place. [2024-06-20 18:08:20,507 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 478 selfloop transitions, 70 changer transitions 0/557 dead transitions. [2024-06-20 18:08:20,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 557 transitions, 7470 flow [2024-06-20 18:08:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:08:20,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:08:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-20 18:08:20,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720930232558139 [2024-06-20 18:08:20,508 INFO L175 Difference]: Start difference. First operand has 407 places, 527 transitions, 6300 flow. Second operand 10 states and 246 transitions. [2024-06-20 18:08:20,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 557 transitions, 7470 flow [2024-06-20 18:08:27,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 557 transitions, 7236 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-20 18:08:27,029 INFO L231 Difference]: Finished difference. Result has 411 places, 527 transitions, 6211 flow [2024-06-20 18:08:27,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6066, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6211, PETRI_PLACES=411, PETRI_TRANSITIONS=527} [2024-06-20 18:08:27,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-20 18:08:27,030 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 527 transitions, 6211 flow [2024-06-20 18:08:27,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:27,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:08:27,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:08:27,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 18:08:27,030 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:08:27,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:08:27,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1364043768, now seen corresponding path program 2 times [2024-06-20 18:08:27,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:08:27,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468860381] [2024-06-20 18:08:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:08:27,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:08:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:08:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:08:27,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:08:27,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468860381] [2024-06-20 18:08:27,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468860381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:08:27,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:08:27,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:08:27,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732672393] [2024-06-20 18:08:27,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:08:27,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:08:27,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:08:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:08:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:08:27,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:08:27,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 527 transitions, 6211 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:27,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:08:27,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:08:27,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:08:28,449 INFO L124 PetriNetUnfolderBase]: 3069/5374 cut-off events. [2024-06-20 18:08:28,449 INFO L125 PetriNetUnfolderBase]: For 864312/864312 co-relation queries the response was YES. [2024-06-20 18:08:28,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40007 conditions, 5374 events. 3069/5374 cut-off events. For 864312/864312 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 37643 event pairs, 558 based on Foata normal form. 1/5368 useless extension candidates. Maximal degree in co-relation 39817. Up to 4452 conditions per place. [2024-06-20 18:08:28,542 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 412 selfloop transitions, 141 changer transitions 0/562 dead transitions. [2024-06-20 18:08:28,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 562 transitions, 8282 flow [2024-06-20 18:08:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:08:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:08:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-20 18:08:28,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-20 18:08:28,543 INFO L175 Difference]: Start difference. First operand has 411 places, 527 transitions, 6211 flow. Second operand 10 states and 255 transitions. [2024-06-20 18:08:28,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 562 transitions, 8282 flow [2024-06-20 18:08:33,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 562 transitions, 8120 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 18:08:33,935 INFO L231 Difference]: Finished difference. Result has 412 places, 530 transitions, 6378 flow [2024-06-20 18:08:33,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6049, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6378, PETRI_PLACES=412, PETRI_TRANSITIONS=530} [2024-06-20 18:08:33,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-20 18:08:33,935 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 530 transitions, 6378 flow [2024-06-20 18:08:33,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:33,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:08:33,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:08:33,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 18:08:33,936 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:08:33,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:08:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1673490424, now seen corresponding path program 3 times [2024-06-20 18:08:33,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:08:33,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845066235] [2024-06-20 18:08:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:08:33,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:08:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:08:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:08:34,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:08:34,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845066235] [2024-06-20 18:08:34,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845066235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:08:34,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:08:34,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:08:34,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097965693] [2024-06-20 18:08:34,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:08:34,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:08:34,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:08:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:08:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:08:34,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:08:34,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 530 transitions, 6378 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:34,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:08:34,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:08:34,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:08:35,313 INFO L124 PetriNetUnfolderBase]: 3074/5392 cut-off events. [2024-06-20 18:08:35,314 INFO L125 PetriNetUnfolderBase]: For 876340/876340 co-relation queries the response was YES. [2024-06-20 18:08:35,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40319 conditions, 5392 events. 3074/5392 cut-off events. For 876340/876340 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37785 event pairs, 544 based on Foata normal form. 1/5392 useless extension candidates. Maximal degree in co-relation 40128. Up to 4681 conditions per place. [2024-06-20 18:08:35,400 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 499 selfloop transitions, 43 changer transitions 0/551 dead transitions. [2024-06-20 18:08:35,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 551 transitions, 7838 flow [2024-06-20 18:08:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:08:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:08:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 18:08:35,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-20 18:08:35,401 INFO L175 Difference]: Start difference. First operand has 412 places, 530 transitions, 6378 flow. Second operand 7 states and 177 transitions. [2024-06-20 18:08:35,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 551 transitions, 7838 flow [2024-06-20 18:08:41,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 551 transitions, 7598 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 18:08:41,584 INFO L231 Difference]: Finished difference. Result has 413 places, 533 transitions, 6282 flow [2024-06-20 18:08:41,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6282, PETRI_PLACES=413, PETRI_TRANSITIONS=533} [2024-06-20 18:08:41,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-20 18:08:41,585 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 533 transitions, 6282 flow [2024-06-20 18:08:41,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:41,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:08:41,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:08:41,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 18:08:41,586 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:08:41,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:08:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1925677062, now seen corresponding path program 4 times [2024-06-20 18:08:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:08:41,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746534077] [2024-06-20 18:08:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:08:41,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:08:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:08:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:08:41,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:08:41,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746534077] [2024-06-20 18:08:41,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746534077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:08:41,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:08:41,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:08:41,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640882976] [2024-06-20 18:08:41,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:08:41,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:08:41,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:08:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:08:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:08:41,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:08:41,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 533 transitions, 6282 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:41,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:08:41,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:08:41,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:08:42,975 INFO L124 PetriNetUnfolderBase]: 3071/5388 cut-off events. [2024-06-20 18:08:42,975 INFO L125 PetriNetUnfolderBase]: For 877252/877252 co-relation queries the response was YES. [2024-06-20 18:08:43,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39977 conditions, 5388 events. 3071/5388 cut-off events. For 877252/877252 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37774 event pairs, 544 based on Foata normal form. 1/5388 useless extension candidates. Maximal degree in co-relation 39785. Up to 4678 conditions per place. [2024-06-20 18:08:43,060 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 499 selfloop transitions, 43 changer transitions 0/551 dead transitions. [2024-06-20 18:08:43,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 551 transitions, 7410 flow [2024-06-20 18:08:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:08:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:08:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 18:08:43,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726744186046512 [2024-06-20 18:08:43,061 INFO L175 Difference]: Start difference. First operand has 413 places, 533 transitions, 6282 flow. Second operand 8 states and 197 transitions. [2024-06-20 18:08:43,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 551 transitions, 7410 flow [2024-06-20 18:08:49,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 551 transitions, 7300 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 18:08:49,680 INFO L231 Difference]: Finished difference. Result has 416 places, 533 transitions, 6268 flow [2024-06-20 18:08:49,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6268, PETRI_PLACES=416, PETRI_TRANSITIONS=533} [2024-06-20 18:08:49,681 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-20 18:08:49,681 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 533 transitions, 6268 flow [2024-06-20 18:08:49,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:49,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:08:49,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:08:49,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 18:08:49,682 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:08:49,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:08:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash 143714262, now seen corresponding path program 5 times [2024-06-20 18:08:49,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:08:49,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235232074] [2024-06-20 18:08:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:08:49,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:08:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:08:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:08:49,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:08:49,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235232074] [2024-06-20 18:08:49,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235232074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:08:49,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:08:49,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:08:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931526235] [2024-06-20 18:08:49,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:08:49,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:08:49,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:08:49,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:08:49,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:08:49,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:08:49,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 533 transitions, 6268 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:49,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:08:49,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:08:49,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:08:51,032 INFO L124 PetriNetUnfolderBase]: 3076/5388 cut-off events. [2024-06-20 18:08:51,032 INFO L125 PetriNetUnfolderBase]: For 889023/889023 co-relation queries the response was YES. [2024-06-20 18:08:51,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40089 conditions, 5388 events. 3076/5388 cut-off events. For 889023/889023 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 37749 event pairs, 558 based on Foata normal form. 1/5382 useless extension candidates. Maximal degree in co-relation 39896. Up to 4461 conditions per place. [2024-06-20 18:08:51,122 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 411 selfloop transitions, 147 changer transitions 0/567 dead transitions. [2024-06-20 18:08:51,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 567 transitions, 8357 flow [2024-06-20 18:08:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:08:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:08:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-20 18:08:51,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6072351421188631 [2024-06-20 18:08:51,123 INFO L175 Difference]: Start difference. First operand has 416 places, 533 transitions, 6268 flow. Second operand 9 states and 235 transitions. [2024-06-20 18:08:51,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 567 transitions, 8357 flow [2024-06-20 18:08:56,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 567 transitions, 8239 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 18:08:56,995 INFO L231 Difference]: Finished difference. Result has 417 places, 536 transitions, 6489 flow [2024-06-20 18:08:56,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6156, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6489, PETRI_PLACES=417, PETRI_TRANSITIONS=536} [2024-06-20 18:08:56,996 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-20 18:08:56,996 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 536 transitions, 6489 flow [2024-06-20 18:08:56,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:56,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:08:56,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:08:56,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 18:08:56,996 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:08:56,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:08:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1301517478, now seen corresponding path program 5 times [2024-06-20 18:08:56,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:08:56,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961730030] [2024-06-20 18:08:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:08:56,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:08:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:08:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:08:57,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:08:57,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961730030] [2024-06-20 18:08:57,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961730030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:08:57,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:08:57,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:08:57,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536179087] [2024-06-20 18:08:57,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:08:57,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:08:57,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:08:57,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:08:57,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:08:57,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:08:57,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 536 transitions, 6489 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:08:57,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:08:57,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:08:57,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:08:58,395 INFO L124 PetriNetUnfolderBase]: 3084/5406 cut-off events. [2024-06-20 18:08:58,395 INFO L125 PetriNetUnfolderBase]: For 902463/902463 co-relation queries the response was YES. [2024-06-20 18:08:58,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40574 conditions, 5406 events. 3084/5406 cut-off events. For 902463/902463 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 37968 event pairs, 556 based on Foata normal form. 2/5403 useless extension candidates. Maximal degree in co-relation 40381. Up to 4615 conditions per place. [2024-06-20 18:08:58,479 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 480 selfloop transitions, 70 changer transitions 0/559 dead transitions. [2024-06-20 18:08:58,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 559 transitions, 7735 flow [2024-06-20 18:08:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:08:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:08:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-20 18:08:58,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511627906976744 [2024-06-20 18:08:58,481 INFO L175 Difference]: Start difference. First operand has 417 places, 536 transitions, 6489 flow. Second operand 10 states and 237 transitions. [2024-06-20 18:08:58,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 559 transitions, 7735 flow [2024-06-20 18:09:03,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 559 transitions, 7425 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 18:09:03,202 INFO L231 Difference]: Finished difference. Result has 420 places, 538 transitions, 6424 flow [2024-06-20 18:09:03,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6179, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6424, PETRI_PLACES=420, PETRI_TRANSITIONS=538} [2024-06-20 18:09:03,202 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-20 18:09:03,202 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 538 transitions, 6424 flow [2024-06-20 18:09:03,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:03,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:09:03,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:09:03,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 18:09:03,203 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:09:03,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:09:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash -466149416, now seen corresponding path program 6 times [2024-06-20 18:09:03,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:09:03,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535540637] [2024-06-20 18:09:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:09:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:09:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:09:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:09:03,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:09:03,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535540637] [2024-06-20 18:09:03,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535540637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:09:03,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:09:03,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:09:03,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204165659] [2024-06-20 18:09:03,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:09:03,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:09:03,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:09:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:09:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:09:03,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:09:03,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 538 transitions, 6424 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:03,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:09:03,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:09:03,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:09:04,634 INFO L124 PetriNetUnfolderBase]: 3092/5418 cut-off events. [2024-06-20 18:09:04,634 INFO L125 PetriNetUnfolderBase]: For 916389/916389 co-relation queries the response was YES. [2024-06-20 18:09:04,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40750 conditions, 5418 events. 