./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 cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/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-cde23df-m [2024-06-14 14:07:19,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:07:19,887 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:07:19,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:07:19,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:07:19,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:07:19,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:07:19,932 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:07:19,932 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:07:19,933 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:07:19,933 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:07:19,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:07:19,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:07:19,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:07:19,936 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:07:19,937 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:07:19,937 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:07:19,939 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:07:19,939 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:07:19,939 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:07:19,940 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:07:19,942 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:07:19,942 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:07:19,942 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:07:19,943 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:07:19,943 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:07:19,943 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:07:19,943 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:07:19,943 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:07:19,944 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:07:19,944 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:07:19,944 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:07:19,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:07:19,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:07:19,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:07:19,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:07:19,946 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:07:19,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:07:19,946 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:07:19,946 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:07:19,947 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:07:19,947 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:07:19,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:07:19,947 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:07:20,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:07:20,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:07:20,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:07:20,211 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:07:20,216 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:07:20,218 INFO L431 ainManager$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 [2024-06-14 14:07:21,265 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:07:21,433 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:07:21,434 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 [2024-06-14 14:07:21,453 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553b7bbd2/e73864cc022e4ce881732b480e3db349/FLAG7d26ad7d3 [2024-06-14 14:07:21,465 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553b7bbd2/e73864cc022e4ce881732b480e3db349 [2024-06-14 14:07:21,467 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:07:21,467 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:07:21,467 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 14:07:21,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:07:21,575 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:07:21,576 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:07:21,576 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:07:21,595 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:07:21,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:07:21" (1/2) ... [2024-06-14 14:07:21,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afab71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:07:21, skipping insertion in model container [2024-06-14 14:07:21,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:07:21" (1/2) ... [2024-06-14 14:07:21,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@776769d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:07:21, skipping insertion in model container [2024-06-14 14:07:21,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:07:21" (2/2) ... [2024-06-14 14:07:21,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afab71c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:21, skipping insertion in model container [2024-06-14 14:07:21,598 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:07:21" (2/2) ... [2024-06-14 14:07:21,598 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:07:21,650 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:07:21,651 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$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 127) && __unbuffered_p2_EAX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:07:21,651 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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))) [2024-06-14 14:07:21,651 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))) [2024-06-14 14:07:21,651 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:07:21,651 INFO L106 edCorrectnessWitness]: ghost_update [L785-L785] multithreaded = 1; [2024-06-14 14:07:21,692 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:07:21,965 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:07:21,975 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:07:22,101 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:07:22,129 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:07:22,129 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22 WrapperNode [2024-06-14 14:07:22,129 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:07:22,131 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:07:22,131 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:07:22,131 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:07:22,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,162 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,196 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-14 14:07:22,197 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:07:22,198 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:07:22,198 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:07:22,198 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:07:22,222 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,225 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,247 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 14:07:22,248 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,248 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,256 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,258 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,261 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,263 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:07:22,264 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:07:22,264 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:07:22,264 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:07:22,265 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (1/1) ... [2024-06-14 14:07:22,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:07:22,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:07:22,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 14:07:22,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 14:07:22,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:07:22,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:07:22,315 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:07:22,315 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:07:22,315 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:07:22,316 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:07:22,316 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:07:22,316 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:07:22,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:07:22,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:07:22,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:07:22,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:07:22,318 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:07:22,418 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:07:22,420 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:07:22,650 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:07:22,650 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:07:22,723 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:07:22,726 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:07:22,727 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:07:22 BoogieIcfgContainer [2024-06-14 14:07:22,727 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:07:22,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:07:22,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:07:22,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:07:22,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:07:21" (1/4) ... [2024-06-14 14:07:22,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1137fc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:07:22, skipping insertion in model container [2024-06-14 14:07:22,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:07:21" (2/4) ... [2024-06-14 14:07:22,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1137fc95 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:07:22, skipping insertion in model container [2024-06-14 14:07:22,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:07:22" (3/4) ... [2024-06-14 14:07:22,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1137fc95 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:07:22, skipping insertion in model container [2024-06-14 14:07:22,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:07:22" (4/4) ... [2024-06-14 14:07:22,735 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 14:07:22,747 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:07:22,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 14:07:22,748 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:07:22,801 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:07:22,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 14:07:22,858 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 14:07:22,858 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:07:22,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 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. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:07:22,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 14:07:22,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 14:07:22,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:07:22,880 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;@466bb76a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:07:22,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 14:07:22,886 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:07:22,886 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:07:22,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:07:22,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:22,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:07:22,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:22,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1639610770, now seen corresponding path program 1 times [2024-06-14 14:07:22,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:22,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008786117] [2024-06-14 14:07:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:22,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:23,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:23,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008786117] [2024-06-14 14:07:23,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008786117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:23,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:23,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:07:23,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45111494] [2024-06-14 14:07:23,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:23,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:07:23,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:23,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:07:23,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:07:23,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-06-14 14:07:23,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:23,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:23,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-06-14 14:07:23,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:23,820 INFO L124 PetriNetUnfolderBase]: 471/887 cut-off events. [2024-06-14 14:07:23,820 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-14 14:07:23,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 887 events. 471/887 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4783 event pairs, 288 based on Foata normal form. 1/816 useless extension candidates. Maximal degree in co-relation 1662. Up to 733 conditions per place. [2024-06-14 14:07:23,873 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 29 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 14:07:23,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 171 flow [2024-06-14 14:07:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:07:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:07:23,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-14 14:07:23,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-06-14 14:07:23,884 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 93 transitions. [2024-06-14 14:07:23,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 171 flow [2024-06-14 14:07:23,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:23,888 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 14:07:23,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 14:07:23,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 14:07:23,891 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 14:07:23,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:23,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:23,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:23,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:07:23,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:23,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash 587069773, now seen corresponding path program 1 times [2024-06-14 14:07:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:23,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327608263] [2024-06-14 14:07:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:23,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:24,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327608263] [2024-06-14 14:07:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327608263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:24,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:24,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:07:24,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830546553] [2024-06-14 14:07:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:24,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:07:24,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:24,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:07:24,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:07:24,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:07:24,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:24,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:24,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:07:24,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:24,376 INFO L124 PetriNetUnfolderBase]: 737/1263 cut-off events. [2024-06-14 14:07:24,377 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2024-06-14 14:07:24,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2813 conditions, 1263 events. 737/1263 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6778 event pairs, 403 based on Foata normal form. 4/1238 useless extension candidates. Maximal degree in co-relation 2798. Up to 1096 conditions per place. [2024-06-14 14:07:24,385 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 40 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-06-14 14:07:24,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 272 flow [2024-06-14 14:07:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:07:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:07:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-14 14:07:24,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-06-14 14:07:24,390 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 120 transitions. [2024-06-14 14:07:24,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 272 flow [2024-06-14 14:07:24,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:07:24,394 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 178 flow [2024-06-14 14:07:24,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2024-06-14 14:07:24,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2024-06-14 14:07:24,395 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 178 flow [2024-06-14 14:07:24,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:24,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:24,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:24,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:07:24,398 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)] === [2024-06-14 14:07:24,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:24,399 INFO L85 PathProgramCache]: Analyzing trace with hash -119441014, now seen corresponding path program 1 times [2024-06-14 14:07:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:24,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76699627] [2024-06-14 14:07:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:24,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:24,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76699627] [2024-06-14 14:07:24,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76699627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:24,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:24,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:07:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286404925] [2024-06-14 14:07:24,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:24,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:07:24,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:24,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:07:24,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:07:24,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-14 14:07:24,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:24,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:24,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-14 14:07:24,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:24,850 INFO L124 PetriNetUnfolderBase]: 640/1206 cut-off events. [2024-06-14 14:07:24,850 INFO L125 PetriNetUnfolderBase]: For 803/811 co-relation queries the response was YES. [2024-06-14 14:07:24,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3077 conditions, 1206 events. 640/1206 cut-off events. For 803/811 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6751 event pairs, 322 based on Foata normal form. 2/1176 useless extension candidates. Maximal degree in co-relation 3059. Up to 960 conditions per place. [2024-06-14 14:07:24,856 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 40 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-14 14:07:24,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 314 flow [2024-06-14 14:07:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:07:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:07:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-14 14:07:24,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534090909090909 [2024-06-14 14:07:24,858 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 178 flow. Second operand 4 states and 115 transitions. [2024-06-14 14:07:24,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 314 flow [2024-06-14 14:07:24,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 310 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:07:24,860 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 216 flow [2024-06-14 14:07:24,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-06-14 14:07:24,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-14 14:07:24,861 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 216 flow [2024-06-14 14:07:24,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:24,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:24,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:24,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:07:24,861 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)] === [2024-06-14 14:07:24,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:24,862 INFO L85 PathProgramCache]: Analyzing trace with hash 385368843, now seen corresponding path program 1 times [2024-06-14 14:07:24,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:24,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656859914] [2024-06-14 14:07:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:24,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:25,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:25,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656859914] [2024-06-14 14:07:25,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656859914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:25,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:25,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:25,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712714824] [2024-06-14 14:07:25,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:25,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:25,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:25,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:25,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:25,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:25,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:25,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:25,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:25,277 INFO L124 PetriNetUnfolderBase]: 940/1598 cut-off events. [2024-06-14 14:07:25,277 INFO L125 PetriNetUnfolderBase]: For 1705/1705 co-relation queries the response was YES. [2024-06-14 14:07:25,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4532 conditions, 1598 events. 940/1598 cut-off events. For 1705/1705 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8433 event pairs, 287 based on Foata normal form. 8/1602 useless extension candidates. Maximal degree in co-relation 4511. Up to 1330 conditions per place. [2024-06-14 14:07:25,287 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 56 selfloop transitions, 18 changer transitions 0/83 dead transitions. [2024-06-14 14:07:25,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 470 flow [2024-06-14 14:07:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-14 14:07:25,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-14 14:07:25,288 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 216 flow. Second operand 6 states and 168 transitions. [2024-06-14 14:07:25,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 470 flow [2024-06-14 14:07:25,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 83 transitions, 452 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 14:07:25,292 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 286 flow [2024-06-14 14:07:25,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-14 14:07:25,293 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-06-14 14:07:25,293 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 286 flow [2024-06-14 14:07:25,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:25,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:25,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:07:25,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:25,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1451540909, now seen corresponding path program 1 times [2024-06-14 14:07:25,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:25,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394381747] [2024-06-14 14:07:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:25,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:25,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:25,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394381747] [2024-06-14 14:07:25,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394381747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:25,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:25,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:07:25,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863045680] [2024-06-14 14:07:25,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:25,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:07:25,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:25,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:07:25,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:07:25,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:25,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:25,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:25,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:25,739 INFO L124 PetriNetUnfolderBase]: 966/1681 cut-off events. [2024-06-14 14:07:25,740 INFO L125 PetriNetUnfolderBase]: For 2751/2751 co-relation queries the response was YES. [2024-06-14 14:07:25,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5190 conditions, 1681 events. 966/1681 cut-off events. For 2751/2751 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9145 event pairs, 323 based on Foata normal form. 3/1678 useless extension candidates. Maximal degree in co-relation 5167. Up to 1376 conditions per place. [2024-06-14 14:07:25,749 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 62 selfloop transitions, 21 changer transitions 0/92 dead transitions. [2024-06-14 14:07:25,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 616 flow [2024-06-14 14:07:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:07:25,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:07:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-14 14:07:25,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-14 14:07:25,751 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 286 flow. Second operand 5 states and 143 transitions. [2024-06-14 14:07:25,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 616 flow [2024-06-14 14:07:25,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 570 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:25,758 INFO L231 Difference]: Finished difference. Result has 60 places, 69 transitions, 394 flow [2024-06-14 14:07:25,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=394, PETRI_PLACES=60, PETRI_TRANSITIONS=69} [2024-06-14 14:07:25,760 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-14 14:07:25,760 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 69 transitions, 394 flow [2024-06-14 14:07:25,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:25,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:07:25,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:25,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2069513499, now seen corresponding path program 2 times [2024-06-14 14:07:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:25,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557424960] [2024-06-14 14:07:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:26,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:26,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557424960] [2024-06-14 14:07:26,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557424960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:26,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:26,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:07:26,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434302763] [2024-06-14 14:07:26,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:26,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:07:26,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:26,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:07:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:07:26,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:26,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 69 transitions, 394 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:26,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:26,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:26,213 INFO L124 PetriNetUnfolderBase]: 960/1667 cut-off events. [2024-06-14 14:07:26,214 INFO L125 PetriNetUnfolderBase]: For 4024/4024 co-relation queries the response was YES. [2024-06-14 14:07:26,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 1667 events. 960/1667 cut-off events. For 4024/4024 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9019 event pairs, 323 based on Foata normal form. 3/1665 useless extension candidates. Maximal degree in co-relation 5642. Up to 1372 conditions per place. [2024-06-14 14:07:26,224 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 60 selfloop transitions, 20 changer transitions 0/89 dead transitions. [2024-06-14 14:07:26,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 634 flow [2024-06-14 14:07:26,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:07:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:07:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-14 14:07:26,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-06-14 14:07:26,225 INFO L175 Difference]: Start difference. First operand has 60 places, 69 transitions, 394 flow. Second operand 5 states and 138 transitions. [2024-06-14 14:07:26,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 634 flow [2024-06-14 14:07:26,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 606 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-14 14:07:26,231 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 440 flow [2024-06-14 14:07:26,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=440, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-06-14 14:07:26,231 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-14 14:07:26,231 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 440 flow [2024-06-14 14:07:26,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:26,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:26,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:07:26,232 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)] === [2024-06-14 14:07:26,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash 958459876, now seen corresponding path program 1 times [2024-06-14 14:07:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:26,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395181643] [2024-06-14 14:07:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:26,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:26,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395181643] [2024-06-14 14:07:26,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395181643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:26,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:26,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:07:26,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493745940] [2024-06-14 14:07:26,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:26,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:07:26,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:26,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:07:26,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:07:26,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:07:26,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:26,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:07:26,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:26,655 INFO L124 PetriNetUnfolderBase]: 878/1546 cut-off events. [2024-06-14 14:07:26,655 INFO L125 PetriNetUnfolderBase]: For 4494/4494 co-relation queries the response was YES. [2024-06-14 14:07:26,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5412 conditions, 1546 events. 878/1546 cut-off events. For 4494/4494 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8416 event pairs, 356 based on Foata normal form. 3/1540 useless extension candidates. Maximal degree in co-relation 5383. Up to 1284 conditions per place. [2024-06-14 14:07:26,664 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 48 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-14 14:07:26,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 588 flow [2024-06-14 14:07:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:07:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:07:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-14 14:07:26,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 14:07:26,665 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 440 flow. Second operand 4 states and 110 transitions. [2024-06-14 14:07:26,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 588 flow [2024-06-14 14:07:26,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 546 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:26,670 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 441 flow [2024-06-14 14:07:26,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2024-06-14 14:07:26,671 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-14 14:07:26,671 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 441 flow [2024-06-14 14:07:26,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:26,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:26,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:07:26,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:26,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:26,672 INFO L85 PathProgramCache]: Analyzing trace with hash -283232214, now seen corresponding path program 1 times [2024-06-14 14:07:26,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:26,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712678750] [2024-06-14 14:07:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:26,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:26,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:26,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712678750] [2024-06-14 14:07:26,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712678750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:26,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:26,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:26,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593400955] [2024-06-14 14:07:26,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:26,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:26,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:26,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:26,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:26,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:26,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 441 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:26,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:26,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:27,188 INFO L124 PetriNetUnfolderBase]: 958/1645 cut-off events. [2024-06-14 14:07:27,189 INFO L125 PetriNetUnfolderBase]: For 5350/5350 co-relation queries the response was YES. [2024-06-14 14:07:27,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5833 conditions, 1645 events. 958/1645 cut-off events. For 5350/5350 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8762 event pairs, 339 based on Foata normal form. 3/1644 useless extension candidates. Maximal degree in co-relation 5803. Up to 1388 conditions per place. [2024-06-14 14:07:27,201 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 70 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-14 14:07:27,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 715 flow [2024-06-14 14:07:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 14:07:27,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-06-14 14:07:27,203 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 441 flow. Second operand 6 states and 166 transitions. [2024-06-14 14:07:27,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 715 flow [2024-06-14 14:07:27,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 675 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:27,211 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 488 flow [2024-06-14 14:07:27,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=488, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-14 14:07:27,213 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-14 14:07:27,213 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 488 flow [2024-06-14 14:07:27,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:27,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:27,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:27,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:07:27,214 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:27,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash -712120854, now seen corresponding path program 2 times [2024-06-14 14:07:27,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:27,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118244760] [2024-06-14 14:07:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:27,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:27,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:27,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118244760] [2024-06-14 14:07:27,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118244760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:27,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:27,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:27,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158478168] [2024-06-14 14:07:27,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:27,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:27,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:27,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:27,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:27,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 488 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:27,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:27,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:27,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:27,671 INFO L124 PetriNetUnfolderBase]: 982/1713 cut-off events. [2024-06-14 14:07:27,671 INFO L125 PetriNetUnfolderBase]: For 6735/6735 co-relation queries the response was YES. [2024-06-14 14:07:27,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1713 events. 982/1713 cut-off events. For 6735/6735 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9292 event pairs, 310 based on Foata normal form. 3/1708 useless extension candidates. Maximal degree in co-relation 6435. Up to 1332 conditions per place. [2024-06-14 14:07:27,691 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 64 selfloop transitions, 39 changer transitions 0/112 dead transitions. [2024-06-14 14:07:27,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 112 transitions, 900 flow [2024-06-14 14:07:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-14 14:07:27,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2024-06-14 14:07:27,693 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 488 flow. Second operand 6 states and 170 transitions. [2024-06-14 14:07:27,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 112 transitions, 900 flow [2024-06-14 14:07:27,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 843 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:27,703 INFO L231 Difference]: Finished difference. Result has 72 places, 86 transitions, 620 flow [2024-06-14 14:07:27,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=72, PETRI_TRANSITIONS=86} [2024-06-14 14:07:27,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2024-06-14 14:07:27,705 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 86 transitions, 620 flow [2024-06-14 14:07:27,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:27,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:07:27,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:27,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:27,706 INFO L85 PathProgramCache]: Analyzing trace with hash -707472280, now seen corresponding path program 1 times [2024-06-14 14:07:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:27,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118989419] [2024-06-14 14:07:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:27,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:27,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:27,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118989419] [2024-06-14 14:07:27,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118989419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:27,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:27,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:27,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983707373] [2024-06-14 14:07:27,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:27,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:27,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:27,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:27,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 86 transitions, 620 flow. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:27,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:27,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:27,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:28,198 INFO L124 PetriNetUnfolderBase]: 1006/1752 cut-off events. [2024-06-14 14:07:28,198 INFO L125 PetriNetUnfolderBase]: For 8799/8799 co-relation queries the response was YES. [2024-06-14 14:07:28,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7069 conditions, 1752 events. 1006/1752 cut-off events. For 8799/8799 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9547 event pairs, 303 based on Foata normal form. 3/1749 useless extension candidates. Maximal degree in co-relation 7038. Up to 1381 conditions per place. [2024-06-14 14:07:28,207 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 88 selfloop transitions, 36 changer transitions 0/133 dead transitions. [2024-06-14 14:07:28,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 133 transitions, 1128 flow [2024-06-14 14:07:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:28,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-14 14:07:28,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164772727272727 [2024-06-14 14:07:28,209 INFO L175 Difference]: Start difference. First operand has 72 places, 86 transitions, 620 flow. Second operand 8 states and 217 transitions. [2024-06-14 14:07:28,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 133 transitions, 1128 flow [2024-06-14 14:07:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 1090 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-14 14:07:28,217 INFO L231 Difference]: Finished difference. Result has 80 places, 98 transitions, 784 flow [2024-06-14 14:07:28,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=784, PETRI_PLACES=80, PETRI_TRANSITIONS=98} [2024-06-14 14:07:28,217 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-14 14:07:28,218 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 98 transitions, 784 flow [2024-06-14 14:07:28,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:28,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:28,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:28,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:07:28,218 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)] === [2024-06-14 14:07:28,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash -432273494, now seen corresponding path program 3 times [2024-06-14 14:07:28,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:28,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009030300] [2024-06-14 14:07:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:28,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:28,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009030300] [2024-06-14 14:07:28,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009030300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:28,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:28,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140011586] [2024-06-14 14:07:28,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:28,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:28,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:28,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:28,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 98 transitions, 784 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:28,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:28,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:28,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:28,652 INFO L124 PetriNetUnfolderBase]: 1000/1727 cut-off events. [2024-06-14 14:07:28,652 INFO L125 PetriNetUnfolderBase]: For 11177/11177 co-relation queries the response was YES. [2024-06-14 14:07:28,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7586 conditions, 1727 events. 1000/1727 cut-off events. For 11177/11177 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9368 event pairs, 303 based on Foata normal form. 3/1722 useless extension candidates. Maximal degree in co-relation 7551. Up to 1362 conditions per place. [2024-06-14 14:07:28,662 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 75 selfloop transitions, 35 changer transitions 0/119 dead transitions. [2024-06-14 14:07:28,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 119 transitions, 1078 flow [2024-06-14 14:07:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 14:07:28,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-06-14 14:07:28,664 INFO L175 Difference]: Start difference. First operand has 80 places, 98 transitions, 784 flow. Second operand 6 states and 163 transitions. [2024-06-14 14:07:28,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 119 transitions, 1078 flow [2024-06-14 14:07:28,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 119 transitions, 978 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:28,675 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 763 flow [2024-06-14 14:07:28,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-14 14:07:28,676 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-06-14 14:07:28,676 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 763 flow [2024-06-14 14:07:28,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:28,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:28,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:28,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:07:28,677 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:28,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:28,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1412091274, now seen corresponding path program 2 times [2024-06-14 14:07:28,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:28,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320342872] [2024-06-14 14:07:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:28,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:28,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:28,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320342872] [2024-06-14 14:07:28,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320342872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:28,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:28,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:28,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151666487] [2024-06-14 14:07:28,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:28,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:28,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:28,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:28,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 763 flow. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:28,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:28,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:28,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:29,138 INFO L124 PetriNetUnfolderBase]: 1018/1766 cut-off events. [2024-06-14 14:07:29,138 INFO L125 PetriNetUnfolderBase]: For 12422/12422 co-relation queries the response was YES. [2024-06-14 14:07:29,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7859 conditions, 1766 events. 1018/1766 cut-off events. For 12422/12422 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9603 event pairs, 297 based on Foata normal form. 3/1764 useless extension candidates. Maximal degree in co-relation 7822. Up to 1392 conditions per place. [2024-06-14 14:07:29,149 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 88 selfloop transitions, 37 changer transitions 0/134 dead transitions. [2024-06-14 14:07:29,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 134 transitions, 1212 flow [2024-06-14 14:07:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 14:07:29,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6051136363636364 [2024-06-14 14:07:29,151 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 763 flow. Second operand 8 states and 213 transitions. [2024-06-14 14:07:29,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 134 transitions, 1212 flow [2024-06-14 14:07:29,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 134 transitions, 1135 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:29,164 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 802 flow [2024-06-14 14:07:29,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=802, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-06-14 14:07:29,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-14 14:07:29,165 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 802 flow [2024-06-14 14:07:29,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:29,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:29,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:29,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:07:29,166 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:29,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:29,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1412387944, now seen corresponding path program 3 times [2024-06-14 14:07:29,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:29,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170862548] [2024-06-14 14:07:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:29,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:29,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:29,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170862548] [2024-06-14 14:07:29,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170862548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:29,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:29,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182481110] [2024-06-14 14:07:29,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:29,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:29,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:29,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:29,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 802 flow. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:29,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:29,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:29,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:29,678 INFO L124 PetriNetUnfolderBase]: 1059/1853 cut-off events. [2024-06-14 14:07:29,679 INFO L125 PetriNetUnfolderBase]: For 14170/14170 co-relation queries the response was YES. [2024-06-14 14:07:29,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8419 conditions, 1853 events. 1059/1853 cut-off events. For 14170/14170 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10254 event pairs, 301 based on Foata normal form. 3/1855 useless extension candidates. Maximal degree in co-relation 8381. Up to 1530 conditions per place. [2024-06-14 14:07:29,691 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 101 selfloop transitions, 24 changer transitions 0/134 dead transitions. [2024-06-14 14:07:29,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 1273 flow [2024-06-14 14:07:29,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:07:29,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 14:07:29,692 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 802 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:07:29,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 1273 flow [2024-06-14 14:07:29,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 134 transitions, 1153 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:29,708 INFO L231 Difference]: Finished difference. Result has 88 places, 116 transitions, 929 flow [2024-06-14 14:07:29,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=929, PETRI_PLACES=88, PETRI_TRANSITIONS=116} [2024-06-14 14:07:29,709 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 14:07:29,709 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 116 transitions, 929 flow [2024-06-14 14:07:29,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:29,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:29,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:29,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:07:29,710 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:29,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1412398856, now seen corresponding path program 1 times [2024-06-14 14:07:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613044727] [2024-06-14 14:07:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:29,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:29,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613044727] [2024-06-14 14:07:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613044727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:29,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:29,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:29,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18619694] [2024-06-14 14:07:29,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:29,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:29,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:07:29,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 929 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:29,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:29,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:07:29,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:30,179 INFO L124 PetriNetUnfolderBase]: 997/1784 cut-off events. [2024-06-14 14:07:30,180 INFO L125 PetriNetUnfolderBase]: For 15364/15364 co-relation queries the response was YES. [2024-06-14 14:07:30,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8185 conditions, 1784 events. 997/1784 cut-off events. For 15364/15364 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10074 event pairs, 289 based on Foata normal form. 4/1787 useless extension candidates. Maximal degree in co-relation 8145. Up to 1375 conditions per place. [2024-06-14 14:07:30,190 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 95 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2024-06-14 14:07:30,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 135 transitions, 1222 flow [2024-06-14 14:07:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:07:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:07:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-14 14:07:30,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6181818181818182 [2024-06-14 14:07:30,192 INFO L175 Difference]: Start difference. First operand has 88 places, 116 transitions, 929 flow. Second operand 5 states and 136 transitions. [2024-06-14 14:07:30,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 135 transitions, 1222 flow [2024-06-14 14:07:30,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 135 transitions, 1181 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:30,212 INFO L231 Difference]: Finished difference. Result has 90 places, 118 transitions, 949 flow [2024-06-14 14:07:30,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=949, PETRI_PLACES=90, PETRI_TRANSITIONS=118} [2024-06-14 14:07:30,213 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 45 predicate places. [2024-06-14 14:07:30,213 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 118 transitions, 949 flow [2024-06-14 14:07:30,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:30,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:30,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:30,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:07:30,214 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)] === [2024-06-14 14:07:30,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:30,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1177246977, now seen corresponding path program 1 times [2024-06-14 14:07:30,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:30,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802010476] [2024-06-14 14:07:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:30,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:30,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:30,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802010476] [2024-06-14 14:07:30,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802010476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:30,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:30,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:07:30,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894401003] [2024-06-14 14:07:30,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:07:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:07:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:07:30,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:30,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 118 transitions, 949 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) [2024-06-14 14:07:30,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:30,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:30,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:30,660 INFO L124 PetriNetUnfolderBase]: 1048/1836 cut-off events. [2024-06-14 14:07:30,660 INFO L125 PetriNetUnfolderBase]: For 16980/16980 co-relation queries the response was YES. [2024-06-14 14:07:30,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8544 conditions, 1836 events. 1048/1836 cut-off events. For 16980/16980 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10177 event pairs, 320 based on Foata normal form. 3/1834 useless extension candidates. Maximal degree in co-relation 8503. Up to 1496 conditions per place. [2024-06-14 14:07:30,671 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 96 selfloop transitions, 30 changer transitions 0/135 dead transitions. [2024-06-14 14:07:30,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1305 flow [2024-06-14 14:07:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:07:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:07:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-14 14:07:30,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045454545454545 [2024-06-14 14:07:30,672 INFO L175 Difference]: Start difference. First operand has 90 places, 118 transitions, 949 flow. Second operand 5 states and 133 transitions. [2024-06-14 14:07:30,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1305 flow [2024-06-14 14:07:30,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 1260 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:30,691 INFO L231 Difference]: Finished difference. Result has 93 places, 122 transitions, 1041 flow [2024-06-14 14:07:30,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1041, PETRI_PLACES=93, PETRI_TRANSITIONS=122} [2024-06-14 14:07:30,692 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-14 14:07:30,692 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 122 transitions, 1041 flow [2024-06-14 14:07:30,692 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) [2024-06-14 14:07:30,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:30,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:30,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:07:30,692 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)] === [2024-06-14 14:07:30,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1957566267, now seen corresponding path program 2 times [2024-06-14 14:07:30,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:30,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278653927] [2024-06-14 14:07:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:30,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:30,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:30,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278653927] [2024-06-14 14:07:30,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278653927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:30,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:30,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:07:30,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377857021] [2024-06-14 14:07:30,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:30,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:07:30,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:07:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:07:30,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:30,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 122 transitions, 1041 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) [2024-06-14 14:07:30,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:30,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:30,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:31,143 INFO L124 PetriNetUnfolderBase]: 1036/1807 cut-off events. [2024-06-14 14:07:31,143 INFO L125 PetriNetUnfolderBase]: For 18497/18497 co-relation queries the response was YES. [2024-06-14 14:07:31,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8590 conditions, 1807 events. 1036/1807 cut-off events. For 18497/18497 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9975 event pairs, 333 based on Foata normal form. 2/1804 useless extension candidates. Maximal degree in co-relation 8547. Up to 1482 conditions per place. [2024-06-14 14:07:31,155 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 90 selfloop transitions, 33 changer transitions 0/132 dead transitions. [2024-06-14 14:07:31,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 132 transitions, 1325 flow [2024-06-14 14:07:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:07:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:07:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 14:07:31,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:07:31,157 INFO L175 Difference]: Start difference. First operand has 93 places, 122 transitions, 1041 flow. Second operand 5 states and 130 transitions. [2024-06-14 14:07:31,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 132 transitions, 1325 flow [2024-06-14 14:07:31,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 132 transitions, 1281 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 14:07:31,180 INFO L231 Difference]: Finished difference. Result has 96 places, 123 transitions, 1086 flow [2024-06-14 14:07:31,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1086, PETRI_PLACES=96, PETRI_TRANSITIONS=123} [2024-06-14 14:07:31,181 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-14 14:07:31,182 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 123 transitions, 1086 flow [2024-06-14 14:07:31,182 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) [2024-06-14 14:07:31,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:31,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:31,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:07:31,182 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)] === [2024-06-14 14:07:31,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1931974155, now seen corresponding path program 1 times [2024-06-14 14:07:31,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:31,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038897491] [2024-06-14 14:07:31,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:31,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:31,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:31,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038897491] [2024-06-14 14:07:31,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038897491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:31,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:31,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:07:31,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200769547] [2024-06-14 14:07:31,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:31,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:07:31,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:07:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:07:31,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:07:31,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 123 transitions, 1086 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:31,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:31,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:07:31,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:31,636 INFO L124 PetriNetUnfolderBase]: 981/1751 cut-off events. [2024-06-14 14:07:31,636 INFO L125 PetriNetUnfolderBase]: For 19799/19799 co-relation queries the response was YES. [2024-06-14 14:07:31,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8381 conditions, 1751 events. 981/1751 cut-off events. For 19799/19799 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9864 event pairs, 317 based on Foata normal form. 3/1744 useless extension candidates. Maximal degree in co-relation 8337. Up to 1371 conditions per place. [2024-06-14 14:07:31,649 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 95 selfloop transitions, 21 changer transitions 0/140 dead transitions. [2024-06-14 14:07:31,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 140 transitions, 1424 flow [2024-06-14 14:07:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:07:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:07:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-14 14:07:31,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-06-14 14:07:31,651 INFO L175 Difference]: Start difference. First operand has 96 places, 123 transitions, 1086 flow. Second operand 5 states and 134 transitions. [2024-06-14 14:07:31,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 140 transitions, 1424 flow [2024-06-14 14:07:31,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 140 transitions, 1388 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 14:07:31,672 INFO L231 Difference]: Finished difference. Result has 100 places, 130 transitions, 1158 flow [2024-06-14 14:07:31,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1158, PETRI_PLACES=100, PETRI_TRANSITIONS=130} [2024-06-14 14:07:31,673 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-14 14:07:31,673 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 130 transitions, 1158 flow [2024-06-14 14:07:31,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:31,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:31,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:31,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:07:31,674 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:31,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash 230057767, now seen corresponding path program 1 times [2024-06-14 14:07:31,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:31,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837896650] [2024-06-14 14:07:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:31,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:31,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837896650] [2024-06-14 14:07:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837896650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:31,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:31,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:31,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312261518] [2024-06-14 14:07:31,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:31,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:31,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:31,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:31,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 130 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:31,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:31,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:31,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:32,274 INFO L124 PetriNetUnfolderBase]: 1106/1906 cut-off events. [2024-06-14 14:07:32,274 INFO L125 PetriNetUnfolderBase]: For 24381/24381 co-relation queries the response was YES. [2024-06-14 14:07:32,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9607 conditions, 1906 events. 1106/1906 cut-off events. For 24381/24381 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10531 event pairs, 203 based on Foata normal form. 6/1908 useless extension candidates. Maximal degree in co-relation 9561. Up to 1505 conditions per place. [2024-06-14 14:07:32,288 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 134 selfloop transitions, 30 changer transitions 0/173 dead transitions. [2024-06-14 14:07:32,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 173 transitions, 1722 flow [2024-06-14 14:07:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-14 14:07:32,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164772727272727 [2024-06-14 14:07:32,290 INFO L175 Difference]: Start difference. First operand has 100 places, 130 transitions, 1158 flow. Second operand 8 states and 217 transitions. [2024-06-14 14:07:32,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 173 transitions, 1722 flow [2024-06-14 14:07:32,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 1689 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 14:07:32,322 INFO L231 Difference]: Finished difference. Result has 107 places, 136 transitions, 1283 flow [2024-06-14 14:07:32,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1283, PETRI_PLACES=107, PETRI_TRANSITIONS=136} [2024-06-14 14:07:32,322 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-14 14:07:32,323 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 136 transitions, 1283 flow [2024-06-14 14:07:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:32,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:32,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:32,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:07:32,323 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:32,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1298969843, now seen corresponding path program 2 times [2024-06-14 14:07:32,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:32,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091792128] [2024-06-14 14:07:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:32,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:32,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091792128] [2024-06-14 14:07:32,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091792128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:32,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:32,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:32,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855069363] [2024-06-14 14:07:32,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:32,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:32,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:32,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:32,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:32,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:32,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 136 transitions, 1283 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:32,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:32,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:32,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:32,932 INFO L124 PetriNetUnfolderBase]: 1093/1887 cut-off events. [2024-06-14 14:07:32,932 INFO L125 PetriNetUnfolderBase]: For 26722/26722 co-relation queries the response was YES. [2024-06-14 14:07:32,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9843 conditions, 1887 events. 1093/1887 cut-off events. For 26722/26722 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10475 event pairs, 288 based on Foata normal form. 6/1889 useless extension candidates. Maximal degree in co-relation 9794. Up to 1562 conditions per place. [2024-06-14 14:07:32,946 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 133 selfloop transitions, 24 changer transitions 0/166 dead transitions. [2024-06-14 14:07:32,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 166 transitions, 1673 flow [2024-06-14 14:07:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 14:07:32,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168831168831169 [2024-06-14 14:07:32,948 INFO L175 Difference]: Start difference. First operand has 107 places, 136 transitions, 1283 flow. Second operand 7 states and 190 transitions. [2024-06-14 14:07:32,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 166 transitions, 1673 flow [2024-06-14 14:07:32,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 166 transitions, 1578 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:32,978 INFO L231 Difference]: Finished difference. Result has 110 places, 136 transitions, 1244 flow [2024-06-14 14:07:32,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=110, PETRI_TRANSITIONS=136} [2024-06-14 14:07:32,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 65 predicate places. [2024-06-14 14:07:32,979 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 136 transitions, 1244 flow [2024-06-14 14:07:32,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:32,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:32,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:32,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:07:32,980 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:32,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash 263682763, now seen corresponding path program 1 times [2024-06-14 14:07:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:32,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223794113] [2024-06-14 14:07:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:32,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:33,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:33,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223794113] [2024-06-14 14:07:33,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223794113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:33,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:33,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967233507] [2024-06-14 14:07:33,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:33,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:33,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:33,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:33,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 136 transitions, 1244 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:33,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:33,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:33,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:33,572 INFO L124 PetriNetUnfolderBase]: 1109/1915 cut-off events. [2024-06-14 14:07:33,572 INFO L125 PetriNetUnfolderBase]: For 28420/28420 co-relation queries the response was YES. [2024-06-14 14:07:33,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10003 conditions, 1915 events. 1109/1915 cut-off events. For 28420/28420 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10629 event pairs, 273 based on Foata normal form. 3/1914 useless extension candidates. Maximal degree in co-relation 9952. Up to 1597 conditions per place. [2024-06-14 14:07:33,586 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 135 selfloop transitions, 25 changer transitions 0/169 dead transitions. [2024-06-14 14:07:33,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 169 transitions, 1692 flow [2024-06-14 14:07:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 14:07:33,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168831168831169 [2024-06-14 14:07:33,588 INFO L175 Difference]: Start difference. First operand has 110 places, 136 transitions, 1244 flow. Second operand 7 states and 190 transitions. [2024-06-14 14:07:33,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 169 transitions, 1692 flow [2024-06-14 14:07:33,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 169 transitions, 1636 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:33,625 INFO L231 Difference]: Finished difference. Result has 111 places, 140 transitions, 1309 flow [2024-06-14 14:07:33,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1309, PETRI_PLACES=111, PETRI_TRANSITIONS=140} [2024-06-14 14:07:33,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-14 14:07:33,626 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 140 transitions, 1309 flow [2024-06-14 14:07:33,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:33,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:33,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:07:33,627 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:33,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:33,627 INFO L85 PathProgramCache]: Analyzing trace with hash -435276645, now seen corresponding path program 3 times [2024-06-14 14:07:33,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:33,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900445863] [2024-06-14 14:07:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:33,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:33,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900445863] [2024-06-14 14:07:33,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900445863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:33,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:33,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:33,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515579646] [2024-06-14 14:07:33,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:33,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:33,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:33,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:33,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 140 transitions, 1309 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:33,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:33,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:33,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:34,136 INFO L124 PetriNetUnfolderBase]: 1134/1947 cut-off events. [2024-06-14 14:07:34,136 INFO L125 PetriNetUnfolderBase]: For 32318/32318 co-relation queries the response was YES. [2024-06-14 14:07:34,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10567 conditions, 1947 events. 1134/1947 cut-off events. For 32318/32318 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10801 event pairs, 282 based on Foata normal form. 6/1944 useless extension candidates. Maximal degree in co-relation 10515. Up to 1531 conditions per place. [2024-06-14 14:07:34,152 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 112 selfloop transitions, 50 changer transitions 0/171 dead transitions. [2024-06-14 14:07:34,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 171 transitions, 1795 flow [2024-06-14 14:07:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 14:07:34,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2024-06-14 14:07:34,153 INFO L175 Difference]: Start difference. First operand has 111 places, 140 transitions, 1309 flow. Second operand 7 states and 192 transitions. [2024-06-14 14:07:34,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 171 transitions, 1795 flow [2024-06-14 14:07:34,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 171 transitions, 1704 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:34,187 INFO L231 Difference]: Finished difference. Result has 113 places, 143 transitions, 1384 flow [2024-06-14 14:07:34,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1384, PETRI_PLACES=113, PETRI_TRANSITIONS=143} [2024-06-14 14:07:34,187 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-14 14:07:34,188 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 143 transitions, 1384 flow [2024-06-14 14:07:34,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:34,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:34,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:34,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:07:34,188 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)] === [2024-06-14 14:07:34,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:34,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1276218327, now seen corresponding path program 2 times [2024-06-14 14:07:34,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:34,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962458517] [2024-06-14 14:07:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:34,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:34,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:34,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962458517] [2024-06-14 14:07:34,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962458517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:34,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:34,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664440044] [2024-06-14 14:07:34,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:34,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:34,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:34,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:34,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 143 transitions, 1384 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:34,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:34,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:34,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:34,787 INFO L124 PetriNetUnfolderBase]: 1182/2033 cut-off events. [2024-06-14 14:07:34,787 INFO L125 PetriNetUnfolderBase]: For 36710/36710 co-relation queries the response was YES. [2024-06-14 14:07:34,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11424 conditions, 2033 events. 1182/2033 cut-off events. For 36710/36710 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11389 event pairs, 278 based on Foata normal form. 3/2027 useless extension candidates. Maximal degree in co-relation 11371. Up to 1451 conditions per place. [2024-06-14 14:07:34,806 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 111 selfloop transitions, 86 changer transitions 0/206 dead transitions. [2024-06-14 14:07:34,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 206 transitions, 2370 flow [2024-06-14 14:07:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 297 transitions. [2024-06-14 14:07:34,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-14 14:07:34,807 INFO L175 Difference]: Start difference. First operand has 113 places, 143 transitions, 1384 flow. Second operand 11 states and 297 transitions. [2024-06-14 14:07:34,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 206 transitions, 2370 flow [2024-06-14 14:07:34,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 206 transitions, 2228 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:34,856 INFO L231 Difference]: Finished difference. Result has 119 places, 158 transitions, 1669 flow [2024-06-14 14:07:34,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1669, PETRI_PLACES=119, PETRI_TRANSITIONS=158} [2024-06-14 14:07:34,856 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-14 14:07:34,857 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 158 transitions, 1669 flow [2024-06-14 14:07:34,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:34,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:34,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:34,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:07:34,858 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)] === [2024-06-14 14:07:34,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:34,858 INFO L85 PathProgramCache]: Analyzing trace with hash 478841641, now seen corresponding path program 3 times [2024-06-14 14:07:34,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:34,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707226263] [2024-06-14 14:07:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:34,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:35,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:35,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707226263] [2024-06-14 14:07:35,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707226263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:35,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:35,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:35,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65307295] [2024-06-14 14:07:35,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:35,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:35,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:35,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:35,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:35,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:35,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 158 transitions, 1669 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:35,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:35,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:35,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:35,434 INFO L124 PetriNetUnfolderBase]: 1174/2022 cut-off events. [2024-06-14 14:07:35,435 INFO L125 PetriNetUnfolderBase]: For 39559/39559 co-relation queries the response was YES. [2024-06-14 14:07:35,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11682 conditions, 2022 events. 