3092/5418 cut-off events. For 916389/916389 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 38022 event pairs, 554 based on Foata normal form. 2/5415 useless extension candidates. Maximal degree in co-relation 40556. Up to 4607 conditions per place. [2024-06-20 18:09:04,719 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 479 selfloop transitions, 75 changer transitions 0/563 dead transitions. [2024-06-20 18:09:04,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 563 transitions, 7686 flow [2024-06-20 18:09:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:09:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:09:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-20 18:09:04,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-20 18:09:04,721 INFO L175 Difference]: Start difference. First operand has 420 places, 538 transitions, 6424 flow. Second operand 11 states and 258 transitions. [2024-06-20 18:09:04,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 563 transitions, 7686 flow [2024-06-20 18:09:09,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 563 transitions, 7457 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-20 18:09:09,585 INFO L231 Difference]: Finished difference. Result has 423 places, 540 transitions, 6454 flow [2024-06-20 18:09:09,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6195, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6454, PETRI_PLACES=423, PETRI_TRANSITIONS=540} [2024-06-20 18:09:09,591 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-20 18:09:09,591 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 540 transitions, 6454 flow [2024-06-20 18:09:09,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:09,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:09:09,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:09:09,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 18:09:09,592 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:09:09,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:09:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1762378666, now seen corresponding path program 6 times [2024-06-20 18:09:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:09:09,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050390224] [2024-06-20 18:09:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:09:09,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:09:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:09:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:09:09,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:09:09,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050390224] [2024-06-20 18:09:09,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050390224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:09:09,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:09:09,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:09:09,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527564202] [2024-06-20 18:09:09,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:09:09,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:09:09,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:09:09,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:09:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:09:09,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:09:09,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 540 transitions, 6454 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:09,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:09:09,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:09:09,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:09:11,115 INFO L124 PetriNetUnfolderBase]: 3097/5425 cut-off events. [2024-06-20 18:09:11,115 INFO L125 PetriNetUnfolderBase]: For 916149/916149 co-relation queries the response was YES. [2024-06-20 18:09:11,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40813 conditions, 5425 events. 3097/5425 cut-off events. For 916149/916149 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 38118 event pairs, 560 based on Foata normal form. 1/5419 useless extension candidates. Maximal degree in co-relation 40618. Up to 4491 conditions per place. [2024-06-20 18:09:11,203 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 410 selfloop transitions, 145 changer transitions 0/564 dead transitions. [2024-06-20 18:09:11,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 564 transitions, 7947 flow [2024-06-20 18:09:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:09:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:09:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-20 18:09:11,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-20 18:09:11,204 INFO L175 Difference]: Start difference. First operand has 423 places, 540 transitions, 6454 flow. Second operand 10 states and 245 transitions. [2024-06-20 18:09:11,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 564 transitions, 7947 flow [2024-06-20 18:09:16,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 564 transitions, 7718 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-20 18:09:16,129 INFO L231 Difference]: Finished difference. Result has 425 places, 543 transitions, 6562 flow [2024-06-20 18:09:16,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6562, PETRI_PLACES=425, PETRI_TRANSITIONS=543} [2024-06-20 18:09:16,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-20 18:09:16,130 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 543 transitions, 6562 flow [2024-06-20 18:09:16,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:16,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:09:16,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:09:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 18:09:16,130 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:09:16,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:09:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1747141546, now seen corresponding path program 7 times [2024-06-20 18:09:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:09:16,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643363802] [2024-06-20 18:09:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:09:16,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:09:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:09:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:09:16,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:09:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643363802] [2024-06-20 18:09:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643363802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:09:16,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:09:16,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:09:16,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895934316] [2024-06-20 18:09:16,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:09:16,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:09:16,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:09:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:09:16,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:09:16,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:09:16,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 543 transitions, 6562 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:16,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:09:16,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:09:16,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:09:17,585 INFO L124 PetriNetUnfolderBase]: 3110/5447 cut-off events. [2024-06-20 18:09:17,586 INFO L125 PetriNetUnfolderBase]: For 937176/937176 co-relation queries the response was YES. [2024-06-20 18:09:17,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41180 conditions, 5447 events. 3110/5447 cut-off events. For 937176/937176 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 38250 event pairs, 560 based on Foata normal form. 1/5441 useless extension candidates. Maximal degree in co-relation 40984. Up to 4506 conditions per place. [2024-06-20 18:09:17,671 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 411 selfloop transitions, 151 changer transitions 0/571 dead transitions. [2024-06-20 18:09:17,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 571 transitions, 8420 flow [2024-06-20 18:09:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:09:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:09:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-20 18:09:17,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720930232558139 [2024-06-20 18:09:17,672 INFO L175 Difference]: Start difference. First operand has 425 places, 543 transitions, 6562 flow. Second operand 10 states and 246 transitions. [2024-06-20 18:09:17,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 571 transitions, 8420 flow [2024-06-20 18:09:22,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 571 transitions, 8165 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 18:09:22,906 INFO L231 Difference]: Finished difference. Result has 428 places, 549 transitions, 6709 flow [2024-06-20 18:09:22,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6313, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6709, PETRI_PLACES=428, PETRI_TRANSITIONS=549} [2024-06-20 18:09:22,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-20 18:09:22,907 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 549 transitions, 6709 flow [2024-06-20 18:09:22,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:22,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:09:22,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:09:22,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 18:09:22,907 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:09:22,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:09:22,907 INFO L85 PathProgramCache]: Analyzing trace with hash 645078808, now seen corresponding path program 8 times [2024-06-20 18:09:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:09:22,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615505357] [2024-06-20 18:09:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:09:22,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:09:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:09:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:09:23,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:09:23,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615505357] [2024-06-20 18:09:23,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615505357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:09:23,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:09:23,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:09:23,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175717068] [2024-06-20 18:09:23,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:09:23,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:09:23,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:09:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:09:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:09:23,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:09:23,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 549 transitions, 6709 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:23,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:09:23,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:09:23,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:09:24,426 INFO L124 PetriNetUnfolderBase]: 3123/5469 cut-off events. [2024-06-20 18:09:24,426 INFO L125 PetriNetUnfolderBase]: For 961229/961229 co-relation queries the response was YES. [2024-06-20 18:09:24,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41591 conditions, 5469 events. 3123/5469 cut-off events. For 961229/961229 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 38450 event pairs, 560 based on Foata normal form. 1/5463 useless extension candidates. Maximal degree in co-relation 41394. Up to 4521 conditions per place. [2024-06-20 18:09:24,513 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 408 selfloop transitions, 167 changer transitions 0/584 dead transitions. [2024-06-20 18:09:24,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 584 transitions, 8909 flow [2024-06-20 18:09:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:09:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:09:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-20 18:09:24,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-20 18:09:24,515 INFO L175 Difference]: Start difference. First operand has 428 places, 549 transitions, 6709 flow. Second operand 10 states and 250 transitions. [2024-06-20 18:09:24,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 584 transitions, 8909 flow [2024-06-20 18:09:30,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 584 transitions, 8642 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 18:09:30,455 INFO L231 Difference]: Finished difference. Result has 432 places, 555 transitions, 6875 flow [2024-06-20 18:09:30,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6448, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6875, PETRI_PLACES=432, PETRI_TRANSITIONS=555} [2024-06-20 18:09:30,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-20 18:09:30,456 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 555 transitions, 6875 flow [2024-06-20 18:09:30,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:30,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:09:30,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:09:30,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 18:09:30,456 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:09:30,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:09:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1130374198, now seen corresponding path program 9 times [2024-06-20 18:09:30,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:09:30,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303410640] [2024-06-20 18:09:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:09:30,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:09:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:09:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:09:30,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:09:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303410640] [2024-06-20 18:09:30,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303410640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:09:30,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:09:30,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:09:30,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662914814] [2024-06-20 18:09:30,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:09:30,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:09:30,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:09:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:09:30,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:09:30,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:09:30,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 555 transitions, 6875 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:30,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:09:30,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:09:30,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:09:31,986 INFO L124 PetriNetUnfolderBase]: 3128/5478 cut-off events. [2024-06-20 18:09:31,987 INFO L125 PetriNetUnfolderBase]: For 974568/974568 co-relation queries the response was YES. [2024-06-20 18:09:32,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41783 conditions, 5478 events. 3128/5478 cut-off events. For 974568/974568 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38568 event pairs, 560 based on Foata normal form. 1/5472 useless extension candidates. Maximal degree in co-relation 41585. Up to 4527 conditions per place. [2024-06-20 18:09:32,080 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 408 selfloop transitions, 165 changer transitions 0/582 dead transitions. [2024-06-20 18:09:32,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 582 transitions, 8718 flow [2024-06-20 18:09:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 18:09:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 18:09:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2024-06-20 18:09:32,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484496124031008 [2024-06-20 18:09:32,081 INFO L175 Difference]: Start difference. First operand has 432 places, 555 transitions, 6875 flow. Second operand 12 states and 283 transitions. [2024-06-20 18:09:32,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 582 transitions, 8718 flow [2024-06-20 18:09:38,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 582 transitions, 8420 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 18:09:38,831 INFO L231 Difference]: Finished difference. Result has 438 places, 558 transitions, 6958 flow [2024-06-20 18:09:38,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6580, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6958, PETRI_PLACES=438, PETRI_TRANSITIONS=558} [2024-06-20 18:09:38,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-20 18:09:38,843 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 558 transitions, 6958 flow [2024-06-20 18:09:38,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:38,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:09:38,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:09:38,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 18:09:38,844 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:09:38,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:09:38,844 INFO L85 PathProgramCache]: Analyzing trace with hash -866918394, now seen corresponding path program 10 times [2024-06-20 18:09:38,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:09:38,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398741748] [2024-06-20 18:09:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:09:38,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:09:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:09:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:09:39,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:09:39,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398741748] [2024-06-20 18:09:39,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398741748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:09:39,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:09:39,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:09:39,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365852631] [2024-06-20 18:09:39,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:09:39,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:09:39,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:09:39,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:09:39,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:09:39,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:09:39,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 558 transitions, 6958 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:39,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:09:39,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:09:39,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:09:40,320 INFO L124 PetriNetUnfolderBase]: 3125/5474 cut-off events. [2024-06-20 18:09:40,321 INFO L125 PetriNetUnfolderBase]: For 976298/976298 co-relation queries the response was YES. [2024-06-20 18:09:40,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41708 conditions, 5474 events. 3125/5474 cut-off events. For 976298/976298 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38536 event pairs, 560 based on Foata normal form. 1/5468 useless extension candidates. Maximal degree in co-relation 41509. Up to 4524 conditions per place. [2024-06-20 18:09:40,413 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 406 selfloop transitions, 165 changer transitions 0/580 dead transitions. [2024-06-20 18:09:40,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 580 transitions, 8452 flow [2024-06-20 18:09:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:09:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:09:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-20 18:09:40,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560253699788583 [2024-06-20 18:09:40,414 INFO L175 Difference]: Start difference. First operand has 438 places, 558 transitions, 6958 flow. Second operand 11 states and 263 transitions. [2024-06-20 18:09:40,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 580 transitions, 8452 flow [2024-06-20 18:09:46,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 580 transitions, 8168 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 18:09:46,841 INFO L231 Difference]: Finished difference. Result has 441 places, 558 transitions, 7010 flow [2024-06-20 18:09:46,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6674, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7010, PETRI_PLACES=441, PETRI_TRANSITIONS=558} [2024-06-20 18:09:46,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-20 18:09:46,841 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 558 transitions, 7010 flow [2024-06-20 18:09:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:46,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:09:46,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:09:46,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 18:09:46,842 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:09:46,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:09:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash -119081784, now seen corresponding path program 1 times [2024-06-20 18:09:46,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:09:46,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190753332] [2024-06-20 18:09:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:09:46,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:09:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:09:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:09:47,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:09:47,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190753332] [2024-06-20 18:09:47,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190753332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:09:47,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:09:47,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:09:47,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682461966] [2024-06-20 18:09:47,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:09:47,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:09:47,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:09:47,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:09:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:09:47,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:09:47,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 558 transitions, 7010 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:47,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:09:47,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:09:47,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:09:48,220 INFO L124 PetriNetUnfolderBase]: 3133/5486 cut-off events. [2024-06-20 18:09:48,220 INFO L125 PetriNetUnfolderBase]: For 1002087/1002087 co-relation queries the response was YES. [2024-06-20 18:09:48,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41972 conditions, 5486 events. 