1174/2022 cut-off events. For 39559/39559 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11367 event pairs, 278 based on Foata normal form. 3/2016 useless extension candidates. Maximal degree in co-relation 11628. Up to 1444 conditions per place. [2024-06-14 14:07:35,449 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 102 selfloop transitions, 85 changer transitions 0/196 dead transitions. [2024-06-14 14:07:35,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 196 transitions, 2305 flow [2024-06-14 14:07:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-14 14:07:35,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6237373737373737 [2024-06-14 14:07:35,451 INFO L175 Difference]: Start difference. First operand has 119 places, 158 transitions, 1669 flow. Second operand 9 states and 247 transitions. [2024-06-14 14:07:35,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 196 transitions, 2305 flow [2024-06-14 14:07:35,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 196 transitions, 2083 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:35,499 INFO L231 Difference]: Finished difference. Result has 123 places, 158 transitions, 1626 flow [2024-06-14 14:07:35,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1626, PETRI_PLACES=123, PETRI_TRANSITIONS=158} [2024-06-14 14:07:35,500 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 78 predicate places. [2024-06-14 14:07:35,500 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 158 transitions, 1626 flow [2024-06-14 14:07:35,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:35,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:35,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:35,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:07:35,500 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)] === [2024-06-14 14:07:35,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash 551288235, now seen corresponding path program 1 times [2024-06-14 14:07:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:35,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132073027] [2024-06-14 14:07:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:35,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:35,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132073027] [2024-06-14 14:07:35,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132073027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:35,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:35,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362297454] [2024-06-14 14:07:35,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:35,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:35,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:35,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:35,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:35,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:35,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 158 transitions, 1626 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:35,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:35,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:35,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:36,120 INFO L124 PetriNetUnfolderBase]: 1199/2054 cut-off events. [2024-06-14 14:07:36,121 INFO L125 PetriNetUnfolderBase]: For 42918/42918 co-relation queries the response was YES. [2024-06-14 14:07:36,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12035 conditions, 2054 events. 1199/2054 cut-off events. For 42918/42918 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11513 event pairs, 274 based on Foata normal form. 6/2051 useless extension candidates. Maximal degree in co-relation 11979. Up to 1625 conditions per place. [2024-06-14 14:07:36,137 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 128 selfloop transitions, 61 changer transitions 0/198 dead transitions. [2024-06-14 14:07:36,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 198 transitions, 2244 flow [2024-06-14 14:07:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-14 14:07:36,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035353535353535 [2024-06-14 14:07:36,138 INFO L175 Difference]: Start difference. First operand has 123 places, 158 transitions, 1626 flow. Second operand 9 states and 239 transitions. [2024-06-14 14:07:36,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 198 transitions, 2244 flow [2024-06-14 14:07:36,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 198 transitions, 2074 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:36,179 INFO L231 Difference]: Finished difference. Result has 124 places, 161 transitions, 1648 flow [2024-06-14 14:07:36,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1648, PETRI_PLACES=124, PETRI_TRANSITIONS=161} [2024-06-14 14:07:36,179 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-14 14:07:36,179 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 161 transitions, 1648 flow [2024-06-14 14:07:36,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:36,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:36,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:36,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:07:36,180 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)] === [2024-06-14 14:07:36,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1197049097, now seen corresponding path program 4 times [2024-06-14 14:07:36,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:36,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48671197] [2024-06-14 14:07:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:36,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48671197] [2024-06-14 14:07:36,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48671197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:36,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:36,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678720591] [2024-06-14 14:07:36,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:36,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:36,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:36,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:36,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 161 transitions, 1648 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:36,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:36,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:36,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:36,733 INFO L124 PetriNetUnfolderBase]: 1199/2076 cut-off events. [2024-06-14 14:07:36,733 INFO L125 PetriNetUnfolderBase]: For 44335/44335 co-relation queries the response was YES. [2024-06-14 14:07:36,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12186 conditions, 2076 events. 1199/2076 cut-off events. For 44335/44335 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11669 event pairs, 279 based on Foata normal form. 6/2074 useless extension candidates. Maximal degree in co-relation 12129. Up to 1627 conditions per place. [2024-06-14 14:07:36,749 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 133 selfloop transitions, 47 changer transitions 0/189 dead transitions. [2024-06-14 14:07:36,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 189 transitions, 2184 flow [2024-06-14 14:07:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 14:07:36,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 14:07:36,750 INFO L175 Difference]: Start difference. First operand has 124 places, 161 transitions, 1648 flow. Second operand 7 states and 187 transitions. [2024-06-14 14:07:36,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 189 transitions, 2184 flow [2024-06-14 14:07:36,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 189 transitions, 2016 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:36,794 INFO L231 Difference]: Finished difference. Result has 124 places, 164 transitions, 1654 flow [2024-06-14 14:07:36,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1654, PETRI_PLACES=124, PETRI_TRANSITIONS=164} [2024-06-14 14:07:36,795 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-14 14:07:36,795 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 164 transitions, 1654 flow [2024-06-14 14:07:36,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:36,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:36,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:36,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:07:36,795 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)] === [2024-06-14 14:07:36,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash -189904087, now seen corresponding path program 4 times [2024-06-14 14:07:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:36,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465316834] [2024-06-14 14:07:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:37,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:37,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465316834] [2024-06-14 14:07:37,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465316834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:37,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:37,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:37,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515482081] [2024-06-14 14:07:37,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:37,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:37,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:37,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:37,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 164 transitions, 1654 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:37,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:37,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:37,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:37,420 INFO L124 PetriNetUnfolderBase]: 1239/2149 cut-off events. [2024-06-14 14:07:37,420 INFO L125 PetriNetUnfolderBase]: For 47851/47851 co-relation queries the response was YES. [2024-06-14 14:07:37,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12691 conditions, 2149 events. 1239/2149 cut-off events. For 47851/47851 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12216 event pairs, 274 based on Foata normal form. 3/2144 useless extension candidates. Maximal degree in co-relation 12633. Up to 1522 conditions per place. [2024-06-14 14:07:37,440 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 115 selfloop transitions, 85 changer transitions 0/209 dead transitions. [2024-06-14 14:07:37,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 209 transitions, 2536 flow [2024-06-14 14:07:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-14 14:07:37,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186868686868687 [2024-06-14 14:07:37,441 INFO L175 Difference]: Start difference. First operand has 124 places, 164 transitions, 1654 flow. Second operand 9 states and 245 transitions. [2024-06-14 14:07:37,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 209 transitions, 2536 flow [2024-06-14 14:07:37,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 209 transitions, 2386 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:37,484 INFO L231 Difference]: Finished difference. Result has 128 places, 172 transitions, 1791 flow [2024-06-14 14:07:37,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1791, PETRI_PLACES=128, PETRI_TRANSITIONS=172} [2024-06-14 14:07:37,484 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 83 predicate places. [2024-06-14 14:07:37,485 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 172 transitions, 1791 flow [2024-06-14 14:07:37,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:37,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:37,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:37,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:07:37,485 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)] === [2024-06-14 14:07:37,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:37,485 INFO L85 PathProgramCache]: Analyzing trace with hash 441848455, now seen corresponding path program 5 times [2024-06-14 14:07:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:37,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247303894] [2024-06-14 14:07:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:37,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:37,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:37,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247303894] [2024-06-14 14:07:37,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247303894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:37,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:37,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:37,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630039161] [2024-06-14 14:07:37,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:37,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:37,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:37,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 172 transitions, 1791 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:37,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:37,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:37,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:38,070 INFO L124 PetriNetUnfolderBase]: 1231/2138 cut-off events. [2024-06-14 14:07:38,070 INFO L125 PetriNetUnfolderBase]: For 49494/49494 co-relation queries the response was YES. [2024-06-14 14:07:38,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12711 conditions, 2138 events. 1231/2138 cut-off events. For 49494/49494 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12158 event pairs, 274 based on Foata normal form. 3/2133 useless extension candidates. Maximal degree in co-relation 12652. Up to 1515 conditions per place. [2024-06-14 14:07:38,087 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 114 selfloop transitions, 89 changer transitions 0/212 dead transitions. [2024-06-14 14:07:38,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 212 transitions, 2547 flow [2024-06-14 14:07:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-14 14:07:38,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 14:07:38,088 INFO L175 Difference]: Start difference. First operand has 128 places, 172 transitions, 1791 flow. Second operand 10 states and 265 transitions. [2024-06-14 14:07:38,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 212 transitions, 2547 flow [2024-06-14 14:07:38,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 212 transitions, 2309 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:38,147 INFO L231 Difference]: Finished difference. Result has 132 places, 172 transitions, 1740 flow [2024-06-14 14:07:38,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1740, PETRI_PLACES=132, PETRI_TRANSITIONS=172} [2024-06-14 14:07:38,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-14 14:07:38,147 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 172 transitions, 1740 flow [2024-06-14 14:07:38,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:38,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:38,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:38,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:07:38,148 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)] === [2024-06-14 14:07:38,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash 95195783, now seen corresponding path program 6 times [2024-06-14 14:07:38,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:38,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146492198] [2024-06-14 14:07:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:38,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:38,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:38,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146492198] [2024-06-14 14:07:38,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146492198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:38,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:38,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:38,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963784866] [2024-06-14 14:07:38,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:38,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:38,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:38,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:38,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:38,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 172 transitions, 1740 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:38,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:38,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:38,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:38,713 INFO L124 PetriNetUnfolderBase]: 1254/2190 cut-off events. [2024-06-14 14:07:38,713 INFO L125 PetriNetUnfolderBase]: For 52159/52159 co-relation queries the response was YES. [2024-06-14 14:07:38,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12988 conditions, 2190 events. 1254/2190 cut-off events. For 52159/52159 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12505 event pairs, 260 based on Foata normal form. 3/2192 useless extension candidates. Maximal degree in co-relation 12928. Up to 1786 conditions per place. [2024-06-14 14:07:38,730 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 159 selfloop transitions, 37 changer transitions 0/205 dead transitions. [2024-06-14 14:07:38,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 205 transitions, 2377 flow [2024-06-14 14:07:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:07:38,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-14 14:07:38,731 INFO L175 Difference]: Start difference. First operand has 132 places, 172 transitions, 1740 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:07:38,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 205 transitions, 2377 flow [2024-06-14 14:07:38,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 205 transitions, 2167 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:38,793 INFO L231 Difference]: Finished difference. Result has 132 places, 184 transitions, 1799 flow [2024-06-14 14:07:38,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1799, PETRI_PLACES=132, PETRI_TRANSITIONS=184} [2024-06-14 14:07:38,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-14 14:07:38,796 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 184 transitions, 1799 flow [2024-06-14 14:07:38,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:38,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:38,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:38,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:07:38,797 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)] === [2024-06-14 14:07:38,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:38,797 INFO L85 PathProgramCache]: Analyzing trace with hash 448523623, now seen corresponding path program 2 times [2024-06-14 14:07:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:38,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959052232] [2024-06-14 14:07:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:38,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:39,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959052232] [2024-06-14 14:07:39,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959052232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:39,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:39,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:39,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832695743] [2024-06-14 14:07:39,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:39,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:39,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:39,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 184 transitions, 1799 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:39,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:39,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:39,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:39,385 INFO L124 PetriNetUnfolderBase]: 1279/2223 cut-off events. [2024-06-14 14:07:39,385 INFO L125 PetriNetUnfolderBase]: For 56853/56853 co-relation queries the response was YES. [2024-06-14 14:07:39,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13168 conditions, 2223 events. 1279/2223 cut-off events. For 56853/56853 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12672 event pairs, 267 based on Foata normal form. 6/2224 useless extension candidates. Maximal degree in co-relation 13106. Up to 1742 conditions per place. [2024-06-14 14:07:39,402 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 154 selfloop transitions, 58 changer transitions 0/221 dead transitions. [2024-06-14 14:07:39,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 221 transitions, 2485 flow [2024-06-14 14:07:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-14 14:07:39,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934343434343434 [2024-06-14 14:07:39,403 INFO L175 Difference]: Start difference. First operand has 132 places, 184 transitions, 1799 flow. Second operand 9 states and 235 transitions. [2024-06-14 14:07:39,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 221 transitions, 2485 flow [2024-06-14 14:07:39,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 221 transitions, 2407 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:39,463 INFO L231 Difference]: Finished difference. Result has 137 places, 187 transitions, 1917 flow [2024-06-14 14:07:39,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1917, PETRI_PLACES=137, PETRI_TRANSITIONS=187} [2024-06-14 14:07:39,464 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-14 14:07:39,464 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 187 transitions, 1917 flow [2024-06-14 14:07:39,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:39,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:39,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:39,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:07:39,464 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)] === [2024-06-14 14:07:39,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1495113813, now seen corresponding path program 3 times [2024-06-14 14:07:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:39,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757518807] [2024-06-14 14:07:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:39,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757518807] [2024-06-14 14:07:39,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757518807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:39,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:39,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:39,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641396645] [2024-06-14 14:07:39,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:39,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:39,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:39,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:39,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:39,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:39,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 187 transitions, 1917 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:39,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:39,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:39,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:40,058 INFO L124 PetriNetUnfolderBase]: 1307/2283 cut-off events. [2024-06-14 14:07:40,058 INFO L125 PetriNetUnfolderBase]: For 62127/62127 co-relation queries the response was YES. [2024-06-14 14:07:40,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13828 conditions, 2283 events. 1307/2283 cut-off events. For 62127/62127 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13101 event pairs, 265 based on Foata normal form. 6/2288 useless extension candidates. Maximal degree in co-relation 13765. Up to 1881 conditions per place. [2024-06-14 14:07:40,074 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 175 selfloop transitions, 28 changer transitions 0/212 dead transitions. [2024-06-14 14:07:40,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 212 transitions, 2507 flow [2024-06-14 14:07:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:07:40,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 14:07:40,075 INFO L175 Difference]: Start difference. First operand has 137 places, 187 transitions, 1917 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:07:40,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 212 transitions, 2507 flow [2024-06-14 14:07:40,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 212 transitions, 2335 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:40,133 INFO L231 Difference]: Finished difference. Result has 137 places, 190 transitions, 1887 flow [2024-06-14 14:07:40,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1887, PETRI_PLACES=137, PETRI_TRANSITIONS=190} [2024-06-14 14:07:40,133 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-14 14:07:40,134 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 190 transitions, 1887 flow [2024-06-14 14:07:40,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:40,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:40,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:40,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:07:40,134 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)] === [2024-06-14 14:07:40,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash 105680231, now seen corresponding path program 4 times [2024-06-14 14:07:40,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:40,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580972093] [2024-06-14 14:07:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:40,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:40,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:40,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580972093] [2024-06-14 14:07:40,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580972093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:40,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:40,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:40,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126319806] [2024-06-14 14:07:40,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:40,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:40,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:40,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:40,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:40,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:40,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 190 transitions, 1887 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:40,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:40,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:40,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:40,809 INFO L124 PetriNetUnfolderBase]: 1336/2336 cut-off events. [2024-06-14 14:07:40,809 INFO L125 PetriNetUnfolderBase]: For 66193/66193 co-relation queries the response was YES. [2024-06-14 14:07:40,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14264 conditions, 2336 events. 1336/2336 cut-off events. For 66193/66193 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13500 event pairs, 252 based on Foata normal form. 6/2341 useless extension candidates. Maximal degree in co-relation 14200. Up to 1840 conditions per place. [2024-06-14 14:07:40,825 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 184 selfloop transitions, 30 changer transitions 0/223 dead transitions. [2024-06-14 14:07:40,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 223 transitions, 2637 flow [2024-06-14 14:07:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 14:07:40,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038961038961039 [2024-06-14 14:07:40,826 INFO L175 Difference]: Start difference. First operand has 137 places, 190 transitions, 1887 flow. Second operand 7 states and 186 transitions. [2024-06-14 14:07:40,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 223 transitions, 2637 flow [2024-06-14 14:07:40,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 223 transitions, 2519 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:40,895 INFO L231 Difference]: Finished difference. Result has 140 places, 196 transitions, 1992 flow [2024-06-14 14:07:40,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1992, PETRI_PLACES=140, PETRI_TRANSITIONS=196} [2024-06-14 14:07:40,895 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 14:07:40,896 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 196 transitions, 1992 flow [2024-06-14 14:07:40,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:40,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:40,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:40,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:07:40,896 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:40,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:40,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1186097194, now seen corresponding path program 1 times [2024-06-14 14:07:40,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:40,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139756217] [2024-06-14 14:07:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:40,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:41,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:41,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139756217] [2024-06-14 14:07:41,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139756217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:41,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:41,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:07:41,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040256359] [2024-06-14 14:07:41,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:41,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:07:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:07:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:07:41,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:07:41,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 196 transitions, 1992 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:41,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:41,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:07:41,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:41,425 INFO L124 PetriNetUnfolderBase]: 1260/2262 cut-off events. [2024-06-14 14:07:41,425 INFO L125 PetriNetUnfolderBase]: For 69010/69010 co-relation queries the response was YES. [2024-06-14 14:07:41,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14045 conditions, 2262 events. 1260/2262 cut-off events. For 69010/69010 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13401 event pairs, 279 based on Foata normal form. 2/2257 useless extension candidates. Maximal degree in co-relation 13979. Up to 1748 conditions per place. [2024-06-14 14:07:41,442 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 162 selfloop transitions, 24 changer transitions 0/215 dead transitions. [2024-06-14 14:07:41,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 215 transitions, 2490 flow [2024-06-14 14:07:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:07:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:07:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-14 14:07:41,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-14 14:07:41,443 INFO L175 Difference]: Start difference. First operand has 140 places, 196 transitions, 1992 flow. Second operand 5 states and 140 transitions. [2024-06-14 14:07:41,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 215 transitions, 2490 flow [2024-06-14 14:07:41,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 215 transitions, 2370 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:41,519 INFO L231 Difference]: Finished difference. Result has 142 places, 199 transitions, 1951 flow [2024-06-14 14:07:41,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1951, PETRI_PLACES=142, PETRI_TRANSITIONS=199} [2024-06-14 14:07:41,519 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 97 predicate places. [2024-06-14 14:07:41,519 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 199 transitions, 1951 flow [2024-06-14 14:07:41,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:41,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:41,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:41,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:07:41,520 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:41,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:41,520 INFO L85 PathProgramCache]: Analyzing trace with hash 310292548, now seen corresponding path program 2 times [2024-06-14 14:07:41,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:41,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251998549] [2024-06-14 14:07:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:41,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:41,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:41,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251998549] [2024-06-14 14:07:41,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251998549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:41,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:41,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:41,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768043237] [2024-06-14 14:07:41,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:41,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:41,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:41,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:41,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:07:41,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 199 transitions, 1951 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:41,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:41,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:07:41,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:42,075 INFO L124 PetriNetUnfolderBase]: 1256/2239 cut-off events. [2024-06-14 14:07:42,076 INFO L125 PetriNetUnfolderBase]: For 69093/69093 co-relation queries the response was YES. [2024-06-14 14:07:42,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13767 conditions, 2239 events. 1256/2239 cut-off events. For 69093/69093 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13246 event pairs, 282 based on Foata normal form. 2/2231 useless extension candidates. Maximal degree in co-relation 13699. Up to 1743 conditions per place. [2024-06-14 14:07:42,091 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 156 selfloop transitions, 24 changer transitions 0/209 dead transitions. [2024-06-14 14:07:42,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 209 transitions, 2335 flow [2024-06-14 14:07:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 14:07:42,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:07:42,093 INFO L175 Difference]: Start difference. First operand has 142 places, 199 transitions, 1951 flow. Second operand 6 states and 154 transitions. [2024-06-14 14:07:42,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 209 transitions, 2335 flow [2024-06-14 14:07:42,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 209 transitions, 2271 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:42,176 INFO L231 Difference]: Finished difference. Result has 145 places, 199 transitions, 1941 flow [2024-06-14 14:07:42,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1941, PETRI_PLACES=145, PETRI_TRANSITIONS=199} [2024-06-14 14:07:42,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-14 14:07:42,177 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 199 transitions, 1941 flow [2024-06-14 14:07:42,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:42,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:42,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:42,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:07:42,177 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:42,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:42,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2113771740, now seen corresponding path program 1 times [2024-06-14 14:07:42,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:42,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290519344] [2024-06-14 14:07:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:42,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290519344] [2024-06-14 14:07:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290519344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:42,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567120936] [2024-06-14 14:07:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:42,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:42,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 199 transitions, 1941 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:42,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:42,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:42,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:42,790 INFO L124 PetriNetUnfolderBase]: 1327/2325 cut-off events. [2024-06-14 14:07:42,790 INFO L125 PetriNetUnfolderBase]: For 71589/71589 co-relation queries the response was YES. [2024-06-14 14:07:42,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14244 conditions, 2325 events. 1327/2325 cut-off events. For 71589/71589 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13445 event pairs, 271 based on Foata normal form. 2/2326 useless extension candidates. Maximal degree in co-relation 14176. Up to 1940 conditions per place. [2024-06-14 14:07:42,806 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 181 selfloop transitions, 25 changer transitions 0/215 dead transitions. [2024-06-14 14:07:42,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 215 transitions, 2393 flow [2024-06-14 14:07:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 14:07:42,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871212121212122 [2024-06-14 14:07:42,807 INFO L175 Difference]: Start difference. First operand has 145 places, 199 transitions, 1941 flow. Second operand 6 states and 155 transitions. [2024-06-14 14:07:42,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 215 transitions, 2393 flow [2024-06-14 14:07:42,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 215 transitions, 2320 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:42,901 INFO L231 Difference]: Finished difference. Result has 146 places, 199 transitions, 1932 flow [2024-06-14 14:07:42,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1932, PETRI_PLACES=146, PETRI_TRANSITIONS=199} [2024-06-14 14:07:42,902 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-14 14:07:42,902 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 199 transitions, 1932 flow [2024-06-14 14:07:42,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:42,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:42,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:42,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:07:42,902 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:42,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:42,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1757998208, now seen corresponding path program 2 times [2024-06-14 14:07:42,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:42,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795687791] [2024-06-14 14:07:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:42,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:43,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:43,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795687791] [2024-06-14 14:07:43,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795687791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:43,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:43,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:43,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706378558] [2024-06-14 14:07:43,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:43,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:43,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:43,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:43,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 199 transitions, 1932 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:43,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:43,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:43,517 INFO L124 PetriNetUnfolderBase]: 1345/2349 cut-off events. [2024-06-14 14:07:43,517 INFO L125 PetriNetUnfolderBase]: For 75736/75736 co-relation queries the response was YES. [2024-06-14 14:07:43,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14537 conditions, 2349 events. 1345/2349 cut-off events. For 75736/75736 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13614 event pairs, 277 based on Foata normal form. 2/2346 useless extension candidates. Maximal degree in co-relation 14468. Up to 1862 conditions per place. [2024-06-14 14:07:43,536 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 155 selfloop transitions, 62 changer transitions 0/226 dead transitions. [2024-06-14 14:07:43,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 226 transitions, 2625 flow [2024-06-14 14:07:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:43,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:07:43,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-14 14:07:43,537 INFO L175 Difference]: Start difference. First operand has 146 places, 199 transitions, 1932 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:07:43,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 226 transitions, 2625 flow [2024-06-14 14:07:43,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 226 transitions, 2575 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:43,653 INFO L231 Difference]: Finished difference. Result has 149 places, 206 transitions, 2091 flow [2024-06-14 14:07:43,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2091, PETRI_PLACES=149, PETRI_TRANSITIONS=206} [2024-06-14 14:07:43,654 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 104 predicate places. [2024-06-14 14:07:43,654 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 206 transitions, 2091 flow [2024-06-14 14:07:43,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:43,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:43,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:07:43,654 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:43,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:43,655 INFO L85 PathProgramCache]: Analyzing trace with hash 964869228, now seen corresponding path program 1 times [2024-06-14 14:07:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:43,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155818622] [2024-06-14 14:07:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:43,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:43,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:43,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155818622] [2024-06-14 14:07:43,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155818622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:43,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:43,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:43,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638186256] [2024-06-14 14:07:43,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:43,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:43,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:43,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:43,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:43,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:43,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 206 transitions, 2091 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:43,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:43,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:44,200 INFO L124 PetriNetUnfolderBase]: 1355/2365 cut-off events. [2024-06-14 14:07:44,200 INFO L125 PetriNetUnfolderBase]: For 79896/79896 co-relation queries the response was YES. [2024-06-14 14:07:44,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14883 conditions, 2365 events. 1355/2365 cut-off events. For 79896/79896 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13714 event pairs, 281 based on Foata normal form. 2/2360 useless extension candidates. Maximal degree in co-relation 14813. Up to 1911 conditions per place. [2024-06-14 14:07:44,219 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 187 selfloop transitions, 39 changer transitions 0/235 dead transitions. [2024-06-14 14:07:44,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 235 transitions, 2791 flow [2024-06-14 14:07:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:44,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 14:07:44,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:07:44,220 INFO L175 Difference]: Start difference. First operand has 149 places, 206 transitions, 2091 flow. Second operand 6 states and 156 transitions. [2024-06-14 14:07:44,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 235 transitions, 2791 flow [2024-06-14 14:07:44,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 235 transitions, 2671 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:44,310 INFO L231 Difference]: Finished difference. Result has 151 places, 220 transitions, 2216 flow [2024-06-14 14:07:44,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2216, PETRI_PLACES=151, PETRI_TRANSITIONS=220} [2024-06-14 14:07:44,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-14 14:07:44,311 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 220 transitions, 2216 flow [2024-06-14 14:07:44,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:44,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:44,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:44,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:07:44,311 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:44,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash 25559098, now seen corresponding path program 3 times [2024-06-14 14:07:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268747204] [2024-06-14 14:07:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:44,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:44,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268747204] [2024-06-14 14:07:44,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268747204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:44,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:44,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:44,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580699544] [2024-06-14 14:07:44,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:44,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:44,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:44,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:44,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:44,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 220 transitions, 2216 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:44,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:44,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:44,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:44,908 INFO L124 PetriNetUnfolderBase]: 1349/2350 cut-off events. [2024-06-14 14:07:44,908 INFO L125 PetriNetUnfolderBase]: For 83411/83411 co-relation queries the response was YES. [2024-06-14 14:07:44,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15007 conditions, 2350 events. 1349/2350 cut-off events. For 83411/83411 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13604 event pairs, 288 based on Foata normal form. 2/2347 useless extension candidates. Maximal degree in co-relation 14936. Up to 1871 conditions per place. [2024-06-14 14:07:44,926 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 163 selfloop transitions, 65 changer transitions 0/237 dead transitions. [2024-06-14 14:07:44,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 237 transitions, 2856 flow [2024-06-14 14:07:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:07:44,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 14:07:44,927 INFO L175 Difference]: Start difference. First operand has 151 places, 220 transitions, 2216 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:07:44,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 237 transitions, 2856 flow [2024-06-14 14:07:45,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 237 transitions, 2794 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-14 14:07:45,026 INFO L231 Difference]: Finished difference. Result has 158 places, 220 transitions, 2291 flow [2024-06-14 14:07:45,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2291, PETRI_PLACES=158, PETRI_TRANSITIONS=220} [2024-06-14 14:07:45,026 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-14 14:07:45,026 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 220 transitions, 2291 flow [2024-06-14 14:07:45,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:45,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:45,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:45,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:07:45,027 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:45,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:45,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1192770378, now seen corresponding path program 2 times [2024-06-14 14:07:45,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:45,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296761720] [2024-06-14 14:07:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:45,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:45,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:45,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296761720] [2024-06-14 14:07:45,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296761720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:45,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:45,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340500751] [2024-06-14 14:07:45,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:45,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:45,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:45,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:45,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:45,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:45,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 220 transitions, 2291 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:45,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:45,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:45,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:45,549 INFO L124 PetriNetUnfolderBase]: 1367/2380 cut-off events. [2024-06-14 14:07:45,550 INFO L125 PetriNetUnfolderBase]: For 88579/88579 co-relation queries the response was YES. [2024-06-14 14:07:45,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15453 conditions, 2380 events. 1367/2380 cut-off events. For 88579/88579 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13806 event pairs, 293 based on Foata normal form. 2/2377 useless extension candidates. Maximal degree in co-relation 15379. Up to 1922 conditions per place. [2024-06-14 14:07:45,569 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 184 selfloop transitions, 48 changer transitions 0/241 dead transitions. [2024-06-14 14:07:45,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 241 transitions, 3050 flow [2024-06-14 14:07:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 14:07:45,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:07:45,577 INFO L175 Difference]: Start difference. First operand has 158 places, 220 transitions, 2291 flow. Second operand 6 states and 156 transitions. [2024-06-14 14:07:45,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 241 transitions, 3050 flow [2024-06-14 14:07:45,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 241 transitions, 2902 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:45,698 INFO L231 Difference]: Finished difference. Result has 158 places, 229 transitions, 2367 flow [2024-06-14 14:07:45,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2367, PETRI_PLACES=158, PETRI_TRANSITIONS=229} [2024-06-14 14:07:45,699 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-14 14:07:45,699 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 229 transitions, 2367 flow [2024-06-14 14:07:45,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:45,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:45,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:45,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:07:45,699 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:45,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash -417101920, now seen corresponding path program 3 times [2024-06-14 14:07:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:45,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034161639] [2024-06-14 14:07:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:45,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:45,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034161639] [2024-06-14 14:07:45,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034161639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:45,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:45,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:45,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087833611] [2024-06-14 14:07:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:45,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:45,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:45,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:45,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:45,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 229 transitions, 2367 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:45,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:45,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:45,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:46,266 INFO L124 PetriNetUnfolderBase]: 1361/2372 cut-off events. [2024-06-14 14:07:46,267 INFO L125 PetriNetUnfolderBase]: For 91064/91064 co-relation queries the response was YES. [2024-06-14 14:07:46,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15401 conditions, 2372 events. 1361/2372 cut-off events. For 91064/91064 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13791 event pairs, 293 based on Foata normal form. 2/2369 useless extension candidates. Maximal degree in co-relation 15326. Up to 1917 conditions per place. [2024-06-14 14:07:46,283 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 181 selfloop transitions, 50 changer transitions 0/240 dead transitions. [2024-06-14 14:07:46,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 240 transitions, 2931 flow [2024-06-14 14:07:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 14:07:46,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:07:46,284 INFO L175 Difference]: Start difference. First operand has 158 places, 229 transitions, 2367 flow. Second operand 6 states and 154 transitions. [2024-06-14 14:07:46,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 240 transitions, 2931 flow [2024-06-14 14:07:46,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 240 transitions, 2861 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-14 14:07:46,413 INFO L231 Difference]: Finished difference. Result has 164 places, 229 transitions, 2404 flow [2024-06-14 14:07:46,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2404, PETRI_PLACES=164, PETRI_TRANSITIONS=229} [2024-06-14 14:07:46,414 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-14 14:07:46,414 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 229 transitions, 2404 flow [2024-06-14 14:07:46,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:46,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:46,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:46,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:07:46,415 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:46,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:46,415 INFO L85 PathProgramCache]: Analyzing trace with hash -417091008, now seen corresponding path program 1 times [2024-06-14 14:07:46,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:46,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183909278] [2024-06-14 14:07:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:46,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:46,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:46,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183909278] [2024-06-14 14:07:46,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183909278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:46,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:46,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:46,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948748452] [2024-06-14 14:07:46,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:46,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:46,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:46,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:07:46,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 229 transitions, 2404 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:46,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:46,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:07:46,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:46,956 INFO L124 PetriNetUnfolderBase]: 1322/2342 cut-off events. [2024-06-14 14:07:46,957 INFO L125 PetriNetUnfolderBase]: For 100974/100974 co-relation queries the response was YES. [2024-06-14 14:07:46,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15211 conditions, 2342 events. 1322/2342 cut-off events. For 100974/100974 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13909 event pairs, 281 based on Foata normal form. 12/2341 useless extension candidates. Maximal degree in co-relation 15133. Up to 1771 conditions per place. [2024-06-14 14:07:46,977 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 176 selfloop transitions, 32 changer transitions 0/245 dead transitions. [2024-06-14 14:07:46,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 245 transitions, 2900 flow [2024-06-14 14:07:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:07:46,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 14:07:46,979 INFO L175 Difference]: Start difference. First operand has 164 places, 229 transitions, 2404 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:07:46,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 245 transitions, 2900 flow [2024-06-14 14:07:47,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 245 transitions, 2795 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:47,100 INFO L231 Difference]: Finished difference. Result has 166 places, 231 transitions, 2406 flow [2024-06-14 14:07:47,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2406, PETRI_PLACES=166, PETRI_TRANSITIONS=231} [2024-06-14 14:07:47,101 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-14 14:07:47,101 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 231 transitions, 2406 flow [2024-06-14 14:07:47,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:47,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:47,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:47,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:07:47,101 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)] === [2024-06-14 14:07:47,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash -586807710, now seen corresponding path program 1 times [2024-06-14 14:07:47,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:47,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585549162] [2024-06-14 14:07:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:47,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:47,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:47,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585549162] [2024-06-14 14:07:47,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585549162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:47,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:47,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:47,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284472209] [2024-06-14 14:07:47,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:47,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:47,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:47,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:47,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 231 transitions, 2406 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:47,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:47,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:47,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:47,804 INFO L124 PetriNetUnfolderBase]: 1585/2732 cut-off events. [2024-06-14 14:07:47,804 INFO L125 PetriNetUnfolderBase]: For 133211/133211 co-relation queries the response was YES. [2024-06-14 14:07:47,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18835 conditions, 2732 events. 1585/2732 cut-off events. For 133211/133211 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16267 event pairs, 228 based on Foata normal form. 18/2744 useless extension candidates. Maximal degree in co-relation 18756. Up to 1959 conditions per place. [2024-06-14 14:07:47,826 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 237 selfloop transitions, 36 changer transitions 0/282 dead transitions. [2024-06-14 14:07:47,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 282 transitions, 3368 flow [2024-06-14 14:07:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-14 14:07:47,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-06-14 14:07:47,827 INFO L175 Difference]: Start difference. First operand has 166 places, 231 transitions, 2406 flow. Second operand 9 states and 246 transitions. [2024-06-14 14:07:47,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 282 transitions, 3368 flow [2024-06-14 14:07:48,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 282 transitions, 3285 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:48,078 INFO L231 Difference]: Finished difference. Result has 171 places, 235 transitions, 2546 flow [2024-06-14 14:07:48,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2546, PETRI_PLACES=171, PETRI_TRANSITIONS=235} [2024-06-14 14:07:48,079 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-14 14:07:48,079 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 235 transitions, 2546 flow [2024-06-14 14:07:48,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:48,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:48,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:48,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:07:48,080 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)] === [2024-06-14 14:07:48,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:48,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2051794872, now seen corresponding path program 2 times [2024-06-14 14:07:48,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:48,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467897630] [2024-06-14 14:07:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:48,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:48,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:48,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467897630] [2024-06-14 14:07:48,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467897630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:48,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:48,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:48,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606636385] [2024-06-14 14:07:48,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:48,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:48,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:48,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:48,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:48,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 235 transitions, 2546 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:48,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:48,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:48,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:48,860 INFO L124 PetriNetUnfolderBase]: 1646/2851 cut-off events. [2024-06-14 14:07:48,860 INFO L125 PetriNetUnfolderBase]: For 141624/141624 co-relation queries the response was YES. [2024-06-14 14:07:48,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19807 conditions, 2851 events. 1646/2851 cut-off events. For 141624/141624 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17104 event pairs, 317 based on Foata normal form. 18/2863 useless extension candidates. Maximal degree in co-relation 19727. Up to 2143 conditions per place. [2024-06-14 14:07:48,886 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 239 selfloop transitions, 31 changer transitions 0/279 dead transitions. [2024-06-14 14:07:48,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 279 transitions, 3428 flow [2024-06-14 14:07:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-14 14:07:48,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6278409090909091 [2024-06-14 14:07:48,887 INFO L175 Difference]: Start difference. First operand has 171 places, 235 transitions, 2546 flow. Second operand 8 states and 221 transitions. [2024-06-14 14:07:48,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 279 transitions, 3428 flow [2024-06-14 14:07:49,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 279 transitions, 3330 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:49,090 INFO L231 Difference]: Finished difference. Result has 174 places, 237 transitions, 2591 flow [2024-06-14 14:07:49,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2591, PETRI_PLACES=174, PETRI_TRANSITIONS=237} [2024-06-14 14:07:49,091 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-14 14:07:49,091 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 237 transitions, 2591 flow [2024-06-14 14:07:49,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:49,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:49,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:49,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:07:49,092 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)] === [2024-06-14 14:07:49,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1948123788, now seen corresponding path program 3 times [2024-06-14 14:07:49,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:49,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969460827] [2024-06-14 14:07:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:49,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:49,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:49,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969460827] [2024-06-14 14:07:49,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969460827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:49,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:49,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:49,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337825152] [2024-06-14 14:07:49,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:49,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:49,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:49,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:49,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:49,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 237 transitions, 2591 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:49,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:49,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:49,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:49,791 INFO L124 PetriNetUnfolderBase]: 1600/2781 cut-off events. [2024-06-14 14:07:49,791 INFO L125 PetriNetUnfolderBase]: For 132799/132799 co-relation queries the response was YES. [2024-06-14 14:07:49,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18322 conditions, 2781 events. 1600/2781 cut-off events. For 132799/132799 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16640 event pairs, 314 based on Foata normal form. 24/2799 useless extension candidates. Maximal degree in co-relation 18240. Up to 2244 conditions per place. [2024-06-14 14:07:49,814 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 238 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-14 14:07:49,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 274 transitions, 3233 flow [2024-06-14 14:07:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-14 14:07:49,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-14 14:07:49,815 INFO L175 Difference]: Start difference. First operand has 174 places, 237 transitions, 2591 flow. Second operand 8 states and 216 transitions. [2024-06-14 14:07:49,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 274 transitions, 3233 flow [2024-06-14 14:07:50,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 274 transitions, 3091 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:50,017 INFO L231 Difference]: Finished difference. Result has 176 places, 237 transitions, 2511 flow [2024-06-14 14:07:50,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2511, PETRI_PLACES=176, PETRI_TRANSITIONS=237} [2024-06-14 14:07:50,017 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-14 14:07:50,017 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 237 transitions, 2511 flow [2024-06-14 14:07:50,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:50,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:50,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:50,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:07:50,018 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)] === [2024-06-14 14:07:50,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:50,018 INFO L85 PathProgramCache]: Analyzing trace with hash 31495334, now seen corresponding path program 4 times [2024-06-14 14:07:50,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:50,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762672267] [2024-06-14 14:07:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:50,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:50,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762672267] [2024-06-14 14:07:50,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762672267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:50,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:50,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:50,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038888153] [2024-06-14 14:07:50,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:50,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:50,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:50,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:50,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:50,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:50,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 237 transitions, 2511 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:50,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:50,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:50,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:50,879 INFO L124 PetriNetUnfolderBase]: 1686/2930 cut-off events. [2024-06-14 14:07:50,879 INFO L125 PetriNetUnfolderBase]: For 137466/137466 co-relation queries the response was YES. [2024-06-14 14:07:50,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18907 conditions, 2930 events. 1686/2930 cut-off events. For 137466/137466 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17816 event pairs, 341 based on Foata normal form. 24/2944 useless extension candidates. Maximal degree in co-relation 18824. Up to 2113 conditions per place. [2024-06-14 14:07:50,901 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 170 selfloop transitions, 113 changer transitions 0/292 dead transitions. [2024-06-14 14:07:50,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 292 transitions, 3559 flow [2024-06-14 14:07:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2024-06-14 14:07:50,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-14 14:07:50,903 INFO L175 Difference]: Start difference. First operand has 176 places, 237 transitions, 2511 flow. Second operand 12 states and 320 transitions. [2024-06-14 14:07:50,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 292 transitions, 3559 flow [2024-06-14 14:07:51,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 292 transitions, 3497 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:51,054 INFO L231 Difference]: Finished difference. Result has 181 places, 239 transitions, 2761 flow [2024-06-14 14:07:51,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2761, PETRI_PLACES=181, PETRI_TRANSITIONS=239} [2024-06-14 14:07:51,054 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-14 14:07:51,054 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 239 transitions, 2761 flow [2024-06-14 14:07:51,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:51,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:51,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:07:51,055 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)] === [2024-06-14 14:07:51,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1914705898, now seen corresponding path program 5 times [2024-06-14 14:07:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:51,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549253867] [2024-06-14 14:07:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:51,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:51,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549253867] [2024-06-14 14:07:51,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549253867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:51,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:51,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:51,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982842730] [2024-06-14 14:07:51,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:51,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:51,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:51,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:51,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:51,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:51,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 239 transitions, 2761 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:51,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:51,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:51,932 INFO L124 PetriNetUnfolderBase]: 1879/3259 cut-off events. [2024-06-14 14:07:51,933 INFO L125 PetriNetUnfolderBase]: For 168203/168203 co-relation queries the response was YES. [2024-06-14 14:07:51,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22612 conditions, 3259 events. 1879/3259 cut-off events. For 168203/168203 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20272 event pairs, 379 based on Foata normal form. 18/3267 useless extension candidates. Maximal degree in co-relation 22528. Up to 2133 conditions per place. [2024-06-14 14:07:51,963 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 172 selfloop transitions, 120 changer transitions 0/301 dead transitions. [2024-06-14 14:07:51,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 301 transitions, 4083 flow [2024-06-14 14:07:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 324 transitions. [2024-06-14 14:07:51,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-14 14:07:51,965 INFO L175 Difference]: Start difference. First operand has 181 places, 239 transitions, 2761 flow. Second operand 12 states and 324 transitions. [2024-06-14 14:07:51,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 301 transitions, 4083 flow [2024-06-14 14:07:52,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 301 transitions, 3815 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:52,198 INFO L231 Difference]: Finished difference. Result has 183 places, 243 transitions, 2900 flow [2024-06-14 14:07:52,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2900, PETRI_PLACES=183, PETRI_TRANSITIONS=243} [2024-06-14 14:07:52,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-14 14:07:52,199 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 243 transitions, 2900 flow [2024-06-14 14:07:52,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:52,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:52,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:52,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:07:52,200 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)] === [2024-06-14 14:07:52,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2142784678, now seen corresponding path program 6 times [2024-06-14 14:07:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:52,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330423648] [2024-06-14 14:07:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:52,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:52,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:52,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330423648] [2024-06-14 14:07:52,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330423648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:52,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:52,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:52,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759915004] [2024-06-14 14:07:52,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:52,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:52,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:52,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:52,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 243 transitions, 2900 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:52,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:52,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:52,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:52,951 INFO L124 PetriNetUnfolderBase]: 1833/3189 cut-off events. [2024-06-14 14:07:52,951 INFO L125 PetriNetUnfolderBase]: For 156744/156744 co-relation queries the response was YES. [2024-06-14 14:07:52,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21097 conditions, 3189 events. 1833/3189 cut-off events. For 156744/156744 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19787 event pairs, 376 based on Foata normal form. 24/3203 useless extension candidates. Maximal degree in co-relation 21012. Up to 2358 conditions per place. [2024-06-14 14:07:52,979 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 167 selfloop transitions, 112 changer transitions 0/288 dead transitions. [2024-06-14 14:07:52,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 288 transitions, 3858 flow [2024-06-14 14:07:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-06-14 14:07:52,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6181818181818182 [2024-06-14 14:07:52,980 INFO L175 Difference]: Start difference. First operand has 183 places, 243 transitions, 2900 flow. Second operand 10 states and 272 transitions. [2024-06-14 14:07:52,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 288 transitions, 3858 flow [2024-06-14 14:07:53,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 288 transitions, 3603 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:53,220 INFO L231 Difference]: Finished difference. Result has 185 places, 243 transitions, 2877 flow [2024-06-14 14:07:53,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2877, PETRI_PLACES=185, PETRI_TRANSITIONS=243} [2024-06-14 14:07:53,220 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2024-06-14 14:07:53,220 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 243 transitions, 2877 flow [2024-06-14 14:07:53,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:53,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:53,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:53,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:07:53,221 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)] === [2024-06-14 14:07:53,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1507063562, now seen corresponding path program 1 times [2024-06-14 14:07:53,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:53,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922280442] [2024-06-14 14:07:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:53,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:53,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922280442] [2024-06-14 14:07:53,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922280442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:53,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:53,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:53,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545048375] [2024-06-14 14:07:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:53,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:53,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:53,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:53,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 243 transitions, 2877 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:53,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:53,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:53,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:53,995 INFO L124 PetriNetUnfolderBase]: 1894/3288 cut-off events. [2024-06-14 14:07:53,995 INFO L125 PetriNetUnfolderBase]: For 154619/154619 co-relation queries the response was YES. [2024-06-14 14:07:54,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21610 conditions, 3288 events. 1894/3288 cut-off events. For 154619/154619 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20504 event pairs, 367 based on Foata normal form. 18/3292 useless extension candidates. Maximal degree in co-relation 21523. Up to 2096 conditions per place. [2024-06-14 14:07:54,027 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 164 selfloop transitions, 120 changer transitions 0/293 dead transitions. [2024-06-14 14:07:54,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 293 transitions, 3951 flow [2024-06-14 14:07:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-06-14 14:07:54,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-14 14:07:54,028 INFO L175 Difference]: Start difference. First operand has 185 places, 243 transitions, 2877 flow. Second operand 10 states and 274 transitions. [2024-06-14 14:07:54,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 293 transitions, 3951 flow [2024-06-14 14:07:54,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 293 transitions, 3711 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:54,229 INFO L231 Difference]: Finished difference. Result has 186 places, 245 transitions, 2970 flow [2024-06-14 14:07:54,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2637, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2970, PETRI_PLACES=186, PETRI_TRANSITIONS=245} [2024-06-14 14:07:54,229 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-14 14:07:54,230 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 245 transitions, 2970 flow [2024-06-14 14:07:54,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:54,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:54,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:54,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:07:54,230 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)] === [2024-06-14 14:07:54,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1429051912, now seen corresponding path program 7 times [2024-06-14 14:07:54,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:54,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265661751] [2024-06-14 14:07:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:54,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:54,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265661751] [2024-06-14 14:07:54,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265661751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:54,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:54,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:54,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151597504] [2024-06-14 14:07:54,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:54,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:54,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:54,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:54,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:54,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:54,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 245 transitions, 2970 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:54,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:54,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:54,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:55,020 INFO L124 PetriNetUnfolderBase]: 1980/3446 cut-off events. [2024-06-14 14:07:55,020 INFO L125 PetriNetUnfolderBase]: For 171294/171294 co-relation queries the response was YES. [2024-06-14 14:07:55,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22949 conditions, 3446 events. 