3133/5486 cut-off events. For 1002087/1002087 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 38619 event pairs, 560 based on Foata normal form. 2/5481 useless extension candidates. Maximal degree in co-relation 41773. Up to 4705 conditions per place. [2024-06-20 18:09:48,314 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 493 selfloop transitions, 75 changer transitions 0/578 dead transitions. [2024-06-20 18:09:48,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 578 transitions, 8258 flow [2024-06-20 18:09:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:09:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:09:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 18:09:48,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-20 18:09:48,315 INFO L175 Difference]: Start difference. First operand has 441 places, 558 transitions, 7010 flow. Second operand 7 states and 182 transitions. [2024-06-20 18:09:48,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 578 transitions, 8258 flow [2024-06-20 18:09:54,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 578 transitions, 7842 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-20 18:09:54,797 INFO L231 Difference]: Finished difference. Result has 437 places, 560 transitions, 6822 flow [2024-06-20 18:09:54,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6594, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6822, PETRI_PLACES=437, PETRI_TRANSITIONS=560} [2024-06-20 18:09:54,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-20 18:09:54,797 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 560 transitions, 6822 flow [2024-06-20 18:09:54,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:54,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:09:54,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:09:54,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 18:09:54,798 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:09:54,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:09:54,798 INFO L85 PathProgramCache]: Analyzing trace with hash -875480346, now seen corresponding path program 2 times [2024-06-20 18:09:54,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:09:54,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026377586] [2024-06-20 18:09:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:09:54,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:09:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:09:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:09:55,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:09:55,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026377586] [2024-06-20 18:09:55,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026377586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:09:55,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:09:55,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:09:55,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951920056] [2024-06-20 18:09:55,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:09:55,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:09:55,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:09:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:09:55,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:09:55,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:09:55,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 560 transitions, 6822 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:09:55,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:09:55,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:09:55,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:09:56,414 INFO L124 PetriNetUnfolderBase]: 3141/5502 cut-off events. [2024-06-20 18:09:56,415 INFO L125 PetriNetUnfolderBase]: For 1014646/1014646 co-relation queries the response was YES. [2024-06-20 18:09:56,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41991 conditions, 5502 events. 3141/5502 cut-off events. For 1014646/1014646 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 38764 event pairs, 562 based on Foata normal form. 2/5497 useless extension candidates. Maximal degree in co-relation 41791. Up to 4719 conditions per place. [2024-06-20 18:09:56,500 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 495 selfloop transitions, 73 changer transitions 0/578 dead transitions. [2024-06-20 18:09:56,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 578 transitions, 8068 flow [2024-06-20 18:09:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:09:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:09:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 18:09:56,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-20 18:09:56,502 INFO L175 Difference]: Start difference. First operand has 437 places, 560 transitions, 6822 flow. Second operand 8 states and 200 transitions. [2024-06-20 18:09:56,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 578 transitions, 8068 flow [2024-06-20 18:10:03,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 578 transitions, 7858 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 18:10:03,305 INFO L231 Difference]: Finished difference. Result has 440 places, 562 transitions, 6839 flow [2024-06-20 18:10:03,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6839, PETRI_PLACES=440, PETRI_TRANSITIONS=562} [2024-06-20 18:10:03,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-20 18:10:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 562 transitions, 6839 flow [2024-06-20 18:10:03,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:03,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:10:03,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:10:03,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 18:10:03,306 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:10:03,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:10:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash -147301656, now seen corresponding path program 3 times [2024-06-20 18:10:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:10:03,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796561323] [2024-06-20 18:10:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:10:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:10:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:10:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:10:03,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:10:03,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796561323] [2024-06-20 18:10:03,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796561323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:10:03,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:10:03,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:10:03,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073675542] [2024-06-20 18:10:03,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:10:03,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:10:03,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:10:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:10:03,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:10:03,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:10:03,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 562 transitions, 6839 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:03,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:10:03,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:10:03,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:10:04,950 INFO L124 PetriNetUnfolderBase]: 3149/5514 cut-off events. [2024-06-20 18:10:04,951 INFO L125 PetriNetUnfolderBase]: For 1028740/1028740 co-relation queries the response was YES. [2024-06-20 18:10:05,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42200 conditions, 5514 events. 3149/5514 cut-off events. For 1028740/1028740 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 38876 event pairs, 560 based on Foata normal form. 2/5509 useless extension candidates. Maximal degree in co-relation 41999. Up to 4709 conditions per place. [2024-06-20 18:10:05,036 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 494 selfloop transitions, 78 changer transitions 0/582 dead transitions. [2024-06-20 18:10:05,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 582 transitions, 8101 flow [2024-06-20 18:10:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:10:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:10:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 18:10:05,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-20 18:10:05,037 INFO L175 Difference]: Start difference. First operand has 440 places, 562 transitions, 6839 flow. Second operand 9 states and 222 transitions. [2024-06-20 18:10:05,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 582 transitions, 8101 flow [2024-06-20 18:10:11,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 582 transitions, 7890 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 18:10:11,492 INFO L231 Difference]: Finished difference. Result has 443 places, 564 transitions, 6869 flow [2024-06-20 18:10:11,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6628, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6869, PETRI_PLACES=443, PETRI_TRANSITIONS=564} [2024-06-20 18:10:11,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-20 18:10:11,493 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 564 transitions, 6869 flow [2024-06-20 18:10:11,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:11,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:10:11,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:10:11,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 18:10:11,494 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:10:11,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:10:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1700331478, now seen corresponding path program 11 times [2024-06-20 18:10:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:10:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025362813] [2024-06-20 18:10:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:10:11,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:10:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:10:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:10:11,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:10:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025362813] [2024-06-20 18:10:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025362813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:10:11,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:10:11,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:10:11,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817554149] [2024-06-20 18:10:11,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:10:11,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:10:11,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:10:11,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:10:11,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:10:11,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:10:11,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 564 transitions, 6869 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:11,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:10:11,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:10:11,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:10:13,076 INFO L124 PetriNetUnfolderBase]: 3154/5519 cut-off events. [2024-06-20 18:10:13,077 INFO L125 PetriNetUnfolderBase]: For 1030425/1030425 co-relation queries the response was YES. [2024-06-20 18:10:13,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42303 conditions, 5519 events. 3154/5519 cut-off events. For 1030425/1030425 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38893 event pairs, 568 based on Foata normal form. 1/5508 useless extension candidates. Maximal degree in co-relation 42100. Up to 4566 conditions per place. [2024-06-20 18:10:13,166 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 420 selfloop transitions, 171 changer transitions 0/600 dead transitions. [2024-06-20 18:10:13,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 600 transitions, 8791 flow [2024-06-20 18:10:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:10:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:10:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-20 18:10:13,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149870801033591 [2024-06-20 18:10:13,167 INFO L175 Difference]: Start difference. First operand has 443 places, 564 transitions, 6869 flow. Second operand 9 states and 238 transitions. [2024-06-20 18:10:13,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 600 transitions, 8791 flow [2024-06-20 18:10:21,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 600 transitions, 8566 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 18:10:21,277 INFO L231 Difference]: Finished difference. Result has 445 places, 567 transitions, 7034 flow [2024-06-20 18:10:21,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6644, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7034, PETRI_PLACES=445, PETRI_TRANSITIONS=567} [2024-06-20 18:10:21,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-20 18:10:21,278 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 567 transitions, 7034 flow [2024-06-20 18:10:21,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:21,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:10:21,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:10:21,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 18:10:21,278 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:10:21,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:10:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1621045632, now seen corresponding path program 12 times [2024-06-20 18:10:21,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:10:21,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794369585] [2024-06-20 18:10:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:10:21,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:10:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:10:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:10:21,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:10:21,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794369585] [2024-06-20 18:10:21,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794369585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:10:21,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:10:21,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:10:21,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925706672] [2024-06-20 18:10:21,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:10:21,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:10:21,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:10:21,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:10:21,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:10:21,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:10:21,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 567 transitions, 7034 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:21,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:10:21,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:10:21,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:10:22,846 INFO L124 PetriNetUnfolderBase]: 3159/5528 cut-off events. [2024-06-20 18:10:22,846 INFO L125 PetriNetUnfolderBase]: For 1042928/1042928 co-relation queries the response was YES. [2024-06-20 18:10:22,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42551 conditions, 5528 events. 3159/5528 cut-off events. For 1042928/1042928 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38952 event pairs, 568 based on Foata normal form. 1/5517 useless extension candidates. Maximal degree in co-relation 42347. Up to 4572 conditions per place. [2024-06-20 18:10:22,935 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 421 selfloop transitions, 175 changer transitions 0/605 dead transitions. [2024-06-20 18:10:22,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 605 transitions, 8980 flow [2024-06-20 18:10:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:10:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:10:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 278 transitions. [2024-06-20 18:10:22,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.587737843551797 [2024-06-20 18:10:22,936 INFO L175 Difference]: Start difference. First operand has 445 places, 567 transitions, 7034 flow. Second operand 11 states and 278 transitions. [2024-06-20 18:10:22,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 605 transitions, 8980 flow [2024-06-20 18:10:30,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 605 transitions, 8616 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 18:10:30,723 INFO L231 Difference]: Finished difference. Result has 449 places, 570 transitions, 7074 flow [2024-06-20 18:10:30,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6676, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7074, PETRI_PLACES=449, PETRI_TRANSITIONS=570} [2024-06-20 18:10:30,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-20 18:10:30,724 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 570 transitions, 7074 flow [2024-06-20 18:10:30,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:30,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:10:30,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:10:30,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 18:10:30,725 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:10:30,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:10:30,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1693656310, now seen corresponding path program 4 times [2024-06-20 18:10:30,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:10:30,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265513418] [2024-06-20 18:10:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:10:30,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:10:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:10:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:10:30,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:10:30,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265513418] [2024-06-20 18:10:30,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265513418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:10:30,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:10:30,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:10:30,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935792729] [2024-06-20 18:10:30,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:10:30,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:10:30,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:10:30,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:10:30,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:10:31,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:10:31,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 570 transitions, 7074 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:31,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:10:31,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:10:31,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:10:32,210 INFO L124 PetriNetUnfolderBase]: 3167/5540 cut-off events. [2024-06-20 18:10:32,210 INFO L125 PetriNetUnfolderBase]: For 1069313/1069313 co-relation queries the response was YES. [2024-06-20 18:10:32,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42802 conditions, 5540 events. 3167/5540 cut-off events. For 1069313/1069313 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 39000 event pairs, 568 based on Foata normal form. 2/5530 useless extension candidates. Maximal degree in co-relation 42598. Up to 4757 conditions per place. [2024-06-20 18:10:32,303 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 507 selfloop transitions, 76 changer transitions 0/593 dead transitions. [2024-06-20 18:10:32,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 593 transitions, 8372 flow [2024-06-20 18:10:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:10:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:10:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 18:10:32,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-20 18:10:32,305 INFO L175 Difference]: Start difference. First operand has 449 places, 570 transitions, 7074 flow. Second operand 7 states and 186 transitions. [2024-06-20 18:10:32,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 593 transitions, 8372 flow [2024-06-20 18:10:39,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 593 transitions, 8004 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 18:10:39,313 INFO L231 Difference]: Finished difference. Result has 447 places, 572 transitions, 6947 flow [2024-06-20 18:10:39,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6706, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6947, PETRI_PLACES=447, PETRI_TRANSITIONS=572} [2024-06-20 18:10:39,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-20 18:10:39,313 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 572 transitions, 6947 flow [2024-06-20 18:10:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:39,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:10:39,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:10:39,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 18:10:39,314 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:10:39,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:10:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash 884233190, now seen corresponding path program 7 times [2024-06-20 18:10:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:10:39,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809141674] [2024-06-20 18:10:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:10:39,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:10:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:10:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:10:39,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:10:39,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809141674] [2024-06-20 18:10:39,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809141674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:10:39,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:10:39,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:10:39,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351066264] [2024-06-20 18:10:39,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:10:39,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:10:39,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:10:39,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:10:39,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:10:39,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:10:39,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 572 transitions, 6947 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:39,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:10:39,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:10:39,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:10:41,000 INFO L124 PetriNetUnfolderBase]: 3175/5553 cut-off events. [2024-06-20 18:10:41,001 INFO L125 PetriNetUnfolderBase]: For 1085260/1085260 co-relation queries the response was YES. [2024-06-20 18:10:41,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42924 conditions, 5553 events. 