1980/3446 cut-off events. For 171294/171294 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21919 event pairs, 416 based on Foata normal form. 24/3462 useless extension candidates. Maximal degree in co-relation 22861. Up to 2603 conditions per place. [2024-06-14 14:07:55,050 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 176 selfloop transitions, 104 changer transitions 0/289 dead transitions. [2024-06-14 14:07:55,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 289 transitions, 4020 flow [2024-06-14 14:07:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-06-14 14:07:55,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-06-14 14:07:55,051 INFO L175 Difference]: Start difference. First operand has 186 places, 245 transitions, 2970 flow. Second operand 10 states and 268 transitions. [2024-06-14 14:07:55,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 289 transitions, 4020 flow [2024-06-14 14:07:55,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 289 transitions, 3723 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:55,337 INFO L231 Difference]: Finished difference. Result has 188 places, 247 transitions, 2979 flow [2024-06-14 14:07:55,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2979, PETRI_PLACES=188, PETRI_TRANSITIONS=247} [2024-06-14 14:07:55,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-14 14:07:55,337 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 247 transitions, 2979 flow [2024-06-14 14:07:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:55,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:55,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:55,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:07:55,338 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)] === [2024-06-14 14:07:55,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash -585347930, now seen corresponding path program 8 times [2024-06-14 14:07:55,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:55,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932010858] [2024-06-14 14:07:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:55,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:55,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:55,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932010858] [2024-06-14 14:07:55,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932010858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:55,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:55,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730214758] [2024-06-14 14:07:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:55,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:55,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:55,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:55,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 247 transitions, 2979 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:55,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:55,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:55,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:56,183 INFO L124 PetriNetUnfolderBase]: 2066/3599 cut-off events. [2024-06-14 14:07:56,184 INFO L125 PetriNetUnfolderBase]: For 180927/180927 co-relation queries the response was YES. [2024-06-14 14:07:56,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23839 conditions, 3599 events. 2066/3599 cut-off events. For 180927/180927 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23081 event pairs, 434 based on Foata normal form. 24/3615 useless extension candidates. Maximal degree in co-relation 23750. Up to 2745 conditions per place. [2024-06-14 14:07:56,212 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 179 selfloop transitions, 108 changer transitions 0/296 dead transitions. [2024-06-14 14:07:56,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 296 transitions, 4161 flow [2024-06-14 14:07:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 290 transitions. [2024-06-14 14:07:56,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5991735537190083 [2024-06-14 14:07:56,214 INFO L175 Difference]: Start difference. First operand has 188 places, 247 transitions, 2979 flow. Second operand 11 states and 290 transitions. [2024-06-14 14:07:56,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 296 transitions, 4161 flow [2024-06-14 14:07:56,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 296 transitions, 3899 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:56,544 INFO L231 Difference]: Finished difference. Result has 191 places, 249 transitions, 3035 flow [2024-06-14 14:07:56,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3035, PETRI_PLACES=191, PETRI_TRANSITIONS=249} [2024-06-14 14:07:56,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-14 14:07:56,544 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 249 transitions, 3035 flow [2024-06-14 14:07:56,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:56,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:56,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:56,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:07:56,545 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)] === [2024-06-14 14:07:56,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash -590109530, now seen corresponding path program 9 times [2024-06-14 14:07:56,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:56,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488116639] [2024-06-14 14:07:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:56,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:56,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488116639] [2024-06-14 14:07:56,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488116639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:56,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:56,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:56,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843982035] [2024-06-14 14:07:56,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:56,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:56,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:56,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:56,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:56,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:56,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 249 transitions, 3035 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:56,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:56,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:56,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:57,422 INFO L124 PetriNetUnfolderBase]: 2234/3879 cut-off events. [2024-06-14 14:07:57,422 INFO L125 PetriNetUnfolderBase]: For 209388/209388 co-relation queries the response was YES. [2024-06-14 14:07:57,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26783 conditions, 3879 events. 2234/3879 cut-off events. For 209388/209388 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25103 event pairs, 465 based on Foata normal form. 18/3889 useless extension candidates. Maximal degree in co-relation 26693. Up to 2594 conditions per place. [2024-06-14 14:07:57,458 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 179 selfloop transitions, 117 changer transitions 0/305 dead transitions. [2024-06-14 14:07:57,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 305 transitions, 4529 flow [2024-06-14 14:07:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2024-06-14 14:07:57,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074380165289256 [2024-06-14 14:07:57,459 INFO L175 Difference]: Start difference. First operand has 191 places, 249 transitions, 3035 flow. Second operand 11 states and 294 transitions. [2024-06-14 14:07:57,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 305 transitions, 4529 flow [2024-06-14 14:07:57,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 305 transitions, 4255 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:57,893 INFO L231 Difference]: Finished difference. Result has 193 places, 253 transitions, 3194 flow [2024-06-14 14:07:57,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3194, PETRI_PLACES=193, PETRI_TRANSITIONS=253} [2024-06-14 14:07:57,893 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-14 14:07:57,893 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 253 transitions, 3194 flow [2024-06-14 14:07:57,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:57,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:57,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:57,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:07:57,894 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)] === [2024-06-14 14:07:57,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:57,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1288883366, now seen corresponding path program 10 times [2024-06-14 14:07:57,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:57,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395726777] [2024-06-14 14:07:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:57,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:58,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:58,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395726777] [2024-06-14 14:07:58,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395726777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:58,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:58,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:58,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626961624] [2024-06-14 14:07:58,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:58,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:58,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:58,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:58,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 253 transitions, 3194 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:58,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:58,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:58,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:58,764 INFO L124 PetriNetUnfolderBase]: 2242/3895 cut-off events. [2024-06-14 14:07:58,764 INFO L125 PetriNetUnfolderBase]: For 206933/206933 co-relation queries the response was YES. [2024-06-14 14:07:58,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3895 events. 2242/3895 cut-off events. For 206933/206933 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25168 event pairs, 456 based on Foata normal form. 24/3911 useless extension candidates. Maximal degree in co-relation 26059. Up to 3263 conditions per place. [2024-06-14 14:07:58,800 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 234 selfloop transitions, 42 changer transitions 0/285 dead transitions. [2024-06-14 14:07:58,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 285 transitions, 3995 flow [2024-06-14 14:07:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 14:07:58,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-06-14 14:07:58,801 INFO L175 Difference]: Start difference. First operand has 193 places, 253 transitions, 3194 flow. Second operand 8 states and 210 transitions. [2024-06-14 14:07:58,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 285 transitions, 3995 flow [2024-06-14 14:07:59,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 285 transitions, 3758 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:59,171 INFO L231 Difference]: Finished difference. Result has 195 places, 256 transitions, 3118 flow [2024-06-14 14:07:59,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3118, PETRI_PLACES=195, PETRI_TRANSITIONS=256} [2024-06-14 14:07:59,171 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 150 predicate places. [2024-06-14 14:07:59,172 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 256 transitions, 3118 flow [2024-06-14 14:07:59,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:59,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:59,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:59,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:07:59,172 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)] === [2024-06-14 14:07:59,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -412612086, now seen corresponding path program 2 times [2024-06-14 14:07:59,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:59,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692234754] [2024-06-14 14:07:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:59,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:59,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:59,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692234754] [2024-06-14 14:07:59,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692234754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:59,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:59,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:59,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791469130] [2024-06-14 14:07:59,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:59,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:59,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:59,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:59,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:59,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:07:59,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 256 transitions, 3118 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:59,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:59,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:07:59,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:00,170 INFO L124 PetriNetUnfolderBase]: 2303/4007 cut-off events. [2024-06-14 14:08:00,170 INFO L125 PetriNetUnfolderBase]: For 202421/202421 co-relation queries the response was YES. [2024-06-14 14:08:00,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26571 conditions, 4007 events. 2303/4007 cut-off events. For 202421/202421 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26132 event pairs, 475 based on Foata normal form. 18/4017 useless extension candidates. Maximal degree in co-relation 26478. Up to 2895 conditions per place. [2024-06-14 14:08:00,207 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 184 selfloop transitions, 110 changer transitions 0/303 dead transitions. [2024-06-14 14:08:00,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 303 transitions, 4250 flow [2024-06-14 14:08:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-06-14 14:08:00,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-14 14:08:00,209 INFO L175 Difference]: Start difference. First operand has 195 places, 256 transitions, 3118 flow. Second operand 10 states and 270 transitions. [2024-06-14 14:08:00,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 303 transitions, 4250 flow [2024-06-14 14:08:00,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 303 transitions, 4142 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:00,630 INFO L231 Difference]: Finished difference. Result has 200 places, 258 transitions, 3339 flow [2024-06-14 14:08:00,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3339, PETRI_PLACES=200, PETRI_TRANSITIONS=258} [2024-06-14 14:08:00,630 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-14 14:08:00,630 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 258 transitions, 3339 flow [2024-06-14 14:08:00,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:00,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:00,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:00,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:08:00,631 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)] === [2024-06-14 14:08:00,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1297461190, now seen corresponding path program 3 times [2024-06-14 14:08:00,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:00,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394823267] [2024-06-14 14:08:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:00,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:00,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:00,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394823267] [2024-06-14 14:08:00,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394823267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:00,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:00,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:00,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114794444] [2024-06-14 14:08:00,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:00,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:00,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:00,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:00,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:00,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 258 transitions, 3339 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:00,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:00,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:00,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:01,502 INFO L124 PetriNetUnfolderBase]: 2364/4127 cut-off events. [2024-06-14 14:08:01,502 INFO L125 PetriNetUnfolderBase]: For 213284/213284 co-relation queries the response was YES. [2024-06-14 14:08:01,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27671 conditions, 4127 events. 2364/4127 cut-off events. For 213284/213284 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27107 event pairs, 475 based on Foata normal form. 18/4137 useless extension candidates. Maximal degree in co-relation 27577. Up to 3352 conditions per place. [2024-06-14 14:08:01,536 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 238 selfloop transitions, 45 changer transitions 0/292 dead transitions. [2024-06-14 14:08:01,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 292 transitions, 4219 flow [2024-06-14 14:08:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 14:08:01,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 14:08:01,538 INFO L175 Difference]: Start difference. First operand has 200 places, 258 transitions, 3339 flow. Second operand 8 states and 212 transitions. [2024-06-14 14:08:01,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 292 transitions, 4219 flow [2024-06-14 14:08:01,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 292 transitions, 3926 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:01,942 INFO L231 Difference]: Finished difference. Result has 200 places, 260 transitions, 3249 flow [2024-06-14 14:08:01,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3249, PETRI_PLACES=200, PETRI_TRANSITIONS=260} [2024-06-14 14:08:01,942 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-14 14:08:01,942 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 260 transitions, 3249 flow [2024-06-14 14:08:01,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:01,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:01,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:01,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:08:01,943 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)] === [2024-06-14 14:08:01,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:01,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1520465978, now seen corresponding path program 4 times [2024-06-14 14:08:01,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:01,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899038221] [2024-06-14 14:08:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:01,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:02,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:02,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899038221] [2024-06-14 14:08:02,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899038221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:02,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:02,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:02,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053190428] [2024-06-14 14:08:02,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:02,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:02,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:02,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:02,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:02,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:02,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 260 transitions, 3249 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:02,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:02,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:02,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:02,872 INFO L124 PetriNetUnfolderBase]: 2430/4257 cut-off events. [2024-06-14 14:08:02,872 INFO L125 PetriNetUnfolderBase]: For 220583/220583 co-relation queries the response was YES. [2024-06-14 14:08:02,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28473 conditions, 4257 events. 2430/4257 cut-off events. For 220583/220583 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28149 event pairs, 477 based on Foata normal form. 18/4267 useless extension candidates. Maximal degree in co-relation 28378. Up to 3158 conditions per place. [2024-06-14 14:08:02,914 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 246 selfloop transitions, 44 changer transitions 0/299 dead transitions. [2024-06-14 14:08:02,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 299 transitions, 4195 flow [2024-06-14 14:08:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 14:08:02,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107954545454546 [2024-06-14 14:08:02,915 INFO L175 Difference]: Start difference. First operand has 200 places, 260 transitions, 3249 flow. Second operand 8 states and 215 transitions. [2024-06-14 14:08:02,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 299 transitions, 4195 flow [2024-06-14 14:08:03,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 299 transitions, 4028 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:03,330 INFO L231 Difference]: Finished difference. Result has 202 places, 262 transitions, 3234 flow [2024-06-14 14:08:03,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3234, PETRI_PLACES=202, PETRI_TRANSITIONS=262} [2024-06-14 14:08:03,330 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 157 predicate places. [2024-06-14 14:08:03,330 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 262 transitions, 3234 flow [2024-06-14 14:08:03,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:03,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:03,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:03,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:08:03,331 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:03,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash -438869441, now seen corresponding path program 1 times [2024-06-14 14:08:03,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:03,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535251759] [2024-06-14 14:08:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:03,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:03,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:03,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535251759] [2024-06-14 14:08:03,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535251759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:03,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:03,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:03,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111338307] [2024-06-14 14:08:03,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:03,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:03,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:03,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:03,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 262 transitions, 3234 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) [2024-06-14 14:08:03,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:03,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:03,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:04,118 INFO L124 PetriNetUnfolderBase]: 2443/4273 cut-off events. [2024-06-14 14:08:04,118 INFO L125 PetriNetUnfolderBase]: For 208924/208924 co-relation queries the response was YES. [2024-06-14 14:08:04,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28601 conditions, 4273 events. 2443/4273 cut-off events. For 208924/208924 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28365 event pairs, 545 based on Foata normal form. 1/4266 useless extension candidates. Maximal degree in co-relation 28504. Up to 3710 conditions per place. [2024-06-14 14:08:04,159 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 227 selfloop transitions, 45 changer transitions 0/281 dead transitions. [2024-06-14 14:08:04,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 281 transitions, 3998 flow [2024-06-14 14:08:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-14 14:08:04,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-14 14:08:04,160 INFO L175 Difference]: Start difference. First operand has 202 places, 262 transitions, 3234 flow. Second operand 5 states and 135 transitions. [2024-06-14 14:08:04,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 281 transitions, 3998 flow [2024-06-14 14:08:04,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 281 transitions, 3861 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:04,608 INFO L231 Difference]: Finished difference. Result has 203 places, 268 transitions, 3289 flow [2024-06-14 14:08:04,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3289, PETRI_PLACES=203, PETRI_TRANSITIONS=268} [2024-06-14 14:08:04,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-14 14:08:04,609 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 268 transitions, 3289 flow [2024-06-14 14:08:04,609 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) [2024-06-14 14:08:04,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:04,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:04,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:08:04,609 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:04,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:04,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1634138597, now seen corresponding path program 2 times [2024-06-14 14:08:04,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:04,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739853977] [2024-06-14 14:08:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:04,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:04,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739853977] [2024-06-14 14:08:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739853977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:04,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:04,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:04,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38336322] [2024-06-14 14:08:04,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:04,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:04,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:04,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:04,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:04,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 268 transitions, 3289 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) [2024-06-14 14:08:04,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:04,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:04,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:05,473 INFO L124 PetriNetUnfolderBase]: 2440/4270 cut-off events. [2024-06-14 14:08:05,473 INFO L125 PetriNetUnfolderBase]: For 202179/202179 co-relation queries the response was YES. [2024-06-14 14:08:05,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28033 conditions, 4270 events. 2440/4270 cut-off events. For 202179/202179 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28360 event pairs, 542 based on Foata normal form. 1/4266 useless extension candidates. Maximal degree in co-relation 27934. Up to 3707 conditions per place. [2024-06-14 14:08:05,508 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 223 selfloop transitions, 50 changer transitions 0/282 dead transitions. [2024-06-14 14:08:05,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 282 transitions, 3869 flow [2024-06-14 14:08:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:08:05,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 14:08:05,509 INFO L175 Difference]: Start difference. First operand has 203 places, 268 transitions, 3289 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:08:05,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 282 transitions, 3869 flow [2024-06-14 14:08:05,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 282 transitions, 3829 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:05,982 INFO L231 Difference]: Finished difference. Result has 208 places, 268 transitions, 3360 flow [2024-06-14 14:08:05,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3360, PETRI_PLACES=208, PETRI_TRANSITIONS=268} [2024-06-14 14:08:05,983 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-14 14:08:05,983 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 268 transitions, 3360 flow [2024-06-14 14:08:05,983 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) [2024-06-14 14:08:05,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:05,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:05,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:08:05,984 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:05,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash 851535971, now seen corresponding path program 1 times [2024-06-14 14:08:05,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:05,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247895104] [2024-06-14 14:08:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:05,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:06,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:06,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247895104] [2024-06-14 14:08:06,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247895104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:06,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:06,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:06,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798714303] [2024-06-14 14:08:06,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:06,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:06,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:06,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:06,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:06,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 268 transitions, 3360 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) [2024-06-14 14:08:06,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:06,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:06,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:06,800 INFO L124 PetriNetUnfolderBase]: 2448/4281 cut-off events. [2024-06-14 14:08:06,800 INFO L125 PetriNetUnfolderBase]: For 205320/205320 co-relation queries the response was YES. [2024-06-14 14:08:06,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28325 conditions, 4281 events. 2448/4281 cut-off events. For 205320/205320 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28355 event pairs, 456 based on Foata normal form. 2/4275 useless extension candidates. Maximal degree in co-relation 28225. Up to 3735 conditions per place. [2024-06-14 14:08:06,840 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 259 selfloop transitions, 19 changer transitions 0/287 dead transitions. [2024-06-14 14:08:06,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 287 transitions, 4190 flow [2024-06-14 14:08:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 14:08:06,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954545454545455 [2024-06-14 14:08:06,841 INFO L175 Difference]: Start difference. First operand has 208 places, 268 transitions, 3360 flow. Second operand 5 states and 131 transitions. [2024-06-14 14:08:06,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 287 transitions, 4190 flow [2024-06-14 14:08:07,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 287 transitions, 4077 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:07,281 INFO L231 Difference]: Finished difference. Result has 207 places, 272 transitions, 3424 flow [2024-06-14 14:08:07,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3424, PETRI_PLACES=207, PETRI_TRANSITIONS=272} [2024-06-14 14:08:07,281 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 162 predicate places. [2024-06-14 14:08:07,281 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 272 transitions, 3424 flow [2024-06-14 14:08:07,281 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) [2024-06-14 14:08:07,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:07,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:07,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 14:08:07,282 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:07,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1634135621, now seen corresponding path program 2 times [2024-06-14 14:08:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:07,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340525617] [2024-06-14 14:08:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:07,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340525617] [2024-06-14 14:08:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340525617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:07,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:07,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:07,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384519597] [2024-06-14 14:08:07,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:07,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:07,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:07,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:07,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 272 transitions, 3424 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) [2024-06-14 14:08:07,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:07,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:07,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:08,044 INFO L124 PetriNetUnfolderBase]: 2443/4275 cut-off events. [2024-06-14 14:08:08,045 INFO L125 PetriNetUnfolderBase]: For 202765/202765 co-relation queries the response was YES. [2024-06-14 14:08:08,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28127 conditions, 4275 events. 2443/4275 cut-off events. For 202765/202765 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28407 event pairs, 539 based on Foata normal form. 2/4272 useless extension candidates. Maximal degree in co-relation 28027. Up to 3775 conditions per place. [2024-06-14 14:08:08,089 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 255 selfloop transitions, 18 changer transitions 0/282 dead transitions. [2024-06-14 14:08:08,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 282 transitions, 3994 flow [2024-06-14 14:08:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 14:08:08,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-14 14:08:08,090 INFO L175 Difference]: Start difference. First operand has 207 places, 272 transitions, 3424 flow. Second operand 5 states and 128 transitions. [2024-06-14 14:08:08,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 282 transitions, 3994 flow [2024-06-14 14:08:08,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 282 transitions, 3870 flow, removed 56 selfloop flow, removed 1 redundant places. [2024-06-14 14:08:08,472 INFO L231 Difference]: Finished difference. Result has 211 places, 272 transitions, 3341 flow [2024-06-14 14:08:08,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3341, PETRI_PLACES=211, PETRI_TRANSITIONS=272} [2024-06-14 14:08:08,473 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-14 14:08:08,473 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 272 transitions, 3341 flow [2024-06-14 14:08:08,473 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) [2024-06-14 14:08:08,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:08,473 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] [2024-06-14 14:08:08,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 14:08:08,473 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:08,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash 604949153, now seen corresponding path program 3 times [2024-06-14 14:08:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:08,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137212982] [2024-06-14 14:08:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:08,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:08,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137212982] [2024-06-14 14:08:08,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137212982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:08,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:08,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:08,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734703640] [2024-06-14 14:08:08,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:08,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:08,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:08,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:08,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:08,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:08,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 272 transitions, 3341 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) [2024-06-14 14:08:08,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:08,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:08,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:09,311 INFO L124 PetriNetUnfolderBase]: 2453/4292 cut-off events. [2024-06-14 14:08:09,311 INFO L125 PetriNetUnfolderBase]: For 207856/207856 co-relation queries the response was YES. [2024-06-14 14:08:09,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28207 conditions, 4292 events. 2453/4292 cut-off events. For 207856/207856 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28574 event pairs, 542 based on Foata normal form. 2/4286 useless extension candidates. Maximal degree in co-relation 28105. Up to 3683 conditions per place. [2024-06-14 14:08:09,346 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 223 selfloop transitions, 63 changer transitions 0/295 dead transitions. [2024-06-14 14:08:09,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 295 transitions, 4157 flow [2024-06-14 14:08:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:08:09,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 14:08:09,347 INFO L175 Difference]: Start difference. First operand has 211 places, 272 transitions, 3341 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:08:09,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 295 transitions, 4157 flow [2024-06-14 14:08:09,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 295 transitions, 4109 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:09,681 INFO L231 Difference]: Finished difference. Result has 213 places, 278 transitions, 3519 flow [2024-06-14 14:08:09,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3519, PETRI_PLACES=213, PETRI_TRANSITIONS=278} [2024-06-14 14:08:09,682 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-14 14:08:09,682 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 278 transitions, 3519 flow [2024-06-14 14:08:09,682 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) [2024-06-14 14:08:09,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:09,682 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] [2024-06-14 14:08:09,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 14:08:09,682 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:09,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1795202109, now seen corresponding path program 4 times [2024-06-14 14:08:09,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:09,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832422517] [2024-06-14 14:08:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:09,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:09,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832422517] [2024-06-14 14:08:09,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832422517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:09,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:09,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:09,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826785885] [2024-06-14 14:08:09,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:09,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:09,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:09,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:09,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 278 transitions, 3519 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) [2024-06-14 14:08:09,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:09,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:09,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:10,482 INFO L124 PetriNetUnfolderBase]: 2455/4297 cut-off events. [2024-06-14 14:08:10,482 INFO L125 PetriNetUnfolderBase]: For 213163/213163 co-relation queries the response was YES. [2024-06-14 14:08:10,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28435 conditions, 4297 events. 2455/4297 cut-off events. For 213163/213163 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28634 event pairs, 542 based on Foata normal form. 2/4291 useless extension candidates. Maximal degree in co-relation 28332. Up to 3686 conditions per place. [2024-06-14 14:08:10,528 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 219 selfloop transitions, 67 changer transitions 0/295 dead transitions. [2024-06-14 14:08:10,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 295 transitions, 4291 flow [2024-06-14 14:08:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:10,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 14:08:10,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871212121212122 [2024-06-14 14:08:10,529 INFO L175 Difference]: Start difference. First operand has 213 places, 278 transitions, 3519 flow. Second operand 6 states and 155 transitions. [2024-06-14 14:08:10,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 295 transitions, 4291 flow [2024-06-14 14:08:10,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 295 transitions, 4104 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:10,963 INFO L231 Difference]: Finished difference. Result has 215 places, 281 transitions, 3528 flow [2024-06-14 14:08:10,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3528, PETRI_PLACES=215, PETRI_TRANSITIONS=281} [2024-06-14 14:08:10,964 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-14 14:08:10,964 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 281 transitions, 3528 flow [2024-06-14 14:08:10,964 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) [2024-06-14 14:08:10,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:10,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:10,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 14:08:10,965 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:10,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:10,965 INFO L85 PathProgramCache]: Analyzing trace with hash -655031811, now seen corresponding path program 5 times [2024-06-14 14:08:10,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:10,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660237145] [2024-06-14 14:08:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:11,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:11,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660237145] [2024-06-14 14:08:11,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660237145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:11,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:11,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:11,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724901619] [2024-06-14 14:08:11,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:11,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:11,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:11,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:11,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 281 transitions, 3528 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) [2024-06-14 14:08:11,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:11,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:11,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:11,742 INFO L124 PetriNetUnfolderBase]: 2452/4278 cut-off events. [2024-06-14 14:08:11,742 INFO L125 PetriNetUnfolderBase]: For 216823/216823 co-relation queries the response was YES. [2024-06-14 14:08:11,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28297 conditions, 4278 events. 2452/4278 cut-off events. For 216823/216823 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28435 event pairs, 570 based on Foata normal form. 1/4271 useless extension candidates. Maximal degree in co-relation 28194. Up to 3683 conditions per place. [2024-06-14 14:08:11,781 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 214 selfloop transitions, 68 changer transitions 0/291 dead transitions. [2024-06-14 14:08:11,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 291 transitions, 4116 flow [2024-06-14 14:08:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 14:08:11,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-14 14:08:11,782 INFO L175 Difference]: Start difference. First operand has 215 places, 281 transitions, 3528 flow. Second operand 6 states and 152 transitions. [2024-06-14 14:08:11,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 291 transitions, 4116 flow [2024-06-14 14:08:12,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 291 transitions, 3999 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:12,235 INFO L231 Difference]: Finished difference. Result has 218 places, 281 transitions, 3553 flow [2024-06-14 14:08:12,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3411, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3553, PETRI_PLACES=218, PETRI_TRANSITIONS=281} [2024-06-14 14:08:12,235 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-14 14:08:12,235 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 281 transitions, 3553 flow [2024-06-14 14:08:12,235 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) [2024-06-14 14:08:12,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:12,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:12,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 14:08:12,236 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:12,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash -903923007, now seen corresponding path program 1 times [2024-06-14 14:08:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:12,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500562616] [2024-06-14 14:08:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:12,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:12,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500562616] [2024-06-14 14:08:12,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500562616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:12,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:12,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:12,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140456614] [2024-06-14 14:08:12,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:12,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:12,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:12,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:12,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:12,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:12,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 281 transitions, 3553 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) [2024-06-14 14:08:12,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:12,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:12,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:13,242 INFO L124 PetriNetUnfolderBase]: 2457/4307 cut-off events. [2024-06-14 14:08:13,242 INFO L125 PetriNetUnfolderBase]: For 223231/223231 co-relation queries the response was YES. [2024-06-14 14:08:13,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28476 conditions, 4307 events. 2457/4307 cut-off events. For 223231/223231 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28661 event pairs, 533 based on Foata normal form. 1/4301 useless extension candidates. Maximal degree in co-relation 28372. Up to 3758 conditions per place. [2024-06-14 14:08:13,277 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 258 selfloop transitions, 40 changer transitions 0/307 dead transitions. [2024-06-14 14:08:13,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 307 transitions, 4245 flow [2024-06-14 14:08:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 14:08:13,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:08:13,278 INFO L175 Difference]: Start difference. First operand has 218 places, 281 transitions, 3553 flow. Second operand 7 states and 182 transitions. [2024-06-14 14:08:13,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 307 transitions, 4245 flow [2024-06-14 14:08:13,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 307 transitions, 3958 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:13,657 INFO L231 Difference]: Finished difference. Result has 217 places, 284 transitions, 3396 flow [2024-06-14 14:08:13,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3396, PETRI_PLACES=217, PETRI_TRANSITIONS=284} [2024-06-14 14:08:13,657 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-14 14:08:13,657 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 284 transitions, 3396 flow [2024-06-14 14:08:13,658 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) [2024-06-14 14:08:13,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:13,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:13,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 14:08:13,658 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:13,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash -223758755, now seen corresponding path program 2 times [2024-06-14 14:08:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:13,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451665206] [2024-06-14 14:08:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:13,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451665206] [2024-06-14 14:08:13,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451665206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:13,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:13,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944781443] [2024-06-14 14:08:13,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:13,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:13,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:13,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:13,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 284 transitions, 3396 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) [2024-06-14 14:08:13,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:13,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:13,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:14,600 INFO L124 PetriNetUnfolderBase]: 2454/4305 cut-off events. [2024-06-14 14:08:14,600 INFO L125 PetriNetUnfolderBase]: For 226553/226553 co-relation queries the response was YES. [2024-06-14 14:08:14,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28370 conditions, 4305 events. 2454/4305 cut-off events. For 226553/226553 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28662 event pairs, 523 based on Foata normal form. 1/4301 useless extension candidates. Maximal degree in co-relation 28266. Up to 3690 conditions per place. [2024-06-14 14:08:14,642 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 239 selfloop transitions, 65 changer transitions 0/313 dead transitions. [2024-06-14 14:08:14,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 313 transitions, 4196 flow [2024-06-14 14:08:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-14 14:08:14,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-14 14:08:14,643 INFO L175 Difference]: Start difference. First operand has 217 places, 284 transitions, 3396 flow. Second operand 9 states and 228 transitions. [2024-06-14 14:08:14,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 313 transitions, 4196 flow [2024-06-14 14:08:15,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 313 transitions, 4102 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:15,091 INFO L231 Difference]: Finished difference. Result has 221 places, 284 transitions, 3438 flow [2024-06-14 14:08:15,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3438, PETRI_PLACES=221, PETRI_TRANSITIONS=284} [2024-06-14 14:08:15,091 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-14 14:08:15,091 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 284 transitions, 3438 flow [2024-06-14 14:08:15,091 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) [2024-06-14 14:08:15,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:15,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:15,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 14:08:15,092 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:15,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1348534657, now seen corresponding path program 3 times [2024-06-14 14:08:15,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:15,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352713035] [2024-06-14 14:08:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:15,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:15,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:15,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352713035] [2024-06-14 14:08:15,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352713035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:15,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:15,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:15,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602577401] [2024-06-14 14:08:15,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:15,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:15,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:15,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:15,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:15,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:15,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 284 transitions, 3438 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:15,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:15,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:15,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:16,102 INFO L124 PetriNetUnfolderBase]: 2459/4313 cut-off events. [2024-06-14 14:08:16,102 INFO L125 PetriNetUnfolderBase]: For 232465/232465 co-relation queries the response was YES. [2024-06-14 14:08:16,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28613 conditions, 4313 events. 2459/4313 cut-off events. For 232465/232465 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28733 event pairs, 531 based on Foata normal form. 1/4309 useless extension candidates. Maximal degree in co-relation 28508. Up to 3696 conditions per place. [2024-06-14 14:08:16,148 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 230 selfloop transitions, 68 changer transitions 0/307 dead transitions. [2024-06-14 14:08:16,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 307 transitions, 4246 flow [2024-06-14 14:08:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 14:08:16,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-06-14 14:08:16,149 INFO L175 Difference]: Start difference. First operand has 221 places, 284 transitions, 3438 flow. Second operand 9 states and 219 transitions. [2024-06-14 14:08:16,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 307 transitions, 4246 flow [2024-06-14 14:08:16,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 307 transitions, 4128 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:16,736 INFO L231 Difference]: Finished difference. Result has 224 places, 287 transitions, 3504 flow [2024-06-14 14:08:16,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3504, PETRI_PLACES=224, PETRI_TRANSITIONS=287} [2024-06-14 14:08:16,736 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-14 14:08:16,736 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 287 transitions, 3504 flow [2024-06-14 14:08:16,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:16,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:16,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:16,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 14:08:16,737 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:16,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1505609855, now seen corresponding path program 1 times [2024-06-14 14:08:16,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:16,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856542483] [2024-06-14 14:08:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:16,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:16,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:16,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856542483] [2024-06-14 14:08:16,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856542483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:16,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:16,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:16,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48761036] [2024-06-14 14:08:16,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:16,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:16,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:16,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:16,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:16,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 287 transitions, 3504 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) [2024-06-14 14:08:16,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:16,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:16,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:17,531 INFO L124 PetriNetUnfolderBase]: 2472/4333 cut-off events. [2024-06-14 14:08:17,532 INFO L125 PetriNetUnfolderBase]: For 241290/241290 co-relation queries the response was YES. [2024-06-14 14:08:17,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28922 conditions, 4333 events. 2472/4333 cut-off events. For 241290/241290 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28885 event pairs, 535 based on Foata normal form. 1/4327 useless extension candidates. Maximal degree in co-relation 28816. Up to 3741 conditions per place. [2024-06-14 14:08:17,575 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 248 selfloop transitions, 54 changer transitions 0/311 dead transitions. [2024-06-14 14:08:17,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 311 transitions, 4480 flow [2024-06-14 14:08:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 14:08:17,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 14:08:17,576 INFO L175 Difference]: Start difference. First operand has 224 places, 287 transitions, 3504 flow. Second operand 6 states and 159 transitions. [2024-06-14 14:08:17,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 311 transitions, 4480 flow [2024-06-14 14:08:18,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 311 transitions, 4362 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:18,108 INFO L231 Difference]: Finished difference. Result has 224 places, 293 transitions, 3581 flow [2024-06-14 14:08:18,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3581, PETRI_PLACES=224, PETRI_TRANSITIONS=293} [2024-06-14 14:08:18,108 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-14 14:08:18,109 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 293 transitions, 3581 flow [2024-06-14 14:08:18,109 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) [2024-06-14 14:08:18,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:18,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:18,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 14:08:18,109 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:18,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1520846975, now seen corresponding path program 2 times [2024-06-14 14:08:18,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:18,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773656943] [2024-06-14 14:08:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:18,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:18,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773656943] [2024-06-14 14:08:18,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773656943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:18,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:18,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:18,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539277629] [2024-06-14 14:08:18,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:18,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:18,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:18,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 293 transitions, 3581 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:18,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:18,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:18,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:18,935 INFO L124 PetriNetUnfolderBase]: 2477/4342 cut-off events. [2024-06-14 14:08:18,935 INFO L125 PetriNetUnfolderBase]: For 248304/248304 co-relation queries the response was YES. [2024-06-14 14:08:18,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29057 conditions, 4342 events. 2477/4342 cut-off events. For 248304/248304 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28973 event pairs, 535 based on Foata normal form. 1/4336 useless extension candidates. Maximal degree in co-relation 28950. Up to 3747 conditions per place. [2024-06-14 14:08:18,977 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 247 selfloop transitions, 55 changer transitions 0/311 dead transitions. [2024-06-14 14:08:18,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 311 transitions, 4393 flow [2024-06-14 14:08:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:08:18,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:08:18,978 INFO L175 Difference]: Start difference. First operand has 224 places, 293 transitions, 3581 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:08:18,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 311 transitions, 4393 flow [2024-06-14 14:08:19,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 311 transitions, 4315 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:19,700 INFO L231 Difference]: Finished difference. Result has 229 places, 296 transitions, 3665 flow [2024-06-14 14:08:19,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3665, PETRI_PLACES=229, PETRI_TRANSITIONS=296} [2024-06-14 14:08:19,701 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-14 14:08:19,701 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 296 transitions, 3665 flow [2024-06-14 14:08:19,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:19,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:19,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:19,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 14:08:19,701 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:19,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:19,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1133731263, now seen corresponding path program 4 times [2024-06-14 14:08:19,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:19,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333754404] [2024-06-14 14:08:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:19,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:19,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:19,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333754404] [2024-06-14 14:08:19,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333754404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:19,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:19,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:19,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832928625] [2024-06-14 14:08:19,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:19,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:20,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:20,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 296 transitions, 3665 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:20,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:20,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:20,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:20,673 INFO L124 PetriNetUnfolderBase]: 2474/4331 cut-off events. [2024-06-14 14:08:20,673 INFO L125 PetriNetUnfolderBase]: For 254385/254385 co-relation queries the response was YES. [2024-06-14 14:08:20,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29097 conditions, 4331 events. 2474/4331 cut-off events. For 254385/254385 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28899 event pairs, 544 based on Foata normal form. 1/4327 useless extension candidates. Maximal degree in co-relation 28989. Up to 3718 conditions per place. [2024-06-14 14:08:20,710 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 232 selfloop transitions, 71 changer transitions 0/312 dead transitions. [2024-06-14 14:08:20,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 312 transitions, 4309 flow [2024-06-14 14:08:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 14:08:20,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:08:20,711 INFO L175 Difference]: Start difference. First operand has 229 places, 296 transitions, 3665 flow. Second operand 9 states and 216 transitions. [2024-06-14 14:08:20,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 312 transitions, 4309 flow [2024-06-14 14:08:21,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 312 transitions, 4171 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:21,224 INFO L231 Difference]: Finished difference. Result has 233 places, 296 transitions, 3675 flow [2024-06-14 14:08:21,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3675, PETRI_PLACES=233, PETRI_TRANSITIONS=296} [2024-06-14 14:08:21,225 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-14 14:08:21,225 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 296 transitions, 3675 flow [2024-06-14 14:08:21,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:21,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:21,225 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] [2024-06-14 14:08:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 14:08:21,226 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:21,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:21,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1926635241, now seen corresponding path program 3 times [2024-06-14 14:08:21,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:21,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295212825] [2024-06-14 14:08:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:21,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:21,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:21,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295212825] [2024-06-14 14:08:21,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295212825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:21,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:21,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:21,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904465341] [2024-06-14 14:08:21,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:21,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:21,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:21,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 296 transitions, 3675 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) [2024-06-14 14:08:21,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:21,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:21,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:22,058 INFO L124 PetriNetUnfolderBase]: 2479/4344 cut-off events. [2024-06-14 14:08:22,058 INFO L125 PetriNetUnfolderBase]: For 261038/261038 co-relation queries the response was YES. [2024-06-14 14:08:22,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29288 conditions, 4344 events. 2479/4344 cut-off events. For 261038/261038 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28952 event pairs, 540 based on Foata normal form. 1/4334 useless extension candidates. Maximal degree in co-relation 29179. Up to 3749 conditions per place. [2024-06-14 14:08:22,101 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 250 selfloop transitions, 61 changer transitions 0/320 dead transitions. [2024-06-14 14:08:22,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 320 transitions, 4652 flow [2024-06-14 14:08:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 14:08:22,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-06-14 14:08:22,102 INFO L175 Difference]: Start difference. First operand has 233 places, 296 transitions, 3675 flow. Second operand 6 states and 163 transitions. [2024-06-14 14:08:22,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 320 transitions, 4652 flow [2024-06-14 14:08:22,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 320 transitions, 4504 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:22,836 INFO L231 Difference]: Finished difference. Result has 232 places, 299 transitions, 3698 flow [2024-06-14 14:08:22,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3698, PETRI_PLACES=232, PETRI_TRANSITIONS=299} [2024-06-14 14:08:22,836 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-14 14:08:22,837 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 299 transitions, 3698 flow [2024-06-14 14:08:22,837 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) [2024-06-14 14:08:22,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:22,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 14:08:22,837 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:22,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash -715961753, now seen corresponding path program 4 times [2024-06-14 14:08:22,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694744950] [2024-06-14 14:08:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:22,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:23,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:23,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694744950] [2024-06-14 14:08:23,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694744950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:23,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:23,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:23,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003291316] [2024-06-14 14:08:23,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:23,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:23,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:23,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:23,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:23,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 299 transitions, 3698 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) [2024-06-14 14:08:23,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:23,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:23,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:23,663 INFO L124 PetriNetUnfolderBase]: 2484/4353 cut-off events. [2024-06-14 14:08:23,663 INFO L125 PetriNetUnfolderBase]: For 267987/267987 co-relation queries the response was YES. [2024-06-14 14:08:23,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29417 conditions, 4353 events. 2484/4353 cut-off events. For 267987/267987 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29045 event pairs, 540 based on Foata normal form. 1/4343 useless extension candidates. Maximal degree in co-relation 29307. Up to 3755 conditions per place. [2024-06-14 14:08:23,704 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 245 selfloop transitions, 66 changer transitions 0/320 dead transitions. [2024-06-14 14:08:23,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 320 transitions, 4558 flow [2024-06-14 14:08:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 14:08:23,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-06-14 14:08:23,705 INFO L175 Difference]: Start difference. First operand has 232 places, 299 transitions, 3698 flow. Second operand 6 states and 158 transitions. [2024-06-14 14:08:23,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 320 transitions, 4558 flow [2024-06-14 14:08:24,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 320 transitions, 4368 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:24,112 INFO L231 Difference]: Finished difference. Result has 234 places, 303 transitions, 3710 flow [2024-06-14 14:08:24,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3710, PETRI_PLACES=234, PETRI_TRANSITIONS=303} [2024-06-14 14:08:24,113 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-14 14:08:24,113 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 303 transitions, 3710 flow [2024-06-14 14:08:24,113 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) [2024-06-14 14:08:24,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:24,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:24,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 14:08:24,113 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:24,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:24,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1127058079, now seen corresponding path program 5 times [2024-06-14 14:08:24,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:24,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539825846] [2024-06-14 14:08:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:24,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:24,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:24,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539825846] [2024-06-14 14:08:24,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539825846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:24,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:24,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:24,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594532576] [2024-06-14 14:08:24,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:24,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:24,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:24,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:24,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:24,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:24,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 303 transitions, 3710 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:24,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:24,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:24,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:24,951 INFO L124 PetriNetUnfolderBase]: 2489/4355 cut-off events. [2024-06-14 14:08:24,951 INFO L125 PetriNetUnfolderBase]: For 274955/274955 co-relation queries the response was YES. [2024-06-14 14:08:24,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29551 conditions, 4355 events. 2489/4355 cut-off events. For 274955/274955 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29039 event pairs, 552 based on Foata normal form. 1/4351 useless extension candidates. Maximal degree in co-relation 29441. Up to 3761 conditions per place. [2024-06-14 14:08:24,993 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 242 selfloop transitions, 67 changer transitions 0/318 dead transitions. [2024-06-14 14:08:24,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 318 transitions, 4539 flow [2024-06-14 14:08:24,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:08:24,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-14 14:08:24,994 INFO L175 Difference]: Start difference. First operand has 234 places, 303 transitions, 3710 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:08:24,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 318 transitions, 4539 flow [2024-06-14 14:08:25,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 318 transitions, 4429 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:25,626 INFO L231 Difference]: Finished difference. Result has 239 places, 306 transitions, 3789 flow [2024-06-14 14:08:25,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3789, PETRI_PLACES=239, PETRI_TRANSITIONS=306} [2024-06-14 14:08:25,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-14 14:08:25,626 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 306 transitions, 3789 flow [2024-06-14 14:08:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:25,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:25,627 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] [2024-06-14 14:08:25,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 14:08:25,627 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:25,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1876586937, now seen corresponding path program 6 times [2024-06-14 14:08:25,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:25,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585478028] [2024-06-14 14:08:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:25,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:25,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585478028] [2024-06-14 14:08:25,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585478028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:25,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:25,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917353386] [2024-06-14 14:08:25,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:25,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:25,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:25,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 306 transitions, 3789 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:25,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:25,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:25,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:26,506 INFO L124 PetriNetUnfolderBase]: 2486/4354 cut-off events. [2024-06-14 14:08:26,506 INFO L125 PetriNetUnfolderBase]: For 280211/280211 co-relation queries the response was YES. [2024-06-14 14:08:26,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29578 conditions, 4354 events. 2486/4354 cut-off events. For 280211/280211 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29122 event pairs, 548 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 29467. Up to 3758 conditions per place. [2024-06-14 14:08:26,549 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 241 selfloop transitions, 70 changer transitions 0/320 dead transitions. [2024-06-14 14:08:26,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 320 transitions, 4579 flow [2024-06-14 14:08:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 14:08:26,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2024-06-14 14:08:26,550 INFO L175 Difference]: Start difference. First operand has 239 places, 306 transitions, 3789 flow. Second operand 9 states and 214 transitions. [2024-06-14 14:08:26,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 320 transitions, 4579 flow [2024-06-14 14:08:27,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 320 transitions, 4457 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:27,209 INFO L231 Difference]: Finished difference. Result has 244 places, 306 transitions, 3813 flow [2024-06-14 14:08:27,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3667, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3813, PETRI_PLACES=244, PETRI_TRANSITIONS=306} [2024-06-14 14:08:27,210 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-14 14:08:27,210 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 306 transitions, 3813 flow [2024-06-14 14:08:27,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:27,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:27,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:27,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 14:08:27,211 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:27,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:27,211 INFO L85 PathProgramCache]: Analyzing trace with hash -863876695, now seen corresponding path program 7 times [2024-06-14 14:08:27,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:27,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472897098] [2024-06-14 14:08:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:27,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:27,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:27,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472897098] [2024-06-14 14:08:27,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472897098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:27,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:27,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:27,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962600179] [2024-06-14 14:08:27,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:27,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:27,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:27,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:27,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 306 transitions, 3813 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:27,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:27,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:27,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:28,094 INFO L124 PetriNetUnfolderBase]: 2483/4350 cut-off events. [2024-06-14 14:08:28,094 INFO L125 PetriNetUnfolderBase]: For 285612/285612 co-relation queries the response was YES. [2024-06-14 14:08:28,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29586 conditions, 4350 events. 2483/4350 cut-off events. For 285612/285612 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29035 event pairs, 548 based on Foata normal form. 1/4346 useless extension candidates. Maximal degree in co-relation 29473. Up to 3755 conditions per place. [2024-06-14 14:08:28,137 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 239 selfloop transitions, 69 changer transitions 0/317 dead transitions. [2024-06-14 14:08:28,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 317 transitions, 4455 flow [2024-06-14 14:08:28,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:08:28,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 14:08:28,138 INFO L175 Difference]: Start difference. First operand has 244 places, 306 transitions, 3813 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:08:28,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 317 transitions, 4455 flow [2024-06-14 14:08:28,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 317 transitions, 4184 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:28,803 INFO L231 Difference]: Finished difference. Result has 242 places, 306 transitions, 3686 flow [2024-06-14 14:08:28,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3686, PETRI_PLACES=242, PETRI_TRANSITIONS=306} [2024-06-14 14:08:28,804 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-14 14:08:28,804 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 306 transitions, 3686 flow [2024-06-14 14:08:28,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:28,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:28,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:28,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 14:08:28,805 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:28,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:28,805 INFO L85 PathProgramCache]: Analyzing trace with hash -783200349, now seen corresponding path program 1 times [2024-06-14 14:08:28,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:28,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101679887] [2024-06-14 14:08:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:28,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:29,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101679887] [2024-06-14 14:08:29,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101679887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:29,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:29,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:29,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483440625] [2024-06-14 14:08:29,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:29,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:29,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:29,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:29,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:29,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 306 transitions, 3686 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:29,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:29,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:29,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:29,623 INFO L124 PetriNetUnfolderBase]: 2388/4242 cut-off events. [2024-06-14 14:08:29,624 INFO L125 PetriNetUnfolderBase]: For 313273/313273 co-relation queries the response was YES. [2024-06-14 14:08:29,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29164 conditions, 4242 events. 2388/4242 cut-off events. For 313273/313273 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28666 event pairs, 504 based on Foata normal form. 10/4209 useless extension candidates. Maximal degree in co-relation 29050. Up to 3529 conditions per place. [2024-06-14 14:08:29,675 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 250 selfloop transitions, 31 changer transitions 0/327 dead transitions. [2024-06-14 14:08:29,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 327 transitions, 4326 flow [2024-06-14 14:08:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 14:08:29,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098484848484849 [2024-06-14 14:08:29,676 INFO L175 Difference]: Start difference. First operand has 242 places, 306 transitions, 3686 flow. Second operand 6 states and 161 transitions. [2024-06-14 14:08:29,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 327 transitions, 4326 flow [2024-06-14 14:08:30,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 327 transitions, 4188 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:30,416 INFO L231 Difference]: Finished difference. Result has 242 places, 307 transitions, 3632 flow [2024-06-14 14:08:30,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3548, 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=6, PETRI_FLOW=3632, PETRI_PLACES=242, PETRI_TRANSITIONS=307} [2024-06-14 14:08:30,417 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-14 14:08:30,417 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 307 transitions, 3632 flow [2024-06-14 14:08:30,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:30,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:30,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:30,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 14:08:30,417 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:30,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:30,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1569440735, now seen corresponding path program 2 times [2024-06-14 14:08:30,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:30,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621455843] [2024-06-14 14:08:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:30,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:30,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:30,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621455843] [2024-06-14 14:08:30,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621455843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:30,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:30,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532298347] [2024-06-14 14:08:30,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:30,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:30,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:30,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:30,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:30,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 307 transitions, 3632 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:30,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:30,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:30,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:31,262 INFO L124 PetriNetUnfolderBase]: 2419/4277 cut-off events. [2024-06-14 14:08:31,262 INFO L125 PetriNetUnfolderBase]: For 321227/321227 co-relation queries the response was YES. [2024-06-14 14:08:31,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29438 conditions, 4277 events. 