3175/5553 cut-off events. For 1085260/1085260 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 39208 event pairs, 573 based on Foata normal form. 2/5550 useless extension candidates. Maximal degree in co-relation 42718. Up to 4747 conditions per place. [2024-06-20 18:10:41,109 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 510 selfloop transitions, 73 changer transitions 0/592 dead transitions. [2024-06-20 18:10:41,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 592 transitions, 8267 flow [2024-06-20 18:10:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:10:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:10:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-20 18:10:41,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-20 18:10:41,111 INFO L175 Difference]: Start difference. First operand has 447 places, 572 transitions, 6947 flow. Second operand 10 states and 235 transitions. [2024-06-20 18:10:41,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 592 transitions, 8267 flow [2024-06-20 18:10:49,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 592 transitions, 8042 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 18:10:49,438 INFO L231 Difference]: Finished difference. Result has 452 places, 574 transitions, 6989 flow [2024-06-20 18:10:49,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6722, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6989, PETRI_PLACES=452, PETRI_TRANSITIONS=574} [2024-06-20 18:10:49,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-20 18:10:49,438 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 574 transitions, 6989 flow [2024-06-20 18:10:49,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:49,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:10:49,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:10:49,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 18:10:49,439 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:10:49,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:10:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1406186664, now seen corresponding path program 8 times [2024-06-20 18:10:49,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:10:49,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045078555] [2024-06-20 18:10:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:10:49,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:10:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:10:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:10:49,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:10:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045078555] [2024-06-20 18:10:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045078555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:10:49,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:10:49,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:10:49,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974029622] [2024-06-20 18:10:49,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:10:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:10:49,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:10:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:10:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:10:49,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:10:49,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 574 transitions, 6989 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:49,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:10:49,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:10:49,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:10:51,072 INFO L124 PetriNetUnfolderBase]: 3170/5546 cut-off events. [2024-06-20 18:10:51,073 INFO L125 PetriNetUnfolderBase]: For 1072584/1072584 co-relation queries the response was YES. [2024-06-20 18:10:51,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42521 conditions, 5546 events. 3170/5546 cut-off events. For 1072584/1072584 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 39117 event pairs, 570 based on Foata normal form. 2/5543 useless extension candidates. Maximal degree in co-relation 42314. Up to 4720 conditions per place. [2024-06-20 18:10:51,168 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 509 selfloop transitions, 78 changer transitions 0/596 dead transitions. [2024-06-20 18:10:51,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 596 transitions, 8325 flow [2024-06-20 18:10:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:10:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:10:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-20 18:10:51,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412262156448203 [2024-06-20 18:10:51,170 INFO L175 Difference]: Start difference. First operand has 452 places, 574 transitions, 6989 flow. Second operand 11 states and 256 transitions. [2024-06-20 18:10:51,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 596 transitions, 8325 flow [2024-06-20 18:10:59,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 596 transitions, 8074 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-20 18:10:59,529 INFO L231 Difference]: Finished difference. Result has 455 places, 576 transitions, 7019 flow [2024-06-20 18:10:59,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6738, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7019, PETRI_PLACES=455, PETRI_TRANSITIONS=576} [2024-06-20 18:10:59,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-20 18:10:59,530 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 576 transitions, 7019 flow [2024-06-20 18:10:59,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:59,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:10:59,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:10:59,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 18:10:59,530 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:10:59,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:10:59,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1195636044, now seen corresponding path program 13 times [2024-06-20 18:10:59,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:10:59,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793997701] [2024-06-20 18:10:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:10:59,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:10:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:10:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:10:59,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:10:59,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793997701] [2024-06-20 18:10:59,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793997701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:10:59,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:10:59,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:10:59,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462300231] [2024-06-20 18:10:59,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:10:59,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:10:59,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:10:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:10:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:10:59,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:10:59,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 576 transitions, 7019 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:10:59,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:10:59,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:10:59,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:11:01,143 INFO L124 PetriNetUnfolderBase]: 3175/5558 cut-off events. [2024-06-20 18:11:01,143 INFO L125 PetriNetUnfolderBase]: For 1070628/1070628 co-relation queries the response was YES. [2024-06-20 18:11:01,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42536 conditions, 5558 events. 3175/5558 cut-off events. For 1070628/1070628 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 39209 event pairs, 569 based on Foata normal form. 1/5547 useless extension candidates. Maximal degree in co-relation 42328. Up to 4595 conditions per place. [2024-06-20 18:11:01,243 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 415 selfloop transitions, 183 changer transitions 0/607 dead transitions. [2024-06-20 18:11:01,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 607 transitions, 8961 flow [2024-06-20 18:11:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:11:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:11:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-20 18:11:01,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790697674418605 [2024-06-20 18:11:01,244 INFO L175 Difference]: Start difference. First operand has 455 places, 576 transitions, 7019 flow. Second operand 10 states and 249 transitions. [2024-06-20 18:11:01,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 607 transitions, 8961 flow [2024-06-20 18:11:09,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 607 transitions, 8701 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-20 18:11:09,044 INFO L231 Difference]: Finished difference. Result has 457 places, 579 transitions, 7173 flow [2024-06-20 18:11:09,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7173, PETRI_PLACES=457, PETRI_TRANSITIONS=579} [2024-06-20 18:11:09,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-20 18:11:09,045 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 579 transitions, 7173 flow [2024-06-20 18:11:09,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:09,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:11:09,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:11:09,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 18:11:09,045 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:11:09,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:11:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1004060904, now seen corresponding path program 14 times [2024-06-20 18:11:09,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:11:09,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053251176] [2024-06-20 18:11:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:11:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:11:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:11:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:11:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:11:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053251176] [2024-06-20 18:11:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053251176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:11:09,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:11:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:11:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834552099] [2024-06-20 18:11:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:11:09,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:11:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:11:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:11:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:11:09,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:11:09,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 579 transitions, 7173 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:09,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:11:09,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:11:09,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:11:10,609 INFO L124 PetriNetUnfolderBase]: 3180/5560 cut-off events. [2024-06-20 18:11:10,609 INFO L125 PetriNetUnfolderBase]: For 1081163/1081163 co-relation queries the response was YES. [2024-06-20 18:11:10,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42701 conditions, 5560 events. 3180/5560 cut-off events. For 1081163/1081163 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 39305 event pairs, 582 based on Foata normal form. 1/5556 useless extension candidates. Maximal degree in co-relation 42492. Up to 4601 conditions per place. [2024-06-20 18:11:10,708 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 413 selfloop transitions, 180 changer transitions 0/602 dead transitions. [2024-06-20 18:11:10,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 602 transitions, 8781 flow [2024-06-20 18:11:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 18:11:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 18:11:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 285 transitions. [2024-06-20 18:11:10,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2024-06-20 18:11:10,710 INFO L175 Difference]: Start difference. First operand has 457 places, 579 transitions, 7173 flow. Second operand 12 states and 285 transitions. [2024-06-20 18:11:10,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 602 transitions, 8781 flow [2024-06-20 18:11:18,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 602 transitions, 8449 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 18:11:18,622 INFO L231 Difference]: Finished difference. Result has 461 places, 582 transitions, 7263 flow [2024-06-20 18:11:18,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6844, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7263, PETRI_PLACES=461, PETRI_TRANSITIONS=582} [2024-06-20 18:11:18,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-20 18:11:18,622 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 582 transitions, 7263 flow [2024-06-20 18:11:18,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:18,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:11:18,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:11:18,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 18:11:18,628 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:11:18,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:11:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2001482448, now seen corresponding path program 15 times [2024-06-20 18:11:18,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:11:18,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211815317] [2024-06-20 18:11:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:11:18,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:11:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:11:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:11:18,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:11:18,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211815317] [2024-06-20 18:11:18,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211815317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:11:18,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:11:18,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:11:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11444288] [2024-06-20 18:11:18,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:11:18,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:11:18,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:11:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:11:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:11:18,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:11:18,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 582 transitions, 7263 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:18,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:11:18,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:11:18,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:11:20,261 INFO L124 PetriNetUnfolderBase]: 3193/5583 cut-off events. [2024-06-20 18:11:20,261 INFO L125 PetriNetUnfolderBase]: For 1107903/1107903 co-relation queries the response was YES. [2024-06-20 18:11:20,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43104 conditions, 5583 events. 3193/5583 cut-off events. For 1107903/1107903 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39507 event pairs, 581 based on Foata normal form. 1/5579 useless extension candidates. Maximal degree in co-relation 42894. Up to 4616 conditions per place. [2024-06-20 18:11:20,362 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 415 selfloop transitions, 186 changer transitions 0/610 dead transitions. [2024-06-20 18:11:20,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 610 transitions, 9269 flow [2024-06-20 18:11:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 18:11:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 18:11:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 305 transitions. [2024-06-20 18:11:20,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456171735241503 [2024-06-20 18:11:20,363 INFO L175 Difference]: Start difference. First operand has 461 places, 582 transitions, 7263 flow. Second operand 13 states and 305 transitions. [2024-06-20 18:11:20,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 610 transitions, 9269 flow [2024-06-20 18:11:28,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 610 transitions, 8961 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 18:11:28,151 INFO L231 Difference]: Finished difference. Result has 465 places, 588 transitions, 7443 flow [2024-06-20 18:11:28,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6961, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7443, PETRI_PLACES=465, PETRI_TRANSITIONS=588} [2024-06-20 18:11:28,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 421 predicate places. [2024-06-20 18:11:28,152 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 588 transitions, 7443 flow [2024-06-20 18:11:28,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:28,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:11:28,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:11:28,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 18:11:28,153 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:11:28,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:11:28,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1395716104, now seen corresponding path program 16 times [2024-06-20 18:11:28,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:11:28,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734913036] [2024-06-20 18:11:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:11:28,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:11:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:11:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:11:28,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:11:28,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734913036] [2024-06-20 18:11:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734913036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:11:28,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:11:28,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:11:28,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251135511] [2024-06-20 18:11:28,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:11:28,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:11:28,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:11:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:11:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:11:28,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:11:28,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 588 transitions, 7443 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:28,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:11:28,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:11:28,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:11:29,794 INFO L124 PetriNetUnfolderBase]: 3190/5578 cut-off events. [2024-06-20 18:11:29,795 INFO L125 PetriNetUnfolderBase]: For 1108836/1108836 co-relation queries the response was YES. [2024-06-20 18:11:29,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43033 conditions, 5578 events. 3190/5578 cut-off events. For 1108836/1108836 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39460 event pairs, 582 based on Foata normal form. 1/5574 useless extension candidates. Maximal degree in co-relation 42822. Up to 4613 conditions per place. [2024-06-20 18:11:29,894 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 413 selfloop transitions, 185 changer transitions 0/607 dead transitions. [2024-06-20 18:11:29,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 607 transitions, 9331 flow [2024-06-20 18:11:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:11:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:11:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-20 18:11:29,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674418604651162 [2024-06-20 18:11:29,896 INFO L175 Difference]: Start difference. First operand has 465 places, 588 transitions, 7443 flow. Second operand 10 states and 244 transitions. [2024-06-20 18:11:29,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 607 transitions, 9331 flow [2024-06-20 18:11:38,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 607 transitions, 9005 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-20 18:11:38,041 INFO L231 Difference]: Finished difference. Result has 466 places, 588 transitions, 7493 flow [2024-06-20 18:11:38,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7117, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7493, PETRI_PLACES=466, PETRI_TRANSITIONS=588} [2024-06-20 18:11:38,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-20 18:11:38,041 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 588 transitions, 7493 flow [2024-06-20 18:11:38,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:38,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:11:38,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:11:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 18:11:38,042 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:11:38,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:11:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1396163434, now seen corresponding path program 17 times [2024-06-20 18:11:38,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:11:38,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777069037] [2024-06-20 18:11:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:11:38,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:11:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:11:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:11:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:11:38,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777069037] [2024-06-20 18:11:38,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777069037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:11:38,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:11:38,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:11:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241373504] [2024-06-20 18:11:38,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:11:38,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:11:38,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:11:38,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:11:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:11:38,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:11:38,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 588 transitions, 7493 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:38,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:11:38,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:11:38,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:11:39,781 INFO L124 PetriNetUnfolderBase]: 3187/5574 cut-off events. [2024-06-20 18:11:39,781 INFO L125 PetriNetUnfolderBase]: For 1109385/1109385 co-relation queries the response was YES. [2024-06-20 18:11:39,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42933 conditions, 5574 events. 3187/5574 cut-off events. For 1109385/1109385 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39402 event pairs, 582 based on Foata normal form. 1/5570 useless extension candidates. Maximal degree in co-relation 42721. Up to 4610 conditions per place. [2024-06-20 18:11:39,867 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 412 selfloop transitions, 185 changer transitions 0/606 dead transitions. [2024-06-20 18:11:39,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 606 transitions, 9055 flow [2024-06-20 18:11:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:11:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:11:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-20 18:11:39,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5651162790697675 [2024-06-20 18:11:39,869 INFO L175 Difference]: Start difference. First operand has 466 places, 588 transitions, 7493 flow. Second operand 10 states and 243 transitions. [2024-06-20 18:11:39,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 606 transitions, 9055 flow [2024-06-20 18:11:46,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 606 transitions, 8721 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 18:11:46,543 INFO L231 Difference]: Finished difference. Result has 469 places, 588 transitions, 7535 flow [2024-06-20 18:11:46,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7535, PETRI_PLACES=469, PETRI_TRANSITIONS=588} [2024-06-20 18:11:46,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-20 18:11:46,543 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 588 transitions, 7535 flow [2024-06-20 18:11:46,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:46,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:11:46,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:11:46,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 18:11:46,544 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:11:46,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:11:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1065325654, now seen corresponding path program 18 times [2024-06-20 18:11:46,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:11:46,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962313564] [2024-06-20 18:11:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:11:46,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:11:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:11:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:11:46,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:11:46,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962313564] [2024-06-20 18:11:46,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962313564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:11:46,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:11:46,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:11:46,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331990009] [2024-06-20 18:11:46,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:11:46,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:11:46,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:11:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:11:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:11:46,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:11:46,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 588 transitions, 7535 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:46,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:11:46,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:11:46,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:11:48,170 INFO L124 PetriNetUnfolderBase]: 3184/5574 cut-off events. [2024-06-20 18:11:48,171 INFO L125 PetriNetUnfolderBase]: For 1109702/1109702 co-relation queries the response was YES. [2024-06-20 18:11:48,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42763 conditions, 5574 events. 3184/5574 cut-off events. For 1109702/1109702 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39434 event pairs, 577 based on Foata normal form. 1/5570 useless extension candidates. Maximal degree in co-relation 42551. Up to 4607 conditions per place. [2024-06-20 18:11:48,258 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 407 selfloop transitions, 192 changer transitions 0/608 dead transitions. [2024-06-20 18:11:48,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 608 transitions, 9107 flow [2024-06-20 18:11:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 18:11:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 18:11:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-20 18:11:48,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-20 18:11:48,260 INFO L175 Difference]: Start difference. First operand has 469 places, 588 transitions, 7535 flow. Second operand 12 states and 280 transitions. [2024-06-20 18:11:48,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 608 transitions, 9107 flow [2024-06-20 18:11:56,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 608 transitions, 8635 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 18:11:56,134 INFO L231 Difference]: Finished difference. Result has 471 places, 588 transitions, 7453 flow [2024-06-20 18:11:56,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7063, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7453, PETRI_PLACES=471, PETRI_TRANSITIONS=588} [2024-06-20 18:11:56,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-20 18:11:56,134 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 588 transitions, 7453 flow [2024-06-20 18:11:56,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:56,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:11:56,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:11:56,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 18:11:56,135 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:11:56,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:11:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1018353656, now seen corresponding path program 19 times [2024-06-20 18:11:56,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:11:56,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724231189] [2024-06-20 18:11:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:11:56,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:11:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:11:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:11:56,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:11:56,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724231189] [2024-06-20 18:11:56,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724231189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:11:56,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:11:56,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:11:56,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533040569] [2024-06-20 18:11:56,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:11:56,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:11:56,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:11:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:11:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:11:56,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:11:56,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 588 transitions, 7453 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:11:56,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:11:56,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:11:56,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:11:57,775 INFO L124 PetriNetUnfolderBase]: 3181/5570 cut-off events. [2024-06-20 18:11:57,775 INFO L125 PetriNetUnfolderBase]: For 1107852/1107852 co-relation queries the response was YES. [2024-06-20 18:11:57,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42611 conditions, 5570 events. 3181/5570 cut-off events. For 1107852/1107852 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39444 event pairs, 577 based on Foata normal form. 1/5566 useless extension candidates. Maximal degree in co-relation 42398. Up to 4604 conditions per place. [2024-06-20 18:11:57,866 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 411 selfloop transitions, 193 changer transitions 0/613 dead transitions. [2024-06-20 18:11:57,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 613 transitions, 9047 flow [2024-06-20 18:11:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-20 18:11:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-20 18:11:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 382 transitions. [2024-06-20 18:11:57,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225718194254446 [2024-06-20 18:11:57,873 INFO L175 Difference]: Start difference. First operand has 471 places, 588 transitions, 7453 flow. Second operand 17 states and 382 transitions. [2024-06-20 18:11:57,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 613 transitions, 9047 flow [2024-06-20 18:12:06,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 613 transitions, 8539 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-20 18:12:06,367 INFO L231 Difference]: Finished difference. Result has 476 places, 588 transitions, 7337 flow [2024-06-20 18:12:06,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6945, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7337, PETRI_PLACES=476, PETRI_TRANSITIONS=588} [2024-06-20 18:12:06,368 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 432 predicate places. [2024-06-20 18:12:06,368 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 588 transitions, 7337 flow [2024-06-20 18:12:06,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:06,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:12:06,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:12:06,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 18:12:06,368 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:12:06,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:12:06,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1009782776, now seen corresponding path program 20 times [2024-06-20 18:12:06,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:12:06,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752247515] [2024-06-20 18:12:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:12:06,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:12:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:12:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:12:06,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:12:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752247515] [2024-06-20 18:12:06,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752247515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:12:06,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:12:06,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:12:06,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411821077] [2024-06-20 18:12:06,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:12:06,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:12:06,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:12:06,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:12:06,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:12:06,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:12:06,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 588 transitions, 7337 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:06,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:12:06,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:12:06,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:12:07,943 INFO L124 PetriNetUnfolderBase]: 3178/5562 cut-off events. [2024-06-20 18:12:07,943 INFO L125 PetriNetUnfolderBase]: For 1105871/1105871 co-relation queries the response was YES. [2024-06-20 18:12:08,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42398 conditions, 5562 events. 3178/5562 cut-off events. For 1105871/1105871 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39371 event pairs, 582 based on Foata normal form. 1/5558 useless extension candidates. Maximal degree in co-relation 42184. Up to 4601 conditions per place. [2024-06-20 18:12:08,038 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 405 selfloop transitions, 192 changer transitions 0/606 dead transitions. [2024-06-20 18:12:08,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 606 transitions, 8573 flow [2024-06-20 18:12:08,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:12:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:12:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-06-20 18:12:08,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496828752642706 [2024-06-20 18:12:08,039 INFO L175 Difference]: Start difference. First operand has 476 places, 588 transitions, 7337 flow. Second operand 11 states and 260 transitions. [2024-06-20 18:12:08,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 606 transitions, 8573 flow [2024-06-20 18:12:17,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 606 transitions, 7946 flow, removed 6 selfloop flow, removed 19 redundant places. [2024-06-20 18:12:17,084 INFO L231 Difference]: Finished difference. Result has 468 places, 588 transitions, 7100 flow [2024-06-20 18:12:17,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6710, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7100, PETRI_PLACES=468, PETRI_TRANSITIONS=588} [2024-06-20 18:12:17,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 424 predicate places. [2024-06-20 18:12:17,085 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 588 transitions, 7100 flow [2024-06-20 18:12:17,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:17,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:12:17,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:12:17,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 18:12:17,086 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:12:17,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:12:17,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1960281938, now seen corresponding path program 5 times [2024-06-20 18:12:17,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:12:17,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161703357] [2024-06-20 18:12:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:12:17,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:12:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:12:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:12:17,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:12:17,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161703357] [2024-06-20 18:12:17,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161703357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:12:17,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:12:17,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:12:17,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417634929] [2024-06-20 18:12:17,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:12:17,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:12:17,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:12:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:12:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:12:17,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:12:17,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 588 transitions, 7100 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:17,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:12:17,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:12:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:12:18,552 INFO L124 PetriNetUnfolderBase]: 3186/5581 cut-off events. [2024-06-20 18:12:18,553 INFO L125 PetriNetUnfolderBase]: For 1132389/1132389 co-relation queries the response was YES. [2024-06-20 18:12:18,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42525 conditions, 5581 events. 3186/5581 cut-off events. For 1132389/1132389 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 39479 event pairs, 569 based on Foata normal form. 2/5571 useless extension candidates. Maximal degree in co-relation 42311. Up to 4786 conditions per place. [2024-06-20 18:12:18,649 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 521 selfloop transitions, 77 changer transitions 0/608 dead transitions. [2024-06-20 18:12:18,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 608 transitions, 8428 flow [2024-06-20 18:12:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:12:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:12:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 18:12:18,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-20 18:12:18,650 INFO L175 Difference]: Start difference. First operand has 468 places, 588 transitions, 7100 flow. Second operand 7 states and 182 transitions. [2024-06-20 18:12:18,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 608 transitions, 8428 flow [2024-06-20 18:12:28,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 608 transitions, 8044 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 18:12:28,533 INFO L231 Difference]: Finished difference. Result has 465 places, 590 transitions, 6967 flow [2024-06-20 18:12:28,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6716, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6967, PETRI_PLACES=465, PETRI_TRANSITIONS=590} [2024-06-20 18:12:28,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 421 predicate places. [2024-06-20 18:12:28,533 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 590 transitions, 6967 flow [2024-06-20 18:12:28,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:28,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:12:28,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:12:28,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 18:12:28,534 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:12:28,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:12:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1788809994, now seen corresponding path program 6 times [2024-06-20 18:12:28,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:12:28,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883325934] [2024-06-20 18:12:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:12:28,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:12:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:12:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:12:28,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:12:28,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883325934] [2024-06-20 18:12:28,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883325934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:12:28,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:12:28,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:12:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342271655] [2024-06-20 18:12:28,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:12:28,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:12:28,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:12:28,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:12:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:12:28,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:12:28,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 590 transitions, 6967 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:28,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:12:28,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:12:28,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:12:30,056 INFO L124 PetriNetUnfolderBase]: 3194/5591 cut-off events. [2024-06-20 18:12:30,056 INFO L125 PetriNetUnfolderBase]: For 1147440/1147440 co-relation queries the response was YES. [2024-06-20 18:12:30,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42587 conditions, 5591 events. 3194/5591 cut-off events. For 1147440/1147440 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 39612 event pairs, 583 based on Foata normal form. 2/5588 useless extension candidates. Maximal degree in co-relation 42372. Up to 4798 conditions per place. [2024-06-20 18:12:30,156 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 520 selfloop transitions, 75 changer transitions 0/605 dead transitions. [2024-06-20 18:12:30,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 605 transitions, 8279 flow [2024-06-20 18:12:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:12:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:12:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 18:12:30,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2024-06-20 18:12:30,157 INFO L175 Difference]: Start difference. First operand has 465 places, 590 transitions, 6967 flow. Second operand 8 states and 199 transitions. [2024-06-20 18:12:30,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 605 transitions, 8279 flow [2024-06-20 18:12:39,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 605 transitions, 8044 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 18:12:39,200 INFO L231 Difference]: Finished difference. Result has 468 places, 592 transitions, 6983 flow [2024-06-20 18:12:39,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6732, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6983, PETRI_PLACES=468, PETRI_TRANSITIONS=592} [2024-06-20 18:12:39,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 424 predicate places. [2024-06-20 18:12:39,201 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 592 transitions, 6983 flow [2024-06-20 18:12:39,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:39,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:12:39,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:12:39,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 18:12:39,202 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:12:39,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:12:39,202 INFO L85 PathProgramCache]: Analyzing trace with hash -764144920, now seen corresponding path program 7 times [2024-06-20 18:12:39,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:12:39,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778684200] [2024-06-20 18:12:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:12:39,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:12:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:12:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:12:39,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:12:39,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778684200] [2024-06-20 18:12:39,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778684200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:12:39,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:12:39,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:12:39,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604991886] [2024-06-20 18:12:39,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:12:39,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:12:39,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:12:39,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:12:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:12:39,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:12:39,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 592 transitions, 6983 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:39,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:12:39,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:12:39,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:12:40,900 INFO L124 PetriNetUnfolderBase]: 3202/5607 cut-off events. [2024-06-20 18:12:40,900 INFO L125 PetriNetUnfolderBase]: For 1162094/1162094 co-relation queries the response was YES. [2024-06-20 18:12:40,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42784 conditions, 5607 events. 