2419/4277 cut-off events. For 321227/321227 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28988 event pairs, 514 based on Foata normal form. 9/4238 useless extension candidates. Maximal degree in co-relation 29323. Up to 3578 conditions per place. [2024-06-14 14:08:31,306 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 246 selfloop transitions, 31 changer transitions 0/323 dead transitions. [2024-06-14 14:08:31,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 323 transitions, 4252 flow [2024-06-14 14:08:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:08:31,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:08:31,307 INFO L175 Difference]: Start difference. First operand has 242 places, 307 transitions, 3632 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:08:31,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 323 transitions, 4252 flow [2024-06-14 14:08:32,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 323 transitions, 4186 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:32,032 INFO L231 Difference]: Finished difference. Result has 245 places, 308 transitions, 3652 flow [2024-06-14 14:08:32,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3652, PETRI_PLACES=245, PETRI_TRANSITIONS=308} [2024-06-14 14:08:32,032 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-14 14:08:32,032 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 308 transitions, 3652 flow [2024-06-14 14:08:32,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:32,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:32,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:32,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 14:08:32,033 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:32,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:32,033 INFO L85 PathProgramCache]: Analyzing trace with hash -846724023, now seen corresponding path program 3 times [2024-06-14 14:08:32,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:32,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584798878] [2024-06-14 14:08:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:32,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:32,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:32,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584798878] [2024-06-14 14:08:32,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584798878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:32,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:32,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:32,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688274364] [2024-06-14 14:08:32,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:32,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:32,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:32,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:32,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:32,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 308 transitions, 3652 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:32,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:32,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:32,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:32,894 INFO L124 PetriNetUnfolderBase]: 2421/4289 cut-off events. [2024-06-14 14:08:32,894 INFO L125 PetriNetUnfolderBase]: For 313824/313824 co-relation queries the response was YES. [2024-06-14 14:08:32,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29258 conditions, 4289 events. 2421/4289 cut-off events. For 313824/313824 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29096 event pairs, 508 based on Foata normal form. 8/4252 useless extension candidates. Maximal degree in co-relation 29142. Up to 3518 conditions per place. [2024-06-14 14:08:32,940 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 248 selfloop transitions, 34 changer transitions 0/328 dead transitions. [2024-06-14 14:08:32,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 328 transitions, 4304 flow [2024-06-14 14:08:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:08:32,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 14:08:32,941 INFO L175 Difference]: Start difference. First operand has 245 places, 308 transitions, 3652 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:08:32,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 328 transitions, 4304 flow [2024-06-14 14:08:33,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 328 transitions, 4236 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:33,560 INFO L231 Difference]: Finished difference. Result has 248 places, 309 transitions, 3676 flow [2024-06-14 14:08:33,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3676, PETRI_PLACES=248, PETRI_TRANSITIONS=309} [2024-06-14 14:08:33,560 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-14 14:08:33,560 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 309 transitions, 3676 flow [2024-06-14 14:08:33,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:33,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:33,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:33,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 14:08:33,560 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:33,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1230397439, now seen corresponding path program 1 times [2024-06-14 14:08:33,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:33,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636499356] [2024-06-14 14:08:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:33,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:33,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:33,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636499356] [2024-06-14 14:08:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636499356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:33,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:33,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:33,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201539583] [2024-06-14 14:08:33,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:33,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:33,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:33,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:33,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:33,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 309 transitions, 3676 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:33,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:33,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:33,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:34,528 INFO L124 PetriNetUnfolderBase]: 2573/4516 cut-off events. [2024-06-14 14:08:34,529 INFO L125 PetriNetUnfolderBase]: For 311822/311822 co-relation queries the response was YES. [2024-06-14 14:08:34,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30387 conditions, 4516 events. 2573/4516 cut-off events. For 311822/311822 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30325 event pairs, 468 based on Foata normal form. 4/4519 useless extension candidates. Maximal degree in co-relation 30270. Up to 3855 conditions per place. [2024-06-14 14:08:34,574 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 293 selfloop transitions, 33 changer transitions 0/335 dead transitions. [2024-06-14 14:08:34,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 335 transitions, 4581 flow [2024-06-14 14:08:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:08:34,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 14:08:34,575 INFO L175 Difference]: Start difference. First operand has 248 places, 309 transitions, 3676 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:08:34,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 335 transitions, 4581 flow [2024-06-14 14:08:35,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 335 transitions, 4503 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:35,311 INFO L231 Difference]: Finished difference. Result has 249 places, 312 transitions, 3725 flow [2024-06-14 14:08:35,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3725, PETRI_PLACES=249, PETRI_TRANSITIONS=312} [2024-06-14 14:08:35,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-14 14:08:35,312 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 312 transitions, 3725 flow [2024-06-14 14:08:35,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:35,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:35,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:35,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 14:08:35,312 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:35,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash -187631235, now seen corresponding path program 2 times [2024-06-14 14:08:35,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:35,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722460748] [2024-06-14 14:08:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:35,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:35,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:35,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722460748] [2024-06-14 14:08:35,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722460748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:35,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:35,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:35,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190242359] [2024-06-14 14:08:35,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:35,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:35,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:35,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:35,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:35,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:35,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 312 transitions, 3725 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:35,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:35,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:35,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:36,244 INFO L124 PetriNetUnfolderBase]: 2553/4480 cut-off events. [2024-06-14 14:08:36,244 INFO L125 PetriNetUnfolderBase]: For 308123/308123 co-relation queries the response was YES. [2024-06-14 14:08:36,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29928 conditions, 4480 events. 2553/4480 cut-off events. For 308123/308123 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30085 event pairs, 529 based on Foata normal form. 4/4483 useless extension candidates. Maximal degree in co-relation 29810. Up to 3929 conditions per place. [2024-06-14 14:08:36,294 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 293 selfloop transitions, 28 changer transitions 0/330 dead transitions. [2024-06-14 14:08:36,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 330 transitions, 4411 flow [2024-06-14 14:08:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:08:36,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:08:36,295 INFO L175 Difference]: Start difference. First operand has 249 places, 312 transitions, 3725 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:08:36,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 330 transitions, 4411 flow [2024-06-14 14:08:36,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 330 transitions, 4310 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:36,937 INFO L231 Difference]: Finished difference. Result has 252 places, 312 transitions, 3686 flow [2024-06-14 14:08:36,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3686, PETRI_PLACES=252, PETRI_TRANSITIONS=312} [2024-06-14 14:08:36,937 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-14 14:08:36,937 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 312 transitions, 3686 flow [2024-06-14 14:08:36,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:36,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:36,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:36,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 14:08:36,938 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:36,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1233259359, now seen corresponding path program 1 times [2024-06-14 14:08:36,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:36,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691444691] [2024-06-14 14:08:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:36,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:37,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:37,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691444691] [2024-06-14 14:08:37,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691444691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:37,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:37,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:37,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998122234] [2024-06-14 14:08:37,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:37,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:37,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:37,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:37,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 312 transitions, 3686 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:37,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:37,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:37,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:37,862 INFO L124 PetriNetUnfolderBase]: 2581/4529 cut-off events. [2024-06-14 14:08:37,862 INFO L125 PetriNetUnfolderBase]: For 313044/313044 co-relation queries the response was YES. [2024-06-14 14:08:37,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30154 conditions, 4529 events. 2581/4529 cut-off events. For 313044/313044 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30476 event pairs, 528 based on Foata normal form. 2/4530 useless extension candidates. Maximal degree in co-relation 30035. Up to 3956 conditions per place. [2024-06-14 14:08:37,910 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 294 selfloop transitions, 40 changer transitions 0/343 dead transitions. [2024-06-14 14:08:37,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 343 transitions, 4687 flow [2024-06-14 14:08:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:37,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:08:37,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 14:08:37,911 INFO L175 Difference]: Start difference. First operand has 252 places, 312 transitions, 3686 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:08:37,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 343 transitions, 4687 flow [2024-06-14 14:08:38,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 343 transitions, 4601 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:38,724 INFO L231 Difference]: Finished difference. Result has 253 places, 325 transitions, 3872 flow [2024-06-14 14:08:38,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3872, PETRI_PLACES=253, PETRI_TRANSITIONS=325} [2024-06-14 14:08:38,724 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-14 14:08:38,724 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 325 transitions, 3872 flow [2024-06-14 14:08:38,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:38,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:38,724 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] [2024-06-14 14:08:38,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 14:08:38,725 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:38,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1514184703, now seen corresponding path program 3 times [2024-06-14 14:08:38,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:38,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416549254] [2024-06-14 14:08:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:38,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:38,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:38,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416549254] [2024-06-14 14:08:38,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416549254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:38,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:38,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:38,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194387452] [2024-06-14 14:08:38,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:38,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:38,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:38,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:39,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:39,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 325 transitions, 3872 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:39,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:39,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:39,753 INFO L124 PetriNetUnfolderBase]: 2597/4546 cut-off events. [2024-06-14 14:08:39,754 INFO L125 PetriNetUnfolderBase]: For 330726/330726 co-relation queries the response was YES. [2024-06-14 14:08:39,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31012 conditions, 4546 events. 2597/4546 cut-off events. For 330726/330726 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30558 event pairs, 538 based on Foata normal form. 4/4545 useless extension candidates. Maximal degree in co-relation 30891. Up to 3892 conditions per place. [2024-06-14 14:08:39,797 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 268 selfloop transitions, 71 changer transitions 0/348 dead transitions. [2024-06-14 14:08:39,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 348 transitions, 4696 flow [2024-06-14 14:08:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 14:08:39,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-06-14 14:08:39,798 INFO L175 Difference]: Start difference. First operand has 253 places, 325 transitions, 3872 flow. Second operand 9 states and 219 transitions. [2024-06-14 14:08:39,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 348 transitions, 4696 flow [2024-06-14 14:08:40,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 348 transitions, 4632 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:40,441 INFO L231 Difference]: Finished difference. Result has 259 places, 328 transitions, 4060 flow [2024-06-14 14:08:40,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3808, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4060, PETRI_PLACES=259, PETRI_TRANSITIONS=328} [2024-06-14 14:08:40,442 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-14 14:08:40,442 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 328 transitions, 4060 flow [2024-06-14 14:08:40,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:40,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:40,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:40,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 14:08:40,442 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:40,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1514189663, now seen corresponding path program 2 times [2024-06-14 14:08:40,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:40,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546306042] [2024-06-14 14:08:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:40,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:40,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546306042] [2024-06-14 14:08:40,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546306042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:40,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:40,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:40,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666514458] [2024-06-14 14:08:40,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:40,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:40,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:40,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:40,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:40,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:40,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 328 transitions, 4060 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:40,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:40,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:40,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:41,390 INFO L124 PetriNetUnfolderBase]: 2631/4601 cut-off events. [2024-06-14 14:08:41,390 INFO L125 PetriNetUnfolderBase]: For 343152/343152 co-relation queries the response was YES. [2024-06-14 14:08:41,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32020 conditions, 4601 events. 2631/4601 cut-off events. For 343152/343152 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31052 event pairs, 541 based on Foata normal form. 2/4596 useless extension candidates. Maximal degree in co-relation 31897. Up to 3812 conditions per place. [2024-06-14 14:08:41,441 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 238 selfloop transitions, 118 changer transitions 0/365 dead transitions. [2024-06-14 14:08:41,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 365 transitions, 5530 flow [2024-06-14 14:08:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-14 14:08:41,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-14 14:08:41,442 INFO L175 Difference]: Start difference. First operand has 259 places, 328 transitions, 4060 flow. Second operand 9 states and 228 transitions. [2024-06-14 14:08:41,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 365 transitions, 5530 flow [2024-06-14 14:08:42,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 365 transitions, 5300 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:42,142 INFO L231 Difference]: Finished difference. Result has 262 places, 342 transitions, 4311 flow [2024-06-14 14:08:42,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4311, PETRI_PLACES=262, PETRI_TRANSITIONS=342} [2024-06-14 14:08:42,142 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-14 14:08:42,142 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 342 transitions, 4311 flow [2024-06-14 14:08:42,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:42,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:42,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 14:08:42,143 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:42,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1520855903, now seen corresponding path program 3 times [2024-06-14 14:08:42,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:42,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773526488] [2024-06-14 14:08:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:42,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:42,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:42,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773526488] [2024-06-14 14:08:42,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773526488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:42,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:42,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:42,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52792314] [2024-06-14 14:08:42,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:42,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:42,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:42,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:42,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 342 transitions, 4311 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:42,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:42,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:43,125 INFO L124 PetriNetUnfolderBase]: 2625/4593 cut-off events. [2024-06-14 14:08:43,125 INFO L125 PetriNetUnfolderBase]: For 344777/344777 co-relation queries the response was YES. [2024-06-14 14:08:43,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32177 conditions, 4593 events. 2625/4593 cut-off events. For 344777/344777 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30993 event pairs, 541 based on Foata normal form. 2/4588 useless extension candidates. Maximal degree in co-relation 32052. Up to 3807 conditions per place. [2024-06-14 14:08:43,179 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 233 selfloop transitions, 123 changer transitions 0/365 dead transitions. [2024-06-14 14:08:43,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 365 transitions, 5419 flow [2024-06-14 14:08:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:08:43,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 14:08:43,180 INFO L175 Difference]: Start difference. First operand has 262 places, 342 transitions, 4311 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:08:43,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 365 transitions, 5419 flow [2024-06-14 14:08:43,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 365 transitions, 5193 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:43,917 INFO L231 Difference]: Finished difference. Result has 269 places, 342 transitions, 4339 flow [2024-06-14 14:08:43,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4339, PETRI_PLACES=269, PETRI_TRANSITIONS=342} [2024-06-14 14:08:43,917 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-14 14:08:43,917 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 342 transitions, 4339 flow [2024-06-14 14:08:43,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:43,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:43,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:43,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 14:08:43,918 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:43,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:43,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1520864831, now seen corresponding path program 1 times [2024-06-14 14:08:43,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:43,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032706223] [2024-06-14 14:08:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:43,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:44,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:44,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032706223] [2024-06-14 14:08:44,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032706223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:44,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:44,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:44,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962833123] [2024-06-14 14:08:44,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:44,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:44,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:44,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:44,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:44,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 342 transitions, 4339 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:44,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:44,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:44,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:44,842 INFO L124 PetriNetUnfolderBase]: 2641/4617 cut-off events. [2024-06-14 14:08:44,842 INFO L125 PetriNetUnfolderBase]: For 358235/358235 co-relation queries the response was YES. [2024-06-14 14:08:44,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32341 conditions, 4617 events. 2641/4617 cut-off events. For 358235/358235 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31158 event pairs, 542 based on Foata normal form. 4/4614 useless extension candidates. Maximal degree in co-relation 32214. Up to 3975 conditions per place. [2024-06-14 14:08:44,897 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 277 selfloop transitions, 74 changer transitions 0/360 dead transitions. [2024-06-14 14:08:44,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 360 transitions, 5147 flow [2024-06-14 14:08:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:08:44,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:08:44,898 INFO L175 Difference]: Start difference. First operand has 269 places, 342 transitions, 4339 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:08:44,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 360 transitions, 5147 flow [2024-06-14 14:08:45,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 360 transitions, 4894 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:45,885 INFO L231 Difference]: Finished difference. Result has 268 places, 345 transitions, 4317 flow [2024-06-14 14:08:45,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4317, PETRI_PLACES=268, PETRI_TRANSITIONS=345} [2024-06-14 14:08:45,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-14 14:08:45,886 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 345 transitions, 4317 flow [2024-06-14 14:08:45,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:45,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:45,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:45,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 14:08:45,886 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:45,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:45,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1133720351, now seen corresponding path program 4 times [2024-06-14 14:08:45,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:45,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945171259] [2024-06-14 14:08:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:45,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:46,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:46,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945171259] [2024-06-14 14:08:46,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945171259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:46,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:46,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:46,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660789530] [2024-06-14 14:08:46,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:46,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:46,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:46,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:46,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:46,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:46,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 345 transitions, 4317 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:46,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:46,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:46,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:46,870 INFO L124 PetriNetUnfolderBase]: 2644/4615 cut-off events. [2024-06-14 14:08:46,870 INFO L125 PetriNetUnfolderBase]: For 362508/362508 co-relation queries the response was YES. [2024-06-14 14:08:46,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32324 conditions, 4615 events. 2644/4615 cut-off events. For 362508/362508 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31154 event pairs, 550 based on Foata normal form. 4/4614 useless extension candidates. Maximal degree in co-relation 32196. Up to 3960 conditions per place. [2024-06-14 14:08:46,926 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 282 selfloop transitions, 74 changer transitions 0/365 dead transitions. [2024-06-14 14:08:46,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 365 transitions, 5181 flow [2024-06-14 14:08:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 14:08:46,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547979797979798 [2024-06-14 14:08:46,927 INFO L175 Difference]: Start difference. First operand has 268 places, 345 transitions, 4317 flow. Second operand 9 states and 217 transitions. [2024-06-14 14:08:46,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 365 transitions, 5181 flow [2024-06-14 14:08:47,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 365 transitions, 4974 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:47,806 INFO L231 Difference]: Finished difference. Result has 272 places, 348 transitions, 4382 flow [2024-06-14 14:08:47,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4110, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4382, PETRI_PLACES=272, PETRI_TRANSITIONS=348} [2024-06-14 14:08:47,806 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 227 predicate places. [2024-06-14 14:08:47,806 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 348 transitions, 4382 flow [2024-06-14 14:08:47,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:47,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:47,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 14:08:47,807 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:47,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1049615521, now seen corresponding path program 4 times [2024-06-14 14:08:47,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:47,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482997321] [2024-06-14 14:08:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:47,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:48,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:48,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482997321] [2024-06-14 14:08:48,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482997321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:48,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:48,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998921224] [2024-06-14 14:08:48,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:48,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:48,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:48,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:48,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:48,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:48,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 348 transitions, 4382 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:48,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:48,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:48,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:48,909 INFO L124 PetriNetUnfolderBase]: 2678/4668 cut-off events. [2024-06-14 14:08:48,909 INFO L125 PetriNetUnfolderBase]: For 374733/374733 co-relation queries the response was YES. [2024-06-14 14:08:48,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33028 conditions, 4668 events. 2678/4668 cut-off events. For 374733/374733 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31514 event pairs, 559 based on Foata normal form. 2/4665 useless extension candidates. Maximal degree in co-relation 32899. Up to 3870 conditions per place. [2024-06-14 14:08:48,970 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 238 selfloop transitions, 135 changer transitions 0/382 dead transitions. [2024-06-14 14:08:48,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 382 transitions, 6048 flow [2024-06-14 14:08:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-14 14:08:48,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5557851239669421 [2024-06-14 14:08:48,972 INFO L175 Difference]: Start difference. First operand has 272 places, 348 transitions, 4382 flow. Second operand 11 states and 269 transitions. [2024-06-14 14:08:48,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 382 transitions, 6048 flow [2024-06-14 14:08:49,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 382 transitions, 5798 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:49,805 INFO L231 Difference]: Finished difference. Result has 276 places, 360 transitions, 4633 flow [2024-06-14 14:08:49,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4633, PETRI_PLACES=276, PETRI_TRANSITIONS=360} [2024-06-14 14:08:49,805 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-14 14:08:49,805 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 360 transitions, 4633 flow [2024-06-14 14:08:49,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:49,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:49,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:49,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 14:08:49,806 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:49,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:49,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1056281761, now seen corresponding path program 5 times [2024-06-14 14:08:49,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:49,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296013968] [2024-06-14 14:08:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:49,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:50,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:50,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296013968] [2024-06-14 14:08:50,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296013968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:50,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:50,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624935009] [2024-06-14 14:08:50,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:50,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:50,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:50,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:50,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 360 transitions, 4633 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:50,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:50,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:50,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:50,777 INFO L124 PetriNetUnfolderBase]: 2672/4660 cut-off events. [2024-06-14 14:08:50,777 INFO L125 PetriNetUnfolderBase]: For 373633/373633 co-relation queries the response was YES. [2024-06-14 14:08:50,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32795 conditions, 4660 events. 2672/4660 cut-off events. For 373633/373633 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31448 event pairs, 559 based on Foata normal form. 2/4657 useless extension candidates. Maximal degree in co-relation 32665. Up to 3865 conditions per place. [2024-06-14 14:08:50,830 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 236 selfloop transitions, 134 changer transitions 0/379 dead transitions. [2024-06-14 14:08:50,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 379 transitions, 5909 flow [2024-06-14 14:08:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 14:08:50,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707070707070707 [2024-06-14 14:08:50,831 INFO L175 Difference]: Start difference. First operand has 276 places, 360 transitions, 4633 flow. Second operand 9 states and 226 transitions. [2024-06-14 14:08:50,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 379 transitions, 5909 flow [2024-06-14 14:08:51,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 379 transitions, 5522 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:51,688 INFO L231 Difference]: Finished difference. Result has 277 places, 360 transitions, 4521 flow [2024-06-14 14:08:51,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4246, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4521, PETRI_PLACES=277, PETRI_TRANSITIONS=360} [2024-06-14 14:08:51,689 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-14 14:08:51,689 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 360 transitions, 4521 flow [2024-06-14 14:08:51,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:51,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:51,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:51,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 14:08:51,689 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:51,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:51,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1408484865, now seen corresponding path program 6 times [2024-06-14 14:08:51,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:51,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066080257] [2024-06-14 14:08:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:51,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066080257] [2024-06-14 14:08:51,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066080257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:51,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:51,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:51,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930331528] [2024-06-14 14:08:51,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:51,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:51,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 360 transitions, 4521 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:51,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:51,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:51,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:52,658 INFO L124 PetriNetUnfolderBase]: 2666/4652 cut-off events. [2024-06-14 14:08:52,658 INFO L125 PetriNetUnfolderBase]: For 372762/372762 co-relation queries the response was YES. [2024-06-14 14:08:52,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32513 conditions, 4652 events. 2666/4652 cut-off events. For 372762/372762 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31397 event pairs, 559 based on Foata normal form. 2/4649 useless extension candidates. Maximal degree in co-relation 32383. Up to 3860 conditions per place. [2024-06-14 14:08:52,713 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 229 selfloop transitions, 141 changer transitions 0/379 dead transitions. [2024-06-14 14:08:52,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 379 transitions, 5637 flow [2024-06-14 14:08:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-14 14:08:52,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522727272727272 [2024-06-14 14:08:52,714 INFO L175 Difference]: Start difference. First operand has 277 places, 360 transitions, 4521 flow. Second operand 10 states and 243 transitions. [2024-06-14 14:08:52,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 379 transitions, 5637 flow [2024-06-14 14:08:53,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 379 transitions, 5335 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:53,635 INFO L231 Difference]: Finished difference. Result has 279 places, 360 transitions, 4508 flow [2024-06-14 14:08:53,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4219, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4508, PETRI_PLACES=279, PETRI_TRANSITIONS=360} [2024-06-14 14:08:53,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-14 14:08:53,635 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 360 transitions, 4508 flow [2024-06-14 14:08:53,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:53,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:53,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 14:08:53,636 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:53,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1049606593, now seen corresponding path program 2 times [2024-06-14 14:08:53,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:53,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067176446] [2024-06-14 14:08:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:53,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067176446] [2024-06-14 14:08:53,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067176446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:53,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:53,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393034481] [2024-06-14 14:08:53,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:53,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:53,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 360 transitions, 4508 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:53,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:53,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:54,552 INFO L124 PetriNetUnfolderBase]: 2682/4676 cut-off events. [2024-06-14 14:08:54,553 INFO L125 PetriNetUnfolderBase]: For 388826/388826 co-relation queries the response was YES. [2024-06-14 14:08:54,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32832 conditions, 4676 events. 2682/4676 cut-off events. For 388826/388826 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 31549 event pairs, 560 based on Foata normal form. 4/4675 useless extension candidates. Maximal degree in co-relation 32701. Up to 4037 conditions per place. [2024-06-14 14:08:54,606 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 290 selfloop transitions, 76 changer transitions 0/375 dead transitions. [2024-06-14 14:08:54,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 375 transitions, 5344 flow [2024-06-14 14:08:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:08:54,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-14 14:08:54,607 INFO L175 Difference]: Start difference. First operand has 279 places, 360 transitions, 4508 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:08:54,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 375 transitions, 5344 flow [2024-06-14 14:08:55,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 375 transitions, 5022 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:08:55,488 INFO L231 Difference]: Finished difference. Result has 276 places, 363 transitions, 4426 flow [2024-06-14 14:08:55,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4186, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4426, PETRI_PLACES=276, PETRI_TRANSITIONS=363} [2024-06-14 14:08:55,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-14 14:08:55,488 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 363 transitions, 4426 flow [2024-06-14 14:08:55,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:55,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:55,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:55,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 14:08:55,488 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:55,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:55,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1402925505, now seen corresponding path program 3 times [2024-06-14 14:08:55,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:55,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50208551] [2024-06-14 14:08:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:55,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:55,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:55,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50208551] [2024-06-14 14:08:55,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50208551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:55,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:55,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866027369] [2024-06-14 14:08:55,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:55,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:55,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:55,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:55,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:55,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:55,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 363 transitions, 4426 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:55,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:55,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:55,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:56,448 INFO L124 PetriNetUnfolderBase]: 2698/4708 cut-off events. [2024-06-14 14:08:56,448 INFO L125 PetriNetUnfolderBase]: For 398620/398620 co-relation queries the response was YES. [2024-06-14 14:08:56,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33047 conditions, 4708 events. 2698/4708 cut-off events. For 398620/398620 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31861 event pairs, 564 based on Foata normal form. 4/4707 useless extension candidates. Maximal degree in co-relation 32916. Up to 4061 conditions per place. [2024-06-14 14:08:56,503 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 291 selfloop transitions, 78 changer transitions 0/378 dead transitions. [2024-06-14 14:08:56,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 378 transitions, 5274 flow [2024-06-14 14:08:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:08:56,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 14:08:56,504 INFO L175 Difference]: Start difference. First operand has 276 places, 363 transitions, 4426 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:08:56,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 378 transitions, 5274 flow [2024-06-14 14:08:57,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 378 transitions, 5056 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:57,422 INFO L231 Difference]: Finished difference. Result has 278 places, 366 transitions, 4458 flow [2024-06-14 14:08:57,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4458, PETRI_PLACES=278, PETRI_TRANSITIONS=366} [2024-06-14 14:08:57,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-14 14:08:57,423 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 366 transitions, 4458 flow [2024-06-14 14:08:57,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:57,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:57,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:57,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 14:08:57,423 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:57,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1392449985, now seen corresponding path program 4 times [2024-06-14 14:08:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:57,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658837515] [2024-06-14 14:08:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:57,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:57,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:57,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658837515] [2024-06-14 14:08:57,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658837515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:57,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:57,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:57,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963682829] [2024-06-14 14:08:57,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:57,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:57,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:57,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:57,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:57,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 366 transitions, 4458 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:57,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:57,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:57,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:58,359 INFO L124 PetriNetUnfolderBase]: 2701/4717 cut-off events. [2024-06-14 14:08:58,359 INFO L125 PetriNetUnfolderBase]: For 400092/400092 co-relation queries the response was YES. [2024-06-14 14:08:58,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33005 conditions, 4717 events. 2701/4717 cut-off events. For 400092/400092 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31955 event pairs, 551 based on Foata normal form. 4/4716 useless extension candidates. Maximal degree in co-relation 32873. Up to 4012 conditions per place. [2024-06-14 14:08:58,416 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 286 selfloop transitions, 89 changer transitions 0/384 dead transitions. [2024-06-14 14:08:58,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 384 transitions, 5362 flow [2024-06-14 14:08:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:08:58,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-14 14:08:58,417 INFO L175 Difference]: Start difference. First operand has 278 places, 366 transitions, 4458 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:08:58,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 384 transitions, 5362 flow [2024-06-14 14:08:59,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 384 transitions, 5134 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:59,539 INFO L231 Difference]: Finished difference. Result has 281 places, 371 transitions, 4563 flow [2024-06-14 14:08:59,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4230, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4563, PETRI_PLACES=281, PETRI_TRANSITIONS=371} [2024-06-14 14:08:59,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-14 14:08:59,540 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 371 transitions, 4563 flow [2024-06-14 14:08:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:59,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:59,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:59,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 14:08:59,540 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:59,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash -610545984, now seen corresponding path program 1 times [2024-06-14 14:08:59,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:59,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575515259] [2024-06-14 14:08:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:59,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:59,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575515259] [2024-06-14 14:08:59,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575515259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:59,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:59,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:59,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656770399] [2024-06-14 14:08:59,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:59,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:59,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:59,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:59,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 371 transitions, 4563 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) [2024-06-14 14:08:59,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:59,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:59,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:00,533 INFO L124 PetriNetUnfolderBase]: 2735/4775 cut-off events. [2024-06-14 14:09:00,534 INFO L125 PetriNetUnfolderBase]: For 421546/421546 co-relation queries the response was YES. [2024-06-14 14:09:00,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34278 conditions, 4775 events. 2735/4775 cut-off events. For 421546/421546 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32358 event pairs, 447 based on Foata normal form. 2/4769 useless extension candidates. Maximal degree in co-relation 34144. Up to 4001 conditions per place. [2024-06-14 14:09:00,595 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 336 selfloop transitions, 57 changer transitions 0/402 dead transitions. [2024-06-14 14:09:00,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 402 transitions, 6009 flow [2024-06-14 14:09:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:09:00,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-14 14:09:00,596 INFO L175 Difference]: Start difference. First operand has 281 places, 371 transitions, 4563 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:09:00,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 402 transitions, 6009 flow [2024-06-14 14:09:01,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 402 transitions, 5813 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:01,634 INFO L231 Difference]: Finished difference. Result has 285 places, 377 transitions, 4742 flow [2024-06-14 14:09:01,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4367, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4742, PETRI_PLACES=285, PETRI_TRANSITIONS=377} [2024-06-14 14:09:01,634 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-14 14:09:01,634 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 377 transitions, 4742 flow [2024-06-14 14:09:01,634 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) [2024-06-14 14:09:01,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:01,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:01,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 14:09:01,634 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:01,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:01,635 INFO L85 PathProgramCache]: Analyzing trace with hash -751762942, now seen corresponding path program 2 times [2024-06-14 14:09:01,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:01,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121014735] [2024-06-14 14:09:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:01,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:01,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121014735] [2024-06-14 14:09:01,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121014735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:01,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:01,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:01,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806062585] [2024-06-14 14:09:01,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:01,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:01,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:01,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:01,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:01,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 377 transitions, 4742 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) [2024-06-14 14:09:01,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:01,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:01,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:02,660 INFO L124 PetriNetUnfolderBase]: 2756/4810 cut-off events. [2024-06-14 14:09:02,660 INFO L125 PetriNetUnfolderBase]: For 441239/441239 co-relation queries the response was YES. [2024-06-14 14:09:02,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35073 conditions, 4810 events. 2756/4810 cut-off events. For 441239/441239 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32646 event pairs, 453 based on Foata normal form. 2/4804 useless extension candidates. Maximal degree in co-relation 34937. Up to 4021 conditions per place. [2024-06-14 14:09:02,710 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 333 selfloop transitions, 61 changer transitions 0/403 dead transitions. [2024-06-14 14:09:02,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 403 transitions, 6110 flow [2024-06-14 14:09:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:09:02,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 14:09:02,711 INFO L175 Difference]: Start difference. First operand has 285 places, 377 transitions, 4742 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:09:02,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 403 transitions, 6110 flow [2024-06-14 14:09:03,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 403 transitions, 5873 flow, removed 96 selfloop flow, removed 2 redundant places. [2024-06-14 14:09:03,847 INFO L231 Difference]: Finished difference. Result has 290 places, 381 transitions, 4808 flow [2024-06-14 14:09:03,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4808, PETRI_PLACES=290, PETRI_TRANSITIONS=381} [2024-06-14 14:09:03,847 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-14 14:09:03,847 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 381 transitions, 4808 flow [2024-06-14 14:09:03,847 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) [2024-06-14 14:09:03,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:03,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:03,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 14:09:03,847 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:03,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash -700336732, now seen corresponding path program 3 times [2024-06-14 14:09:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:03,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993988842] [2024-06-14 14:09:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:03,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993988842] [2024-06-14 14:09:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993988842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:04,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407641084] [2024-06-14 14:09:04,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:04,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:04,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:04,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:04,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:04,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 381 transitions, 4808 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) [2024-06-14 14:09:04,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:04,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:04,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:04,856 INFO L124 PetriNetUnfolderBase]: 2751/4803 cut-off events. [2024-06-14 14:09:04,856 INFO L125 PetriNetUnfolderBase]: For 437873/437873 co-relation queries the response was YES. [2024-06-14 14:09:04,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34635 conditions, 4803 events. 2751/4803 cut-off events. For 437873/437873 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32718 event pairs, 548 based on Foata normal form. 2/4790 useless extension candidates. Maximal degree in co-relation 34497. Up to 4125 conditions per place. [2024-06-14 14:09:04,917 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 344 selfloop transitions, 47 changer transitions 0/400 dead transitions. [2024-06-14 14:09:04,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 400 transitions, 5814 flow [2024-06-14 14:09:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:09:04,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 14:09:04,918 INFO L175 Difference]: Start difference. First operand has 290 places, 381 transitions, 4808 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:09:04,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 400 transitions, 5814 flow [2024-06-14 14:09:06,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 400 transitions, 5618 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:06,306 INFO L231 Difference]: Finished difference. Result has 293 places, 381 transitions, 4711 flow [2024-06-14 14:09:06,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4612, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4711, PETRI_PLACES=293, PETRI_TRANSITIONS=381} [2024-06-14 14:09:06,307 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 248 predicate places. [2024-06-14 14:09:06,307 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 381 transitions, 4711 flow [2024-06-14 14:09:06,307 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) [2024-06-14 14:09:06,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:06,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 14:09:06,308 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:06,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1096295422, now seen corresponding path program 4 times [2024-06-14 14:09:06,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:06,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165471934] [2024-06-14 14:09:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:06,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:06,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:06,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165471934] [2024-06-14 14:09:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165471934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:06,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656322981] [2024-06-14 14:09:06,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:06,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:06,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 381 transitions, 4711 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) [2024-06-14 14:09:06,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:06,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:06,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:07,356 INFO L124 PetriNetUnfolderBase]: 2759/4822 cut-off events. [2024-06-14 14:09:07,356 INFO L125 PetriNetUnfolderBase]: For 446142/446142 co-relation queries the response was YES. [2024-06-14 14:09:07,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34660 conditions, 4822 events. 2759/4822 cut-off events. For 446142/446142 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32890 event pairs, 557 based on Foata normal form. 2/4816 useless extension candidates. Maximal degree in co-relation 34521. Up to 4174 conditions per place. [2024-06-14 14:09:07,413 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 341 selfloop transitions, 47 changer transitions 0/397 dead transitions. [2024-06-14 14:09:07,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 397 transitions, 5589 flow [2024-06-14 14:09:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 14:09:07,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:09:07,414 INFO L175 Difference]: Start difference. First operand has 293 places, 381 transitions, 4711 flow. Second operand 6 states and 154 transitions. [2024-06-14 14:09:07,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 397 transitions, 5589 flow [2024-06-14 14:09:08,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 397 transitions, 5470 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:08,766 INFO L231 Difference]: Finished difference. Result has 294 places, 383 transitions, 4763 flow [2024-06-14 14:09:08,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4598, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4763, PETRI_PLACES=294, PETRI_TRANSITIONS=383} [2024-06-14 14:09:08,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-14 14:09:08,767 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 383 transitions, 4763 flow [2024-06-14 14:09:08,767 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) [2024-06-14 14:09:08,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:08,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:08,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 14:09:08,767 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:08,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1550791420, now seen corresponding path program 5 times [2024-06-14 14:09:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457693483] [2024-06-14 14:09:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:09,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:09,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457693483] [2024-06-14 14:09:09,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457693483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:09,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:09,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:09,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283904012] [2024-06-14 14:09:09,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:09,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:09,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:09,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:09,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:09,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 383 transitions, 4763 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) [2024-06-14 14:09:09,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:09,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:09,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:09,775 INFO L124 PetriNetUnfolderBase]: 2754/4816 cut-off events. [2024-06-14 14:09:09,775 INFO L125 PetriNetUnfolderBase]: For 446493/446493 co-relation queries the response was YES. [2024-06-14 14:09:09,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34460 conditions, 4816 events. 2754/4816 cut-off events. For 446493/446493 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32871 event pairs, 553 based on Foata normal form. 2/4813 useless extension candidates. Maximal degree in co-relation 34320. Up to 4167 conditions per place. [2024-06-14 14:09:09,833 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 338 selfloop transitions, 52 changer transitions 0/399 dead transitions. [2024-06-14 14:09:09,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 399 transitions, 5581 flow [2024-06-14 14:09:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:09:09,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:09:09,834 INFO L175 Difference]: Start difference. First operand has 294 places, 383 transitions, 4763 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:09:09,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 399 transitions, 5581 flow [2024-06-14 14:09:11,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 399 transitions, 5392 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:11,086 INFO L231 Difference]: Finished difference. Result has 298 places, 383 transitions, 4683 flow [2024-06-14 14:09:11,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4683, PETRI_PLACES=298, PETRI_TRANSITIONS=383} [2024-06-14 14:09:11,087 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-14 14:09:11,087 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 383 transitions, 4683 flow [2024-06-14 14:09:11,087 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) [2024-06-14 14:09:11,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:11,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:11,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 14:09:11,087 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:11,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1450774622, now seen corresponding path program 6 times [2024-06-14 14:09:11,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:11,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326848440] [2024-06-14 14:09:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:11,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:11,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:11,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326848440] [2024-06-14 14:09:11,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326848440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:11,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:11,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:11,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079262973] [2024-06-14 14:09:11,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:11,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:11,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:11,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:11,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:11,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:11,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 383 transitions, 4683 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) [2024-06-14 14:09:11,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:11,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:11,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:12,069 INFO L124 PetriNetUnfolderBase]: 2749/4809 cut-off events. [2024-06-14 14:09:12,069 INFO L125 PetriNetUnfolderBase]: For 444972/444972 co-relation queries the response was YES. [2024-06-14 14:09:12,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34129 conditions, 4809 events. 2749/4809 cut-off events. For 444972/444972 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32809 event pairs, 550 based on Foata normal form. 2/4806 useless extension candidates. Maximal degree in co-relation 33988. Up to 4140 conditions per place. [2024-06-14 14:09:12,130 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 333 selfloop transitions, 58 changer transitions 0/400 dead transitions. [2024-06-14 14:09:12,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 400 transitions, 5505 flow [2024-06-14 14:09:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 14:09:12,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 14:09:12,131 INFO L175 Difference]: Start difference. First operand has 298 places, 383 transitions, 4683 flow. Second operand 8 states and 197 transitions. [2024-06-14 14:09:12,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 400 transitions, 5505 flow [2024-06-14 14:09:13,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 400 transitions, 5338 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:13,435 INFO L231 Difference]: Finished difference. Result has 299 places, 383 transitions, 4637 flow [2024-06-14 14:09:13,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4516, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4637, PETRI_PLACES=299, PETRI_TRANSITIONS=383} [2024-06-14 14:09:13,435 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-14 14:09:13,435 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 383 transitions, 4637 flow [2024-06-14 14:09:13,435 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) [2024-06-14 14:09:13,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:13,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:13,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 14:09:13,436 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:13,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash 731003650, now seen corresponding path program 1 times [2024-06-14 14:09:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:13,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59711739] [2024-06-14 14:09:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:13,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:13,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59711739] [2024-06-14 14:09:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59711739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:13,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:13,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:13,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16357582] [2024-06-14 14:09:13,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:13,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:13,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:13,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:13,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 383 transitions, 4637 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:13,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:13,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:14,648 INFO L124 PetriNetUnfolderBase]: 2754/4827 cut-off events. [2024-06-14 14:09:14,648 INFO L125 PetriNetUnfolderBase]: For 448538/448538 co-relation queries the response was YES. [2024-06-14 14:09:14,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34206 conditions, 4827 events. 2754/4827 cut-off events. For 448538/448538 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32915 event pairs, 538 based on Foata normal form. 1/4824 useless extension candidates. Maximal degree in co-relation 34064. Up to 4215 conditions per place. [2024-06-14 14:09:14,701 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 379 selfloop transitions, 28 changer transitions 0/416 dead transitions. [2024-06-14 14:09:14,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 416 transitions, 5571 flow [2024-06-14 14:09:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 14:09:14,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:09:14,702 INFO L175 Difference]: Start difference. First operand has 299 places, 383 transitions, 4637 flow. Second operand 8 states and 208 transitions. [2024-06-14 14:09:14,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 416 transitions, 5571 flow [2024-06-14 14:09:16,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 416 transitions, 5401 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:09:16,335 INFO L231 Difference]: Finished difference. Result has 298 places, 386 transitions, 4579 flow [2024-06-14 14:09:16,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4579, PETRI_PLACES=298, PETRI_TRANSITIONS=386} [2024-06-14 14:09:16,336 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-14 14:09:16,336 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 386 transitions, 4579 flow [2024-06-14 14:09:16,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:16,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:16,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:16,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 14:09:16,336 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:16,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:16,337 INFO L85 PathProgramCache]: Analyzing trace with hash -851327264, now seen corresponding path program 2 times [2024-06-14 14:09:16,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:16,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474845045] [2024-06-14 14:09:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:16,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:16,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:16,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474845045] [2024-06-14 14:09:16,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474845045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:16,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:16,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609466189] [2024-06-14 14:09:16,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:16,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:16,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:16,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 386 transitions, 4579 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:16,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:16,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:16,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:17,352 INFO L124 PetriNetUnfolderBase]: 2767/4839 cut-off events. [2024-06-14 14:09:17,352 INFO L125 PetriNetUnfolderBase]: For 461607/461607 co-relation queries the response was YES. [2024-06-14 14:09:17,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34337 conditions, 4839 events. 2767/4839 cut-off events. For 461607/461607 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33067 event pairs, 554 based on Foata normal form. 1/4832 useless extension candidates. Maximal degree in co-relation 34195. Up to 4090 conditions per place. [2024-06-14 14:09:17,415 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 309 selfloop transitions, 88 changer transitions 0/406 dead transitions. [2024-06-14 14:09:17,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 406 transitions, 5695 flow [2024-06-14 14:09:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 14:09:17,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 14:09:17,416 INFO L175 Difference]: Start difference. First operand has 298 places, 386 transitions, 4579 flow. Second operand 6 states and 159 transitions. [2024-06-14 14:09:17,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 406 transitions, 5695 flow [2024-06-14 14:09:19,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 406 transitions, 5617 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:19,185 INFO L231 Difference]: Finished difference. Result has 298 places, 392 transitions, 4795 flow [2024-06-14 14:09:19,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4795, PETRI_PLACES=298, PETRI_TRANSITIONS=392} [2024-06-14 14:09:19,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-14 14:09:19,185 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 392 transitions, 4795 flow [2024-06-14 14:09:19,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:19,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:19,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:19,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 14:09:19,186 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:19,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:19,186 INFO L85 PathProgramCache]: Analyzing trace with hash -996673860, now seen corresponding path program 3 times [2024-06-14 14:09:19,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:19,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621025222] [2024-06-14 14:09:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:19,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:19,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:19,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621025222] [2024-06-14 14:09:19,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621025222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:19,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:19,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:19,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986703336] [2024-06-14 14:09:19,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:19,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:19,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:19,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:19,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:19,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:19,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 392 transitions, 4795 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:19,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:19,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:19,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:20,233 INFO L124 PetriNetUnfolderBase]: 2764/4836 cut-off events. [2024-06-14 14:09:20,233 INFO L125 PetriNetUnfolderBase]: For 467138/467138 co-relation queries the response was YES. [2024-06-14 14:09:20,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34473 conditions, 4836 events. 2764/4836 cut-off events. For 467138/467138 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33066 event pairs, 551 based on Foata normal form. 1/4832 useless extension candidates. Maximal degree in co-relation 34330. Up to 4087 conditions per place. [2024-06-14 14:09:20,291 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 302 selfloop transitions, 101 changer transitions 0/412 dead transitions. [2024-06-14 14:09:20,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 412 transitions, 5649 flow [2024-06-14 14:09:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-14 14:09:20,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-06-14 14:09:20,292 INFO L175 Difference]: Start difference. First operand has 298 places, 392 transitions, 4795 flow. Second operand 10 states and 248 transitions. [2024-06-14 14:09:20,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 412 transitions, 5649 flow [2024-06-14 14:09:22,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 412 transitions, 5553 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:22,422 INFO L231 Difference]: Finished difference. Result has 305 places, 392 transitions, 4912 flow [2024-06-14 14:09:22,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4912, PETRI_PLACES=305, PETRI_TRANSITIONS=392} [2024-06-14 14:09:22,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-14 14:09:22,423 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 392 transitions, 4912 flow [2024-06-14 14:09:22,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:22,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:22,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:22,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 14:09:22,423 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:22,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 735772194, now seen corresponding path program 1 times [2024-06-14 14:09:22,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:22,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418057515] [2024-06-14 14:09:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:22,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418057515] [2024-06-14 14:09:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418057515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:22,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:22,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389917960] [2024-06-14 14:09:22,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:22,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:22,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:22,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:22,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 392 transitions, 4912 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) [2024-06-14 14:09:22,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:22,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:22,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:23,416 INFO L124 PetriNetUnfolderBase]: 2777/4854 cut-off events. [2024-06-14 14:09:23,416 INFO L125 PetriNetUnfolderBase]: For 472580/472580 co-relation queries the response was YES. [2024-06-14 14:09:23,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34975 conditions, 4854 events. 