3202/5607 cut-off events. For 1162094/1162094 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 39754 event pairs, 583 based on Foata normal form. 2/5604 useless extension candidates. Maximal degree in co-relation 42568. Up to 4790 conditions per place. [2024-06-20 18:12:40,992 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 519 selfloop transitions, 80 changer transitions 0/609 dead transitions. [2024-06-20 18:12:40,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 609 transitions, 8311 flow [2024-06-20 18:12:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:12:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:12:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 18:12:40,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710594315245479 [2024-06-20 18:12:40,994 INFO L175 Difference]: Start difference. First operand has 468 places, 592 transitions, 6983 flow. Second operand 9 states and 221 transitions. [2024-06-20 18:12:40,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 609 transitions, 8311 flow [2024-06-20 18:12:49,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 609 transitions, 8076 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 18:12:49,464 INFO L231 Difference]: Finished difference. Result has 471 places, 594 transitions, 7013 flow [2024-06-20 18:12:49,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7013, PETRI_PLACES=471, PETRI_TRANSITIONS=594} [2024-06-20 18:12:49,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-20 18:12:49,464 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 594 transitions, 7013 flow [2024-06-20 18:12:49,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:49,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:12:49,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:12:49,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 18:12:49,465 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:12:49,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:12:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash -615096972, now seen corresponding path program 8 times [2024-06-20 18:12:49,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:12:49,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343704602] [2024-06-20 18:12:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:12:49,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:12:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:12:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:12:49,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:12:49,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343704602] [2024-06-20 18:12:49,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343704602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:12:49,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:12:49,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:12:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252963682] [2024-06-20 18:12:49,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:12:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:12:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:12:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:12:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:12:49,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:12:49,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 594 transitions, 7013 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:12:49,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:12:49,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:12:49,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:12:51,040 INFO L124 PetriNetUnfolderBase]: 3210/5623 cut-off events. [2024-06-20 18:12:51,041 INFO L125 PetriNetUnfolderBase]: For 1177195/1177195 co-relation queries the response was YES. [2024-06-20 18:12:51,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43012 conditions, 5623 events. 3210/5623 cut-off events. For 1177195/1177195 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 39848 event pairs, 569 based on Foata normal form. 2/5613 useless extension candidates. Maximal degree in co-relation 42795. Up to 4794 conditions per place. [2024-06-20 18:12:51,134 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 523 selfloop transitions, 84 changer transitions 0/617 dead transitions. [2024-06-20 18:12:51,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 617 transitions, 8439 flow [2024-06-20 18:12:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:12:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:12:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 18:12:51,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079734219269103 [2024-06-20 18:12:51,135 INFO L175 Difference]: Start difference. First operand has 471 places, 594 transitions, 7013 flow. Second operand 7 states and 183 transitions. [2024-06-20 18:12:51,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 617 transitions, 8439 flow [2024-06-20 18:13:00,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 617 transitions, 8190 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 18:13:00,389 INFO L231 Difference]: Finished difference. Result has 472 places, 598 transitions, 7122 flow [2024-06-20 18:13:00,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6764, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7122, PETRI_PLACES=472, PETRI_TRANSITIONS=598} [2024-06-20 18:13:00,390 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 428 predicate places. [2024-06-20 18:13:00,390 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 598 transitions, 7122 flow [2024-06-20 18:13:00,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:00,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:13:00,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:13:00,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 18:13:00,391 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:13:00,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:13:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1864705404, now seen corresponding path program 9 times [2024-06-20 18:13:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:13:00,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283116771] [2024-06-20 18:13:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:13:00,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:13:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:13:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:13:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:13:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283116771] [2024-06-20 18:13:00,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283116771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:13:00,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:13:00,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:13:00,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772279891] [2024-06-20 18:13:00,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:13:00,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:13:00,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:13:00,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:13:00,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:13:00,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:13:00,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 598 transitions, 7122 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:00,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:13:00,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:13:00,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:13:01,977 INFO L124 PetriNetUnfolderBase]: 3218/5634 cut-off events. [2024-06-20 18:13:01,978 INFO L125 PetriNetUnfolderBase]: For 1192075/1192075 co-relation queries the response was YES. [2024-06-20 18:13:02,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43267 conditions, 5634 events. 3218/5634 cut-off events. For 1192075/1192075 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 39963 event pairs, 581 based on Foata normal form. 2/5631 useless extension candidates. Maximal degree in co-relation 43048. Up to 4834 conditions per place. [2024-06-20 18:13:02,082 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 527 selfloop transitions, 78 changer transitions 0/615 dead transitions. [2024-06-20 18:13:02,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 615 transitions, 8470 flow [2024-06-20 18:13:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:13:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:13:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-20 18:13:02,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604651162790698 [2024-06-20 18:13:02,083 INFO L175 Difference]: Start difference. First operand has 472 places, 598 transitions, 7122 flow. Second operand 10 states and 241 transitions. [2024-06-20 18:13:02,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 615 transitions, 8470 flow [2024-06-20 18:13:11,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 615 transitions, 8230 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-20 18:13:11,800 INFO L231 Difference]: Finished difference. Result has 479 places, 600 transitions, 7151 flow [2024-06-20 18:13:11,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6882, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7151, PETRI_PLACES=479, PETRI_TRANSITIONS=600} [2024-06-20 18:13:11,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-20 18:13:11,800 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 600 transitions, 7151 flow [2024-06-20 18:13:11,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:11,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:13:11,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:13:11,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 18:13:11,801 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:13:11,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:13:11,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1165333224, now seen corresponding path program 10 times [2024-06-20 18:13:11,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:13:11,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675137209] [2024-06-20 18:13:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:13:11,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:13:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:13:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:13:12,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:13:12,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675137209] [2024-06-20 18:13:12,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675137209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:13:12,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:13:12,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:13:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401121852] [2024-06-20 18:13:12,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:13:12,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:13:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:13:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:13:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:13:12,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:13:12,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 600 transitions, 7151 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:12,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:13:12,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:13:12,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:13:13,355 INFO L124 PetriNetUnfolderBase]: 3226/5650 cut-off events. [2024-06-20 18:13:13,356 INFO L125 PetriNetUnfolderBase]: For 1205362/1205362 co-relation queries the response was YES. [2024-06-20 18:13:13,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43532 conditions, 5650 events. 3226/5650 cut-off events. For 1205362/1205362 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 40144 event pairs, 583 based on Foata normal form. 2/5647 useless extension candidates. Maximal degree in co-relation 43311. Up to 4846 conditions per place. [2024-06-20 18:13:13,455 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 528 selfloop transitions, 77 changer transitions 0/615 dead transitions. [2024-06-20 18:13:13,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 615 transitions, 8499 flow [2024-06-20 18:13:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:13:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:13:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 18:13:13,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-20 18:13:13,457 INFO L175 Difference]: Start difference. First operand has 479 places, 600 transitions, 7151 flow. Second operand 8 states and 198 transitions. [2024-06-20 18:13:13,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 615 transitions, 8499 flow [2024-06-20 18:13:23,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 615 transitions, 8246 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-20 18:13:23,855 INFO L231 Difference]: Finished difference. Result has 479 places, 602 transitions, 7169 flow [2024-06-20 18:13:23,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6898, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7169, PETRI_PLACES=479, PETRI_TRANSITIONS=602} [2024-06-20 18:13:23,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-20 18:13:23,856 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 602 transitions, 7169 flow [2024-06-20 18:13:23,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:23,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:13:23,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:13:23,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 18:13:23,857 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:13:23,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:13:23,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1001202968, now seen corresponding path program 11 times [2024-06-20 18:13:23,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:13:23,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800280460] [2024-06-20 18:13:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:13:23,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:13:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:13:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:13:24,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:13:24,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800280460] [2024-06-20 18:13:24,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800280460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:13:24,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:13:24,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:13:24,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617473782] [2024-06-20 18:13:24,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:13:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:13:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:13:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:13:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:13:24,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:13:24,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 602 transitions, 7169 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:24,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:13:24,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:13:24,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:13:25,418 INFO L124 PetriNetUnfolderBase]: 3234/5666 cut-off events. [2024-06-20 18:13:25,419 INFO L125 PetriNetUnfolderBase]: For 1220653/1220653 co-relation queries the response was YES. [2024-06-20 18:13:25,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43728 conditions, 5666 events. 3234/5666 cut-off events. For 1220653/1220653 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 40296 event pairs, 583 based on Foata normal form. 2/5663 useless extension candidates. Maximal degree in co-relation 43506. Up to 4832 conditions per place. [2024-06-20 18:13:25,518 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 525 selfloop transitions, 85 changer transitions 0/620 dead transitions. [2024-06-20 18:13:25,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 620 transitions, 8537 flow [2024-06-20 18:13:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:13:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:13:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-20 18:13:25,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-20 18:13:25,520 INFO L175 Difference]: Start difference. First operand has 479 places, 602 transitions, 7169 flow. Second operand 10 states and 242 transitions. [2024-06-20 18:13:25,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 620 transitions, 8537 flow [2024-06-20 18:13:36,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 620 transitions, 8282 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 18:13:36,224 INFO L231 Difference]: Finished difference. Result has 483 places, 604 transitions, 7205 flow [2024-06-20 18:13:36,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7205, PETRI_PLACES=483, PETRI_TRANSITIONS=604} [2024-06-20 18:13:36,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 439 predicate places. [2024-06-20 18:13:36,225 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 604 transitions, 7205 flow [2024-06-20 18:13:36,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:36,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:13:36,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:13:36,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 18:13:36,226 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:13:36,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:13:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1175808744, now seen corresponding path program 12 times [2024-06-20 18:13:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:13:36,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916242511] [2024-06-20 18:13:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:13:36,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:13:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:13:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:13:36,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:13:36,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916242511] [2024-06-20 18:13:36,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916242511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:13:36,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:13:36,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:13:36,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455779744] [2024-06-20 18:13:36,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:13:36,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:13:36,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:13:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:13:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:13:36,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:13:36,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 604 transitions, 7205 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:36,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:13:36,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:13:36,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:13:38,117 INFO L124 PetriNetUnfolderBase]: 3242/5680 cut-off events. [2024-06-20 18:13:38,118 INFO L125 PetriNetUnfolderBase]: For 1236309/1236309 co-relation queries the response was YES. [2024-06-20 18:13:38,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43962 conditions, 5680 events. 3242/5680 cut-off events. For 1236309/1236309 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 40418 event pairs, 583 based on Foata normal form. 2/5677 useless extension candidates. Maximal degree in co-relation 43739. Up to 4838 conditions per place. [2024-06-20 18:13:38,221 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 526 selfloop transitions, 86 changer transitions 0/622 dead transitions. [2024-06-20 18:13:38,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 622 transitions, 8651 flow [2024-06-20 18:13:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:13:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:13:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 18:13:38,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2024-06-20 18:13:38,223 INFO L175 Difference]: Start difference. First operand has 483 places, 604 transitions, 7205 flow. Second operand 8 states and 199 transitions. [2024-06-20 18:13:38,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 622 transitions, 8651 flow [2024-06-20 18:13:48,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 622 transitions, 8376 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-20 18:13:48,509 INFO L231 Difference]: Finished difference. Result has 484 places, 608 transitions, 7318 flow [2024-06-20 18:13:48,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7318, PETRI_PLACES=484, PETRI_TRANSITIONS=608} [2024-06-20 18:13:48,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-20 18:13:48,510 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 608 transitions, 7318 flow [2024-06-20 18:13:48,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:48,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:13:48,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:13:48,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 18:13:48,510 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:13:48,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:13:48,510 INFO L85 PathProgramCache]: Analyzing trace with hash 469170920, now seen corresponding path program 13 times [2024-06-20 18:13:48,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:13:48,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663220431] [2024-06-20 18:13:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:13:48,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:13:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:13:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:13:48,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:13:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663220431] [2024-06-20 18:13:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663220431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:13:48,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:13:48,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:13:48,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94672554] [2024-06-20 18:13:48,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:13:48,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:13:48,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:13:48,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:13:48,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:13:48,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:13:48,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 608 transitions, 7318 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:13:48,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:13:48,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:13:48,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:13:50,052 INFO L124 PetriNetUnfolderBase]: 3250/5700 cut-off events. [2024-06-20 18:13:50,052 INFO L125 PetriNetUnfolderBase]: For 1251870/1251870 co-relation queries the response was YES. [2024-06-20 18:13:50,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44219 conditions, 5700 events. 3250/5700 cut-off events. For 1251870/1251870 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 40662 event pairs, 564 based on Foata normal form. 2/5697 useless extension candidates. Maximal degree in co-relation 43994. Up to 4733 conditions per place. [2024-06-20 18:13:50,153 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 510 selfloop transitions, 110 changer transitions 0/630 dead transitions. [2024-06-20 18:13:50,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 630 transitions, 9194 flow [2024-06-20 18:13:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:13:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:13:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-20 18:13:50,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762273901808785 [2024-06-20 18:13:50,154 INFO L175 Difference]: Start difference. First operand has 484 places, 608 transitions, 7318 flow. Second operand 9 states and 223 transitions. [2024-06-20 18:13:50,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 630 transitions, 9194 flow [2024-06-20 18:14:00,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 630 transitions, 8932 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-20 18:14:00,006 INFO L231 Difference]: Finished difference. Result has 490 places, 613 transitions, 7549 flow [2024-06-20 18:14:00,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7056, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7549, PETRI_PLACES=490, PETRI_TRANSITIONS=613} [2024-06-20 18:14:00,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 446 predicate places. [2024-06-20 18:14:00,007 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 613 transitions, 7549 flow [2024-06-20 18:14:00,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:00,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:14:00,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:14:00,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 18:14:00,008 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:14:00,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:14:00,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1663071084, now seen corresponding path program 14 times [2024-06-20 18:14:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:14:00,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226392649] [2024-06-20 18:14:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:14:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:14:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:14:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:14:00,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:14:00,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226392649] [2024-06-20 18:14:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226392649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:14:00,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:14:00,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:14:00,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110890372] [2024-06-20 18:14:00,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:14:00,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:14:00,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:14:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:14:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:14:00,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-20 18:14:00,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 613 transitions, 7549 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:00,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:14:00,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-20 18:14:00,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:14:01,555 INFO L124 PetriNetUnfolderBase]: 3245/5697 cut-off events. [2024-06-20 18:14:01,556 INFO L125 PetriNetUnfolderBase]: For 1231154/1231154 co-relation queries the response was YES. [2024-06-20 18:14:01,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43912 conditions, 5697 events. 3245/5697 cut-off events. For 1231154/1231154 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 40657 event pairs, 566 based on Foata normal form. 2/5694 useless extension candidates. Maximal degree in co-relation 43684. Up to 4729 conditions per place. [2024-06-20 18:14:01,657 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 511 selfloop transitions, 109 changer transitions 0/630 dead transitions. [2024-06-20 18:14:01,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 630 transitions, 8894 flow [2024-06-20 18:14:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:14:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:14:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 18:14:01,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-20 18:14:01,658 INFO L175 Difference]: Start difference. First operand has 490 places, 613 transitions, 7549 flow. Second operand 9 states and 222 transitions. [2024-06-20 18:14:01,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 630 transitions, 8894 flow [2024-06-20 18:14:11,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 630 transitions, 8352 flow, removed 143 selfloop flow, removed 7 redundant places. [2024-06-20 18:14:11,934 INFO L231 Difference]: Finished difference. Result has 492 places, 614 transitions, 7299 flow [2024-06-20 18:14:11,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7065, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7299, PETRI_PLACES=492, PETRI_TRANSITIONS=614} [2024-06-20 18:14:11,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 448 predicate places. [2024-06-20 18:14:11,935 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 614 transitions, 7299 flow [2024-06-20 18:14:11,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:11,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:14:11,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:14:11,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 18:14:11,935 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:14:11,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:14:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1414143514, now seen corresponding path program 1 times [2024-06-20 18:14:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:14:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054144441] [2024-06-20 18:14:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:14:11,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:14:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:14:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:14:12,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:14:12,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054144441] [2024-06-20 18:14:12,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054144441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:14:12,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:14:12,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:14:12,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829950989] [2024-06-20 18:14:12,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:14:12,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:14:12,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:14:12,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:14:12,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:14:12,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:14:12,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 614 transitions, 7299 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:12,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:14:12,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:14:12,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:14:14,068 INFO L124 PetriNetUnfolderBase]: 3393/5947 cut-off events. [2024-06-20 18:14:14,069 INFO L125 PetriNetUnfolderBase]: For 1659617/1659617 co-relation queries the response was YES. [2024-06-20 18:14:14,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48535 conditions, 5947 events. 3393/5947 cut-off events. For 1659617/1659617 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 42534 event pairs, 531 based on Foata normal form. 12/5958 useless extension candidates. Maximal degree in co-relation 48306. Up to 4814 conditions per place. [2024-06-20 18:14:14,172 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 588 selfloop transitions, 55 changer transitions 0/652 dead transitions. [2024-06-20 18:14:14,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 652 transitions, 9271 flow [2024-06-20 18:14:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:14:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:14:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 18:14:14,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-20 18:14:14,174 INFO L175 Difference]: Start difference. First operand has 492 places, 614 transitions, 7299 flow. Second operand 8 states and 206 transitions. [2024-06-20 18:14:14,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 652 transitions, 9271 flow [2024-06-20 18:14:22,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 652 transitions, 9078 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 18:14:22,608 INFO L231 Difference]: Finished difference. Result has 495 places, 621 transitions, 7460 flow [2024-06-20 18:14:22,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7108, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7460, PETRI_PLACES=495, PETRI_TRANSITIONS=621} [2024-06-20 18:14:22,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-20 18:14:22,609 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 621 transitions, 7460 flow [2024-06-20 18:14:22,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:22,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:14:22,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:14:22,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 18:14:22,609 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:14:22,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:14:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash -55482806, now seen corresponding path program 2 times [2024-06-20 18:14:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:14:22,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878160298] [2024-06-20 18:14:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:14:22,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:14:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:14:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:14:22,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:14:22,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878160298] [2024-06-20 18:14:22,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878160298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:14:22,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:14:22,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:14:22,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81387828] [2024-06-20 18:14:22,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:14:22,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:14:22,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:14:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:14:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:14:22,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:14:22,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 621 transitions, 7460 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:22,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:14:22,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:14:22,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:14:24,701 INFO L124 PetriNetUnfolderBase]: 3479/6083 cut-off events. [2024-06-20 18:14:24,701 INFO L125 PetriNetUnfolderBase]: For 1824320/1824320 co-relation queries the response was YES. [2024-06-20 18:14:24,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51941 conditions, 6083 events. 3479/6083 cut-off events. For 1824320/1824320 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 43450 event pairs, 606 based on Foata normal form. 12/6094 useless extension candidates. Maximal degree in co-relation 51710. Up to 5125 conditions per place. [2024-06-20 18:14:24,881 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 591 selfloop transitions, 51 changer transitions 0/651 dead transitions. [2024-06-20 18:14:24,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 651 transitions, 9400 flow [2024-06-20 18:14:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:14:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:14:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 18:14:24,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-06-20 18:14:24,882 INFO L175 Difference]: Start difference. First operand has 495 places, 621 transitions, 7460 flow. Second operand 8 states and 203 transitions. [2024-06-20 18:14:24,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 651 transitions, 9400 flow [2024-06-20 18:14:32,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 651 transitions, 9242 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-20 18:14:32,620 INFO L231 Difference]: Finished difference. Result has 499 places, 625 transitions, 7627 flow [2024-06-20 18:14:32,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7314, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7627, PETRI_PLACES=499, PETRI_TRANSITIONS=625} [2024-06-20 18:14:32,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 455 predicate places. [2024-06-20 18:14:32,621 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 625 transitions, 7627 flow [2024-06-20 18:14:32,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:32,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:14:32,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:14:32,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-20 18:14:32,622 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:14:32,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:14:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1658242392, now seen corresponding path program 3 times [2024-06-20 18:14:32,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:14:32,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895709076] [2024-06-20 18:14:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:14:32,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:14:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:14:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:14:32,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:14:32,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895709076] [2024-06-20 18:14:32,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895709076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:14:32,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:14:32,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:14:32,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113359376] [2024-06-20 18:14:32,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:14:32,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:14:32,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:14:32,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:14:32,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:14:33,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:14:33,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 625 transitions, 7627 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:33,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:14:33,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:14:33,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:14:34,658 INFO L124 PetriNetUnfolderBase]: 3443/6031 cut-off events. [2024-06-20 18:14:34,658 INFO L125 PetriNetUnfolderBase]: For 1640273/1640273 co-relation queries the response was YES. [2024-06-20 18:14:34,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48161 conditions, 6031 events. 3443/6031 cut-off events. For 1640273/1640273 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 43178 event pairs, 602 based on Foata normal form. 16/6046 useless extension candidates. Maximal degree in co-relation 47928. Up to 5169 conditions per place. [2024-06-20 18:14:34,756 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 590 selfloop transitions, 48 changer transitions 0/647 dead transitions. [2024-06-20 18:14:34,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 647 transitions, 8973 flow [2024-06-20 18:14:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:14:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:14:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 18:14:34,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-20 18:14:34,758 INFO L175 Difference]: Start difference. First operand has 499 places, 625 transitions, 7627 flow. Second operand 8 states and 200 transitions. [2024-06-20 18:14:34,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 647 transitions, 8973 flow [2024-06-20 18:14:43,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 647 transitions, 8755 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-20 18:14:43,928 INFO L231 Difference]: Finished difference. Result has 503 places, 625 transitions, 7515 flow [2024-06-20 18:14:43,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7409, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7515, PETRI_PLACES=503, PETRI_TRANSITIONS=625} [2024-06-20 18:14:43,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 459 predicate places. [2024-06-20 18:14:43,929 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 625 transitions, 7515 flow [2024-06-20 18:14:43,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:43,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:14:43,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:14:43,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-20 18:14:43,929 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:14:43,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:14:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash 490388170, now seen corresponding path program 4 times [2024-06-20 18:14:43,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:14:43,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884915042] [2024-06-20 18:14:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:14:43,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:14:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:14:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:14:44,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:14:44,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884915042] [2024-06-20 18:14:44,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884915042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:14:44,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:14:44,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:14:44,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483401362] [2024-06-20 18:14:44,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:14:44,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:14:44,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:14:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:14:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:14:44,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:14:44,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 625 transitions, 7515 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:44,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:14:44,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:14:44,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:14:46,038 INFO L124 PetriNetUnfolderBase]: 3499/6116 cut-off events. [2024-06-20 18:14:46,038 INFO L125 PetriNetUnfolderBase]: For 1653598/1653598 co-relation queries the response was YES. [2024-06-20 18:14:46,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48378 conditions, 6116 events. 3499/6116 cut-off events. For 1653598/1653598 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 43835 event pairs, 628 based on Foata normal form. 16/6125 useless extension candidates. Maximal degree in co-relation 48143. Up to 5036 conditions per place. [2024-06-20 18:14:46,140 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 462 selfloop transitions, 180 changer transitions 0/651 dead transitions. [2024-06-20 18:14:46,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 651 transitions, 8981 flow [2024-06-20 18:14:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:14:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:14:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-20 18:14:46,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744186046511628 [2024-06-20 18:14:46,142 INFO L175 Difference]: Start difference. First operand has 503 places, 625 transitions, 7515 flow. Second operand 10 states and 247 transitions. [2024-06-20 18:14:46,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 651 transitions, 8981 flow [2024-06-20 18:14:55,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 651 transitions, 8877 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 18:14:55,744 INFO L231 Difference]: Finished difference. Result has 506 places, 627 transitions, 7889 flow [2024-06-20 18:14:55,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7411, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7889, PETRI_PLACES=506, PETRI_TRANSITIONS=627} [2024-06-20 18:14:55,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 462 predicate places. [2024-06-20 18:14:55,744 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 627 transitions, 7889 flow [2024-06-20 18:14:55,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:55,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:14:55,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:14:55,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-20 18:14:55,745 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:14:55,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:14:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1046591048, now seen corresponding path program 5 times [2024-06-20 18:14:55,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:14:55,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330263521] [2024-06-20 18:14:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:14:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:14:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:14:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:14:56,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:14:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330263521] [2024-06-20 18:14:56,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330263521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:14:56,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:14:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:14:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631836310] [2024-06-20 18:14:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:14:56,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:14:56,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:14:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:14:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:14:56,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:14:56,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 627 transitions, 7889 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:14:56,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:14:56,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:14:56,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:14:57,992 INFO L124 PetriNetUnfolderBase]: 3631/6326 cut-off events. [2024-06-20 18:14:57,992 INFO L125 PetriNetUnfolderBase]: For 1890782/1890782 co-relation queries the response was YES. [2024-06-20 18:14:58,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54226 conditions, 6326 events. 