2777/4854 cut-off events. For 472580/472580 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33179 event pairs, 560 based on Foata normal form. 1/4844 useless extension candidates. Maximal degree in co-relation 34831. Up to 4120 conditions per place. [2024-06-14 14:09:23,478 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 310 selfloop transitions, 93 changer transitions 0/412 dead transitions. [2024-06-14 14:09:23,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 412 transitions, 6038 flow [2024-06-14 14:09:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 14:09:23,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 14:09:23,479 INFO L175 Difference]: Start difference. First operand has 305 places, 392 transitions, 4912 flow. Second operand 6 states and 159 transitions. [2024-06-14 14:09:23,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 412 transitions, 6038 flow [2024-06-14 14:09:25,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 412 transitions, 5770 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 14:09:25,168 INFO L231 Difference]: Finished difference. Result has 301 places, 398 transitions, 4949 flow [2024-06-14 14:09:25,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4646, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4949, PETRI_PLACES=301, PETRI_TRANSITIONS=398} [2024-06-14 14:09:25,169 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-14 14:09:25,169 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 398 transitions, 4949 flow [2024-06-14 14:09:25,169 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) [2024-06-14 14:09:25,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:25,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:25,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 14:09:25,169 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:25,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:25,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1550779516, now seen corresponding path program 2 times [2024-06-14 14:09:25,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:25,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559041713] [2024-06-14 14:09:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:25,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:25,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:25,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559041713] [2024-06-14 14:09:25,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559041713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:25,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:25,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:25,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885627036] [2024-06-14 14:09:25,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:25,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:25,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:25,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:25,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 398 transitions, 4949 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) [2024-06-14 14:09:25,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:25,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:25,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:26,220 INFO L124 PetriNetUnfolderBase]: 2790/4878 cut-off events. [2024-06-14 14:09:26,220 INFO L125 PetriNetUnfolderBase]: For 478431/478431 co-relation queries the response was YES. [2024-06-14 14:09:26,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35466 conditions, 4878 events. 2790/4878 cut-off events. For 478431/478431 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33357 event pairs, 554 based on Foata normal form. 1/4874 useless extension candidates. Maximal degree in co-relation 35322. Up to 4135 conditions per place. [2024-06-14 14:09:26,281 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 306 selfloop transitions, 106 changer transitions 0/421 dead transitions. [2024-06-14 14:09:26,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 421 transitions, 6301 flow [2024-06-14 14:09:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 14:09:26,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 14:09:26,284 INFO L175 Difference]: Start difference. First operand has 301 places, 398 transitions, 4949 flow. Second operand 8 states and 207 transitions. [2024-06-14 14:09:26,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 421 transitions, 6301 flow [2024-06-14 14:09:28,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 421 transitions, 6204 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 14:09:28,477 INFO L231 Difference]: Finished difference. Result has 307 places, 404 transitions, 5183 flow [2024-06-14 14:09:28,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4868, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5183, PETRI_PLACES=307, PETRI_TRANSITIONS=404} [2024-06-14 14:09:28,478 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-14 14:09:28,478 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 404 transitions, 5183 flow [2024-06-14 14:09:28,478 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) [2024-06-14 14:09:28,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:28,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:28,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 14:09:28,479 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:28,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334878, now seen corresponding path program 3 times [2024-06-14 14:09:28,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:28,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568746903] [2024-06-14 14:09:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:28,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:28,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568746903] [2024-06-14 14:09:28,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568746903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:28,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:28,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711032908] [2024-06-14 14:09:28,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:28,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:28,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:28,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:28,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 404 transitions, 5183 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) [2024-06-14 14:09:28,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:28,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:28,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:29,606 INFO L124 PetriNetUnfolderBase]: 2787/4874 cut-off events. [2024-06-14 14:09:29,606 INFO L125 PetriNetUnfolderBase]: For 483495/483495 co-relation queries the response was YES. [2024-06-14 14:09:29,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35675 conditions, 4874 events. 2787/4874 cut-off events. For 483495/483495 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33369 event pairs, 554 based on Foata normal form. 1/4870 useless extension candidates. Maximal degree in co-relation 35529. Up to 4132 conditions per place. [2024-06-14 14:09:29,669 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 301 selfloop transitions, 111 changer transitions 0/421 dead transitions. [2024-06-14 14:09:29,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 421 transitions, 6239 flow [2024-06-14 14:09:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 14:09:29,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:09:29,671 INFO L175 Difference]: Start difference. First operand has 307 places, 404 transitions, 5183 flow. Second operand 9 states and 225 transitions. [2024-06-14 14:09:29,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 421 transitions, 6239 flow [2024-06-14 14:09:31,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 421 transitions, 5982 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:31,304 INFO L231 Difference]: Finished difference. Result has 310 places, 404 transitions, 5161 flow [2024-06-14 14:09:31,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4928, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5161, PETRI_PLACES=310, PETRI_TRANSITIONS=404} [2024-06-14 14:09:31,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-14 14:09:31,305 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 404 transitions, 5161 flow [2024-06-14 14:09:31,305 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) [2024-06-14 14:09:31,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:31,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:31,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 14:09:31,305 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:31,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1764464924, now seen corresponding path program 1 times [2024-06-14 14:09:31,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:31,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533248239] [2024-06-14 14:09:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:31,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:31,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:31,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533248239] [2024-06-14 14:09:31,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533248239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:31,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:31,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:31,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228439807] [2024-06-14 14:09:31,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:31,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:31,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:31,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:31,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:31,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:31,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 404 transitions, 5161 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) [2024-06-14 14:09:31,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:31,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:31,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:32,340 INFO L124 PetriNetUnfolderBase]: 2807/4912 cut-off events. [2024-06-14 14:09:32,340 INFO L125 PetriNetUnfolderBase]: For 507033/507033 co-relation queries the response was YES. [2024-06-14 14:09:32,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35855 conditions, 4912 events. 2807/4912 cut-off events. For 507033/507033 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 33614 event pairs, 475 based on Foata normal form. 6/4907 useless extension candidates. Maximal degree in co-relation 35709. Up to 4016 conditions per place. [2024-06-14 14:09:32,404 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 384 selfloop transitions, 35 changer transitions 0/428 dead transitions. [2024-06-14 14:09:32,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 428 transitions, 6321 flow [2024-06-14 14:09:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:09:32,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 14:09:32,405 INFO L175 Difference]: Start difference. First operand has 310 places, 404 transitions, 5161 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:09:32,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 428 transitions, 6321 flow [2024-06-14 14:09:34,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 428 transitions, 6071 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 14:09:34,343 INFO L231 Difference]: Finished difference. Result has 307 places, 405 transitions, 5007 flow [2024-06-14 14:09:34,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4913, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5007, PETRI_PLACES=307, PETRI_TRANSITIONS=405} [2024-06-14 14:09:34,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-14 14:09:34,343 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 405 transitions, 5007 flow [2024-06-14 14:09:34,343 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) [2024-06-14 14:09:34,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:34,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:34,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 14:09:34,344 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:34,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1553639452, now seen corresponding path program 2 times [2024-06-14 14:09:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:34,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008569220] [2024-06-14 14:09:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008569220] [2024-06-14 14:09:34,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008569220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:34,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:34,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:34,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926593453] [2024-06-14 14:09:34,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:34,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:34,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:34,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:34,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 405 transitions, 5007 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) [2024-06-14 14:09:34,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:34,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:34,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:35,393 INFO L124 PetriNetUnfolderBase]: 2827/4946 cut-off events. [2024-06-14 14:09:35,394 INFO L125 PetriNetUnfolderBase]: For 507243/507243 co-relation queries the response was YES. [2024-06-14 14:09:35,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35947 conditions, 4946 events. 2827/4946 cut-off events. For 507243/507243 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33936 event pairs, 546 based on Foata normal form. 6/4947 useless extension candidates. Maximal degree in co-relation 35801. Up to 4249 conditions per place. [2024-06-14 14:09:35,452 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 380 selfloop transitions, 34 changer transitions 0/423 dead transitions. [2024-06-14 14:09:35,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 423 transitions, 5925 flow [2024-06-14 14:09:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 14:09:35,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:09:35,453 INFO L175 Difference]: Start difference. First operand has 307 places, 405 transitions, 5007 flow. Second operand 6 states and 156 transitions. [2024-06-14 14:09:35,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 423 transitions, 5925 flow [2024-06-14 14:09:37,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 423 transitions, 5860 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:37,458 INFO L231 Difference]: Finished difference. Result has 310 places, 406 transitions, 5038 flow [2024-06-14 14:09:37,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4943, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5038, PETRI_PLACES=310, PETRI_TRANSITIONS=406} [2024-06-14 14:09:37,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-14 14:09:37,459 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 406 transitions, 5038 flow [2024-06-14 14:09:37,459 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) [2024-06-14 14:09:37,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:37,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:37,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 14:09:37,459 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:37,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:37,459 INFO L85 PathProgramCache]: Analyzing trace with hash 107985948, now seen corresponding path program 7 times [2024-06-14 14:09:37,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:37,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213948239] [2024-06-14 14:09:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:37,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:37,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:37,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213948239] [2024-06-14 14:09:37,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213948239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:37,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:37,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954442134] [2024-06-14 14:09:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:37,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:37,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:37,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:37,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 406 transitions, 5038 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) [2024-06-14 14:09:37,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:37,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:37,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:38,492 INFO L124 PetriNetUnfolderBase]: 2843/4961 cut-off events. [2024-06-14 14:09:38,492 INFO L125 PetriNetUnfolderBase]: For 509911/509911 co-relation queries the response was YES. [2024-06-14 14:09:38,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36236 conditions, 4961 events. 2843/4961 cut-off events. For 509911/509911 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 34080 event pairs, 547 based on Foata normal form. 4/4943 useless extension candidates. Maximal degree in co-relation 36089. Up to 4171 conditions per place. [2024-06-14 14:09:38,554 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 347 selfloop transitions, 80 changer transitions 0/436 dead transitions. [2024-06-14 14:09:38,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 436 transitions, 6417 flow [2024-06-14 14:09:38,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:09:38,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 14:09:38,555 INFO L175 Difference]: Start difference. First operand has 310 places, 406 transitions, 5038 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:09:38,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 436 transitions, 6417 flow [2024-06-14 14:09:40,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 436 transitions, 6335 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:40,320 INFO L231 Difference]: Finished difference. Result has 313 places, 413 transitions, 5405 flow [2024-06-14 14:09:40,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5405, PETRI_PLACES=313, PETRI_TRANSITIONS=413} [2024-06-14 14:09:40,320 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-14 14:09:40,320 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 413 transitions, 5405 flow [2024-06-14 14:09:40,320 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) [2024-06-14 14:09:40,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:40,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:40,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 14:09:40,320 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:40,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:40,321 INFO L85 PathProgramCache]: Analyzing trace with hash 117509148, now seen corresponding path program 8 times [2024-06-14 14:09:40,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:40,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215476354] [2024-06-14 14:09:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:40,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:40,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:40,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215476354] [2024-06-14 14:09:40,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215476354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:40,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:40,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:40,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170752688] [2024-06-14 14:09:40,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:40,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:40,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:40,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:40,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:40,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 413 transitions, 5405 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) [2024-06-14 14:09:40,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:40,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:40,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:41,397 INFO L124 PetriNetUnfolderBase]: 2859/4995 cut-off events. [2024-06-14 14:09:41,397 INFO L125 PetriNetUnfolderBase]: For 524288/524288 co-relation queries the response was YES. [2024-06-14 14:09:41,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36870 conditions, 4995 events. 2859/4995 cut-off events. For 524288/524288 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 34303 event pairs, 565 based on Foata normal form. 4/4991 useless extension candidates. Maximal degree in co-relation 36722. Up to 4277 conditions per place. [2024-06-14 14:09:41,464 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 356 selfloop transitions, 70 changer transitions 0/435 dead transitions. [2024-06-14 14:09:41,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 435 transitions, 6453 flow [2024-06-14 14:09:41,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:09:41,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:09:41,465 INFO L175 Difference]: Start difference. First operand has 313 places, 413 transitions, 5405 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:09:41,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 435 transitions, 6453 flow [2024-06-14 14:09:43,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 435 transitions, 6172 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:43,188 INFO L231 Difference]: Finished difference. Result has 317 places, 417 transitions, 5432 flow [2024-06-14 14:09:43,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5164, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5432, PETRI_PLACES=317, PETRI_TRANSITIONS=417} [2024-06-14 14:09:43,188 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-14 14:09:43,189 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 417 transitions, 5432 flow [2024-06-14 14:09:43,189 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) [2024-06-14 14:09:43,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:43,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:43,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 14:09:43,189 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:43,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash -367149376, now seen corresponding path program 9 times [2024-06-14 14:09:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:43,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431614084] [2024-06-14 14:09:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:43,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431614084] [2024-06-14 14:09:43,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431614084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:43,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:43,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:43,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578338741] [2024-06-14 14:09:43,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:43,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:43,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:43,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 417 transitions, 5432 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) [2024-06-14 14:09:43,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:43,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:43,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:44,233 INFO L124 PetriNetUnfolderBase]: 2862/5000 cut-off events. [2024-06-14 14:09:44,233 INFO L125 PetriNetUnfolderBase]: For 519668/519668 co-relation queries the response was YES. [2024-06-14 14:09:44,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36626 conditions, 5000 events. 2862/5000 cut-off events. For 519668/519668 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34345 event pairs, 564 based on Foata normal form. 4/4996 useless extension candidates. Maximal degree in co-relation 36476. Up to 4282 conditions per place. [2024-06-14 14:09:44,297 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 354 selfloop transitions, 71 changer transitions 0/434 dead transitions. [2024-06-14 14:09:44,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 434 transitions, 6384 flow [2024-06-14 14:09:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:09:44,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-14 14:09:44,298 INFO L175 Difference]: Start difference. First operand has 317 places, 417 transitions, 5432 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:09:44,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 434 transitions, 6384 flow [2024-06-14 14:09:46,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 434 transitions, 6164 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:46,370 INFO L231 Difference]: Finished difference. Result has 319 places, 419 transitions, 5432 flow [2024-06-14 14:09:46,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5432, PETRI_PLACES=319, PETRI_TRANSITIONS=419} [2024-06-14 14:09:46,371 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-14 14:09:46,371 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 419 transitions, 5432 flow [2024-06-14 14:09:46,371 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) [2024-06-14 14:09:46,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:46,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:46,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 14:09:46,371 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:46,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1279912866, now seen corresponding path program 10 times [2024-06-14 14:09:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:46,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103487716] [2024-06-14 14:09:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:46,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:46,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:46,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103487716] [2024-06-14 14:09:46,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103487716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:46,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:46,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:46,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084549125] [2024-06-14 14:09:46,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:46,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:46,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:46,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:46,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 419 transitions, 5432 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) [2024-06-14 14:09:46,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:46,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:46,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:47,436 INFO L124 PetriNetUnfolderBase]: 2857/4978 cut-off events. [2024-06-14 14:09:47,437 INFO L125 PetriNetUnfolderBase]: For 508787/508787 co-relation queries the response was YES. [2024-06-14 14:09:47,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36279 conditions, 4978 events. 2857/4978 cut-off events. For 508787/508787 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34153 event pairs, 591 based on Foata normal form. 2/4972 useless extension candidates. Maximal degree in co-relation 36128. Up to 4281 conditions per place. [2024-06-14 14:09:47,501 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 352 selfloop transitions, 70 changer transitions 0/431 dead transitions. [2024-06-14 14:09:47,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 431 transitions, 6304 flow [2024-06-14 14:09:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:09:47,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 14:09:47,503 INFO L175 Difference]: Start difference. First operand has 319 places, 419 transitions, 5432 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:09:47,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 431 transitions, 6304 flow [2024-06-14 14:09:49,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 431 transitions, 6036 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:49,591 INFO L231 Difference]: Finished difference. Result has 321 places, 419 transitions, 5309 flow [2024-06-14 14:09:49,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5164, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5309, PETRI_PLACES=321, PETRI_TRANSITIONS=419} [2024-06-14 14:09:49,592 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-14 14:09:49,592 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 419 transitions, 5309 flow [2024-06-14 14:09:49,592 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) [2024-06-14 14:09:49,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:49,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:49,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 14:09:49,592 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:49,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1983587836, now seen corresponding path program 4 times [2024-06-14 14:09:49,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:49,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497131869] [2024-06-14 14:09:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:49,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:49,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:49,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497131869] [2024-06-14 14:09:49,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497131869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:49,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:49,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:49,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111026727] [2024-06-14 14:09:49,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:49,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:49,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:49,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:49,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:49,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 419 transitions, 5309 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:49,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:49,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:49,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:50,744 INFO L124 PetriNetUnfolderBase]: 2862/5003 cut-off events. [2024-06-14 14:09:50,744 INFO L125 PetriNetUnfolderBase]: For 509960/509960 co-relation queries the response was YES. [2024-06-14 14:09:50,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36190 conditions, 5003 events. 2862/5003 cut-off events. For 509960/509960 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34369 event pairs, 563 based on Foata normal form. 1/4993 useless extension candidates. Maximal degree in co-relation 36038. Up to 4243 conditions per place. [2024-06-14 14:09:50,809 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 361 selfloop transitions, 87 changer transitions 0/457 dead transitions. [2024-06-14 14:09:50,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 457 transitions, 6349 flow [2024-06-14 14:09:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-14 14:09:50,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2024-06-14 14:09:50,810 INFO L175 Difference]: Start difference. First operand has 321 places, 419 transitions, 5309 flow. Second operand 10 states and 258 transitions. [2024-06-14 14:09:50,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 457 transitions, 6349 flow [2024-06-14 14:09:52,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 457 transitions, 6162 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:52,775 INFO L231 Difference]: Finished difference. Result has 325 places, 422 transitions, 5364 flow [2024-06-14 14:09:52,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5122, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5364, PETRI_PLACES=325, PETRI_TRANSITIONS=422} [2024-06-14 14:09:52,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-14 14:09:52,776 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 422 transitions, 5364 flow [2024-06-14 14:09:52,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:52,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:52,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:52,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 14:09:52,776 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:52,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2029719648, now seen corresponding path program 5 times [2024-06-14 14:09:52,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:52,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312751944] [2024-06-14 14:09:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:53,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:53,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312751944] [2024-06-14 14:09:53,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312751944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:53,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:53,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:53,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575769623] [2024-06-14 14:09:53,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:53,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:53,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:53,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:53,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 422 transitions, 5364 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:53,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:53,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:53,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:53,918 INFO L124 PetriNetUnfolderBase]: 2883/5037 cut-off events. [2024-06-14 14:09:53,918 INFO L125 PetriNetUnfolderBase]: For 530686/530686 co-relation queries the response was YES. [2024-06-14 14:09:53,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36816 conditions, 5037 events. 2883/5037 cut-off events. For 530686/530686 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34686 event pairs, 555 based on Foata normal form. 1/5030 useless extension candidates. Maximal degree in co-relation 36663. Up to 4115 conditions per place. [2024-06-14 14:09:53,987 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 300 selfloop transitions, 150 changer transitions 0/459 dead transitions. [2024-06-14 14:09:53,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 459 transitions, 6913 flow [2024-06-14 14:09:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-14 14:09:53,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-06-14 14:09:53,988 INFO L175 Difference]: Start difference. First operand has 325 places, 422 transitions, 5364 flow. Second operand 10 states and 248 transitions. [2024-06-14 14:09:53,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 459 transitions, 6913 flow [2024-06-14 14:09:56,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 459 transitions, 6705 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 14:09:56,202 INFO L231 Difference]: Finished difference. Result has 327 places, 431 transitions, 5636 flow [2024-06-14 14:09:56,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5636, PETRI_PLACES=327, PETRI_TRANSITIONS=431} [2024-06-14 14:09:56,202 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-14 14:09:56,202 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 431 transitions, 5636 flow [2024-06-14 14:09:56,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:56,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:56,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:56,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 14:09:56,202 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:56,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash -652836320, now seen corresponding path program 6 times [2024-06-14 14:09:56,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:56,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230775505] [2024-06-14 14:09:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:56,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:56,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:56,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230775505] [2024-06-14 14:09:56,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230775505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:56,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:56,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:56,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860297348] [2024-06-14 14:09:56,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:56,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:56,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:56,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:56,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:56,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 431 transitions, 5636 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:56,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:56,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:56,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:57,402 INFO L124 PetriNetUnfolderBase]: 2896/5060 cut-off events. [2024-06-14 14:09:57,402 INFO L125 PetriNetUnfolderBase]: For 545891/545891 co-relation queries the response was YES. [2024-06-14 14:09:57,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37403 conditions, 5060 events. 2896/5060 cut-off events. For 545891/545891 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34831 event pairs, 563 based on Foata normal form. 1/5050 useless extension candidates. Maximal degree in co-relation 37249. Up to 4237 conditions per place. [2024-06-14 14:09:57,469 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 353 selfloop transitions, 109 changer transitions 0/471 dead transitions. [2024-06-14 14:09:57,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 471 transitions, 6986 flow [2024-06-14 14:09:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:09:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:09:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-06-14 14:09:57,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723140495867769 [2024-06-14 14:09:57,470 INFO L175 Difference]: Start difference. First operand has 327 places, 431 transitions, 5636 flow. Second operand 11 states and 277 transitions. [2024-06-14 14:09:57,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 471 transitions, 6986 flow [2024-06-14 14:09:59,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 471 transitions, 6584 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:59,793 INFO L231 Difference]: Finished difference. Result has 332 places, 437 transitions, 5610 flow [2024-06-14 14:09:59,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5610, PETRI_PLACES=332, PETRI_TRANSITIONS=437} [2024-06-14 14:09:59,794 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-14 14:09:59,794 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 437 transitions, 5610 flow [2024-06-14 14:09:59,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:59,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:59,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:59,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 14:09:59,794 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:59,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:59,795 INFO L85 PathProgramCache]: Analyzing trace with hash 662352446, now seen corresponding path program 7 times [2024-06-14 14:09:59,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:59,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358709384] [2024-06-14 14:09:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:59,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:00,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:00,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358709384] [2024-06-14 14:10:00,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358709384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:00,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:00,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:00,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196308871] [2024-06-14 14:10:00,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:00,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:00,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:00,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:00,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 437 transitions, 5610 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:00,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:00,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:00,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:00,953 INFO L124 PetriNetUnfolderBase]: 2893/5056 cut-off events. [2024-06-14 14:10:00,953 INFO L125 PetriNetUnfolderBase]: For 549635/549635 co-relation queries the response was YES. [2024-06-14 14:10:01,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36976 conditions, 5056 events. 2893/5056 cut-off events. For 549635/549635 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34803 event pairs, 561 based on Foata normal form. 1/5046 useless extension candidates. Maximal degree in co-relation 36821. Up to 4127 conditions per place. [2024-06-14 14:10:01,021 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 306 selfloop transitions, 156 changer transitions 0/471 dead transitions. [2024-06-14 14:10:01,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 471 transitions, 7034 flow [2024-06-14 14:10:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-14 14:10:01,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:10:01,022 INFO L175 Difference]: Start difference. First operand has 332 places, 437 transitions, 5610 flow. Second operand 10 states and 260 transitions. [2024-06-14 14:10:01,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 471 transitions, 7034 flow [2024-06-14 14:10:03,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 471 transitions, 6756 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:03,612 INFO L231 Difference]: Finished difference. Result has 334 places, 437 transitions, 5650 flow [2024-06-14 14:10:03,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5650, PETRI_PLACES=334, PETRI_TRANSITIONS=437} [2024-06-14 14:10:03,612 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-14 14:10:03,612 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 437 transitions, 5650 flow [2024-06-14 14:10:03,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:03,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:03,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:03,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 14:10:03,613 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:03,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:03,613 INFO L85 PathProgramCache]: Analyzing trace with hash -215980124, now seen corresponding path program 8 times [2024-06-14 14:10:03,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:03,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679418026] [2024-06-14 14:10:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:03,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:03,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:03,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679418026] [2024-06-14 14:10:03,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679418026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:03,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:03,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:03,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585941037] [2024-06-14 14:10:03,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:03,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:03,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:03,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:03,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:03,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 437 transitions, 5650 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:03,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:03,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:03,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:04,809 INFO L124 PetriNetUnfolderBase]: 2906/5077 cut-off events. [2024-06-14 14:10:04,809 INFO L125 PetriNetUnfolderBase]: For 566502/566502 co-relation queries the response was YES. [2024-06-14 14:10:04,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37455 conditions, 5077 events. 2906/5077 cut-off events. For 566502/566502 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 35028 event pairs, 555 based on Foata normal form. 1/5070 useless extension candidates. Maximal degree in co-relation 37299. Up to 4142 conditions per place. [2024-06-14 14:10:04,867 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 293 selfloop transitions, 164 changer transitions 0/466 dead transitions. [2024-06-14 14:10:04,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 466 transitions, 7382 flow [2024-06-14 14:10:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:10:04,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 14:10:04,869 INFO L175 Difference]: Start difference. First operand has 334 places, 437 transitions, 5650 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:10:04,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 466 transitions, 7382 flow [2024-06-14 14:10:07,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 466 transitions, 7018 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 14:10:07,418 INFO L231 Difference]: Finished difference. Result has 334 places, 443 transitions, 5755 flow [2024-06-14 14:10:07,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5310, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5755, PETRI_PLACES=334, PETRI_TRANSITIONS=443} [2024-06-14 14:10:07,418 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-14 14:10:07,418 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 443 transitions, 5755 flow [2024-06-14 14:10:07,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:07,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:07,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:07,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 14:10:07,419 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:07,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1944206434, now seen corresponding path program 9 times [2024-06-14 14:10:07,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:07,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489347207] [2024-06-14 14:10:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:07,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:07,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:07,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489347207] [2024-06-14 14:10:07,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489347207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:07,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:07,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:07,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425319376] [2024-06-14 14:10:07,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:07,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:07,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:07,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:07,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:07,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 443 transitions, 5755 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:07,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:07,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:07,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:08,598 INFO L124 PetriNetUnfolderBase]: 2911/5086 cut-off events. [2024-06-14 14:10:08,598 INFO L125 PetriNetUnfolderBase]: For 576458/576458 co-relation queries the response was YES. [2024-06-14 14:10:08,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37590 conditions, 5086 events. 2911/5086 cut-off events. For 576458/576458 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 35122 event pairs, 555 based on Foata normal form. 1/5079 useless extension candidates. Maximal degree in co-relation 37434. Up to 4148 conditions per place. [2024-06-14 14:10:08,668 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 296 selfloop transitions, 162 changer transitions 0/467 dead transitions. [2024-06-14 14:10:08,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 467 transitions, 7206 flow [2024-06-14 14:10:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 14:10:08,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707070707070707 [2024-06-14 14:10:08,669 INFO L175 Difference]: Start difference. First operand has 334 places, 443 transitions, 5755 flow. Second operand 9 states and 226 transitions. [2024-06-14 14:10:08,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 467 transitions, 7206 flow [2024-06-14 14:10:10,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 467 transitions, 6916 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:10,826 INFO L231 Difference]: Finished difference. Result has 337 places, 446 transitions, 5856 flow [2024-06-14 14:10:10,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5468, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5856, PETRI_PLACES=337, PETRI_TRANSITIONS=446} [2024-06-14 14:10:10,826 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-14 14:10:10,826 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 446 transitions, 5856 flow [2024-06-14 14:10:10,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:10,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:10,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:10,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 14:10:10,827 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:10,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1286584066, now seen corresponding path program 10 times [2024-06-14 14:10:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561145916] [2024-06-14 14:10:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:11,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:11,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561145916] [2024-06-14 14:10:11,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561145916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:11,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:11,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:11,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803938841] [2024-06-14 14:10:11,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:11,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:11,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:11,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:11,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:11,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 446 transitions, 5856 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:11,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:11,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:11,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:11,973 INFO L124 PetriNetUnfolderBase]: 2916/5080 cut-off events. [2024-06-14 14:10:11,973 INFO L125 PetriNetUnfolderBase]: For 587246/587246 co-relation queries the response was YES. [2024-06-14 14:10:12,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37761 conditions, 5080 events. 2916/5080 cut-off events. For 587246/587246 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35061 event pairs, 589 based on Foata normal form. 1/5073 useless extension candidates. Maximal degree in co-relation 37604. Up to 4154 conditions per place. [2024-06-14 14:10:12,041 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 291 selfloop transitions, 168 changer transitions 0/468 dead transitions. [2024-06-14 14:10:12,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 468 transitions, 7518 flow [2024-06-14 14:10:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 14:10:12,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:10:12,043 INFO L175 Difference]: Start difference. First operand has 337 places, 446 transitions, 5856 flow. Second operand 9 states and 225 transitions. [2024-06-14 14:10:12,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 468 transitions, 7518 flow [2024-06-14 14:10:14,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 468 transitions, 7199 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:14,787 INFO L231 Difference]: Finished difference. Result has 340 places, 449 transitions, 5937 flow [2024-06-14 14:10:14,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5543, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5937, PETRI_PLACES=340, PETRI_TRANSITIONS=449} [2024-06-14 14:10:14,788 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-14 14:10:14,788 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 449 transitions, 5937 flow [2024-06-14 14:10:14,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:14,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:14,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:14,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 14:10:14,788 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:14,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:14,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1903084362, now seen corresponding path program 11 times [2024-06-14 14:10:14,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:14,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729215551] [2024-06-14 14:10:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:15,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:15,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729215551] [2024-06-14 14:10:15,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729215551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:15,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:15,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:15,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618098337] [2024-06-14 14:10:15,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:15,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:15,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:15,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:15,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 449 transitions, 5937 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:15,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:15,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:15,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:15,918 INFO L124 PetriNetUnfolderBase]: 2913/5076 cut-off events. [2024-06-14 14:10:15,918 INFO L125 PetriNetUnfolderBase]: For 591701/591701 co-relation queries the response was YES. [2024-06-14 14:10:15,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37703 conditions, 5076 events. 2913/5076 cut-off events. For 591701/591701 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35001 event pairs, 589 based on Foata normal form. 1/5069 useless extension candidates. Maximal degree in co-relation 37545. Up to 4151 conditions per place. [2024-06-14 14:10:15,987 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 291 selfloop transitions, 169 changer transitions 0/469 dead transitions. [2024-06-14 14:10:15,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 469 transitions, 7335 flow [2024-06-14 14:10:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:10:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:10:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-14 14:10:15,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:10:15,988 INFO L175 Difference]: Start difference. First operand has 340 places, 449 transitions, 5937 flow. Second operand 11 states and 264 transitions. [2024-06-14 14:10:15,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 469 transitions, 7335 flow [2024-06-14 14:10:18,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 469 transitions, 6894 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:18,706 INFO L231 Difference]: Finished difference. Result has 344 places, 449 transitions, 5840 flow [2024-06-14 14:10:18,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5496, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5840, PETRI_PLACES=344, PETRI_TRANSITIONS=449} [2024-06-14 14:10:18,706 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-14 14:10:18,706 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 449 transitions, 5840 flow [2024-06-14 14:10:18,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:18,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:18,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:18,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 14:10:18,707 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:18,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:18,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1988356380, now seen corresponding path program 4 times [2024-06-14 14:10:18,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:18,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623816856] [2024-06-14 14:10:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:18,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:18,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623816856] [2024-06-14 14:10:18,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623816856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:18,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:18,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:18,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049931217] [2024-06-14 14:10:18,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:18,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:18,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:18,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:18,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 449 transitions, 5840 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) [2024-06-14 14:10:18,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:18,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:18,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:19,748 INFO L124 PetriNetUnfolderBase]: 2918/5097 cut-off events. [2024-06-14 14:10:19,749 INFO L125 PetriNetUnfolderBase]: For 600467/600467 co-relation queries the response was YES. [2024-06-14 14:10:19,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37783 conditions, 5097 events. 2918/5097 cut-off events. For 600467/600467 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35162 event pairs, 570 based on Foata normal form. 1/5087 useless extension candidates. Maximal degree in co-relation 37624. Up to 4242 conditions per place. [2024-06-14 14:10:19,816 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 349 selfloop transitions, 116 changer transitions 0/474 dead transitions. [2024-06-14 14:10:19,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 474 transitions, 7364 flow [2024-06-14 14:10:19,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:10:19,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 14:10:19,817 INFO L175 Difference]: Start difference. First operand has 344 places, 449 transitions, 5840 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:10:19,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 474 transitions, 7364 flow [2024-06-14 14:10:22,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 474 transitions, 6957 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 14:10:22,530 INFO L231 Difference]: Finished difference. Result has 340 places, 455 transitions, 5790 flow [2024-06-14 14:10:22,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5790, PETRI_PLACES=340, PETRI_TRANSITIONS=455} [2024-06-14 14:10:22,530 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-14 14:10:22,530 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 455 transitions, 5790 flow [2024-06-14 14:10:22,530 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) [2024-06-14 14:10:22,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:22,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:22,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 14:10:22,531 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:22,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash -367137472, now seen corresponding path program 5 times [2024-06-14 14:10:22,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:22,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906670567] [2024-06-14 14:10:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:22,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:22,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:22,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906670567] [2024-06-14 14:10:22,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906670567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:22,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:22,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:22,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296052426] [2024-06-14 14:10:22,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:22,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:22,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:22,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:22,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:22,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:22,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 455 transitions, 5790 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) [2024-06-14 14:10:22,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:22,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:22,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:23,622 INFO L124 PetriNetUnfolderBase]: 2931/5119 cut-off events. [2024-06-14 14:10:23,622 INFO L125 PetriNetUnfolderBase]: For 618412/618412 co-relation queries the response was YES. [2024-06-14 14:10:23,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38248 conditions, 5119 events. 2931/5119 cut-off events. For 618412/618412 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 35361 event pairs, 570 based on Foata normal form. 1/5109 useless extension candidates. Maximal degree in co-relation 38088. Up to 4257 conditions per place. [2024-06-14 14:10:23,695 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 114 changer transitions 0/477 dead transitions. [2024-06-14 14:10:23,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 477 transitions, 7328 flow [2024-06-14 14:10:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:10:23,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 14:10:23,696 INFO L175 Difference]: Start difference. First operand has 340 places, 455 transitions, 5790 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:10:23,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 477 transitions, 7328 flow [2024-06-14 14:10:26,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 477 transitions, 7012 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 14:10:26,738 INFO L231 Difference]: Finished difference. Result has 343 places, 461 transitions, 5833 flow [2024-06-14 14:10:26,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5522, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5833, PETRI_PLACES=343, PETRI_TRANSITIONS=461} [2024-06-14 14:10:26,738 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-14 14:10:26,738 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 461 transitions, 5833 flow [2024-06-14 14:10:26,738 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) [2024-06-14 14:10:26,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:26,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:26,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 14:10:26,739 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:26,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash -353804992, now seen corresponding path program 6 times [2024-06-14 14:10:26,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:26,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005951283] [2024-06-14 14:10:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:26,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:26,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:26,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005951283] [2024-06-14 14:10:26,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005951283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:26,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:26,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:26,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087724067] [2024-06-14 14:10:26,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:26,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:26,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:26,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:26,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 461 transitions, 5833 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) [2024-06-14 14:10:26,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:26,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:26,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:27,788 INFO L124 PetriNetUnfolderBase]: 2928/5115 cut-off events. [2024-06-14 14:10:27,789 INFO L125 PetriNetUnfolderBase]: For 620108/620108 co-relation queries the response was YES. [2024-06-14 14:10:27,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37819 conditions, 5115 events. 2928/5115 cut-off events. For 620108/620108 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 35324 event pairs, 570 based on Foata normal form. 1/5105 useless extension candidates. Maximal degree in co-relation 37658. Up to 4254 conditions per place. [2024-06-14 14:10:27,857 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 117 changer transitions 0/476 dead transitions. [2024-06-14 14:10:27,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 476 transitions, 7025 flow [2024-06-14 14:10:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:10:27,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 14:10:27,858 INFO L175 Difference]: Start difference. First operand has 343 places, 461 transitions, 5833 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:10:27,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 476 transitions, 7025 flow [2024-06-14 14:10:30,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 476 transitions, 6839 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 14:10:30,667 INFO L231 Difference]: Finished difference. Result has 347 places, 461 transitions, 5888 flow [2024-06-14 14:10:30,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5647, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5888, PETRI_PLACES=347, PETRI_TRANSITIONS=461} [2024-06-14 14:10:30,668 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-14 14:10:30,668 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 461 transitions, 5888 flow [2024-06-14 14:10:30,668 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) [2024-06-14 14:10:30,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:30,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:30,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 14:10:30,668 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:30,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1219521146, now seen corresponding path program 7 times [2024-06-14 14:10:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:30,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500959625] [2024-06-14 14:10:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:30,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:30,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:30,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500959625] [2024-06-14 14:10:30,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500959625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:30,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:30,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:30,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627834928] [2024-06-14 14:10:30,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:30,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:30,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:30,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:30,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 461 transitions, 5888 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) [2024-06-14 14:10:30,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:30,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:30,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:31,816 INFO L124 PetriNetUnfolderBase]: 2949/5133 cut-off events. [2024-06-14 14:10:31,816 INFO L125 PetriNetUnfolderBase]: For 645520/645520 co-relation queries the response was YES. [2024-06-14 14:10:31,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38363 conditions, 5133 events. 2949/5133 cut-off events. For 645520/645520 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 35470 event pairs, 605 based on Foata normal form. 1/5126 useless extension candidates. Maximal degree in co-relation 38201. Up to 4278 conditions per place. [2024-06-14 14:10:31,880 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 353 selfloop transitions, 122 changer transitions 0/484 dead transitions. [2024-06-14 14:10:31,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 484 transitions, 7683 flow [2024-06-14 14:10:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:10:31,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 14:10:31,881 INFO L175 Difference]: Start difference. First operand has 347 places, 461 transitions, 5888 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:10:31,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 484 transitions, 7683 flow [2024-06-14 14:10:34,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 484 transitions, 7415 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:34,932 INFO L231 Difference]: Finished difference. Result has 348 places, 470 transitions, 6011 flow [2024-06-14 14:10:34,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6011, PETRI_PLACES=348, PETRI_TRANSITIONS=470} [2024-06-14 14:10:34,933 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 303 predicate places. [2024-06-14 14:10:34,933 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 470 transitions, 6011 flow [2024-06-14 14:10:34,933 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) [2024-06-14 14:10:34,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:34,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:34,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 14:10:34,933 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:34,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:34,933 INFO L85 PathProgramCache]: Analyzing trace with hash 731826628, now seen corresponding path program 8 times [2024-06-14 14:10:34,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:34,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023633135] [2024-06-14 14:10:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:34,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:35,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:35,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023633135] [2024-06-14 14:10:35,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023633135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:35,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:35,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:35,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768529748] [2024-06-14 14:10:35,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:35,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:35,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:35,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:35,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:35,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:35,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 470 transitions, 6011 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) [2024-06-14 14:10:35,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:35,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:35,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:36,002 INFO L124 PetriNetUnfolderBase]: 2946/5129 cut-off events. [2024-06-14 14:10:36,002 INFO L125 PetriNetUnfolderBase]: For 649707/649707 co-relation queries the response was YES. [2024-06-14 14:10:36,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38294 conditions, 5129 events. 2946/5129 cut-off events. For 649707/649707 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 35421 event pairs, 605 based on Foata normal form. 1/5122 useless extension candidates. Maximal degree in co-relation 38131. Up to 4275 conditions per place. [2024-06-14 14:10:36,073 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 352 selfloop transitions, 122 changer transitions 0/483 dead transitions. [2024-06-14 14:10:36,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 483 transitions, 7441 flow [2024-06-14 14:10:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:10:36,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 14:10:36,074 INFO L175 Difference]: Start difference. First operand has 348 places, 470 transitions, 6011 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:10:36,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 483 transitions, 7441 flow [2024-06-14 14:10:39,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 483 transitions, 7242 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-14 14:10:39,384 INFO L231 Difference]: Finished difference. Result has 353 places, 470 transitions, 6062 flow [2024-06-14 14:10:39,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5812, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6062, PETRI_PLACES=353, PETRI_TRANSITIONS=470} [2024-06-14 14:10:39,384 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-14 14:10:39,385 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 470 transitions, 6062 flow [2024-06-14 14:10:39,385 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) [2024-06-14 14:10:39,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:39,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:39,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 14:10:39,385 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:39,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:39,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1017371968, now seen corresponding path program 9 times [2024-06-14 14:10:39,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:39,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993415847] [2024-06-14 14:10:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:39,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:39,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:39,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993415847] [2024-06-14 14:10:39,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993415847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:39,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:39,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:39,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098330508] [2024-06-14 14:10:39,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:39,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:39,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:39,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:39,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:39,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:39,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 470 transitions, 6062 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) [2024-06-14 14:10:39,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:39,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:39,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:40,496 INFO L124 PetriNetUnfolderBase]: 2943/5125 cut-off events. [2024-06-14 14:10:40,496 INFO L125 PetriNetUnfolderBase]: For 655023/655023 co-relation queries the response was YES. [2024-06-14 14:10:40,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 5125 events. 2943/5125 cut-off events. For 655023/655023 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 35458 event pairs, 605 based on Foata normal form. 1/5118 useless extension candidates. Maximal degree in co-relation 38074. Up to 4272 conditions per place. [2024-06-14 14:10:40,568 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 344 selfloop transitions, 129 changer transitions 0/482 dead transitions. [2024-06-14 14:10:40,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 482 transitions, 7264 flow [2024-06-14 14:10:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:10:40,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-14 14:10:40,569 INFO L175 Difference]: Start difference. First operand has 353 places, 470 transitions, 6062 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:10:40,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 482 transitions, 7264 flow [2024-06-14 14:10:44,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 482 transitions, 7005 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:44,186 INFO L231 Difference]: Finished difference. Result has 355 places, 470 transitions, 6067 flow [2024-06-14 14:10:44,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6067, PETRI_PLACES=355, PETRI_TRANSITIONS=470} [2024-06-14 14:10:44,186 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-14 14:10:44,186 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 470 transitions, 6067 flow [2024-06-14 14:10:44,186 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) [2024-06-14 14:10:44,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:44,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:44,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 14:10:44,187 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:44,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:44,187 INFO L85 PathProgramCache]: Analyzing trace with hash 641991150, now seen corresponding path program 1 times [2024-06-14 14:10:44,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:44,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184846630] [2024-06-14 14:10:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:44,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:44,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:44,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184846630] [2024-06-14 14:10:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184846630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:44,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:44,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:44,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028101910] [2024-06-14 14:10:44,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:44,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:44,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 470 transitions, 6067 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:44,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:44,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:44,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:45,446 INFO L124 PetriNetUnfolderBase]: 2964/5176 cut-off events. [2024-06-14 14:10:45,446 INFO L125 PetriNetUnfolderBase]: For 690795/690795 co-relation queries the response was YES. [2024-06-14 14:10:45,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39083 conditions, 5176 events. 2964/5176 cut-off events. For 690795/690795 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35837 event pairs, 545 based on Foata normal form. 2/5169 useless extension candidates. Maximal degree in co-relation 38917. Up to 4465 conditions per place. [2024-06-14 14:10:45,521 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 449 selfloop transitions, 47 changer transitions 0/505 dead transitions. [2024-06-14 14:10:45,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 505 transitions, 7545 flow [2024-06-14 14:10:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-14 14:10:45,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732323232323232 [2024-06-14 14:10:45,522 INFO L175 Difference]: Start difference. First operand has 355 places, 470 transitions, 6067 flow. Second operand 9 states and 227 transitions. [2024-06-14 14:10:45,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 505 transitions, 7545 flow [2024-06-14 14:10:49,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 505 transitions, 7249 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:49,322 INFO L231 Difference]: Finished difference. Result has 357 places, 474 transitions, 6054 flow [2024-06-14 14:10:49,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6054, PETRI_PLACES=357, PETRI_TRANSITIONS=474} [2024-06-14 14:10:49,322 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-14 14:10:49,322 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 474 transitions, 6054 flow [2024-06-14 14:10:49,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:49,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:49,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:49,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 14:10:49,322 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:49,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash 960969640, now seen corresponding path program 2 times [2024-06-14 14:10:49,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:49,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562951153] [2024-06-14 14:10:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:49,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:49,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562951153] [2024-06-14 14:10:49,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562951153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:49,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:49,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:49,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728691065] [2024-06-14 14:10:49,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:49,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:49,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:49,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:49,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 474 transitions, 6054 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:49,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:49,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:49,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:50,598 INFO L124 PetriNetUnfolderBase]: 2959/5178 cut-off events. [2024-06-14 14:10:50,598 INFO L125 PetriNetUnfolderBase]: For 686839/686839 co-relation queries the response was YES. [2024-06-14 14:10:50,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38762 conditions, 5178 events. 2959/5178 cut-off events. For 686839/686839 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35913 event pairs, 555 based on Foata normal form. 2/5173 useless extension candidates. Maximal degree in co-relation 38595. Up to 4429 conditions per place. [2024-06-14 14:10:50,672 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 425 selfloop transitions, 73 changer transitions 0/507 dead transitions. [2024-06-14 14:10:50,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 507 transitions, 7132 flow [2024-06-14 14:10:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-14 14:10:50,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-14 14:10:50,673 INFO L175 Difference]: Start difference. First operand has 357 places, 474 transitions, 6054 flow. Second operand 10 states and 251 transitions. [2024-06-14 14:10:50,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 507 transitions, 7132 flow [2024-06-14 14:10:54,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 507 transitions, 6913 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:54,622 INFO L231 Difference]: Finished difference. Result has 362 places, 474 transitions, 5986 flow [2024-06-14 14:10:54,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5835, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5986, PETRI_PLACES=362, PETRI_TRANSITIONS=474} [2024-06-14 14:10:54,623 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-14 14:10:54,623 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 474 transitions, 5986 flow [2024-06-14 14:10:54,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:54,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:54,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 14:10:54,623 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:54,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:54,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2140899068, now seen corresponding path program 1 times [2024-06-14 14:10:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:54,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367210907] [2024-06-14 14:10:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:54,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:54,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:54,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367210907] [2024-06-14 14:10:54,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367210907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:54,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:54,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844938511] [2024-06-14 14:10:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:54,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:54,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:54,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:54,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:54,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 474 transitions, 5986 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:54,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:54,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:54,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:55,888 INFO L124 PetriNetUnfolderBase]: 2972/5195 cut-off events. [2024-06-14 14:10:55,888 INFO L125 PetriNetUnfolderBase]: For 698092/698092 co-relation queries the response was YES. [2024-06-14 14:10:55,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38980 conditions, 5195 events. 2972/5195 cut-off events. For 698092/698092 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36024 event pairs, 563 based on Foata normal form. 1/5184 useless extension candidates. Maximal degree in co-relation 38811. Up to 4307 conditions per place. [2024-06-14 14:10:55,960 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 365 selfloop transitions, 141 changer transitions 0/515 dead transitions. [2024-06-14 14:10:55,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 515 transitions, 7863 flow [2024-06-14 14:10:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-14 14:10:55,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:10:55,961 INFO L175 Difference]: Start difference. First operand has 362 places, 474 transitions, 5986 flow. Second operand 10 states and 260 transitions. [2024-06-14 14:10:55,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 515 transitions, 7863 flow [2024-06-14 14:11:00,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 515 transitions, 7705 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:00,113 INFO L231 Difference]: Finished difference. Result has 363 places, 480 transitions, 6193 flow [2024-06-14 14:11:00,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5828, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6193, PETRI_PLACES=363, PETRI_TRANSITIONS=480} [2024-06-14 14:11:00,113 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-14 14:11:00,113 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 480 transitions, 6193 flow [2024-06-14 14:11:00,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:00,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:00,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:00,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 14:11:00,114 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:00,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:00,114 INFO L85 PathProgramCache]: Analyzing trace with hash -142544030, now seen corresponding path program 10 times [2024-06-14 14:11:00,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:00,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938939541] [2024-06-14 14:11:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:00,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:00,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:00,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938939541] [2024-06-14 14:11:00,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938939541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:00,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:00,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:11:00,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347930472] [2024-06-14 14:11:00,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:00,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:11:00,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:00,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:11:00,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:11:00,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:00,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 480 transitions, 6193 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) [2024-06-14 14:11:00,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:00,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:00,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:01,259 INFO L124 PetriNetUnfolderBase]: 2977/5211 cut-off events. [2024-06-14 14:11:01,260 INFO L125 PetriNetUnfolderBase]: For 709440/709440 co-relation queries the response was YES. [2024-06-14 14:11:01,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39299 conditions, 5211 events. 2977/5211 cut-off events. For 709440/709440 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36132 event pairs, 549 based on Foata normal form. 1/5205 useless extension candidates. Maximal degree in co-relation 39129. Up to 4521 conditions per place. [2024-06-14 14:11:01,336 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 460 selfloop transitions, 41 changer transitions 0/510 dead transitions. [2024-06-14 14:11:01,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 510 transitions, 7551 flow [2024-06-14 14:11:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 14:11:01,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-14 14:11:01,336 INFO L175 Difference]: Start difference. First operand has 363 places, 480 transitions, 6193 flow. Second operand 7 states and 189 transitions. [2024-06-14 14:11:01,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 510 transitions, 7551 flow [2024-06-14 14:11:05,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 510 transitions, 7295 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:11:05,092 INFO L231 Difference]: Finished difference. Result has 364 places, 483 transitions, 6077 flow [2024-06-14 14:11:05,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6077, PETRI_PLACES=364, PETRI_TRANSITIONS=483} [2024-06-14 14:11:05,093 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-14 14:11:05,093 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 483 transitions, 6077 flow [2024-06-14 14:11:05,093 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) [2024-06-14 14:11:05,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:05,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:05,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 14:11:05,093 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:05,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash -744686302, now seen corresponding path program 11 times [2024-06-14 14:11:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:05,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362652236] [2024-06-14 14:11:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:05,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:05,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:05,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362652236] [2024-06-14 14:11:05,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362652236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:05,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:05,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:11:05,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183954248] [2024-06-14 14:11:05,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:05,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:11:05,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:11:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:11:05,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:05,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 483 transitions, 6077 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) [2024-06-14 14:11:05,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:05,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:05,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:06,290 INFO L124 PetriNetUnfolderBase]: 2987/5229 cut-off events. [2024-06-14 14:11:06,290 INFO L125 PetriNetUnfolderBase]: For 720120/720120 co-relation queries the response was YES. [2024-06-14 14:11:06,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39236 conditions, 5229 events. 2987/5229 cut-off events. For 720120/720120 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36302 event pairs, 549 based on Foata normal form. 1/5223 useless extension candidates. Maximal degree in co-relation 39065. Up to 4531 conditions per place. [2024-06-14 14:11:06,366 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 461 selfloop transitions, 48 changer transitions 0/518 dead transitions. [2024-06-14 14:11:06,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 518 transitions, 7500 flow [2024-06-14 14:11:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-14 14:11:06,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782828282828283 [2024-06-14 14:11:06,367 INFO L175 Difference]: Start difference. First operand has 364 places, 483 transitions, 6077 flow. Second operand 9 states and 229 transitions. [2024-06-14 14:11:06,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 518 transitions, 7500 flow [2024-06-14 14:11:10,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 518 transitions, 7247 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:10,544 INFO L231 Difference]: Finished difference. Result has 368 places, 489 transitions, 6021 flow [2024-06-14 14:11:10,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5845, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6021, PETRI_PLACES=368, PETRI_TRANSITIONS=489} [2024-06-14 14:11:10,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-14 14:11:10,544 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 489 transitions, 6021 flow [2024-06-14 14:11:10,544 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) [2024-06-14 14:11:10,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:10,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:10,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 14:11:10,545 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:10,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:10,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1997575596, now seen corresponding path program 3 times [2024-06-14 14:11:10,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:10,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772303246] [2024-06-14 14:11:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:10,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:10,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772303246] [2024-06-14 14:11:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772303246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:10,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:10,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:11:10,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345440038] [2024-06-14 14:11:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:10,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:11:10,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:11:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:11:10,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:10,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 489 transitions, 6021 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) [2024-06-14 14:11:10,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:10,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:10,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:11,780 INFO L124 PetriNetUnfolderBase]: 3014/5278 cut-off events. [2024-06-14 14:11:11,780 INFO L125 PetriNetUnfolderBase]: For 723302/723302 co-relation queries the response was YES. [2024-06-14 14:11:11,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38671 conditions, 5278 events. 3014/5278 cut-off events. For 723302/723302 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 36588 event pairs, 461 based on Foata normal form. 6/5277 useless extension candidates. Maximal degree in co-relation 38500. Up to 4472 conditions per place. [2024-06-14 14:11:11,847 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 475 selfloop transitions, 40 changer transitions 0/524 dead transitions. [2024-06-14 14:11:11,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 524 transitions, 7179 flow [2024-06-14 14:11:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-14 14:11:11,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201298701298701 [2024-06-14 14:11:11,848 INFO L175 Difference]: Start difference. First operand has 368 places, 489 transitions, 6021 flow. Second operand 7 states and 191 transitions. [2024-06-14 14:11:11,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 524 transitions, 7179 flow [2024-06-14 14:11:15,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 524 transitions, 7057 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:11:15,935 INFO L231 Difference]: Finished difference. Result has 370 places, 491 transitions, 6017 flow [2024-06-14 14:11:15,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5899, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6017, PETRI_PLACES=370, PETRI_TRANSITIONS=491} [2024-06-14 14:11:15,935 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-14 14:11:15,935 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 491 transitions, 6017 flow [2024-06-14 14:11:15,936 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) [2024-06-14 14:11:15,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:15,936 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, 1] [2024-06-14 14:11:15,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:11:15,936 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:15,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash 34081342, now seen corresponding path program 12 times [2024-06-14 14:11:15,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:15,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210448103] [2024-06-14 14:11:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:16,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:16,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210448103] [2024-06-14 14:11:16,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210448103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:16,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:16,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:16,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711474275] [2024-06-14 14:11:16,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:16,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:16,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:16,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:16,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 491 transitions, 6017 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:16,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:16,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:16,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:17,228 INFO L124 PetriNetUnfolderBase]: 3019/5280 cut-off events. [2024-06-14 14:11:17,228 INFO L125 PetriNetUnfolderBase]: For 699410/699410 co-relation queries the response was YES. [2024-06-14 14:11:17,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38917 conditions, 5280 events. 3019/5280 cut-off events. For 699410/699410 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36825 event pairs, 557 based on Foata normal form. 1/5273 useless extension candidates. Maximal degree in co-relation 38744. Up to 4307 conditions per place. [2024-06-14 14:11:17,303 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 359 selfloop transitions, 164 changer transitions 0/532 dead transitions. [2024-06-14 14:11:17,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 532 transitions, 8187 flow [2024-06-14 14:11:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 302 transitions. [2024-06-14 14:11:17,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571969696969697 [2024-06-14 14:11:17,305 INFO L175 Difference]: Start difference. First operand has 370 places, 491 transitions, 6017 flow. Second operand 12 states and 302 transitions. [2024-06-14 14:11:17,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 532 transitions, 8187 flow [2024-06-14 14:11:20,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 532 transitions, 8080 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:20,910 INFO L231 Difference]: Finished difference. Result has 377 places, 494 transitions, 6308 flow [2024-06-14 14:11:20,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5910, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6308, PETRI_PLACES=377, PETRI_TRANSITIONS=494} [2024-06-14 14:11:20,911 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-14 14:11:20,911 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 494 transitions, 6308 flow [2024-06-14 14:11:20,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:20,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:20,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:20,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:11:20,912 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:20,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash 45509182, now seen corresponding path program 13 times [2024-06-14 14:11:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:20,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219595282] [2024-06-14 14:11:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:21,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:21,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219595282] [2024-06-14 14:11:21,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219595282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:21,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:21,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:21,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435010287] [2024-06-14 14:11:21,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:21,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:21,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:21,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:21,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:21,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 494 transitions, 6308 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:21,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:21,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:21,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:22,148 INFO L124 PetriNetUnfolderBase]: 3016/5276 cut-off events. [2024-06-14 14:11:22,148 INFO L125 PetriNetUnfolderBase]: For 703102/703102 co-relation queries the response was YES. [2024-06-14 14:11:22,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39094 conditions, 5276 events. 3016/5276 cut-off events. For 703102/703102 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36787 event pairs, 557 based on Foata normal form. 1/5269 useless extension candidates. Maximal degree in co-relation 38920. Up to 4304 conditions per place. [2024-06-14 14:11:22,223 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 163 changer transitions 0/526 dead transitions. [2024-06-14 14:11:22,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 526 transitions, 8152 flow [2024-06-14 14:11:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-14 14:11:22,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5840909090909091 [2024-06-14 14:11:22,224 INFO L175 Difference]: Start difference. First operand has 377 places, 494 transitions, 6308 flow. Second operand 10 states and 257 transitions. [2024-06-14 14:11:22,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 526 transitions, 8152 flow [2024-06-14 14:11:26,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 526 transitions, 7821 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:26,919 INFO L231 Difference]: Finished difference. Result has 379 places, 494 transitions, 6309 flow [2024-06-14 14:11:26,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6309, PETRI_PLACES=379, PETRI_TRANSITIONS=494} [2024-06-14 14:11:26,920 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-14 14:11:26,920 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 494 transitions, 6309 flow [2024-06-14 14:11:26,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:26,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:26,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:26,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:11:26,920 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:26,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash 938743962, now seen corresponding path program 14 times [2024-06-14 14:11:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:26,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827586975] [2024-06-14 14:11:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:26,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:27,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827586975] [2024-06-14 14:11:27,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827586975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:27,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:27,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:27,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002111436] [2024-06-14 14:11:27,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:27,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:27,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:27,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:27,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:27,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 494 transitions, 6309 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:27,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:27,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:27,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:28,226 INFO L124 PetriNetUnfolderBase]: 3013/5272 cut-off events. [2024-06-14 14:11:28,226 INFO L125 PetriNetUnfolderBase]: For 705944/705944 co-relation queries the response was YES. [2024-06-14 14:11:28,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38902 conditions, 5272 events. 3013/5272 cut-off events. For 705944/705944 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36766 event pairs, 557 based on Foata normal form. 1/5265 useless extension candidates. Maximal degree in co-relation 38728. Up to 4301 conditions per place. [2024-06-14 14:11:28,296 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 355 selfloop transitions, 168 changer transitions 0/532 dead transitions. [2024-06-14 14:11:28,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 532 transitions, 7941 flow [2024-06-14 14:11:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:28,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2024-06-14 14:11:28,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785123966942148 [2024-06-14 14:11:28,297 INFO L175 Difference]: Start difference. First operand has 379 places, 494 transitions, 6309 flow. Second operand 11 states and 280 transitions. [2024-06-14 14:11:28,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 532 transitions, 7941 flow [2024-06-14 14:11:32,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 532 transitions, 7581 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:32,137 INFO L231 Difference]: Finished difference. Result has 381 places, 494 transitions, 6291 flow [2024-06-14 14:11:32,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5949, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6291, PETRI_PLACES=381, PETRI_TRANSITIONS=494} [2024-06-14 14:11:32,137 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-14 14:11:32,137 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 494 transitions, 6291 flow [2024-06-14 14:11:32,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:32,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:32,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:32,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:11:32,138 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:32,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1470950148, now seen corresponding path program 15 times [2024-06-14 14:11:32,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:32,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465528219] [2024-06-14 14:11:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:32,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:32,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:32,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465528219] [2024-06-14 14:11:32,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465528219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:32,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:32,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:32,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570865574] [2024-06-14 14:11:32,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:32,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:32,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:32,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:32,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:32,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 494 transitions, 6291 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:32,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:32,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:32,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:33,326 INFO L124 PetriNetUnfolderBase]: 3010/5281 cut-off events. [2024-06-14 14:11:33,326 INFO L125 PetriNetUnfolderBase]: For 707659/707659 co-relation queries the response was YES. [2024-06-14 14:11:33,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38843 conditions, 5281 events. 3010/5281 cut-off events. For 707659/707659 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36832 event pairs, 546 based on Foata normal form. 1/5281 useless extension candidates. Maximal degree in co-relation 38668. Up to 4577 conditions per place. [2024-06-14 14:11:33,401 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 465 selfloop transitions, 41 changer transitions 0/515 dead transitions. [2024-06-14 14:11:33,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 515 transitions, 7603 flow [2024-06-14 14:11:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:33,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:11:33,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 14:11:33,402 INFO L175 Difference]: Start difference. First operand has 381 places, 494 transitions, 6291 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:11:33,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 515 transitions, 7603 flow [2024-06-14 14:11:37,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 515 transitions, 7247 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:37,983 INFO L231 Difference]: Finished difference. Result has 378 places, 494 transitions, 6027 flow [2024-06-14 14:11:37,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5935, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6027, PETRI_PLACES=378, PETRI_TRANSITIONS=494} [2024-06-14 14:11:37,983 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-14 14:11:37,983 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 494 transitions, 6027 flow [2024-06-14 14:11:37,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:37,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:37,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:37,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:11:37,984 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:37,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1470564198, now seen corresponding path program 16 times [2024-06-14 14:11:37,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:37,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930092829] [2024-06-14 14:11:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:37,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:38,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:38,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930092829] [2024-06-14 14:11:38,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930092829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:38,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:38,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640832432] [2024-06-14 14:11:38,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:38,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:38,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:38,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:38,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:38,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:38,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 494 transitions, 6027 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:38,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:38,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:38,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:39,229 INFO L124 PetriNetUnfolderBase]: 3007/5277 cut-off events. [2024-06-14 14:11:39,229 INFO L125 PetriNetUnfolderBase]: For 709352/709352 co-relation queries the response was YES. [2024-06-14 14:11:39,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38388 conditions, 5277 events. 3007/5277 cut-off events. For 709352/709352 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36771 event pairs, 546 based on Foata normal form. 1/5277 useless extension candidates. Maximal degree in co-relation 38212. Up to 4574 conditions per place. [2024-06-14 14:11:39,308 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 459 selfloop transitions, 43 changer transitions 0/511 dead transitions. [2024-06-14 14:11:39,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 511 transitions, 7073 flow [2024-06-14 14:11:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:11:39,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-14 14:11:39,309 INFO L175 Difference]: Start difference. First operand has 378 places, 494 transitions, 6027 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:11:39,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 511 transitions, 7073 flow [2024-06-14 14:11:44,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 511 transitions, 7001 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 14:11:44,169 INFO L231 Difference]: Finished difference. Result has 381 places, 494 transitions, 6051 flow [2024-06-14 14:11:44,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6051, PETRI_PLACES=381, PETRI_TRANSITIONS=494} [2024-06-14 14:11:44,170 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-14 14:11:44,170 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 494 transitions, 6051 flow [2024-06-14 14:11:44,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:44,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:44,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:44,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:11:44,170 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:44,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:44,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1138272800, now seen corresponding path program 17 times [2024-06-14 14:11:44,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:44,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795967372] [2024-06-14 14:11:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:44,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:44,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:44,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795967372] [2024-06-14 14:11:44,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795967372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:44,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:44,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:44,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125308059] [2024-06-14 14:11:44,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:44,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:44,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:44,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:44,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 494 transitions, 6051 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:44,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:44,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:44,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:45,465 INFO L124 PetriNetUnfolderBase]: 3012/5273 cut-off events. [2024-06-14 14:11:45,465 INFO L125 PetriNetUnfolderBase]: For 720356/720356 co-relation queries the response was YES. [2024-06-14 14:11:45,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38530 conditions, 5273 events. 3012/5273 cut-off events. For 720356/720356 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36762 event pairs, 563 based on Foata normal form. 1/5266 useless extension candidates. Maximal degree in co-relation 38353. Up to 4301 conditions per place. [2024-06-14 14:11:45,537 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 338 selfloop transitions, 171 changer transitions 0/518 dead transitions. [2024-06-14 14:11:45,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 518 transitions, 7414 flow [2024-06-14 14:11:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:11:45,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 14:11:45,538 INFO L175 Difference]: Start difference. First operand has 381 places, 494 transitions, 6051 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:11:45,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 518 transitions, 7414 flow [2024-06-14 14:11:50,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 518 transitions, 7294 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 14:11:50,665 INFO L231 Difference]: Finished difference. Result has 384 places, 497 transitions, 6322 flow [2024-06-14 14:11:50,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6322, PETRI_PLACES=384, PETRI_TRANSITIONS=497} [2024-06-14 14:11:50,666 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 339 predicate places. [2024-06-14 14:11:50,666 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 497 transitions, 6322 flow [2024-06-14 14:11:50,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:50,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:50,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:50,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:11:50,666 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:50,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:50,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1805210694, now seen corresponding path program 12 times [2024-06-14 14:11:50,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:50,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171176345] [2024-06-14 14:11:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:50,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:50,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:50,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171176345] [2024-06-14 14:11:50,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171176345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:50,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:50,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:11:50,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009597640] [2024-06-14 14:11:50,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:50,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:11:50,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:11:50,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:11:50,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:50,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 497 transitions, 6322 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) [2024-06-14 14:11:50,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:50,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:50,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:51,815 INFO L124 PetriNetUnfolderBase]: 3025/5292 cut-off events. [2024-06-14 14:11:51,816 INFO L125 PetriNetUnfolderBase]: For 740370/740370 co-relation queries the response was YES. [2024-06-14 14:11:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39210 conditions, 5292 events. 3025/5292 cut-off events. For 740370/740370 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36910 event pairs, 571 based on Foata normal form. 1/5282 useless extension candidates. Maximal degree in co-relation 39032. Up to 4388 conditions per place. [2024-06-14 14:11:51,894 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 375 selfloop transitions, 141 changer transitions 0/525 dead transitions. [2024-06-14 14:11:51,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 525 transitions, 8004 flow [2024-06-14 14:11:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 14:11:51,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038961038961039 [2024-06-14 14:11:51,895 INFO L175 Difference]: Start difference. First operand has 384 places, 497 transitions, 6322 flow. Second operand 7 states and 186 transitions. [2024-06-14 14:11:51,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 525 transitions, 8004 flow [2024-06-14 14:11:55,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 525 transitions, 7707 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 14:11:55,961 INFO L231 Difference]: Finished difference. Result has 384 places, 503 transitions, 6402 flow [2024-06-14 14:11:55,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6025, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6402, PETRI_PLACES=384, PETRI_TRANSITIONS=503} [2024-06-14 14:11:55,961 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 339 predicate places. [2024-06-14 14:11:55,961 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 503 transitions, 6402 flow [2024-06-14 14:11:55,961 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) [2024-06-14 14:11:55,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:55,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:55,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:11:55,962 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:55,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:55,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2050282112, now seen corresponding path program 13 times [2024-06-14 14:11:55,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:55,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556618766] [2024-06-14 14:11:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:55,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:56,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:56,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556618766] [2024-06-14 14:11:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556618766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:56,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:56,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:11:56,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266410721] [2024-06-14 14:11:56,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:56,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:11:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:11:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:11:56,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:56,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 503 transitions, 6402 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) [2024-06-14 14:11:56,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:56,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:56,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:57,114 INFO L124 PetriNetUnfolderBase]: 3030/5301 cut-off events. [2024-06-14 14:11:57,114 INFO L125 PetriNetUnfolderBase]: For 752826/752826 co-relation queries the response was YES. [2024-06-14 14:11:57,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39266 conditions, 5301 events. 3030/5301 cut-off events. For 752826/752826 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 36991 event pairs, 571 based on Foata normal form. 1/5291 useless extension candidates. Maximal degree in co-relation 39087. Up to 4394 conditions per place. [2024-06-14 14:11:57,196 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 375 selfloop transitions, 141 changer transitions 0/525 dead transitions. [2024-06-14 14:11:57,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 525 transitions, 8042 flow [2024-06-14 14:11:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:11:57,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-14 14:11:57,197 INFO L175 Difference]: Start difference. First operand has 384 places, 503 transitions, 6402 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:11:57,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 525 transitions, 8042 flow [2024-06-14 14:12:01,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 525 transitions, 7849 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 14:12:01,965 INFO L231 Difference]: Finished difference. Result has 388 places, 506 transitions, 6548 flow [2024-06-14 14:12:01,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6548, PETRI_PLACES=388, PETRI_TRANSITIONS=506} [2024-06-14 14:12:01,966 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-14 14:12:01,966 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 506 transitions, 6548 flow [2024-06-14 14:12:01,966 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) [2024-06-14 14:12:01,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:01,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:01,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:12:01,967 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:01,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:01,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1772985134, now seen corresponding path program 14 times [2024-06-14 14:12:01,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:01,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816366883] [2024-06-14 14:12:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:02,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:02,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816366883] [2024-06-14 14:12:02,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816366883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:02,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:02,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:02,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079680636] [2024-06-14 14:12:02,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:02,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:02,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:02,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:02,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 506 transitions, 6548 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:02,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:02,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:02,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:03,193 INFO L124 PetriNetUnfolderBase]: 3035/5310 cut-off events. [2024-06-14 14:12:03,193 INFO L125 PetriNetUnfolderBase]: For 765189/765189 co-relation queries the response was YES. [2024-06-14 14:12:03,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39445 conditions, 5310 events. 3035/5310 cut-off events. For 765189/765189 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 37069 event pairs, 571 based on Foata normal form. 1/5300 useless extension candidates. Maximal degree in co-relation 39265. Up to 4400 conditions per place. [2024-06-14 14:12:03,271 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 370 selfloop transitions, 146 changer transitions 0/525 dead transitions. [2024-06-14 14:12:03,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 525 transitions, 7929 flow [2024-06-14 14:12:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:12:03,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 14:12:03,272 INFO L175 Difference]: Start difference. First operand has 388 places, 506 transitions, 6548 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:12:03,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 525 transitions, 7929 flow [2024-06-14 14:12:08,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 525 transitions, 7650 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 14:12:08,543 INFO L231 Difference]: Finished difference. Result has 392 places, 509 transitions, 6620 flow [2024-06-14 14:12:08,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6272, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6620, PETRI_PLACES=392, PETRI_TRANSITIONS=509} [2024-06-14 14:12:08,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-14 14:12:08,544 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 509 transitions, 6620 flow [2024-06-14 14:12:08,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:08,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:08,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:08,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:12:08,544 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:08,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1405994656, now seen corresponding path program 18 times [2024-06-14 14:12:08,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:08,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824009553] [2024-06-14 14:12:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:08,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:08,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824009553] [2024-06-14 14:12:08,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824009553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:08,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:08,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:08,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550514639] [2024-06-14 14:12:08,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:08,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:08,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:08,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:08,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:08,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:08,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 509 transitions, 6620 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:08,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:08,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:08,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:09,799 INFO L124 PetriNetUnfolderBase]: 3032/5294 cut-off events. [2024-06-14 14:12:09,799 INFO L125 PetriNetUnfolderBase]: For 769164/769164 co-relation queries the response was YES. [2024-06-14 14:12:09,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39365 conditions, 5294 events. 3032/5294 cut-off events. For 769164/769164 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 37018 event pairs, 591 based on Foata normal form. 1/5287 useless extension candidates. Maximal degree in co-relation 39184. Up to 4330 conditions per place. [2024-06-14 14:12:09,879 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 343 selfloop transitions, 174 changer transitions 0/526 dead transitions. [2024-06-14 14:12:09,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 526 transitions, 7694 flow [2024-06-14 14:12:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 14:12:09,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:12:09,880 INFO L175 Difference]: Start difference. First operand has 392 places, 509 transitions, 6620 flow. Second operand 10 states and 242 transitions. [2024-06-14 14:12:09,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 526 transitions, 7694 flow [2024-06-14 14:12:15,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 526 transitions, 7358 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:15,145 INFO L231 Difference]: Finished difference. Result has 396 places, 509 transitions, 6638 flow [2024-06-14 14:12:15,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6284, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6638, PETRI_PLACES=396, PETRI_TRANSITIONS=509} [2024-06-14 14:12:15,145 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-14 14:12:15,146 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 509 transitions, 6638 flow [2024-06-14 14:12:15,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:15,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:15,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:15,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:12:15,146 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:15,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1389661048, now seen corresponding path program 15 times [2024-06-14 14:12:15,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:15,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997753346] [2024-06-14 14:12:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:15,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997753346] [2024-06-14 14:12:15,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997753346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:15,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:15,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:12:15,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047634210] [2024-06-14 14:12:15,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:15,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:12:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:12:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:12:15,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:15,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 509 transitions, 6638 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) [2024-06-14 14:12:15,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:15,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:15,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:16,327 INFO L124 PetriNetUnfolderBase]: 3037/5311 cut-off events. [2024-06-14 14:12:16,327 INFO L125 PetriNetUnfolderBase]: For 779990/779990 co-relation queries the response was YES. [2024-06-14 14:12:16,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39584 conditions, 5311 events. 3037/5311 cut-off events. For 779990/779990 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 37042 event pairs, 582 based on Foata normal form. 1/5293 useless extension candidates. Maximal degree in co-relation 39402. Up to 4402 conditions per place. [2024-06-14 14:12:16,409 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 380 selfloop transitions, 149 changer transitions 0/538 dead transitions. [2024-06-14 14:12:16,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 538 transitions, 8593 flow [2024-06-14 14:12:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:12:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:12:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 14:12:16,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2024-06-14 14:12:16,409 INFO L175 Difference]: Start difference. First operand has 396 places, 509 transitions, 6638 flow. Second operand 7 states and 192 transitions. [2024-06-14 14:12:16,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 538 transitions, 8593 flow [2024-06-14 14:12:21,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 538 transitions, 8293 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:12:21,477 INFO L231 Difference]: Finished difference. Result has 396 places, 512 transitions, 6689 flow [2024-06-14 14:12:21,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6689, PETRI_PLACES=396, PETRI_TRANSITIONS=512} [2024-06-14 14:12:21,477 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-14 14:12:21,477 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 512 transitions, 6689 flow [2024-06-14 14:12:21,477 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) [2024-06-14 14:12:21,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:21,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:21,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:12:21,478 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:21,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:21,478 INFO L85 PathProgramCache]: Analyzing trace with hash 41490880, now seen corresponding path program 16 times [2024-06-14 14:12:21,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:21,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499170048] [2024-06-14 14:12:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:21,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:21,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:21,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499170048] [2024-06-14 14:12:21,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499170048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:21,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:21,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:12:21,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267956341] [2024-06-14 14:12:21,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:21,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:12:21,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:12:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:12:21,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:21,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 512 transitions, 6689 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) [2024-06-14 14:12:21,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:21,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:21,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:22,656 INFO L124 PetriNetUnfolderBase]: 3042/5320 cut-off events. [2024-06-14 14:12:22,656 INFO L125 PetriNetUnfolderBase]: For 791768/791768 co-relation queries the response was YES. [2024-06-14 14:12:22,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39674 conditions, 5320 events. 3042/5320 cut-off events. For 791768/791768 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37144 event pairs, 582 based on Foata normal form. 1/5302 useless extension candidates. Maximal degree in co-relation 39491. Up to 4408 conditions per place. [2024-06-14 14:12:22,733 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 377 selfloop transitions, 151 changer transitions 0/537 dead transitions. [2024-06-14 14:12:22,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 537 transitions, 8380 flow [2024-06-14 14:12:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:12:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:12:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 14:12:22,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 14:12:22,734 INFO L175 Difference]: Start difference. First operand has 396 places, 512 transitions, 6689 flow. Second operand 7 states and 187 transitions. [2024-06-14 14:12:22,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 537 transitions, 8380 flow [2024-06-14 14:12:28,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 537 transitions, 7814 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:12:28,324 INFO L231 Difference]: Finished difference. Result has 396 places, 515 transitions, 6484 flow [2024-06-14 14:12:28,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6135, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6484, PETRI_PLACES=396, PETRI_TRANSITIONS=515} [2024-06-14 14:12:28,325 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-14 14:12:28,325 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 515 transitions, 6484 flow [2024-06-14 14:12:28,325 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) [2024-06-14 14:12:28,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:28,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:28,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:12:28,325 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:28,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1383037976, now seen corresponding path program 17 times [2024-06-14 14:12:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:28,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146606513] [2024-06-14 14:12:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:28,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:28,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146606513] [2024-06-14 14:12:28,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146606513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:28,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:28,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:28,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697202189] [2024-06-14 14:12:28,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:28,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:28,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:28,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:28,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:28,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:28,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 515 transitions, 6484 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:28,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:28,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:28,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:29,637 INFO L124 PetriNetUnfolderBase]: 3047/5315 cut-off events. [2024-06-14 14:12:29,638 INFO L125 PetriNetUnfolderBase]: For 801407/801407 co-relation queries the response was YES. [2024-06-14 14:12:29,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39683 conditions, 5315 events. 3047/5315 cut-off events. For 801407/801407 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 37127 event pairs, 613 based on Foata normal form. 1/5308 useless extension candidates. Maximal degree in co-relation 39500. Up to 4414 conditions per place. [2024-06-14 14:12:29,709 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 371 selfloop transitions, 151 changer transitions 0/531 dead transitions. [2024-06-14 14:12:29,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 531 transitions, 7874 flow [2024-06-14 14:12:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:12:29,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:12:29,710 INFO L175 Difference]: Start difference. First operand has 396 places, 515 transitions, 6484 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:12:29,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 531 transitions, 7874 flow [2024-06-14 14:12:34,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 531 transitions, 7575 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 14:12:34,738 INFO L231 Difference]: Finished difference. Result has 400 places, 518 transitions, 6543 flow [2024-06-14 14:12:34,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6543, PETRI_PLACES=400, PETRI_TRANSITIONS=518} [2024-06-14 14:12:34,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 355 predicate places. [2024-06-14 14:12:34,739 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 518 transitions, 6543 flow [2024-06-14 14:12:34,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:34,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:34,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:34,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:12:34,739 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:34,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:34,739 INFO L85 PathProgramCache]: Analyzing trace with hash 991468322, now seen corresponding path program 18 times [2024-06-14 14:12:34,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:34,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910640475] [2024-06-14 14:12:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:34,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:34,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:34,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910640475] [2024-06-14 14:12:34,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910640475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:34,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:34,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:12:34,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812359535] [2024-06-14 14:12:34,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:34,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:12:34,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:34,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:12:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:12:34,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:34,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 518 transitions, 6543 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) [2024-06-14 14:12:34,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:34,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:34,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:35,948 INFO L124 PetriNetUnfolderBase]: 3060/5351 cut-off events. [2024-06-14 14:12:35,948 INFO L125 PetriNetUnfolderBase]: For 821890/821890 co-relation queries the response was YES. [2024-06-14 14:12:36,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40040 conditions, 5351 events. 3060/5351 cut-off events. For 821890/821890 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 37379 event pairs, 582 based on Foata normal form. 1/5333 useless extension candidates. Maximal degree in co-relation 39856. Up to 4429 conditions per place. [2024-06-14 14:12:36,032 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 372 selfloop transitions, 162 changer transitions 0/543 dead transitions. [2024-06-14 14:12:36,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 543 transitions, 8293 flow [2024-06-14 14:12:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:12:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:12:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:12:36,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-14 14:12:36,033 INFO L175 Difference]: Start difference. First operand has 400 places, 518 transitions, 6543 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:12:36,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 543 transitions, 8293 flow [2024-06-14 14:12:41,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 543 transitions, 8044 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:12:41,899 INFO L231 Difference]: Finished difference. Result has 402 places, 524 transitions, 6724 flow [2024-06-14 14:12:41,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6300, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6724, PETRI_PLACES=402, PETRI_TRANSITIONS=524} [2024-06-14 14:12:41,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-14 14:12:41,899 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 524 transitions, 6724 flow [2024-06-14 14:12:41,899 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) [2024-06-14 14:12:41,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:41,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:41,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:12:41,900 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:41,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:41,900 INFO L85 PathProgramCache]: Analyzing trace with hash -316589632, now seen corresponding path program 19 times [2024-06-14 14:12:41,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:41,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654885019] [2024-06-14 14:12:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:41,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:42,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:42,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654885019] [2024-06-14 14:12:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654885019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:42,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:42,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:12:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971136994] [2024-06-14 14:12:42,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:42,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:12:42,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:12:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:12:42,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:42,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 524 transitions, 6724 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) [2024-06-14 14:12:42,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:42,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:42,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:43,138 INFO L124 PetriNetUnfolderBase]: 3057/5361 cut-off events. [2024-06-14 14:12:43,138 INFO L125 PetriNetUnfolderBase]: For 824891/824891 co-relation queries the response was YES. [2024-06-14 14:12:43,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39988 conditions, 5361 events. 3057/5361 cut-off events. For 824891/824891 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37521 event pairs, 550 based on Foata normal form. 1/5355 useless extension candidates. Maximal degree in co-relation 39802. Up to 4658 conditions per place. [2024-06-14 14:12:43,221 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 495 selfloop transitions, 37 changer transitions 0/541 dead transitions. [2024-06-14 14:12:43,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 541 transitions, 7830 flow [2024-06-14 14:12:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:12:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:12:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:12:43,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-14 14:12:43,222 INFO L175 Difference]: Start difference. First operand has 402 places, 524 transitions, 6724 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:12:43,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 541 transitions, 7830 flow [2024-06-14 14:12:49,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 541 transitions, 7533 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 14:12:49,140 INFO L231 Difference]: Finished difference. Result has 406 places, 524 transitions, 6507 flow [2024-06-14 14:12:49,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6427, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6507, PETRI_PLACES=406, PETRI_TRANSITIONS=524} [2024-06-14 14:12:49,141 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-14 14:12:49,141 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 524 transitions, 6507 flow [2024-06-14 14:12:49,141 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) [2024-06-14 14:12:49,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:49,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:49,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:12:49,141 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:49,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1257664954, now seen corresponding path program 20 times [2024-06-14 14:12:49,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:49,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46635141] [2024-06-14 14:12:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:49,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:49,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46635141] [2024-06-14 14:12:49,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46635141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:49,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:49,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:49,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527828463] [2024-06-14 14:12:49,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:49,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:49,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:49,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:49,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 524 transitions, 6507 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:49,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:49,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:49,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:50,413 INFO L124 PetriNetUnfolderBase]: 3054/5335 cut-off events. [2024-06-14 14:12:50,413 INFO L125 PetriNetUnfolderBase]: For 827666/827666 co-relation queries the response was YES. [2024-06-14 14:12:50,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39578 conditions, 5335 events. 3054/5335 cut-off events. For 827666/827666 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37346 event pairs, 606 based on Foata normal form. 1/5328 useless extension candidates. Maximal degree in co-relation 39391. Up to 4423 conditions per place. [2024-06-14 14:12:50,492 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 364 selfloop transitions, 166 changer transitions 0/539 dead transitions. [2024-06-14 14:12:50,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 539 transitions, 7873 flow [2024-06-14 14:12:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-14 14:12:50,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:12:50,493 INFO L175 Difference]: Start difference. First operand has 406 places, 524 transitions, 6507 flow. Second operand 10 states and 240 transitions. [2024-06-14 14:12:50,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 539 transitions, 7873 flow [2024-06-14 14:12:56,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 539 transitions, 7775 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:12:56,230 INFO L231 Difference]: Finished difference. Result has 411 places, 524 transitions, 6747 flow [2024-06-14 14:12:56,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6409, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6747, PETRI_PLACES=411, PETRI_TRANSITIONS=524} [2024-06-14 14:12:56,231 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 366 predicate places. [2024-06-14 14:12:56,231 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 524 transitions, 6747 flow [2024-06-14 14:12:56,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:56,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:56,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:12:56,232 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:56,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1720083106, now seen corresponding path program 21 times [2024-06-14 14:12:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:56,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856177359] [2024-06-14 14:12:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:56,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:56,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856177359] [2024-06-14 14:12:56,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856177359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:56,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:56,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:56,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808994362] [2024-06-14 14:12:56,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:56,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:56,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:56,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:56,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:56,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 524 transitions, 6747 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:56,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:56,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:56,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:57,428 INFO L124 PetriNetUnfolderBase]: 3051/5331 cut-off events. [2024-06-14 14:12:57,428 INFO L125 PetriNetUnfolderBase]: For 831014/831014 co-relation queries the response was YES. [2024-06-14 14:12:57,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39794 conditions, 5331 events. 3051/5331 cut-off events. For 831014/831014 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37290 event pairs, 606 based on Foata normal form. 1/5324 useless extension candidates. Maximal degree in co-relation 39606. Up to 4420 conditions per place. [2024-06-14 14:12:57,509 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 364 selfloop transitions, 164 changer transitions 0/537 dead transitions. [2024-06-14 14:12:57,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 537 transitions, 8107 flow [2024-06-14 14:12:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:12:57,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:12:57,510 INFO L175 Difference]: Start difference. First operand has 411 places, 524 transitions, 6747 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:12:57,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 537 transitions, 8107 flow [2024-06-14 14:13:02,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 537 transitions, 7396 flow, removed 21 selfloop flow, removed 13 redundant places. [2024-06-14 14:13:02,457 INFO L231 Difference]: Finished difference. Result has 406 places, 524 transitions, 6370 flow [2024-06-14 14:13:02,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6036, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6370, PETRI_PLACES=406, PETRI_TRANSITIONS=524} [2024-06-14 14:13:02,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-14 14:13:02,458 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 524 transitions, 6370 flow [2024-06-14 14:13:02,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:02,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:02,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:02,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:13:02,459 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:02,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:02,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1720260736, now seen corresponding path program 22 times [2024-06-14 14:13:02,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:02,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399592829] [2024-06-14 14:13:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:02,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:02,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:02,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399592829] [2024-06-14 14:13:02,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399592829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:02,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:02,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:02,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078647954] [2024-06-14 14:13:02,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:02,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:02,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:02,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:02,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:02,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:02,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 524 transitions, 6370 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:02,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:02,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:02,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:03,685 INFO L124 PetriNetUnfolderBase]: 3048/5343 cut-off events. [2024-06-14 14:13:03,685 INFO L125 PetriNetUnfolderBase]: For 828383/828383 co-relation queries the response was YES. [2024-06-14 14:13:03,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39553 conditions, 5343 events. 3048/5343 cut-off events. For 828383/828383 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37406 event pairs, 563 based on Foata normal form. 1/5339 useless extension candidates. Maximal degree in co-relation 39365. Up to 4646 conditions per place. [2024-06-14 14:13:03,766 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 490 selfloop transitions, 37 changer transitions 0/536 dead transitions. [2024-06-14 14:13:03,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 536 transitions, 7452 flow [2024-06-14 14:13:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:13:03,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-14 14:13:03,767 INFO L175 Difference]: Start difference. First operand has 406 places, 524 transitions, 6370 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:13:03,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 536 transitions, 7452 flow [2024-06-14 14:13:09,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 536 transitions, 7091 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 14:13:09,016 INFO L231 Difference]: Finished difference. Result has 407 places, 524 transitions, 6089 flow [2024-06-14 14:13:09,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6009, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6089, PETRI_PLACES=407, PETRI_TRANSITIONS=524} [2024-06-14 14:13:09,016 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 362 predicate places. [2024-06-14 14:13:09,017 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 524 transitions, 6089 flow [2024-06-14 14:13:09,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:09,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:09,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:09,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:13:09,017 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:09,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash 702534976, now seen corresponding path program 3 times [2024-06-14 14:13:09,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:09,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321753238] [2024-06-14 14:13:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:09,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:09,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:09,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321753238] [2024-06-14 14:13:09,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321753238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:09,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:09,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:09,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331015038] [2024-06-14 14:13:09,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:09,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:09,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:09,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:09,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:09,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:09,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 524 transitions, 6089 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:09,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:09,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:09,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:10,303 INFO L124 PetriNetUnfolderBase]: 3069/5372 cut-off events. [2024-06-14 14:13:10,303 INFO L125 PetriNetUnfolderBase]: For 872234/872234 co-relation queries the response was YES. [2024-06-14 14:13:10,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40092 conditions, 5372 events. 3069/5372 cut-off events. For 872234/872234 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37593 event pairs, 546 based on Foata normal form. 2/5369 useless extension candidates. Maximal degree in co-relation 39903. Up to 4558 conditions per place. [2024-06-14 14:13:10,388 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 480 selfloop transitions, 75 changer transitions 0/564 dead transitions. [2024-06-14 14:13:10,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 564 transitions, 7749 flow [2024-06-14 14:13:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:13:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:13:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 272 transitions. [2024-06-14 14:13:10,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619834710743802 [2024-06-14 14:13:10,389 INFO L175 Difference]: Start difference. First operand has 407 places, 524 transitions, 6089 flow. Second operand 11 states and 272 transitions. [2024-06-14 14:13:10,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 564 transitions, 7749 flow [2024-06-14 14:13:15,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 564 transitions, 7635 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:13:15,478 INFO L231 Difference]: Finished difference. Result has 409 places, 528 transitions, 6318 flow [2024-06-14 14:13:15,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5975, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6318, PETRI_PLACES=409, PETRI_TRANSITIONS=528} [2024-06-14 14:13:15,478 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 364 predicate places. [2024-06-14 14:13:15,479 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 528 transitions, 6318 flow [2024-06-14 14:13:15,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:15,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:15,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:15,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:13:15,479 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:15,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash 45518110, now seen corresponding path program 4 times [2024-06-14 14:13:15,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:15,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045096291] [2024-06-14 14:13:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:15,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:15,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:15,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045096291] [2024-06-14 14:13:15,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045096291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:15,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:15,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:15,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427862654] [2024-06-14 14:13:15,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:15,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:15,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:15,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:15,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:15,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 528 transitions, 6318 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:15,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:15,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:15,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:16,867 INFO L124 PetriNetUnfolderBase]: 3064/5372 cut-off events. [2024-06-14 14:13:16,867 INFO L125 PetriNetUnfolderBase]: For 866468/866468 co-relation queries the response was YES. [2024-06-14 14:13:16,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40031 conditions, 5372 events. 3064/5372 cut-off events. For 866468/866468 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37629 event pairs, 554 based on Foata normal form. 2/5369 useless extension candidates. Maximal degree in co-relation 39841. Up to 4586 conditions per place. [2024-06-14 14:13:16,946 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 479 selfloop transitions, 70 changer transitions 0/558 dead transitions. [2024-06-14 14:13:16,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 558 transitions, 7490 flow [2024-06-14 14:13:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-14 14:13:16,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-14 14:13:16,947 INFO L175 Difference]: Start difference. First operand has 409 places, 528 transitions, 6318 flow. Second operand 10 states and 247 transitions. [2024-06-14 14:13:16,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 558 transitions, 7490 flow [2024-06-14 14:13:21,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 558 transitions, 7220 flow, removed 86 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:21,339 INFO L231 Difference]: Finished difference. Result has 411 places, 528 transitions, 6193 flow [2024-06-14 14:13:21,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6048, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6193, PETRI_PLACES=411, PETRI_TRANSITIONS=528} [2024-06-14 14:13:21,340 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 366 predicate places. [2024-06-14 14:13:21,340 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 528 transitions, 6193 flow [2024-06-14 14:13:21,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:21,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:21,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:21,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:13:21,340 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:21,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1233492262, now seen corresponding path program 2 times [2024-06-14 14:13:21,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:21,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585595571] [2024-06-14 14:13:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:21,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:21,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:21,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585595571] [2024-06-14 14:13:21,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585595571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:21,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:21,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:21,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686293567] [2024-06-14 14:13:21,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:21,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:21,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:21,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 528 transitions, 6193 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:21,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:21,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:21,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:22,630 INFO L124 PetriNetUnfolderBase]: 3069/5379 cut-off events. [2024-06-14 14:13:22,630 INFO L125 PetriNetUnfolderBase]: For 863967/863967 co-relation queries the response was YES. [2024-06-14 14:13:22,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39998 conditions, 5379 events. 3069/5379 cut-off events. For 863967/863967 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 37690 event pairs, 558 based on Foata normal form. 1/5373 useless extension candidates. Maximal degree in co-relation 39806. Up to 4452 conditions per place. [2024-06-14 14:13:22,718 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 413 selfloop transitions, 141 changer transitions 0/563 dead transitions. [2024-06-14 14:13:22,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 563 transitions, 8266 flow [2024-06-14 14:13:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-14 14:13:22,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-14 14:13:22,719 INFO L175 Difference]: Start difference. First operand has 411 places, 528 transitions, 6193 flow. Second operand 10 states and 256 transitions. [2024-06-14 14:13:22,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 563 transitions, 8266 flow [2024-06-14 14:13:27,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 563 transitions, 8104 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 14:13:27,572 INFO L231 Difference]: Finished difference. Result has 412 places, 531 transitions, 6360 flow [2024-06-14 14:13:27,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6360, PETRI_PLACES=412, PETRI_TRANSITIONS=531} [2024-06-14 14:13:27,573 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-14 14:13:27,573 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 531 transitions, 6360 flow [2024-06-14 14:13:27,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:27,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:27,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:27,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:13:27,573 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:27,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash -263923586, now seen corresponding path program 3 times [2024-06-14 14:13:27,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:27,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740324641] [2024-06-14 14:13:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:27,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:27,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:27,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740324641] [2024-06-14 14:13:27,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740324641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:27,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:27,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:27,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023516271] [2024-06-14 14:13:27,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:27,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:27,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:27,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:27,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 531 transitions, 6360 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:27,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:27,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:27,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:28,802 INFO L124 PetriNetUnfolderBase]: 3074/5397 cut-off events. [2024-06-14 14:13:28,802 INFO L125 PetriNetUnfolderBase]: For 876009/876009 co-relation queries the response was YES. [2024-06-14 14:13:28,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40310 conditions, 5397 events. 