3631/6326 cut-off events. For 1890782/1890782 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45405 event pairs, 650 based on Foata normal form. 12/6331 useless extension candidates. Maximal degree in co-relation 53990. Up to 5080 conditions per place. [2024-06-20 18:14:58,102 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 464 selfloop transitions, 186 changer transitions 0/659 dead transitions. [2024-06-20 18:14:58,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 659 transitions, 9865 flow [2024-06-20 18:14:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:14:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:14:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-20 18:14:58,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-20 18:14:58,103 INFO L175 Difference]: Start difference. First operand has 506 places, 627 transitions, 7889 flow. Second operand 10 states and 250 transitions. [2024-06-20 18:14:58,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 659 transitions, 9865 flow [2024-06-20 18:15:08,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 659 transitions, 9413 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:08,087 INFO L231 Difference]: Finished difference. Result has 508 places, 631 transitions, 8042 flow [2024-06-20 18:15:08,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7437, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8042, PETRI_PLACES=508, PETRI_TRANSITIONS=631} [2024-06-20 18:15:08,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 464 predicate places. [2024-06-20 18:15:08,087 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 631 transitions, 8042 flow [2024-06-20 18:15:08,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:08,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:08,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:08,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-20 18:15:08,088 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:15:08,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash -866907482, now seen corresponding path program 6 times [2024-06-20 18:15:08,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:08,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56433025] [2024-06-20 18:15:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:08,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:08,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:08,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56433025] [2024-06-20 18:15:08,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56433025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:08,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:08,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:08,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031407199] [2024-06-20 18:15:08,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:08,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:08,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:08,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:08,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:08,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:15:08,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 631 transitions, 8042 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:08,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:08,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:15:08,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:10,285 INFO L124 PetriNetUnfolderBase]: 3595/6276 cut-off events. [2024-06-20 18:15:10,285 INFO L125 PetriNetUnfolderBase]: For 1701373/1701373 co-relation queries the response was YES. [2024-06-20 18:15:10,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50224 conditions, 6276 events. 3595/6276 cut-off events. For 1701373/1701373 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45137 event pairs, 648 based on Foata normal form. 16/6285 useless extension candidates. Maximal degree in co-relation 49987. Up to 5188 conditions per place. [2024-06-20 18:15:10,406 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 462 selfloop transitions, 185 changer transitions 0/656 dead transitions. [2024-06-20 18:15:10,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 656 transitions, 9412 flow [2024-06-20 18:15:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-06-20 18:15:10,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602536997885835 [2024-06-20 18:15:10,408 INFO L175 Difference]: Start difference. First operand has 508 places, 631 transitions, 8042 flow. Second operand 11 states and 265 transitions. [2024-06-20 18:15:10,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 656 transitions, 9412 flow [2024-06-20 18:15:19,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 656 transitions, 8860 flow, removed 99 selfloop flow, removed 7 redundant places. [2024-06-20 18:15:19,939 INFO L231 Difference]: Finished difference. Result has 512 places, 631 transitions, 7866 flow [2024-06-20 18:15:19,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7490, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7866, PETRI_PLACES=512, PETRI_TRANSITIONS=631} [2024-06-20 18:15:19,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 468 predicate places. [2024-06-20 18:15:19,940 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 631 transitions, 7866 flow [2024-06-20 18:15:19,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:19,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:19,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-20 18:15:19,941 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:15:19,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash -858329658, now seen corresponding path program 1 times [2024-06-20 18:15:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562843452] [2024-06-20 18:15:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:20,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:20,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562843452] [2024-06-20 18:15:20,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562843452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:20,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:20,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:20,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731020297] [2024-06-20 18:15:20,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:20,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:20,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:20,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:15:20,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 631 transitions, 7866 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:20,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:20,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:15:20,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:22,140 INFO L124 PetriNetUnfolderBase]: 3681/6412 cut-off events. [2024-06-20 18:15:22,141 INFO L125 PetriNetUnfolderBase]: For 1782512/1782512 co-relation queries the response was YES. [2024-06-20 18:15:22,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52310 conditions, 6412 events. 3681/6412 cut-off events. For 1782512/1782512 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 46099 event pairs, 656 based on Foata normal form. 12/6417 useless extension candidates. Maximal degree in co-relation 52072. Up to 5070 conditions per place. [2024-06-20 18:15:22,256 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 457 selfloop transitions, 197 changer transitions 0/663 dead transitions. [2024-06-20 18:15:22,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 663 transitions, 9818 flow [2024-06-20 18:15:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2024-06-20 18:15:22,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665961945031712 [2024-06-20 18:15:22,257 INFO L175 Difference]: Start difference. First operand has 512 places, 631 transitions, 7866 flow. Second operand 11 states and 268 transitions. [2024-06-20 18:15:22,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 663 transitions, 9818 flow [2024-06-20 18:15:32,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 663 transitions, 9432 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 18:15:33,004 INFO L231 Difference]: Finished difference. Result has 513 places, 634 transitions, 8068 flow [2024-06-20 18:15:33,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7480, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8068, PETRI_PLACES=513, PETRI_TRANSITIONS=634} [2024-06-20 18:15:33,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 469 predicate places. [2024-06-20 18:15:33,005 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 634 transitions, 8068 flow [2024-06-20 18:15:33,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:33,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:33,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-20 18:15:33,007 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:15:33,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1284191770, now seen corresponding path program 7 times [2024-06-20 18:15:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:33,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959327238] [2024-06-20 18:15:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:33,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:33,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:33,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959327238] [2024-06-20 18:15:33,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959327238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:33,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:33,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:33,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654926977] [2024-06-20 18:15:33,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:33,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:33,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:33,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:33,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:33,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:15:33,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 634 transitions, 8068 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:33,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:33,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:15:33,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:35,340 INFO L124 PetriNetUnfolderBase]: 3737/6499 cut-off events. [2024-06-20 18:15:35,340 INFO L125 PetriNetUnfolderBase]: For 1885025/1885025 co-relation queries the response was YES. [2024-06-20 18:15:35,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53693 conditions, 6499 events. 3737/6499 cut-off events. For 1885025/1885025 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 46867 event pairs, 701 based on Foata normal form. 16/6510 useless extension candidates. Maximal degree in co-relation 53454. Up to 5410 conditions per place. [2024-06-20 18:15:35,459 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 462 selfloop transitions, 188 changer transitions 0/659 dead transitions. [2024-06-20 18:15:35,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 659 transitions, 9556 flow [2024-06-20 18:15:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 18:15:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 18:15:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 287 transitions. [2024-06-20 18:15:35,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562015503875969 [2024-06-20 18:15:35,460 INFO L175 Difference]: Start difference. First operand has 513 places, 634 transitions, 8068 flow. Second operand 12 states and 287 transitions. [2024-06-20 18:15:35,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 659 transitions, 9556 flow [2024-06-20 18:15:46,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 659 transitions, 9214 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 18:15:47,004 INFO L231 Difference]: Finished difference. Result has 518 places, 636 transitions, 8230 flow [2024-06-20 18:15:47,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8230, PETRI_PLACES=518, PETRI_TRANSITIONS=636} [2024-06-20 18:15:47,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 474 predicate places. [2024-06-20 18:15:47,005 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 636 transitions, 8230 flow [2024-06-20 18:15:47,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:47,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:47,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:47,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-20 18:15:47,006 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:15:47,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1410964136, now seen corresponding path program 8 times [2024-06-20 18:15:47,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:47,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554524758] [2024-06-20 18:15:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:47,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:47,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:47,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554524758] [2024-06-20 18:15:47,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554524758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:47,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:47,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342539834] [2024-06-20 18:15:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:47,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:47,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:47,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:15:47,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 636 transitions, 8230 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:47,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:47,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:15:47,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:49,306 INFO L124 PetriNetUnfolderBase]: 3793/6591 cut-off events. [2024-06-20 18:15:49,307 INFO L125 PetriNetUnfolderBase]: For 1908394/1908394 co-relation queries the response was YES. [2024-06-20 18:15:49,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54709 conditions, 6591 events. 3793/6591 cut-off events. For 1908394/1908394 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 47658 event pairs, 711 based on Foata normal form. 16/6602 useless extension candidates. Maximal degree in co-relation 54468. Up to 5498 conditions per place. [2024-06-20 18:15:49,424 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 463 selfloop transitions, 187 changer transitions 0/659 dead transitions. [2024-06-20 18:15:49,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 659 transitions, 9718 flow [2024-06-20 18:15:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-20 18:15:49,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-20 18:15:49,425 INFO L175 Difference]: Start difference. First operand has 518 places, 636 transitions, 8230 flow. Second operand 10 states and 245 transitions. [2024-06-20 18:15:49,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 659 transitions, 9718 flow [2024-06-20 18:16:01,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 659 transitions, 9240 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-06-20 18:16:01,411 INFO L231 Difference]: Finished difference. Result has 518 places, 638 transitions, 8258 flow [2024-06-20 18:16:01,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7752, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8258, PETRI_PLACES=518, PETRI_TRANSITIONS=638} [2024-06-20 18:16:01,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 474 predicate places. [2024-06-20 18:16:01,411 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 638 transitions, 8258 flow [2024-06-20 18:16:01,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:01,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:16:01,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:16:01,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-20 18:16:01,412 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:16:01,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:16:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1406202536, now seen corresponding path program 9 times [2024-06-20 18:16:01,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:16:01,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223573894] [2024-06-20 18:16:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:16:01,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:16:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:16:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:16:01,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:16:01,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223573894] [2024-06-20 18:16:01,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223573894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:16:01,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:16:01,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:16:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689984950] [2024-06-20 18:16:01,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:16:01,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:16:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:16:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:16:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:16:01,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:16:01,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 638 transitions, 8258 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:01,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:16:01,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:16:01,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:16:03,860 INFO L124 PetriNetUnfolderBase]: 3912/6778 cut-off events. [2024-06-20 18:16:03,861 INFO L125 PetriNetUnfolderBase]: For 2115443/2115443 co-relation queries the response was YES. [2024-06-20 18:16:03,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59181 conditions, 6778 events. 3912/6778 cut-off events. For 2115443/2115443 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 49016 event pairs, 730 based on Foata normal form. 12/6785 useless extension candidates. Maximal degree in co-relation 58939. Up to 5459 conditions per place. [2024-06-20 18:16:03,983 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 463 selfloop transitions, 195 changer transitions 0/667 dead transitions. [2024-06-20 18:16:03,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 667 transitions, 10280 flow [2024-06-20 18:16:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:16:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:16:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-20 18:16:03,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767441860465117 [2024-06-20 18:16:03,984 INFO L175 Difference]: Start difference. First operand has 518 places, 638 transitions, 8258 flow. Second operand 10 states and 248 transitions. [2024-06-20 18:16:03,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 667 transitions, 10280 flow [2024-06-20 18:16:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 667 transitions, 9800 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-20 18:16:17,241 INFO L231 Difference]: Finished difference. Result has 520 places, 642 transitions, 8429 flow [2024-06-20 18:16:17,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7778, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8429, PETRI_PLACES=520, PETRI_TRANSITIONS=642} [2024-06-20 18:16:17,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 476 predicate places. [2024-06-20 18:16:17,242 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 642 transitions, 8429 flow [2024-06-20 18:16:17,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:17,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:16:17,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:16:17,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-20 18:16:17,243 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 18:16:17,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:16:17,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1822473908, now seen corresponding path program 10 times [2024-06-20 18:16:17,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:16:17,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858384099] [2024-06-20 18:16:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:16:17,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:16:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:16:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:16:17,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:16:17,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858384099] [2024-06-20 18:16:17,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858384099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:16:17,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:16:17,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:16:17,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496605878] [2024-06-20 18:16:17,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:16:17,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:16:17,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:16:17,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:16:17,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:16:17,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 18:16:17,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 642 transitions, 8429 flow. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:17,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:16:17,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 18:16:17,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:16:19,541 INFO L124 PetriNetUnfolderBase]: 3876/6728 cut-off events. [2024-06-20 18:16:19,542 INFO L125 PetriNetUnfolderBase]: For 1913691/1913691 co-relation queries the response was YES. Killed by 15