3074/5397 cut-off events. For 876009/876009 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37795 event pairs, 544 based on Foata normal form. 1/5397 useless extension candidates. Maximal degree in co-relation 40117. Up to 4681 conditions per place. [2024-06-14 14:13:28,884 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 500 selfloop transitions, 43 changer transitions 0/552 dead transitions. [2024-06-14 14:13:28,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 552 transitions, 7822 flow [2024-06-14 14:13:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:13:28,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 14:13:28,885 INFO L175 Difference]: Start difference. First operand has 412 places, 531 transitions, 6360 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:13:28,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 552 transitions, 7822 flow [2024-06-14 14:13:35,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 552 transitions, 7582 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 14:13:35,340 INFO L231 Difference]: Finished difference. Result has 413 places, 534 transitions, 6264 flow [2024-06-14 14:13:35,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6264, PETRI_PLACES=413, PETRI_TRANSITIONS=534} [2024-06-14 14:13:35,341 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-14 14:13:35,341 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 534 transitions, 6264 flow [2024-06-14 14:13:35,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:35,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:35,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:35,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:13:35,341 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:35,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:35,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1527701798, now seen corresponding path program 4 times [2024-06-14 14:13:35,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:35,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627241047] [2024-06-14 14:13:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:35,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:35,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627241047] [2024-06-14 14:13:35,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627241047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:35,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:35,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:35,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350214666] [2024-06-14 14:13:35,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:35,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:35,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:35,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:35,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:35,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 534 transitions, 6264 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:35,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:35,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:36,659 INFO L124 PetriNetUnfolderBase]: 3071/5393 cut-off events. [2024-06-14 14:13:36,659 INFO L125 PetriNetUnfolderBase]: For 876918/876918 co-relation queries the response was YES. [2024-06-14 14:13:36,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39968 conditions, 5393 events. 3071/5393 cut-off events. For 876918/876918 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37816 event pairs, 544 based on Foata normal form. 1/5393 useless extension candidates. Maximal degree in co-relation 39774. Up to 4678 conditions per place. [2024-06-14 14:13:36,744 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 500 selfloop transitions, 43 changer transitions 0/552 dead transitions. [2024-06-14 14:13:36,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 552 transitions, 7394 flow [2024-06-14 14:13:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:13:36,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:13:36,745 INFO L175 Difference]: Start difference. First operand has 413 places, 534 transitions, 6264 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:13:36,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 552 transitions, 7394 flow [2024-06-14 14:13:42,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 552 transitions, 7284 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 14:13:42,869 INFO L231 Difference]: Finished difference. Result has 416 places, 534 transitions, 6250 flow [2024-06-14 14:13:42,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6250, PETRI_PLACES=416, PETRI_TRANSITIONS=534} [2024-06-14 14:13:42,869 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-14 14:13:42,869 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 534 transitions, 6250 flow [2024-06-14 14:13:42,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:42,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:42,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:42,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:13:42,870 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:42,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:42,870 INFO L85 PathProgramCache]: Analyzing trace with hash -519522178, now seen corresponding path program 5 times [2024-06-14 14:13:42,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:42,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328417473] [2024-06-14 14:13:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:42,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:43,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:43,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328417473] [2024-06-14 14:13:43,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328417473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:43,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:43,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:43,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592237016] [2024-06-14 14:13:43,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:43,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:43,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:43,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:43,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 534 transitions, 6250 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:43,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:43,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:43,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:44,121 INFO L124 PetriNetUnfolderBase]: 3076/5393 cut-off events. [2024-06-14 14:13:44,122 INFO L125 PetriNetUnfolderBase]: For 888685/888685 co-relation queries the response was YES. [2024-06-14 14:13:44,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40080 conditions, 5393 events. 3076/5393 cut-off events. For 888685/888685 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 37894 event pairs, 558 based on Foata normal form. 1/5387 useless extension candidates. Maximal degree in co-relation 39885. Up to 4461 conditions per place. [2024-06-14 14:13:44,202 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 412 selfloop transitions, 147 changer transitions 0/568 dead transitions. [2024-06-14 14:13:44,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 568 transitions, 8341 flow [2024-06-14 14:13:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:13:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:13:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-14 14:13:44,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-06-14 14:13:44,203 INFO L175 Difference]: Start difference. First operand has 416 places, 534 transitions, 6250 flow. Second operand 9 states and 236 transitions. [2024-06-14 14:13:44,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 568 transitions, 8341 flow [2024-06-14 14:13:49,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 568 transitions, 8223 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:49,999 INFO L231 Difference]: Finished difference. Result has 417 places, 537 transitions, 6471 flow [2024-06-14 14:13:49,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6138, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6471, PETRI_PLACES=417, PETRI_TRANSITIONS=537} [2024-06-14 14:13:49,999 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 372 predicate places. [2024-06-14 14:13:49,999 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 537 transitions, 6471 flow [2024-06-14 14:13:49,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:49,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:49,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:50,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:13:50,000 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:50,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:50,000 INFO L85 PathProgramCache]: Analyzing trace with hash -872846050, now seen corresponding path program 5 times [2024-06-14 14:13:50,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:50,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278322209] [2024-06-14 14:13:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:50,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:50,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:50,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278322209] [2024-06-14 14:13:50,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278322209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:50,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:50,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:50,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926977737] [2024-06-14 14:13:50,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:50,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:50,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:50,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:50,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 537 transitions, 6471 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:50,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:50,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:50,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:51,462 INFO L124 PetriNetUnfolderBase]: 3084/5411 cut-off events. [2024-06-14 14:13:51,462 INFO L125 PetriNetUnfolderBase]: For 902085/902085 co-relation queries the response was YES. [2024-06-14 14:13:51,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40565 conditions, 5411 events. 3084/5411 cut-off events. For 902085/902085 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 38026 event pairs, 556 based on Foata normal form. 2/5408 useless extension candidates. Maximal degree in co-relation 40370. Up to 4615 conditions per place. [2024-06-14 14:13:51,537 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 481 selfloop transitions, 70 changer transitions 0/560 dead transitions. [2024-06-14 14:13:51,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 560 transitions, 7719 flow [2024-06-14 14:13:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 14:13:51,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2024-06-14 14:13:51,538 INFO L175 Difference]: Start difference. First operand has 417 places, 537 transitions, 6471 flow. Second operand 10 states and 238 transitions. [2024-06-14 14:13:51,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 560 transitions, 7719 flow [2024-06-14 14:13:56,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 560 transitions, 7409 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 14:13:56,405 INFO L231 Difference]: Finished difference. Result has 420 places, 539 transitions, 6406 flow [2024-06-14 14:13:56,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6161, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6406, PETRI_PLACES=420, PETRI_TRANSITIONS=539} [2024-06-14 14:13:56,405 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 375 predicate places. [2024-06-14 14:13:56,405 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 539 transitions, 6406 flow [2024-06-14 14:13:56,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:56,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:56,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:56,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:13:56,406 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:56,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:56,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1127788352, now seen corresponding path program 6 times [2024-06-14 14:13:56,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:56,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523575165] [2024-06-14 14:13:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:56,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:56,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:56,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523575165] [2024-06-14 14:13:56,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523575165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:56,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:56,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:56,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324859558] [2024-06-14 14:13:56,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:56,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:56,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:56,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:56,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:56,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 539 transitions, 6406 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:56,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:56,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:56,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:57,754 INFO L124 PetriNetUnfolderBase]: 3092/5423 cut-off events. [2024-06-14 14:13:57,754 INFO L125 PetriNetUnfolderBase]: For 916005/916005 co-relation queries the response was YES. [2024-06-14 14:13:57,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40741 conditions, 5423 events. 3092/5423 cut-off events. For 916005/916005 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 38121 event pairs, 554 based on Foata normal form. 2/5420 useless extension candidates. Maximal degree in co-relation 40545. Up to 4607 conditions per place. [2024-06-14 14:13:57,841 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 480 selfloop transitions, 75 changer transitions 0/564 dead transitions. [2024-06-14 14:13:57,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 564 transitions, 7670 flow [2024-06-14 14:13:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:13:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:13:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-14 14:13:57,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351239669421488 [2024-06-14 14:13:57,842 INFO L175 Difference]: Start difference. First operand has 420 places, 539 transitions, 6406 flow. Second operand 11 states and 259 transitions. [2024-06-14 14:13:57,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 564 transitions, 7670 flow [2024-06-14 14:14:01,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 564 transitions, 7441 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-14 14:14:01,803 INFO L231 Difference]: Finished difference. Result has 423 places, 541 transitions, 6436 flow [2024-06-14 14:14:01,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6177, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6436, PETRI_PLACES=423, PETRI_TRANSITIONS=541} [2024-06-14 14:14:01,804 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 378 predicate places. [2024-06-14 14:14:01,804 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 541 transitions, 6436 flow [2024-06-14 14:14:01,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:01,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:01,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:01,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:14:01,804 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:01,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash 317050370, now seen corresponding path program 6 times [2024-06-14 14:14:01,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:01,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639158543] [2024-06-14 14:14:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:01,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:02,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639158543] [2024-06-14 14:14:02,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639158543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:02,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:02,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:02,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137820044] [2024-06-14 14:14:02,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:02,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:02,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:02,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:02,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:02,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:02,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 541 transitions, 6436 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:02,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:02,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:02,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:03,117 INFO L124 PetriNetUnfolderBase]: 3105/5443 cut-off events. [2024-06-14 14:14:03,117 INFO L125 PetriNetUnfolderBase]: For 926433/926433 co-relation queries the response was YES. [2024-06-14 14:14:03,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41023 conditions, 5443 events. 3105/5443 cut-off events. For 926433/926433 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 38213 event pairs, 560 based on Foata normal form. 1/5437 useless extension candidates. Maximal degree in co-relation 40826. Up to 4500 conditions per place. [2024-06-14 14:14:03,208 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 409 selfloop transitions, 158 changer transitions 0/576 dead transitions. [2024-06-14 14:14:03,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 576 transitions, 8590 flow [2024-06-14 14:14:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-14 14:14:03,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-14 14:14:03,209 INFO L175 Difference]: Start difference. First operand has 423 places, 541 transitions, 6436 flow. Second operand 10 states and 251 transitions. [2024-06-14 14:14:03,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 576 transitions, 8590 flow [2024-06-14 14:14:08,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 576 transitions, 8373 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-14 14:14:08,887 INFO L231 Difference]: Finished difference. Result has 425 places, 547 transitions, 6616 flow [2024-06-14 14:14:08,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6616, PETRI_PLACES=425, PETRI_TRANSITIONS=547} [2024-06-14 14:14:08,887 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-14 14:14:08,887 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 547 transitions, 6616 flow [2024-06-14 14:14:08,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:08,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:08,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:08,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:14:08,888 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:08,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:08,888 INFO L85 PathProgramCache]: Analyzing trace with hash -857603970, now seen corresponding path program 7 times [2024-06-14 14:14:08,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:08,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10857894] [2024-06-14 14:14:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:08,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:09,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:09,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10857894] [2024-06-14 14:14:09,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10857894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:09,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:09,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:09,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818047069] [2024-06-14 14:14:09,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:09,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:09,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:09,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:09,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:09,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:09,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 547 transitions, 6616 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:09,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:09,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:09,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:10,212 INFO L124 PetriNetUnfolderBase]: 3110/5452 cut-off events. [2024-06-14 14:14:10,213 INFO L125 PetriNetUnfolderBase]: For 937185/937185 co-relation queries the response was YES. [2024-06-14 14:14:10,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41206 conditions, 5452 events. 3110/5452 cut-off events. For 937185/937185 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 38348 event pairs, 560 based on Foata normal form. 1/5446 useless extension candidates. Maximal degree in co-relation 41008. Up to 4506 conditions per place. [2024-06-14 14:14:10,300 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 411 selfloop transitions, 151 changer transitions 0/571 dead transitions. [2024-06-14 14:14:10,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 571 transitions, 8131 flow [2024-06-14 14:14:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-14 14:14:10,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-14 14:14:10,301 INFO L175 Difference]: Start difference. First operand has 425 places, 547 transitions, 6616 flow. Second operand 10 states and 246 transitions. [2024-06-14 14:14:10,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 571 transitions, 8131 flow [2024-06-14 14:14:15,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 571 transitions, 7842 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:14:15,936 INFO L231 Difference]: Finished difference. Result has 429 places, 550 transitions, 6682 flow [2024-06-14 14:14:15,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6682, PETRI_PLACES=429, PETRI_TRANSITIONS=550} [2024-06-14 14:14:15,937 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 384 predicate places. [2024-06-14 14:14:15,937 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 550 transitions, 6682 flow [2024-06-14 14:14:15,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:15,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:15,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:15,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:14:15,938 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:15,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash -872841090, now seen corresponding path program 8 times [2024-06-14 14:14:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:15,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756166074] [2024-06-14 14:14:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:15,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:16,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:16,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756166074] [2024-06-14 14:14:16,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756166074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:16,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:16,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:16,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628480396] [2024-06-14 14:14:16,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:16,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:16,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:16,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:16,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 550 transitions, 6682 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:16,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:16,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:16,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:17,343 INFO L124 PetriNetUnfolderBase]: 3123/5474 cut-off events. [2024-06-14 14:14:17,343 INFO L125 PetriNetUnfolderBase]: For 960855/960855 co-relation queries the response was YES. [2024-06-14 14:14:17,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41582 conditions, 5474 events. 3123/5474 cut-off events. For 960855/960855 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 38456 event pairs, 560 based on Foata normal form. 1/5468 useless extension candidates. Maximal degree in co-relation 41383. Up to 4521 conditions per place. [2024-06-14 14:14:17,433 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 412 selfloop transitions, 157 changer transitions 0/578 dead transitions. [2024-06-14 14:14:17,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 578 transitions, 8556 flow [2024-06-14 14:14:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-14 14:14:17,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-14 14:14:17,434 INFO L175 Difference]: Start difference. First operand has 429 places, 550 transitions, 6682 flow. Second operand 10 states and 247 transitions. [2024-06-14 14:14:17,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 578 transitions, 8556 flow [2024-06-14 14:14:23,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 578 transitions, 8295 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:14:23,873 INFO L231 Difference]: Finished difference. Result has 432 places, 556 transitions, 6833 flow [2024-06-14 14:14:23,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6427, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6833, PETRI_PLACES=432, PETRI_TRANSITIONS=556} [2024-06-14 14:14:23,874 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-14 14:14:23,874 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 556 transitions, 6833 flow [2024-06-14 14:14:23,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:23,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:23,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:23,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:14:23,874 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:23,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1245114494, now seen corresponding path program 9 times [2024-06-14 14:14:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:23,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801222819] [2024-06-14 14:14:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801222819] [2024-06-14 14:14:24,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801222819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:24,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:24,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:24,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055285431] [2024-06-14 14:14:24,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:24,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:24,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 556 transitions, 6833 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:24,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:24,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:24,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:25,205 INFO L124 PetriNetUnfolderBase]: 3128/5483 cut-off events. [2024-06-14 14:14:25,205 INFO L125 PetriNetUnfolderBase]: For 974192/974192 co-relation queries the response was YES. [2024-06-14 14:14:25,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41756 conditions, 5483 events. 3128/5483 cut-off events. For 974192/974192 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38575 event pairs, 560 based on Foata normal form. 1/5477 useless extension candidates. Maximal degree in co-relation 41556. Up to 4527 conditions per place. [2024-06-14 14:14:25,459 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 409 selfloop transitions, 165 changer transitions 0/583 dead transitions. [2024-06-14 14:14:25,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 583 transitions, 8678 flow [2024-06-14 14:14:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:14:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:14:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 284 transitions. [2024-06-14 14:14:25,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-06-14 14:14:25,460 INFO L175 Difference]: Start difference. First operand has 432 places, 556 transitions, 6833 flow. Second operand 12 states and 284 transitions. [2024-06-14 14:14:25,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 583 transitions, 8678 flow [2024-06-14 14:14:31,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 583 transitions, 8416 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:14:31,964 INFO L231 Difference]: Finished difference. Result has 438 places, 559 transitions, 6952 flow [2024-06-14 14:14:31,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6574, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6952, PETRI_PLACES=438, PETRI_TRANSITIONS=559} [2024-06-14 14:14:31,965 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 393 predicate places. [2024-06-14 14:14:31,965 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 559 transitions, 6952 flow [2024-06-14 14:14:31,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:31,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:31,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:31,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 14:14:31,966 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:31,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:31,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1253685374, now seen corresponding path program 10 times [2024-06-14 14:14:31,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:31,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146655862] [2024-06-14 14:14:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:31,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:32,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146655862] [2024-06-14 14:14:32,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146655862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:32,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:32,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:32,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014974109] [2024-06-14 14:14:32,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:32,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:32,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:32,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:32,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:32,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:32,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 559 transitions, 6952 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:32,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:32,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:32,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:33,315 INFO L124 PetriNetUnfolderBase]: 3125/5479 cut-off events. [2024-06-14 14:14:33,315 INFO L125 PetriNetUnfolderBase]: For 976346/976346 co-relation queries the response was YES. [2024-06-14 14:14:33,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41718 conditions, 5479 events. 3125/5479 cut-off events. For 976346/976346 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38619 event pairs, 560 based on Foata normal form. 1/5473 useless extension candidates. Maximal degree in co-relation 41517. Up to 4524 conditions per place. [2024-06-14 14:14:33,411 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 407 selfloop transitions, 165 changer transitions 0/581 dead transitions. [2024-06-14 14:14:33,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 581 transitions, 8448 flow [2024-06-14 14:14:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:14:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:14:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-14 14:14:33,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:14:33,412 INFO L175 Difference]: Start difference. First operand has 438 places, 559 transitions, 6952 flow. Second operand 11 states and 264 transitions. [2024-06-14 14:14:33,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 581 transitions, 8448 flow [2024-06-14 14:14:39,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 581 transitions, 8138 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-14 14:14:39,225 INFO L231 Difference]: Finished difference. Result has 440 places, 559 transitions, 6978 flow [2024-06-14 14:14:39,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6642, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6978, PETRI_PLACES=440, PETRI_TRANSITIONS=559} [2024-06-14 14:14:39,225 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-14 14:14:39,225 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 559 transitions, 6978 flow [2024-06-14 14:14:39,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:39,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:39,225 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, 1] [2024-06-14 14:14:39,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 14:14:39,226 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:39,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2001521984, now seen corresponding path program 1 times [2024-06-14 14:14:39,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:39,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283883302] [2024-06-14 14:14:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:39,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:39,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283883302] [2024-06-14 14:14:39,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283883302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:39,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:39,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:14:39,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233254420] [2024-06-14 14:14:39,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:39,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:14:39,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:14:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:14:39,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:39,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 559 transitions, 6978 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) [2024-06-14 14:14:39,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:39,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:39,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:40,533 INFO L124 PetriNetUnfolderBase]: 3133/5491 cut-off events. [2024-06-14 14:14:40,533 INFO L125 PetriNetUnfolderBase]: For 1001590/1001590 co-relation queries the response was YES. [2024-06-14 14:14:40,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41956 conditions, 5491 events. 3133/5491 cut-off events. For 1001590/1001590 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 38625 event pairs, 560 based on Foata normal form. 2/5486 useless extension candidates. Maximal degree in co-relation 41754. Up to 4705 conditions per place. [2024-06-14 14:14:40,626 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 495 selfloop transitions, 75 changer transitions 0/579 dead transitions. [2024-06-14 14:14:40,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 579 transitions, 8230 flow [2024-06-14 14:14:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:14:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:14:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:14:40,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-14 14:14:40,627 INFO L175 Difference]: Start difference. First operand has 440 places, 559 transitions, 6978 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:14:40,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 579 transitions, 8230 flow [2024-06-14 14:14:48,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 579 transitions, 7814 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 14:14:48,011 INFO L231 Difference]: Finished difference. Result has 436 places, 561 transitions, 6790 flow [2024-06-14 14:14:48,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6790, PETRI_PLACES=436, PETRI_TRANSITIONS=561} [2024-06-14 14:14:48,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-14 14:14:48,012 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 561 transitions, 6790 flow [2024-06-14 14:14:48,012 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) [2024-06-14 14:14:48,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:48,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:48,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 14:14:48,013 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:48,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1245123422, now seen corresponding path program 2 times [2024-06-14 14:14:48,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:48,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117122065] [2024-06-14 14:14:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:48,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:48,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:48,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117122065] [2024-06-14 14:14:48,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117122065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:48,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:48,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:48,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66540881] [2024-06-14 14:14:48,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:48,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:48,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:48,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:48,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:48,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 561 transitions, 6790 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:48,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:48,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:48,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:49,378 INFO L124 PetriNetUnfolderBase]: 3141/5507 cut-off events. [2024-06-14 14:14:49,378 INFO L125 PetriNetUnfolderBase]: For 1014195/1014195 co-relation queries the response was YES. [2024-06-14 14:14:49,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41975 conditions, 5507 events. 3141/5507 cut-off events. For 1014195/1014195 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 38844 event pairs, 562 based on Foata normal form. 2/5502 useless extension candidates. Maximal degree in co-relation 41772. Up to 4719 conditions per place. [2024-06-14 14:14:49,477 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 497 selfloop transitions, 73 changer transitions 0/579 dead transitions. [2024-06-14 14:14:49,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 579 transitions, 8040 flow [2024-06-14 14:14:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:14:49,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-14 14:14:49,478 INFO L175 Difference]: Start difference. First operand has 436 places, 561 transitions, 6790 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:14:49,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 579 transitions, 8040 flow [2024-06-14 14:14:56,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 579 transitions, 7830 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 14:14:56,457 INFO L231 Difference]: Finished difference. Result has 439 places, 563 transitions, 6807 flow [2024-06-14 14:14:56,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6580, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6807, PETRI_PLACES=439, PETRI_TRANSITIONS=563} [2024-06-14 14:14:56,457 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-14 14:14:56,457 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 563 transitions, 6807 flow [2024-06-14 14:14:56,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:56,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:56,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:56,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:14:56,458 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:56,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash 188158506, now seen corresponding path program 3 times [2024-06-14 14:14:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:56,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643679323] [2024-06-14 14:14:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:56,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:56,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:56,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643679323] [2024-06-14 14:14:56,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643679323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:56,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:56,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:56,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878045031] [2024-06-14 14:14:56,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:56,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:56,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:56,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:56,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:56,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 563 transitions, 6807 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:56,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:56,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:56,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:57,838 INFO L124 PetriNetUnfolderBase]: 3149/5519 cut-off events. [2024-06-14 14:14:57,838 INFO L125 PetriNetUnfolderBase]: For 1028289/1028289 co-relation queries the response was YES. [2024-06-14 14:14:57,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42184 conditions, 5519 events. 3149/5519 cut-off events. For 1028289/1028289 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 38884 event pairs, 560 based on Foata normal form. 2/5514 useless extension candidates. Maximal degree in co-relation 41980. Up to 4709 conditions per place. [2024-06-14 14:14:57,929 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 496 selfloop transitions, 78 changer transitions 0/583 dead transitions. [2024-06-14 14:14:57,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 583 transitions, 8073 flow [2024-06-14 14:14:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:14:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:14:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 14:14:57,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5429292929292929 [2024-06-14 14:14:57,930 INFO L175 Difference]: Start difference. First operand has 439 places, 563 transitions, 6807 flow. Second operand 9 states and 215 transitions. [2024-06-14 14:14:57,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 583 transitions, 8073 flow [2024-06-14 14:15:05,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 583 transitions, 7862 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 14:15:05,465 INFO L231 Difference]: Finished difference. Result has 442 places, 565 transitions, 6837 flow [2024-06-14 14:15:05,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6596, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6837, PETRI_PLACES=442, PETRI_TRANSITIONS=565} [2024-06-14 14:15:05,465 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 397 predicate places. [2024-06-14 14:15:05,466 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 565 transitions, 6837 flow [2024-06-14 14:15:05,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:05,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:05,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:05,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:15:05,466 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:05,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 34831584, now seen corresponding path program 11 times [2024-06-14 14:15:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716310029] [2024-06-14 14:15:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:05,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:05,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716310029] [2024-06-14 14:15:05,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716310029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:05,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:05,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:15:05,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009128459] [2024-06-14 14:15:05,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:05,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:15:05,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:05,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:15:05,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:15:05,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:05,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 565 transitions, 6837 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:05,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:05,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:05,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:06,883 INFO L124 PetriNetUnfolderBase]: 3154/5524 cut-off events. [2024-06-14 14:15:06,883 INFO L125 PetriNetUnfolderBase]: For 1029926/1029926 co-relation queries the response was YES. [2024-06-14 14:15:06,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42286 conditions, 5524 events. 3154/5524 cut-off events. For 1029926/1029926 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38927 event pairs, 568 based on Foata normal form. 1/5513 useless extension candidates. Maximal degree in co-relation 42081. Up to 4566 conditions per place. [2024-06-14 14:15:06,977 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 421 selfloop transitions, 171 changer transitions 0/601 dead transitions. [2024-06-14 14:15:06,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 601 transitions, 8761 flow [2024-06-14 14:15:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:15:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:15:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-14 14:15:06,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035353535353535 [2024-06-14 14:15:06,978 INFO L175 Difference]: Start difference. First operand has 442 places, 565 transitions, 6837 flow. Second operand 9 states and 239 transitions. [2024-06-14 14:15:06,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 601 transitions, 8761 flow [2024-06-14 14:15:14,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 601 transitions, 8536 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 14:15:14,610 INFO L231 Difference]: Finished difference. Result has 444 places, 568 transitions, 7002 flow [2024-06-14 14:15:14,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7002, PETRI_PLACES=444, PETRI_TRANSITIONS=568} [2024-06-14 14:15:14,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 399 predicate places. [2024-06-14 14:15:14,611 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 568 transitions, 7002 flow [2024-06-14 14:15:14,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:14,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:14,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:14,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:15:14,611 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:14,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2120155038, now seen corresponding path program 12 times [2024-06-14 14:15:14,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:14,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824133846] [2024-06-14 14:15:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:14,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:14,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:14,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824133846] [2024-06-14 14:15:14,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824133846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:14,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:14,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:15:14,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965273146] [2024-06-14 14:15:14,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:14,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:15:14,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:15:14,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:15:14,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:14,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 568 transitions, 7002 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:14,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:14,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:14,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:16,097 INFO L124 PetriNetUnfolderBase]: 3159/5533 cut-off events. [2024-06-14 14:15:16,097 INFO L125 PetriNetUnfolderBase]: For 1042405/1042405 co-relation queries the response was YES. [2024-06-14 14:15:16,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42534 conditions, 5533 events. 3159/5533 cut-off events. For 1042405/1042405 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 39068 event pairs, 568 based on Foata normal form. 1/5522 useless extension candidates. Maximal degree in co-relation 42328. Up to 4572 conditions per place. [2024-06-14 14:15:16,180 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 422 selfloop transitions, 175 changer transitions 0/606 dead transitions. [2024-06-14 14:15:16,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 606 transitions, 8950 flow [2024-06-14 14:15:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:15:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:15:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 279 transitions. [2024-06-14 14:15:16,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764462809917356 [2024-06-14 14:15:16,181 INFO L175 Difference]: Start difference. First operand has 444 places, 568 transitions, 7002 flow. Second operand 11 states and 279 transitions. [2024-06-14 14:15:16,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 606 transitions, 8950 flow [2024-06-14 14:15:24,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 606 transitions, 8586 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 14:15:24,755 INFO L231 Difference]: Finished difference. Result has 448 places, 571 transitions, 7042 flow [2024-06-14 14:15:24,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6644, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7042, PETRI_PLACES=448, PETRI_TRANSITIONS=571} [2024-06-14 14:15:24,756 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 403 predicate places. [2024-06-14 14:15:24,756 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 571 transitions, 7042 flow [2024-06-14 14:15:24,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:24,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:24,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:24,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:15:24,756 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:24,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash 41506752, now seen corresponding path program 4 times [2024-06-14 14:15:24,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:24,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666978954] [2024-06-14 14:15:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:24,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:24,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:24,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666978954] [2024-06-14 14:15:24,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666978954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:24,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:24,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:15:24,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566415581] [2024-06-14 14:15:24,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:24,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:15:24,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:15:24,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:15:25,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:25,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 571 transitions, 7042 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) [2024-06-14 14:15:25,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:25,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:25,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:26,288 INFO L124 PetriNetUnfolderBase]: 3167/5545 cut-off events. [2024-06-14 14:15:26,288 INFO L125 PetriNetUnfolderBase]: For 1068790/1068790 co-relation queries the response was YES. [2024-06-14 14:15:26,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42786 conditions, 5545 events. 3167/5545 cut-off events. For 1068790/1068790 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 39140 event pairs, 568 based on Foata normal form. 2/5535 useless extension candidates. Maximal degree in co-relation 42579. Up to 4757 conditions per place. [2024-06-14 14:15:26,371 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 509 selfloop transitions, 76 changer transitions 0/594 dead transitions. [2024-06-14 14:15:26,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 594 transitions, 8344 flow [2024-06-14 14:15:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:15:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:15:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:15:26,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 14:15:26,373 INFO L175 Difference]: Start difference. First operand has 448 places, 571 transitions, 7042 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:15:26,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 594 transitions, 8344 flow [2024-06-14 14:15:34,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 594 transitions, 7976 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 14:15:34,903 INFO L231 Difference]: Finished difference. Result has 446 places, 573 transitions, 6915 flow [2024-06-14 14:15:34,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6674, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6915, PETRI_PLACES=446, PETRI_TRANSITIONS=573} [2024-06-14 14:15:34,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 401 predicate places. [2024-06-14 14:15:34,903 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 573 transitions, 6915 flow [2024-06-14 14:15:34,903 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) [2024-06-14 14:15:34,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:34,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:34,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:15:34,903 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:34,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:34,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1406003584, now seen corresponding path program 7 times [2024-06-14 14:15:34,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:34,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947732279] [2024-06-14 14:15:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:34,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:35,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947732279] [2024-06-14 14:15:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947732279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:35,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:35,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:15:35,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709498949] [2024-06-14 14:15:35,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:35,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:15:35,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:15:35,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:15:35,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:35,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 573 transitions, 6915 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:35,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:35,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:35,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:36,339 INFO L124 PetriNetUnfolderBase]: 3175/5558 cut-off events. [2024-06-14 14:15:36,339 INFO L125 PetriNetUnfolderBase]: For 1084795/1084795 co-relation queries the response was YES. [2024-06-14 14:15:36,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42907 conditions, 5558 events. 3175/5558 cut-off events. For 1084795/1084795 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 39287 event pairs, 573 based on Foata normal form. 2/5555 useless extension candidates. Maximal degree in co-relation 42699. Up to 4747 conditions per place. [2024-06-14 14:15:36,429 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 511 selfloop transitions, 73 changer transitions 0/593 dead transitions. [2024-06-14 14:15:36,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 593 transitions, 8237 flow [2024-06-14 14:15:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:15:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:15:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-14 14:15:36,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-14 14:15:36,430 INFO L175 Difference]: Start difference. First operand has 446 places, 573 transitions, 6915 flow. Second operand 10 states and 236 transitions. [2024-06-14 14:15:36,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 593 transitions, 8237 flow [2024-06-14 14:15:44,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 593 transitions, 8012 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 14:15:44,747 INFO L231 Difference]: Finished difference. Result has 451 places, 575 transitions, 6957 flow [2024-06-14 14:15:44,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6690, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6957, PETRI_PLACES=451, PETRI_TRANSITIONS=575} [2024-06-14 14:15:44,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-14 14:15:44,748 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 575 transitions, 6957 flow [2024-06-14 14:15:44,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:44,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:44,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:44,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:15:44,748 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:44,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1015901240, now seen corresponding path program 8 times [2024-06-14 14:15:44,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:44,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479155798] [2024-06-14 14:15:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:44,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479155798] [2024-06-14 14:15:45,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479155798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:45,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:45,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:15:45,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75977082] [2024-06-14 14:15:45,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:45,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:15:45,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:45,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:15:45,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:15:45,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:45,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 575 transitions, 6957 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:45,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:45,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:45,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:46,229 INFO L124 PetriNetUnfolderBase]: 3170/5551 cut-off events. [2024-06-14 14:15:46,229 INFO L125 PetriNetUnfolderBase]: For 1072090/1072090 co-relation queries the response was YES. [2024-06-14 14:15:46,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42504 conditions, 5551 events. 3170/5551 cut-off events. For 1072090/1072090 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 39174 event pairs, 570 based on Foata normal form. 2/5548 useless extension candidates. Maximal degree in co-relation 42295. Up to 4720 conditions per place. [2024-06-14 14:15:46,321 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 510 selfloop transitions, 78 changer transitions 0/597 dead transitions. [2024-06-14 14:15:46,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 597 transitions, 8295 flow [2024-06-14 14:15:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:15:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:15:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-14 14:15:46,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53099173553719 [2024-06-14 14:15:46,322 INFO L175 Difference]: Start difference. First operand has 451 places, 575 transitions, 6957 flow. Second operand 11 states and 257 transitions. [2024-06-14 14:15:46,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 597 transitions, 8295 flow [2024-06-14 14:15:54,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 597 transitions, 8049 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-14 14:15:54,241 INFO L231 Difference]: Finished difference. Result has 455 places, 577 transitions, 6992 flow [2024-06-14 14:15:54,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6711, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6992, PETRI_PLACES=455, PETRI_TRANSITIONS=577} [2024-06-14 14:15:54,242 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 14:15:54,242 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 577 transitions, 6992 flow [2024-06-14 14:15:54,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:54,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:54,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:15:54,242 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:54,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1966434016, now seen corresponding path program 13 times [2024-06-14 14:15:54,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:54,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442701193] [2024-06-14 14:15:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:54,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:54,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442701193] [2024-06-14 14:15:54,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442701193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:54,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:54,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:15:54,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083855826] [2024-06-14 14:15:54,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:54,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:15:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:54,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:15:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:15:54,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:54,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 577 transitions, 6992 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:54,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:54,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:54,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:55,623 INFO L124 PetriNetUnfolderBase]: 3175/5563 cut-off events. [2024-06-14 14:15:55,623 INFO L125 PetriNetUnfolderBase]: For 1070157/1070157 co-relation queries the response was YES. [2024-06-14 14:15:55,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42523 conditions, 5563 events. 3175/5563 cut-off events. For 1070157/1070157 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 39292 event pairs, 569 based on Foata normal form. 1/5552 useless extension candidates. Maximal degree in co-relation 42313. Up to 4595 conditions per place. [2024-06-14 14:15:55,719 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 416 selfloop transitions, 183 changer transitions 0/608 dead transitions. [2024-06-14 14:15:55,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 608 transitions, 8936 flow [2024-06-14 14:15:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:15:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:15:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-14 14:15:55,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:15:55,720 INFO L175 Difference]: Start difference. First operand has 455 places, 577 transitions, 6992 flow. Second operand 10 states and 250 transitions. [2024-06-14 14:15:55,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 608 transitions, 8936 flow [2024-06-14 14:16:03,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 608 transitions, 8671 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-14 14:16:03,408 INFO L231 Difference]: Finished difference. Result has 456 places, 580 transitions, 7141 flow [2024-06-14 14:16:03,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6727, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7141, PETRI_PLACES=456, PETRI_TRANSITIONS=580} [2024-06-14 14:16:03,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 411 predicate places. [2024-06-14 14:16:03,408 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 580 transitions, 7141 flow [2024-06-14 14:16:03,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:03,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:03,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:03,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:16:03,409 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:03,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash -762432288, now seen corresponding path program 14 times [2024-06-14 14:16:03,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:03,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960134762] [2024-06-14 14:16:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:03,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:03,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:03,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960134762] [2024-06-14 14:16:03,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960134762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:03,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:03,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:03,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591236441] [2024-06-14 14:16:03,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:03,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:03,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:03,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:03,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:03,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:03,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 580 transitions, 7141 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:03,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:03,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:03,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:04,808 INFO L124 PetriNetUnfolderBase]: 3180/5565 cut-off events. [2024-06-14 14:16:04,808 INFO L125 PetriNetUnfolderBase]: For 1080673/1080673 co-relation queries the response was YES. [2024-06-14 14:16:04,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42684 conditions, 5565 events. 3180/5565 cut-off events. For 1080673/1080673 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 39325 event pairs, 582 based on Foata normal form. 1/5561 useless extension candidates. Maximal degree in co-relation 42473. Up to 4601 conditions per place. [2024-06-14 14:16:04,902 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 414 selfloop transitions, 180 changer transitions 0/603 dead transitions. [2024-06-14 14:16:04,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 603 transitions, 8751 flow [2024-06-14 14:16:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:16:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:16:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 286 transitions. [2024-06-14 14:16:04,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 14:16:04,903 INFO L175 Difference]: Start difference. First operand has 456 places, 580 transitions, 7141 flow. Second operand 12 states and 286 transitions. [2024-06-14 14:16:04,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 603 transitions, 8751 flow [2024-06-14 14:16:12,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 603 transitions, 8424 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 14:16:12,036 INFO L231 Difference]: Finished difference. Result has 461 places, 583 transitions, 7236 flow [2024-06-14 14:16:12,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6817, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7236, PETRI_PLACES=461, PETRI_TRANSITIONS=583} [2024-06-14 14:16:12,036 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 416 predicate places. [2024-06-14 14:16:12,037 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 583 transitions, 7236 flow [2024-06-14 14:16:12,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:12,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:12,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:12,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:16:12,037 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:12,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:12,037 INFO L85 PathProgramCache]: Analyzing trace with hash -754865082, now seen corresponding path program 15 times [2024-06-14 14:16:12,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:12,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355277330] [2024-06-14 14:16:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:12,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:12,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:12,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355277330] [2024-06-14 14:16:12,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355277330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:12,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:12,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:12,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584983448] [2024-06-14 14:16:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:12,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:12,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:12,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:12,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:12,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 583 transitions, 7236 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:12,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:12,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:12,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:13,512 INFO L124 PetriNetUnfolderBase]: 3193/5588 cut-off events. [2024-06-14 14:16:13,512 INFO L125 PetriNetUnfolderBase]: For 1107482/1107482 co-relation queries the response was YES. [2024-06-14 14:16:13,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43091 conditions, 5588 events. 3193/5588 cut-off events. For 1107482/1107482 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39490 event pairs, 581 based on Foata normal form. 1/5584 useless extension candidates. Maximal degree in co-relation 42879. Up to 4616 conditions per place. [2024-06-14 14:16:13,607 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 416 selfloop transitions, 186 changer transitions 0/611 dead transitions. [2024-06-14 14:16:13,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 611 transitions, 9244 flow [2024-06-14 14:16:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:16:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:16:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 306 transitions. [2024-06-14 14:16:13,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534965034965035 [2024-06-14 14:16:13,608 INFO L175 Difference]: Start difference. First operand has 461 places, 583 transitions, 7236 flow. Second operand 13 states and 306 transitions. [2024-06-14 14:16:13,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 611 transitions, 9244 flow [2024-06-14 14:16:20,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 611 transitions, 8936 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 14:16:20,885 INFO L231 Difference]: Finished difference. Result has 465 places, 589 transitions, 7416 flow [2024-06-14 14:16:20,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6934, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7416, PETRI_PLACES=465, PETRI_TRANSITIONS=589} [2024-06-14 14:16:20,885 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 420 predicate places. [2024-06-14 14:16:20,885 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 589 transitions, 7416 flow [2024-06-14 14:16:20,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:20,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:20,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:20,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:16:20,886 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:20,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:20,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1026371800, now seen corresponding path program 16 times [2024-06-14 14:16:20,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:20,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792936981] [2024-06-14 14:16:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:20,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:21,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:21,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792936981] [2024-06-14 14:16:21,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792936981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:21,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:21,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516154341] [2024-06-14 14:16:21,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:21,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:21,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:21,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:21,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:21,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:21,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 589 transitions, 7416 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:21,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:21,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:21,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:22,324 INFO L124 PetriNetUnfolderBase]: 3190/5583 cut-off events. [2024-06-14 14:16:22,324 INFO L125 PetriNetUnfolderBase]: For 1108405/1108405 co-relation queries the response was YES. [2024-06-14 14:16:22,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43020 conditions, 5583 events. 3190/5583 cut-off events. For 1108405/1108405 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39488 event pairs, 582 based on Foata normal form. 1/5579 useless extension candidates. Maximal degree in co-relation 42807. Up to 4613 conditions per place. [2024-06-14 14:16:22,415 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 414 selfloop transitions, 185 changer transitions 0/608 dead transitions. [2024-06-14 14:16:22,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 608 transitions, 9306 flow [2024-06-14 14:16:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:16:22,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:16:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:16:22,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 14:16:22,416 INFO L175 Difference]: Start difference. First operand has 465 places, 589 transitions, 7416 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:16:22,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 608 transitions, 9306 flow [2024-06-14 14:16:30,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 608 transitions, 8980 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-14 14:16:30,615 INFO L231 Difference]: Finished difference. Result has 466 places, 589 transitions, 7466 flow [2024-06-14 14:16:30,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7466, PETRI_PLACES=466, PETRI_TRANSITIONS=589} [2024-06-14 14:16:30,615 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 421 predicate places. [2024-06-14 14:16:30,615 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 589 transitions, 7466 flow [2024-06-14 14:16:30,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:30,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:30,616 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, 1] [2024-06-14 14:16:30,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:16:30,616 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:30,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1011134680, now seen corresponding path program 17 times [2024-06-14 14:16:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:30,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093097186] [2024-06-14 14:16:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:30,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:30,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093097186] [2024-06-14 14:16:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093097186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:30,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:30,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212069043] [2024-06-14 14:16:30,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:30,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:30,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:30,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:30,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 589 transitions, 7466 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:30,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:30,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:30,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:32,051 INFO L124 PetriNetUnfolderBase]: 3187/5579 cut-off events. [2024-06-14 14:16:32,051 INFO L125 PetriNetUnfolderBase]: For 1108944/1108944 co-relation queries the response was YES. [2024-06-14 14:16:32,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42920 conditions, 5579 events. 3187/5579 cut-off events. For 1108944/1108944 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39436 event pairs, 582 based on Foata normal form. 1/5575 useless extension candidates. Maximal degree in co-relation 42706. Up to 4610 conditions per place. [2024-06-14 14:16:32,143 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 413 selfloop transitions, 185 changer transitions 0/607 dead transitions. [2024-06-14 14:16:32,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 607 transitions, 9030 flow [2024-06-14 14:16:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:16:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:16:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 14:16:32,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-14 14:16:32,144 INFO L175 Difference]: Start difference. First operand has 466 places, 589 transitions, 7466 flow. Second operand 10 states and 244 transitions. [2024-06-14 14:16:32,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 607 transitions, 9030 flow [2024-06-14 14:16:40,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 607 transitions, 8696 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:16:40,094 INFO L231 Difference]: Finished difference. Result has 469 places, 589 transitions, 7508 flow [2024-06-14 14:16:40,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7508, PETRI_PLACES=469, PETRI_TRANSITIONS=589} [2024-06-14 14:16:40,095 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 424 predicate places. [2024-06-14 14:16:40,095 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 589 transitions, 7508 flow [2024-06-14 14:16:40,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:40,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:40,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:40,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:16:40,095 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:40,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:40,095 INFO L85 PathProgramCache]: Analyzing trace with hash -557958532, now seen corresponding path program 18 times [2024-06-14 14:16:40,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:40,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370160126] [2024-06-14 14:16:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:40,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:40,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:40,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370160126] [2024-06-14 14:16:40,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370160126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:40,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:40,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:40,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516498908] [2024-06-14 14:16:40,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:40,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:40,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:40,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:40,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 589 transitions, 7508 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:40,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:40,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:40,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:41,553 INFO L124 PetriNetUnfolderBase]: 3184/5579 cut-off events. [2024-06-14 14:16:41,553 INFO L125 PetriNetUnfolderBase]: For 1109251/1109251 co-relation queries the response was YES. [2024-06-14 14:16:41,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42750 conditions, 5579 events. 3184/5579 cut-off events. For 1109251/1109251 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39463 event pairs, 577 based on Foata normal form. 1/5575 useless extension candidates. Maximal degree in co-relation 42536. Up to 4607 conditions per place. [2024-06-14 14:16:41,651 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 408 selfloop transitions, 192 changer transitions 0/609 dead transitions. [2024-06-14 14:16:41,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 609 transitions, 9082 flow [2024-06-14 14:16:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:16:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:16:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 281 transitions. [2024-06-14 14:16:41,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321969696969697 [2024-06-14 14:16:41,652 INFO L175 Difference]: Start difference. First operand has 469 places, 589 transitions, 7508 flow. Second operand 12 states and 281 transitions. [2024-06-14 14:16:41,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 609 transitions, 9082 flow [2024-06-14 14:16:49,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 609 transitions, 8610 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 14:16:49,278 INFO L231 Difference]: Finished difference. Result has 471 places, 589 transitions, 7426 flow [2024-06-14 14:16:49,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7036, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7426, PETRI_PLACES=471, PETRI_TRANSITIONS=589} [2024-06-14 14:16:49,278 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 426 predicate places. [2024-06-14 14:16:49,278 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 589 transitions, 7426 flow [2024-06-14 14:16:49,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:49,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:49,278 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, 1] [2024-06-14 14:16:49,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:16:49,278 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:49,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1979273952, now seen corresponding path program 19 times [2024-06-14 14:16:49,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:49,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249999013] [2024-06-14 14:16:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:49,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:49,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:49,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249999013] [2024-06-14 14:16:49,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249999013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:49,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:49,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:49,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532421427] [2024-06-14 14:16:49,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:49,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:49,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:49,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:49,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:49,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:49,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 589 transitions, 7426 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:49,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:49,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:49,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:50,734 INFO L124 PetriNetUnfolderBase]: 3181/5575 cut-off events. [2024-06-14 14:16:50,734 INFO L125 PetriNetUnfolderBase]: For 1107397/1107397 co-relation queries the response was YES. [2024-06-14 14:16:50,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42598 conditions, 5575 events. 3181/5575 cut-off events. For 1107397/1107397 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39470 event pairs, 577 based on Foata normal form. 1/5571 useless extension candidates. Maximal degree in co-relation 42383. Up to 4604 conditions per place. [2024-06-14 14:16:50,826 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 412 selfloop transitions, 193 changer transitions 0/614 dead transitions. [2024-06-14 14:16:50,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 614 transitions, 9022 flow [2024-06-14 14:16:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-14 14:16:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-14 14:16:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 383 transitions. [2024-06-14 14:16:50,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120320855614974 [2024-06-14 14:16:50,827 INFO L175 Difference]: Start difference. First operand has 471 places, 589 transitions, 7426 flow. Second operand 17 states and 383 transitions. [2024-06-14 14:16:50,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 614 transitions, 9022 flow [2024-06-14 14:16:59,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 614 transitions, 8514 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-14 14:16:59,483 INFO L231 Difference]: Finished difference. Result has 476 places, 589 transitions, 7310 flow [2024-06-14 14:16:59,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6918, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7310, PETRI_PLACES=476, PETRI_TRANSITIONS=589} [2024-06-14 14:16:59,484 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 431 predicate places. [2024-06-14 14:16:59,484 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 589 transitions, 7310 flow [2024-06-14 14:16:59,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:59,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:59,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:59,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:16:59,484 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:59,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 399784062, now seen corresponding path program 20 times [2024-06-14 14:16:59,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:59,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472384960] [2024-06-14 14:16:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:59,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:59,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:59,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472384960] [2024-06-14 14:16:59,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472384960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:59,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:59,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:59,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426639405] [2024-06-14 14:16:59,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:59,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:59,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:59,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:59,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:59,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 589 transitions, 7310 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:59,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:59,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:59,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:00,883 INFO L124 PetriNetUnfolderBase]: 3178/5567 cut-off events. [2024-06-14 14:17:00,883 INFO L125 PetriNetUnfolderBase]: For 1105416/1105416 co-relation queries the response was YES. [2024-06-14 14:17:00,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42385 conditions, 5567 events. 3178/5567 cut-off events. For 1105416/1105416 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39429 event pairs, 582 based on Foata normal form. 1/5563 useless extension candidates. Maximal degree in co-relation 42169. Up to 4601 conditions per place. [2024-06-14 14:17:00,973 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 406 selfloop transitions, 192 changer transitions 0/607 dead transitions. [2024-06-14 14:17:00,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 607 transitions, 8548 flow [2024-06-14 14:17:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:17:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:17:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-14 14:17:00,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392561983471075 [2024-06-14 14:17:00,974 INFO L175 Difference]: Start difference. First operand has 476 places, 589 transitions, 7310 flow. Second operand 11 states and 261 transitions. [2024-06-14 14:17:00,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 607 transitions, 8548 flow [2024-06-14 14:17:10,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 607 transitions, 7921 flow, removed 6 selfloop flow, removed 19 redundant places. [2024-06-14 14:17:10,049 INFO L231 Difference]: Finished difference. Result has 468 places, 589 transitions, 7073 flow [2024-06-14 14:17:10,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6683, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7073, PETRI_PLACES=468, PETRI_TRANSITIONS=589} [2024-06-14 14:17:10,050 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 423 predicate places. [2024-06-14 14:17:10,050 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 589 transitions, 7073 flow [2024-06-14 14:17:10,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:10,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:10,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:10,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:17:10,050 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:10,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash -754856154, now seen corresponding path program 5 times [2024-06-14 14:17:10,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:10,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350223678] [2024-06-14 14:17:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:10,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:10,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:10,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350223678] [2024-06-14 14:17:10,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350223678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:10,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:10,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:17:10,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262514642] [2024-06-14 14:17:10,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:10,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:17:10,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:10,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:17:10,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:17:10,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:10,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 589 transitions, 7073 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:10,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:10,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:10,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:11,461 INFO L124 PetriNetUnfolderBase]: 3186/5584 cut-off events. [2024-06-14 14:17:11,462 INFO L125 PetriNetUnfolderBase]: For 1131841/1131841 co-relation queries the response was YES. [2024-06-14 14:17:11,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42511 conditions, 5584 events. 3186/5584 cut-off events. For 1131841/1131841 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 39582 event pairs, 583 based on Foata normal form. 2/5581 useless extension candidates. Maximal degree in co-relation 42294. Up to 4786 conditions per place. [2024-06-14 14:17:11,553 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 520 selfloop transitions, 75 changer transitions 0/604 dead transitions. [2024-06-14 14:17:11,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 604 transitions, 8381 flow [2024-06-14 14:17:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:17:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:17:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 14:17:11,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482954545454546 [2024-06-14 14:17:11,554 INFO L175 Difference]: Start difference. First operand has 468 places, 589 transitions, 7073 flow. Second operand 8 states and 193 transitions. [2024-06-14 14:17:11,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 604 transitions, 8381 flow [2024-06-14 14:17:20,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 604 transitions, 7997 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:17:20,075 INFO L231 Difference]: Finished difference. Result has 466 places, 591 transitions, 6936 flow [2024-06-14 14:17:20,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6936, PETRI_PLACES=466, PETRI_TRANSITIONS=591} [2024-06-14 14:17:20,075 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 421 predicate places. [2024-06-14 14:17:20,075 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 591 transitions, 6936 flow [2024-06-14 14:17:20,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:20,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:20,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:20,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:17:20,075 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:20,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1108734472, now seen corresponding path program 6 times [2024-06-14 14:17:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:20,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278926276] [2024-06-14 14:17:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:20,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:20,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278926276] [2024-06-14 14:17:20,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278926276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:20,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:20,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:17:20,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143203976] [2024-06-14 14:17:20,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:20,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:17:20,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:20,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:17:20,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:17:20,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:20,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 591 transitions, 6936 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:20,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:20,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:20,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:21,487 INFO L124 PetriNetUnfolderBase]: 3194/5596 cut-off events. [2024-06-14 14:17:21,487 INFO L125 PetriNetUnfolderBase]: For 1146972/1146972 co-relation queries the response was YES. [2024-06-14 14:17:21,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42568 conditions, 5596 events. 3194/5596 cut-off events. For 1146972/1146972 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 39598 event pairs, 581 based on Foata normal form. 2/5593 useless extension candidates. Maximal degree in co-relation 42350. Up to 4778 conditions per place. [2024-06-14 14:17:21,582 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 519 selfloop transitions, 80 changer transitions 0/608 dead transitions. [2024-06-14 14:17:21,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 608 transitions, 8260 flow [2024-06-14 14:17:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:17:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:17:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 14:17:21,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2024-06-14 14:17:21,583 INFO L175 Difference]: Start difference. First operand has 466 places, 591 transitions, 6936 flow. Second operand 9 states and 214 transitions. [2024-06-14 14:17:21,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 608 transitions, 8260 flow [2024-06-14 14:17:28,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 608 transitions, 8029 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 14:17:28,940 INFO L231 Difference]: Finished difference. Result has 469 places, 593 transitions, 6966 flow [2024-06-14 14:17:28,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6705, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6966, PETRI_PLACES=469, PETRI_TRANSITIONS=593} [2024-06-14 14:17:28,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 424 predicate places. [2024-06-14 14:17:28,940 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 593 transitions, 6966 flow [2024-06-14 14:17:28,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:28,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:28,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:28,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:17:28,941 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:28,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:28,941 INFO L85 PathProgramCache]: Analyzing trace with hash 991484194, now seen corresponding path program 7 times [2024-06-14 14:17:28,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:28,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183889477] [2024-06-14 14:17:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:28,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:29,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183889477] [2024-06-14 14:17:29,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183889477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:29,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:29,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:17:29,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528906757] [2024-06-14 14:17:29,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:29,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:17:29,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:17:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:17:29,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:29,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 593 transitions, 6966 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) [2024-06-14 14:17:29,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:29,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:29,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:30,278 INFO L124 PetriNetUnfolderBase]: 3202/5618 cut-off events. [2024-06-14 14:17:30,278 INFO L125 PetriNetUnfolderBase]: For 1161925/1161925 co-relation queries the response was YES. [2024-06-14 14:17:30,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42802 conditions, 5618 events. 3202/5618 cut-off events. For 1161925/1161925 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 39848 event pairs, 573 based on Foata normal form. 2/5608 useless extension candidates. Maximal degree in co-relation 42583. Up to 4810 conditions per place. [2024-06-14 14:17:30,371 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 527 selfloop transitions, 77 changer transitions 0/613 dead transitions. [2024-06-14 14:17:30,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 613 transitions, 8314 flow [2024-06-14 14:17:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:17:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:17:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:17:30,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-14 14:17:30,385 INFO L175 Difference]: Start difference. First operand has 469 places, 593 transitions, 6966 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:17:30,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 613 transitions, 8314 flow [2024-06-14 14:17:39,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 613 transitions, 8069 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 14:17:39,221 INFO L231 Difference]: Finished difference. Result has 469 places, 595 transitions, 6980 flow [2024-06-14 14:17:39,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6721, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6980, PETRI_PLACES=469, PETRI_TRANSITIONS=595} [2024-06-14 14:17:39,221 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 424 predicate places. [2024-06-14 14:17:39,221 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 595 transitions, 6980 flow [2024-06-14 14:17:39,221 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) [2024-06-14 14:17:39,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:39,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:39,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:17:39,221 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:39,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:39,222 INFO L85 PathProgramCache]: Analyzing trace with hash -301336640, now seen corresponding path program 8 times [2024-06-14 14:17:39,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:39,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442734124] [2024-06-14 14:17:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:39,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:39,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:39,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442734124] [2024-06-14 14:17:39,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442734124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:39,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:39,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:17:39,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775920423] [2024-06-14 14:17:39,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:39,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:17:39,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:17:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:17:39,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:39,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 595 transitions, 6980 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) [2024-06-14 14:17:39,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:39,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:39,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:40,622 INFO L124 PetriNetUnfolderBase]: 3210/5632 cut-off events. [2024-06-14 14:17:40,622 INFO L125 PetriNetUnfolderBase]: For 1176609/1176609 co-relation queries the response was YES. [2024-06-14 14:17:40,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42989 conditions, 5632 events. 3210/5632 cut-off events. For 1176609/1176609 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 39988 event pairs, 571 based on Foata normal form. 2/5622 useless extension candidates. Maximal degree in co-relation 42769. Up to 4794 conditions per place. [2024-06-14 14:17:40,719 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 525 selfloop transitions, 84 changer transitions 0/618 dead transitions. [2024-06-14 14:17:40,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 618 transitions, 8410 flow [2024-06-14 14:17:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:17:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:17:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:17:40,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 14:17:40,720 INFO L175 Difference]: Start difference. First operand has 469 places, 595 transitions, 6980 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:17:40,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 618 transitions, 8410 flow [2024-06-14 14:17:49,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 618 transitions, 8167 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 14:17:49,900 INFO L231 Difference]: Finished difference. Result has 472 places, 599 transitions, 7095 flow [2024-06-14 14:17:49,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6737, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7095, PETRI_PLACES=472, PETRI_TRANSITIONS=599} [2024-06-14 14:17:49,901 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 427 predicate places. [2024-06-14 14:17:49,901 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 599 transitions, 7095 flow [2024-06-14 14:17:49,901 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) [2024-06-14 14:17:49,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:49,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:49,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:17:49,902 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:49,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1020557734, now seen corresponding path program 9 times [2024-06-14 14:17:49,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:49,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634694075] [2024-06-14 14:17:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:49,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:50,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:50,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634694075] [2024-06-14 14:17:50,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634694075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:50,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:50,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:17:50,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341049507] [2024-06-14 14:17:50,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:50,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:17:50,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:50,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:17:50,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:17:50,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:50,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 599 transitions, 7095 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:50,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:50,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:50,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:51,345 INFO L124 PetriNetUnfolderBase]: 3231/5664 cut-off events. [2024-06-14 14:17:51,346 INFO L125 PetriNetUnfolderBase]: For 1223572/1223572 co-relation queries the response was YES. [2024-06-14 14:17:51,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43941 conditions, 5664 events. 3231/5664 cut-off events. For 1223572/1223572 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 40235 event pairs, 582 based on Foata normal form. 2/5661 useless extension candidates. Maximal degree in co-relation 43719. Up to 4822 conditions per place. [2024-06-14 14:17:51,441 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 527 selfloop transitions, 83 changer transitions 0/619 dead transitions. [2024-06-14 14:17:51,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 619 transitions, 8909 flow [2024-06-14 14:17:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:17:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:17:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:17:51,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-14 14:17:51,443 INFO L175 Difference]: Start difference. First operand has 472 places, 599 transitions, 7095 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:17:51,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 619 transitions, 8909 flow [2024-06-14 14:17:59,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 619 transitions, 8669 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-14 14:17:59,827 INFO L231 Difference]: Finished difference. Result has 478 places, 604 transitions, 7262 flow [2024-06-14 14:17:59,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6855, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7262, PETRI_PLACES=478, PETRI_TRANSITIONS=604} [2024-06-14 14:17:59,827 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 433 predicate places. [2024-06-14 14:17:59,827 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 604 transitions, 7262 flow [2024-06-14 14:17:59,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:59,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:59,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:59,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:17:59,827 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:59,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:59,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1246635350, now seen corresponding path program 10 times [2024-06-14 14:17:59,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:59,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153788741] [2024-06-14 14:17:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:59,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:00,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:00,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153788741] [2024-06-14 14:18:00,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153788741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:00,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:00,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:18:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321717099] [2024-06-14 14:18:00,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:00,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:18:00,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:00,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:18:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:18:00,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:00,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 604 transitions, 7262 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:00,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:00,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:00,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:01,295 INFO L124 PetriNetUnfolderBase]: 3239/5678 cut-off events. [2024-06-14 14:18:01,295 INFO L125 PetriNetUnfolderBase]: For 1237607/1237607 co-relation queries the response was YES. [2024-06-14 14:18:01,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44289 conditions, 5678 events. 3239/5678 cut-off events. For 1237607/1237607 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 40344 event pairs, 586 based on Foata normal form. 2/5675 useless extension candidates. Maximal degree in co-relation 44064. Up to 4865 conditions per place. [2024-06-14 14:18:01,555 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 533 selfloop transitions, 77 changer transitions 0/619 dead transitions. [2024-06-14 14:18:01,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 619 transitions, 8622 flow [2024-06-14 14:18:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:18:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:18:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 14:18:01,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:18:01,556 INFO L175 Difference]: Start difference. First operand has 478 places, 604 transitions, 7262 flow. Second operand 8 states and 192 transitions. [2024-06-14 14:18:01,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 619 transitions, 8622 flow [2024-06-14 14:18:10,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 619 transitions, 8362 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-14 14:18:10,568 INFO L231 Difference]: Finished difference. Result has 482 places, 606 transitions, 7275 flow [2024-06-14 14:18:10,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7034, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7275, PETRI_PLACES=482, PETRI_TRANSITIONS=606} [2024-06-14 14:18:10,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 437 predicate places. [2024-06-14 14:18:10,568 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 606 transitions, 7275 flow [2024-06-14 14:18:10,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:10,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:10,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:10,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:18:10,568 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:10,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:10,569 INFO L85 PathProgramCache]: Analyzing trace with hash 617962308, now seen corresponding path program 11 times [2024-06-14 14:18:10,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:10,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764500222] [2024-06-14 14:18:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:10,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:10,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:10,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764500222] [2024-06-14 14:18:10,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764500222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:10,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:10,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:18:10,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577525943] [2024-06-14 14:18:10,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:10,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:18:10,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:10,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:18:10,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:18:10,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:10,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 606 transitions, 7275 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:10,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:10,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:10,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:12,181 INFO L124 PetriNetUnfolderBase]: 3247/5694 cut-off events. [2024-06-14 14:18:12,182 INFO L125 PetriNetUnfolderBase]: For 1248395/1248395 co-relation queries the response was YES. [2024-06-14 14:18:12,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44395 conditions, 5694 events. 3247/5694 cut-off events. For 1248395/1248395 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 40523 event pairs, 586 based on Foata normal form. 2/5691 useless extension candidates. Maximal degree in co-relation 44168. Up to 4848 conditions per place. [2024-06-14 14:18:12,268 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 532 selfloop transitions, 85 changer transitions 0/626 dead transitions. [2024-06-14 14:18:12,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 626 transitions, 9046 flow [2024-06-14 14:18:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:18:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:18:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-14 14:18:12,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-06-14 14:18:12,268 INFO L175 Difference]: Start difference. First operand has 482 places, 606 transitions, 7275 flow. Second operand 10 states and 235 transitions. [2024-06-14 14:18:12,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 626 transitions, 9046 flow [2024-06-14 14:18:20,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 626 transitions, 8827 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 14:18:20,840 INFO L231 Difference]: Finished difference. Result has 487 places, 609 transitions, 7400 flow [2024-06-14 14:18:20,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7056, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7400, PETRI_PLACES=487, PETRI_TRANSITIONS=609} [2024-06-14 14:18:20,840 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 442 predicate places. [2024-06-14 14:18:20,840 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 609 transitions, 7400 flow [2024-06-14 14:18:20,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:20,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:20,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:20,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 14:18:20,841 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:20,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:20,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1769914100, now seen corresponding path program 12 times [2024-06-14 14:18:20,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:20,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577259166] [2024-06-14 14:18:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:20,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:21,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:21,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577259166] [2024-06-14 14:18:21,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577259166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:21,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:21,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:18:21,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037403641] [2024-06-14 14:18:21,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:21,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:18:21,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:21,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:18:21,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:18:21,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:21,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 609 transitions, 7400 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:21,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:21,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:21,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:22,374 INFO L124 PetriNetUnfolderBase]: 3242/5687 cut-off events. [2024-06-14 14:18:22,375 INFO L125 PetriNetUnfolderBase]: For 1232272/1232272 co-relation queries the response was YES. [2024-06-14 14:18:22,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44044 conditions, 5687 events. 3242/5687 cut-off events. For 1232272/1232272 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 40498 event pairs, 587 based on Foata normal form. 2/5684 useless extension candidates. Maximal degree in co-relation 43815. Up to 4870 conditions per place. [2024-06-14 14:18:22,463 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 537 selfloop transitions, 78 changer transitions 0/624 dead transitions. [2024-06-14 14:18:22,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 624 transitions, 8664 flow [2024-06-14 14:18:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:18:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:18:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-14 14:18:22,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295454545454545 [2024-06-14 14:18:22,464 INFO L175 Difference]: Start difference. First operand has 487 places, 609 transitions, 7400 flow. Second operand 10 states and 233 transitions. [2024-06-14 14:18:22,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 624 transitions, 8664 flow [2024-06-14 14:18:31,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 624 transitions, 8301 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-14 14:18:31,967 INFO L231 Difference]: Finished difference. Result has 490 places, 609 transitions, 7198 flow [2024-06-14 14:18:31,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7037, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7198, PETRI_PLACES=490, PETRI_TRANSITIONS=609} [2024-06-14 14:18:31,968 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 445 predicate places. [2024-06-14 14:18:31,968 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 609 transitions, 7198 flow [2024-06-14 14:18:31,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:31,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:31,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:31,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 14:18:31,968 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:31,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:31,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1885403998, now seen corresponding path program 13 times [2024-06-14 14:18:31,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:31,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095100731] [2024-06-14 14:18:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:31,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:32,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:32,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095100731] [2024-06-14 14:18:32,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095100731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:32,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:32,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:18:32,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324752723] [2024-06-14 14:18:32,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:32,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:18:32,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:18:32,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:18:32,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:32,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 609 transitions, 7198 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:32,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:32,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:32,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:33,544 INFO L124 PetriNetUnfolderBase]: 3250/5705 cut-off events. [2024-06-14 14:18:33,545 INFO L125 PetriNetUnfolderBase]: For 1243539/1243539 co-relation queries the response was YES. [2024-06-14 14:18:33,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43944 conditions, 5705 events. 3250/5705 cut-off events. For 1243539/1243539 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 40648 event pairs, 566 based on Foata normal form. 2/5702 useless extension candidates. Maximal degree in co-relation 43714. Up to 4733 conditions per place. [2024-06-14 14:18:33,635 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 514 selfloop transitions, 109 changer transitions 0/632 dead transitions. [2024-06-14 14:18:33,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 632 transitions, 9126 flow [2024-06-14 14:18:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:18:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:18:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 14:18:33,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:18:33,636 INFO L175 Difference]: Start difference. First operand has 490 places, 609 transitions, 7198 flow. Second operand 9 states and 216 transitions. [2024-06-14 14:18:33,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 632 transitions, 9126 flow [2024-06-14 14:18:43,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 632 transitions, 8959 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:18:43,190 INFO L231 Difference]: Finished difference. Result has 491 places, 615 transitions, 7590 flow [2024-06-14 14:18:43,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7590, PETRI_PLACES=491, PETRI_TRANSITIONS=615} [2024-06-14 14:18:43,190 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 446 predicate places. [2024-06-14 14:18:43,190 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 615 transitions, 7590 flow [2024-06-14 14:18:43,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:43,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:43,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:43,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 14:18:43,191 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:43,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1878737758, now seen corresponding path program 14 times [2024-06-14 14:18:43,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:43,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507198274] [2024-06-14 14:18:43,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:43,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:43,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:43,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507198274] [2024-06-14 14:18:43,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507198274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:43,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:43,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:18:43,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108001840] [2024-06-14 14:18:43,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:43,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:18:43,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:43,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:18:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:18:43,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:43,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 615 transitions, 7590 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:43,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:43,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:43,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:44,726 INFO L124 PetriNetUnfolderBase]: 3245/5698 cut-off events. [2024-06-14 14:18:44,726 INFO L125 PetriNetUnfolderBase]: For 1227987/1227987 co-relation queries the response was YES. [2024-06-14 14:18:44,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43869 conditions, 5698 events. 3245/5698 cut-off events. For 1227987/1227987 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 40643 event pairs, 564 based on Foata normal form. 2/5695 useless extension candidates. Maximal degree in co-relation 43637. Up to 4729 conditions per place. [2024-06-14 14:18:44,818 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 511 selfloop transitions, 111 changer transitions 0/631 dead transitions. [2024-06-14 14:18:44,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 631 transitions, 8870 flow [2024-06-14 14:18:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:18:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:18:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 14:18:44,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5429292929292929 [2024-06-14 14:18:44,819 INFO L175 Difference]: Start difference. First operand has 491 places, 615 transitions, 7590 flow. Second operand 9 states and 215 transitions. [2024-06-14 14:18:44,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 631 transitions, 8870 flow [2024-06-14 14:18:53,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 631 transitions, 8522 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-06-14 14:18:53,883 INFO L231 Difference]: Finished difference. Result has 496 places, 615 transitions, 7469 flow [2024-06-14 14:18:53,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7242, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7469, PETRI_PLACES=496, PETRI_TRANSITIONS=615} [2024-06-14 14:18:53,884 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 451 predicate places. [2024-06-14 14:18:53,884 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 615 transitions, 7469 flow [2024-06-14 14:18:53,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:53,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:53,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:53,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 14:18:53,885 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:53,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:53,885 INFO L85 PathProgramCache]: Analyzing trace with hash 306855034, now seen corresponding path program 1 times [2024-06-14 14:18:53,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:53,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384418302] [2024-06-14 14:18:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:53,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:54,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384418302] [2024-06-14 14:18:54,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384418302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:54,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:54,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:18:54,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707478250] [2024-06-14 14:18:54,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:54,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:18:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:18:54,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:18:54,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:54,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 615 transitions, 7469 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:54,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:54,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:54,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:55,604 INFO L124 PetriNetUnfolderBase]: 3393/5956 cut-off events. [2024-06-14 14:18:55,604 INFO L125 PetriNetUnfolderBase]: For 1656006/1656006 co-relation queries the response was YES. [2024-06-14 14:18:55,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48927 conditions, 5956 events. 3393/5956 cut-off events. For 1656006/1656006 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 42617 event pairs, 531 based on Foata normal form. 12/5967 useless extension candidates. Maximal degree in co-relation 48693. Up to 4814 conditions per place. [2024-06-14 14:18:55,708 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 589 selfloop transitions, 55 changer transitions 0/653 dead transitions. [2024-06-14 14:18:55,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 653 transitions, 9441 flow [2024-06-14 14:18:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:18:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:18:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 14:18:55,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 14:18:55,709 INFO L175 Difference]: Start difference. First operand has 496 places, 615 transitions, 7469 flow. Second operand 8 states and 207 transitions. [2024-06-14 14:18:55,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 653 transitions, 9441 flow [2024-06-14 14:19:04,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 653 transitions, 9068 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 14:19:04,324 INFO L231 Difference]: Finished difference. Result has 496 places, 622 transitions, 7448 flow [2024-06-14 14:19:04,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7448, PETRI_PLACES=496, PETRI_TRANSITIONS=622} [2024-06-14 14:19:04,324 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 451 predicate places. [2024-06-14 14:19:04,324 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 622 transitions, 7448 flow [2024-06-14 14:19:04,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:04,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:04,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:04,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 14:19:04,324 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:04,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:04,325 INFO L85 PathProgramCache]: Analyzing trace with hash 75068700, now seen corresponding path program 2 times [2024-06-14 14:19:04,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:04,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408120419] [2024-06-14 14:19:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:04,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:04,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:04,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408120419] [2024-06-14 14:19:04,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408120419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:04,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:04,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:19:04,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331980025] [2024-06-14 14:19:04,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:04,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:19:04,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:04,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:19:04,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:19:04,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:04,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 622 transitions, 7448 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:04,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:04,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:04,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:06,082 INFO L124 PetriNetUnfolderBase]: 3479/6092 cut-off events. [2024-06-14 14:19:06,082 INFO L125 PetriNetUnfolderBase]: For 1818419/1818419 co-relation queries the response was YES. [2024-06-14 14:19:06,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51789 conditions, 6092 events. 3479/6092 cut-off events. For 1818419/1818419 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 43630 event pairs, 606 based on Foata normal form. 12/6103 useless extension candidates. Maximal degree in co-relation 51555. Up to 5125 conditions per place. [2024-06-14 14:19:06,190 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 592 selfloop transitions, 51 changer transitions 0/652 dead transitions. [2024-06-14 14:19:06,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 652 transitions, 9382 flow [2024-06-14 14:19:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:19:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:19:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 14:19:06,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 14:19:06,191 INFO L175 Difference]: Start difference. First operand has 496 places, 622 transitions, 7448 flow. Second operand 8 states and 204 transitions. [2024-06-14 14:19:06,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 652 transitions, 9382 flow [2024-06-14 14:19:14,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 652 transitions, 9228 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 14:19:15,000 INFO L231 Difference]: Finished difference. Result has 500 places, 626 transitions, 7611 flow [2024-06-14 14:19:15,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7306, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7611, PETRI_PLACES=500, PETRI_TRANSITIONS=626} [2024-06-14 14:19:15,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-14 14:19:15,000 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 626 transitions, 7611 flow [2024-06-14 14:19:15,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:15,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:15,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:15,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 14:19:15,001 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:15,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:15,001 INFO L85 PathProgramCache]: Analyzing trace with hash -248675554, now seen corresponding path program 3 times [2024-06-14 14:19:15,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:15,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102775020] [2024-06-14 14:19:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:15,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:15,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102775020] [2024-06-14 14:19:15,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102775020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:15,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:15,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:19:15,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002300228] [2024-06-14 14:19:15,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:15,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:19:15,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:19:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:19:15,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:15,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 626 transitions, 7611 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:15,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:15,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:15,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:16,660 INFO L124 PetriNetUnfolderBase]: 3443/6040 cut-off events. [2024-06-14 14:19:16,660 INFO L125 PetriNetUnfolderBase]: For 1635288/1635288 co-relation queries the response was YES. [2024-06-14 14:19:16,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48049 conditions, 6040 events. 3443/6040 cut-off events. For 1635288/1635288 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 43265 event pairs, 602 based on Foata normal form. 16/6055 useless extension candidates. Maximal degree in co-relation 47813. Up to 5169 conditions per place. [2024-06-14 14:19:16,770 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 591 selfloop transitions, 48 changer transitions 0/648 dead transitions. [2024-06-14 14:19:16,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 648 transitions, 8959 flow [2024-06-14 14:19:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:19:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:19:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:19:16,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-14 14:19:16,771 INFO L175 Difference]: Start difference. First operand has 500 places, 626 transitions, 7611 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:19:16,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 648 transitions, 8959 flow [2024-06-14 14:19:26,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 648 transitions, 8749 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-14 14:19:26,654 INFO L231 Difference]: Finished difference. Result has 504 places, 626 transitions, 7507 flow [2024-06-14 14:19:26,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7401, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7507, PETRI_PLACES=504, PETRI_TRANSITIONS=626} [2024-06-14 14:19:26,655 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 459 predicate places. [2024-06-14 14:19:26,655 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 626 transitions, 7507 flow [2024-06-14 14:19:26,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:26,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:26,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:26,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 14:19:26,655 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:26,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash -857593058, now seen corresponding path program 4 times [2024-06-14 14:19:26,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:26,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112937062] [2024-06-14 14:19:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:26,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:26,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112937062] [2024-06-14 14:19:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112937062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:26,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:26,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:19:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872112622] [2024-06-14 14:19:26,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:26,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:19:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:19:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:19:26,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:26,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 626 transitions, 7507 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:26,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:26,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:26,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:28,327 INFO L124 PetriNetUnfolderBase]: 3499/6125 cut-off events. [2024-06-14 14:19:28,327 INFO L125 PetriNetUnfolderBase]: For 1649203/1649203 co-relation queries the response was YES. [2024-06-14 14:19:28,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48290 conditions, 6125 events. 3499/6125 cut-off events. For 1649203/1649203 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 43930 event pairs, 628 based on Foata normal form. 16/6134 useless extension candidates. Maximal degree in co-relation 48052. Up to 5036 conditions per place. [2024-06-14 14:19:28,436 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 463 selfloop transitions, 180 changer transitions 0/652 dead transitions. [2024-06-14 14:19:28,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 652 transitions, 8971 flow [2024-06-14 14:19:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:19:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:19:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-14 14:19:28,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-06-14 14:19:28,436 INFO L175 Difference]: Start difference. First operand has 504 places, 626 transitions, 7507 flow. Second operand 10 states and 248 transitions. [2024-06-14 14:19:28,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 652 transitions, 8971 flow [2024-06-14 14:19:38,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 652 transitions, 8867 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:19:38,312 INFO L231 Difference]: Finished difference. Result has 507 places, 628 transitions, 7877 flow [2024-06-14 14:19:38,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7403, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7877, PETRI_PLACES=507, PETRI_TRANSITIONS=628} [2024-06-14 14:19:38,312 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 462 predicate places. [2024-06-14 14:19:38,312 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 628 transitions, 7877 flow [2024-06-14 14:19:38,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:38,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:38,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:38,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 14:19:38,313 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:38,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2141369990, now seen corresponding path program 5 times [2024-06-14 14:19:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:38,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743042019] [2024-06-14 14:19:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:38,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:38,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743042019] [2024-06-14 14:19:38,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743042019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:38,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:38,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:19:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855308768] [2024-06-14 14:19:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:38,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:19:38,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:19:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:19:38,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:38,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 628 transitions, 7877 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:38,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:38,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:38,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:40,075 INFO L124 PetriNetUnfolderBase]: 3631/6335 cut-off events. [2024-06-14 14:19:40,076 INFO L125 PetriNetUnfolderBase]: For 1883689/1883689 co-relation queries the response was YES. [2024-06-14 14:19:40,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54066 conditions, 6335 events. 3631/6335 cut-off events. For 1883689/1883689 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45570 event pairs, 650 based on Foata normal form. 12/6340 useless extension candidates. Maximal degree in co-relation 53827. Up to 5080 conditions per place. [2024-06-14 14:19:40,195 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 465 selfloop transitions, 186 changer transitions 0/660 dead transitions. [2024-06-14 14:19:40,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 660 transitions, 9847 flow [2024-06-14 14:19:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:19:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:19:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-14 14:19:40,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-14 14:19:40,196 INFO L175 Difference]: Start difference. First operand has 507 places, 628 transitions, 7877 flow. Second operand 10 states and 251 transitions. [2024-06-14 14:19:40,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 660 transitions, 9847 flow [2024-06-14 14:19:50,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 660 transitions, 9399 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-14 14:19:50,061 INFO L231 Difference]: Finished difference. Result has 509 places, 632 transitions, 8026 flow [2024-06-14 14:19:50,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7429, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8026, PETRI_PLACES=509, PETRI_TRANSITIONS=632} [2024-06-14 14:19:50,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 464 predicate places. [2024-06-14 14:19:50,061 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 632 transitions, 8026 flow [2024-06-14 14:19:50,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:50,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:50,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:50,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 14:19:50,061 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:50,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:50,062 INFO L85 PathProgramCache]: Analyzing trace with hash -25319046, now seen corresponding path program 6 times [2024-06-14 14:19:50,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:50,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014120495] [2024-06-14 14:19:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:50,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:50,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:50,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014120495] [2024-06-14 14:19:50,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014120495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:50,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:50,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:19:50,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198751887] [2024-06-14 14:19:50,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:50,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:19:50,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:50,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:19:50,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:19:50,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:50,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 632 transitions, 8026 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:50,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:50,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:50,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:51,836 INFO L124 PetriNetUnfolderBase]: 3595/6285 cut-off events. [2024-06-14 14:19:51,836 INFO L125 PetriNetUnfolderBase]: For 1695210/1695210 co-relation queries the response was YES. [2024-06-14 14:19:51,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50112 conditions, 6285 events. 3595/6285 cut-off events. For 1695210/1695210 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45218 event pairs, 648 based on Foata normal form. 16/6294 useless extension candidates. Maximal degree in co-relation 49872. Up to 5188 conditions per place. [2024-06-14 14:19:51,958 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 463 selfloop transitions, 185 changer transitions 0/657 dead transitions. [2024-06-14 14:19:51,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 657 transitions, 9398 flow [2024-06-14 14:19:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:19:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:19:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-14 14:19:51,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495867768595041 [2024-06-14 14:19:51,965 INFO L175 Difference]: Start difference. First operand has 509 places, 632 transitions, 8026 flow. Second operand 11 states and 266 transitions. [2024-06-14 14:19:51,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 657 transitions, 9398 flow [2024-06-14 14:20:01,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 657 transitions, 8854 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-14 14:20:01,863 INFO L231 Difference]: Finished difference. Result has 513 places, 632 transitions, 7858 flow [2024-06-14 14:20:01,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7482, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7858, PETRI_PLACES=513, PETRI_TRANSITIONS=632} [2024-06-14 14:20:01,863 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 468 predicate places. [2024-06-14 14:20:01,863 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 632 transitions, 7858 flow [2024-06-14 14:20:01,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:01,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:01,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:01,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 14:20:01,864 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:01,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash -16741222, now seen corresponding path program 1 times [2024-06-14 14:20:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:01,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544494703] [2024-06-14 14:20:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:02,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:02,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544494703] [2024-06-14 14:20:02,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544494703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:02,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:02,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:20:02,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091142110] [2024-06-14 14:20:02,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:02,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:20:02,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:02,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:20:02,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:20:02,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:02,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 632 transitions, 7858 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:02,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:02,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:02,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:03,865 INFO L124 PetriNetUnfolderBase]: 3681/6421 cut-off events. [2024-06-14 14:20:03,865 INFO L125 PetriNetUnfolderBase]: For 1777239/1777239 co-relation queries the response was YES. [2024-06-14 14:20:03,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52182 conditions, 6421 events. 3681/6421 cut-off events. For 1777239/1777239 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 46242 event pairs, 656 based on Foata normal form. 12/6426 useless extension candidates. Maximal degree in co-relation 51941. Up to 5070 conditions per place. [2024-06-14 14:20:03,980 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 458 selfloop transitions, 197 changer transitions 0/664 dead transitions. [2024-06-14 14:20:03,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 664 transitions, 9804 flow [2024-06-14 14:20:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:20:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:20:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-14 14:20:03,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5557851239669421 [2024-06-14 14:20:03,981 INFO L175 Difference]: Start difference. First operand has 513 places, 632 transitions, 7858 flow. Second operand 11 states and 269 transitions. [2024-06-14 14:20:03,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 664 transitions, 9804 flow [2024-06-14 14:20:15,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 664 transitions, 9418 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:20:15,192 INFO L231 Difference]: Finished difference. Result has 514 places, 635 transitions, 8052 flow [2024-06-14 14:20:15,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7472, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8052, PETRI_PLACES=514, PETRI_TRANSITIONS=635} [2024-06-14 14:20:15,193 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 469 predicate places. [2024-06-14 14:20:15,193 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 635 transitions, 8052 flow [2024-06-14 14:20:15,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:15,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:15,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:15,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 14:20:15,193 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:15,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash -762421376, now seen corresponding path program 7 times [2024-06-14 14:20:15,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:15,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230862668] [2024-06-14 14:20:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:15,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230862668] [2024-06-14 14:20:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230862668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:15,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:15,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:20:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218875390] [2024-06-14 14:20:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:20:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:20:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:20:15,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:15,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 635 transitions, 8052 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:15,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:15,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:15,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:17,022 INFO L124 PetriNetUnfolderBase]: 3737/6508 cut-off events. [2024-06-14 14:20:17,022 INFO L125 PetriNetUnfolderBase]: For 1877702/1877702 co-relation queries the response was YES. [2024-06-14 14:20:17,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53533 conditions, 6508 events. 3737/6508 cut-off events. For 1877702/1877702 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 47081 event pairs, 701 based on Foata normal form. 16/6519 useless extension candidates. Maximal degree in co-relation 53291. Up to 5410 conditions per place. [2024-06-14 14:20:17,145 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 463 selfloop transitions, 188 changer transitions 0/660 dead transitions. [2024-06-14 14:20:17,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 660 transitions, 9538 flow [2024-06-14 14:20:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:20:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:20:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 288 transitions. [2024-06-14 14:20:17,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:20:17,146 INFO L175 Difference]: Start difference. First operand has 514 places, 635 transitions, 8052 flow. Second operand 12 states and 288 transitions. [2024-06-14 14:20:17,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 660 transitions, 9538 flow [2024-06-14 14:20:29,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 660 transitions, 9200 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 14:20:29,163 INFO L231 Difference]: Finished difference. Result has 519 places, 637 transitions, 8214 flow [2024-06-14 14:20:29,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7714, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8214, PETRI_PLACES=519, PETRI_TRANSITIONS=637} [2024-06-14 14:20:29,164 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 474 predicate places. [2024-06-14 14:20:29,164 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 637 transitions, 8214 flow [2024-06-14 14:20:29,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:29,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:29,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:29,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 14:20:29,165 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:29,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1474436322, now seen corresponding path program 8 times [2024-06-14 14:20:29,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:29,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271557050] [2024-06-14 14:20:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:29,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:29,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:29,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271557050] [2024-06-14 14:20:29,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271557050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:29,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:29,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:20:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510300807] [2024-06-14 14:20:29,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:29,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:20:29,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:20:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:20:29,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:29,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 637 transitions, 8214 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:29,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:29,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:29,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:31,440 INFO L124 PetriNetUnfolderBase]: 3793/6600 cut-off events. [2024-06-14 14:20:31,440 INFO L125 PetriNetUnfolderBase]: For 1901797/1901797 co-relation queries the response was YES. [2024-06-14 14:20:31,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54541 conditions, 6600 events. 3793/6600 cut-off events. For 1901797/1901797 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 47807 event pairs, 711 based on Foata normal form. 16/6611 useless extension candidates. Maximal degree in co-relation 54297. Up to 5498 conditions per place. [2024-06-14 14:20:31,553 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 464 selfloop transitions, 187 changer transitions 0/660 dead transitions. [2024-06-14 14:20:31,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 660 transitions, 9700 flow [2024-06-14 14:20:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:20:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:20:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-14 14:20:31,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-14 14:20:31,554 INFO L175 Difference]: Start difference. First operand has 519 places, 637 transitions, 8214 flow. Second operand 10 states and 246 transitions. [2024-06-14 14:20:31,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 660 transitions, 9700 flow [2024-06-14 14:20:44,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 660 transitions, 9226 flow, removed 51 selfloop flow, removed 10 redundant places. [2024-06-14 14:20:44,658 INFO L231 Difference]: Finished difference. Result has 519 places, 639 transitions, 8242 flow [2024-06-14 14:20:44,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7740, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8242, PETRI_PLACES=519, PETRI_TRANSITIONS=639} [2024-06-14 14:20:44,659 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 474 predicate places. [2024-06-14 14:20:44,659 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 639 transitions, 8242 flow [2024-06-14 14:20:44,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:44,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:44,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:44,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 14:20:44,659 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:44,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash -409857742, now seen corresponding path program 9 times [2024-06-14 14:20:44,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:44,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756066150] [2024-06-14 14:20:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:44,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756066150] [2024-06-14 14:20:44,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756066150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:44,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:44,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:20:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822930773] [2024-06-14 14:20:44,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:44,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:20:44,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:44,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:20:44,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:20:44,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:44,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 639 transitions, 8242 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:44,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:44,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:44,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:47,023 INFO L124 PetriNetUnfolderBase]: 3912/6787 cut-off events. [2024-06-14 14:20:47,023 INFO L125 PetriNetUnfolderBase]: For 2106944/2106944 co-relation queries the response was YES. [2024-06-14 14:20:47,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58973 conditions, 6787 events. 3912/6787 cut-off events. For 2106944/2106944 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 49188 event pairs, 730 based on Foata normal form. 12/6794 useless extension candidates. Maximal degree in co-relation 58728. Up to 5459 conditions per place. [2024-06-14 14:20:47,140 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 464 selfloop transitions, 195 changer transitions 0/668 dead transitions. [2024-06-14 14:20:47,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 668 transitions, 10258 flow [2024-06-14 14:20:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:20:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:20:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-14 14:20:47,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659090909090909 [2024-06-14 14:20:47,140 INFO L175 Difference]: Start difference. First operand has 519 places, 639 transitions, 8242 flow. Second operand 10 states and 249 transitions. [2024-06-14 14:20:47,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 668 transitions, 10258 flow [2024-06-14 14:21:02,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 668 transitions, 9782 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-14 14:21:02,259 INFO L231 Difference]: Finished difference. Result has 521 places, 643 transitions, 8409 flow [2024-06-14 14:21:02,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7766, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8409, PETRI_PLACES=521, PETRI_TRANSITIONS=643} [2024-06-14 14:21:02,260 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 476 predicate places. [2024-06-14 14:21:02,260 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 643 transitions, 8409 flow [2024-06-14 14:21:02,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:02,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:02,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:02,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 14:21:02,260 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:21:02,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash -901351980, now seen corresponding path program 10 times [2024-06-14 14:21:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:02,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982493833] [2024-06-14 14:21:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:02,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:02,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:02,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982493833] [2024-06-14 14:21:02,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982493833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:02,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:02,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:21:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853155095] [2024-06-14 14:21:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:02,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:21:02,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:02,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:21:02,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:21:02,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:21:02,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 643 transitions, 8409 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:02,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:02,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:21:02,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:04,508 INFO L124 PetriNetUnfolderBase]: 3876/6737 cut-off events. [2024-06-14 14:21:04,508 INFO L125 PetriNetUnfolderBase]: For 1906248/1906248 co-relation queries the response was YES. [2024-06-14 14:21:04,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54803 conditions, 6737 events. 3876/6737 cut-off events. For 1906248/1906248 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 48823 event pairs, 728 based on Foata normal form. 16/6748 useless extension candidates. Maximal degree in co-relation 54557. Up to 5631 conditions per place. [2024-06-14 14:21:04,629 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 462 selfloop transitions, 194 changer transitions 0/665 dead transitions. [2024-06-14 14:21:04,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 665 transitions, 9789 flow [2024-06-14 14:21:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:21:04,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:21:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-14 14:21:04,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:21:04,630 INFO L175 Difference]: Start difference. First operand has 521 places, 643 transitions, 8409 flow. Second operand 11 states and 264 transitions. [2024-06-14 14:21:04,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 665 transitions, 9789 flow [2024-06-14 14:21:14,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 665 transitions, 9347 flow, removed 106 selfloop flow, removed 6 redundant places. [2024-06-14 14:21:14,043 INFO L231 Difference]: Finished difference. Result has 526 places, 643 transitions, 8361 flow [2024-06-14 14:21:14,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8361, PETRI_PLACES=526, PETRI_TRANSITIONS=643} [2024-06-14 14:21:14,043 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 481 predicate places. [2024-06-14 14:21:14,043 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 643 transitions, 8361 flow [2024-06-14 14:21:14,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:14,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:14,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:14,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 14:21:14,044 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:21:14,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash 645430846, now seen corresponding path program 2 times [2024-06-14 14:21:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:14,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711147196] [2024-06-14 14:21:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:14,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:14,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:14,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711147196] [2024-06-14 14:21:14,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711147196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:14,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:14,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:21:14,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691618255] [2024-06-14 14:21:14,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:14,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:21:14,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:14,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:21:14,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:21:14,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:21:14,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 643 transitions, 8361 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:14,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:14,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:21:14,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:16,317 INFO L124 PetriNetUnfolderBase]: 3916/6807 cut-off events. [2024-06-14 14:21:16,317 INFO L125 PetriNetUnfolderBase]: For 1840809/1840809 co-relation queries the response was YES. [2024-06-14 14:21:16,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54785 conditions, 6807 events. 3916/6807 cut-off events. For 1840809/1840809 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 49474 event pairs, 726 based on Foata normal form. 12/6814 useless extension candidates. Maximal degree in co-relation 54537. Up to 5571 conditions per place. [2024-06-14 14:21:16,439 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 467 selfloop transitions, 195 changer transitions 0/671 dead transitions. [2024-06-14 14:21:16,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 671 transitions, 9897 flow [2024-06-14 14:21:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:21:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:21:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 290 transitions. [2024-06-14 14:21:16,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2024-06-14 14:21:16,440 INFO L175 Difference]: Start difference. First operand has 526 places, 643 transitions, 8361 flow. Second operand 12 states and 290 transitions. [2024-06-14 14:21:16,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 671 transitions, 9897 flow [2024-06-14 14:21:26,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 671 transitions, 9485 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 14:21:26,952 INFO L231 Difference]: Finished difference. Result has 528 places, 645 transitions, 8474 flow [2024-06-14 14:21:26,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7949, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8474, PETRI_PLACES=528, PETRI_TRANSITIONS=645} [2024-06-14 14:21:26,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 483 predicate places. [2024-06-14 14:21:26,953 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 645 transitions, 8474 flow [2024-06-14 14:21:26,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:26,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:26,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:26,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 14:21:26,953 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:21:26,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:26,953 INFO L85 PathProgramCache]: Analyzing trace with hash 408372798, now seen corresponding path program 3 times [2024-06-14 14:21:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:26,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906849427] [2024-06-14 14:21:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:27,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:27,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906849427] [2024-06-14 14:21:27,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906849427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:27,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:27,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:21:27,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134670600] [2024-06-14 14:21:27,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:27,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:21:27,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:21:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:21:27,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:21:27,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 645 transitions, 8474 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:27,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:27,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:21:27,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15