./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.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/safe005_tso.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/safe005_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe005_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:51:55,913 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:51:55,954 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:51:55,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:51:55,958 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:51:55,972 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:51:55,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:51:55,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:51:55,974 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:51:55,974 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:51:55,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:51:55,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:51:55,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:51:55,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:51:55,975 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:51:55,976 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:51:55,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:51:55,976 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:51:55,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:51:55,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:51:55,977 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:51:55,978 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:51:55,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:51:55,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:51:55,978 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:51:55,979 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:51:55,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:51:55,979 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:51:55,980 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:51:55,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:51:55,980 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:51:55,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:51:55,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:55,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:51:55,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:51:55,982 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:51:55,982 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:51:55,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:51:55,983 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:51:55,983 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:51:55,983 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:51:55,984 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:51:55,984 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:51:55,984 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:51:56,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:51:56,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:51:56,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:51:56,237 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:51:56,237 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:51:56,238 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe005_tso.yml/witness.yml [2024-06-14 13:51:56,365 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:51:56,365 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:51:56,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-14 13:51:57,386 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:51:57,616 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:51:57,617 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-14 13:51:57,632 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e0de07f1/f93bfb83962c43dfbb893b77376f29fa/FLAGd2a288087 [2024-06-14 13:51:57,660 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e0de07f1/f93bfb83962c43dfbb893b77376f29fa [2024-06-14 13:51:57,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:51:57,668 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:51:57,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:57,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:51:57,674 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:51:57,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:56" (1/2) ... [2024-06-14 13:51:57,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18530cde and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:57, skipping insertion in model container [2024-06-14 13:51:57,675 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:56" (1/2) ... [2024-06-14 13:51:57,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@431d54d6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:57, skipping insertion in model container [2024-06-14 13:51:57,677 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:57" (2/2) ... [2024-06-14 13:51:57,677 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18530cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:57, skipping insertion in model container [2024-06-14 13:51:57,677 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:57" (2/2) ... [2024-06-14 13:51:57,678 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:51:57,717 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:51:57,718 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! 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 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 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_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:51:57,719 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:51:57,719 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! 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 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 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_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (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_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:51:57,719 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:51:57,719 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-14 13:51:57,749 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:51:57,994 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:58,004 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:51:58,156 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:58,183 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:51:58,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58 WrapperNode [2024-06-14 13:51:58,184 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:58,185 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:58,185 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:51:58,185 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:51:58,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,208 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,267 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-14 13:51:58,268 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:58,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:51:58,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:51:58,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:51:58,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,304 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,315 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 13:51:58,316 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,319 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,333 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,335 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,338 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,341 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:51:58,342 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:51:58,342 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:51:58,342 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:51:58,342 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (1/1) ... [2024-06-14 13:51:58,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:58,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:51:58,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:51:58,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:51:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:51:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:51:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:51:58,402 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:51:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:51:58,403 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:51:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:51:58,403 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:51:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:51:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:51:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:51:58,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:51:58,405 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:51:58,489 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:51:58,491 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:51:58,757 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:51:58,758 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:51:58,840 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:51:58,841 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:51:58,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:58 BoogieIcfgContainer [2024-06-14 13:51:58,841 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:51:58,843 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:51:58,843 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:51:58,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:51:58,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:56" (1/4) ... [2024-06-14 13:51:58,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a30e28d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:51:58, skipping insertion in model container [2024-06-14 13:51:58,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:51:57" (2/4) ... [2024-06-14 13:51:58,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a30e28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:51:58, skipping insertion in model container [2024-06-14 13:51:58,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:58" (3/4) ... [2024-06-14 13:51:58,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a30e28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:51:58, skipping insertion in model container [2024-06-14 13:51:58,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:58" (4/4) ... [2024-06-14 13:51:58,847 INFO L112 eAbstractionObserver]: Analyzing ICFG safe005_tso.i [2024-06-14 13:51:58,860 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:51:58,860 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:51:58,860 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:51:58,903 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:51:58,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:51:58,963 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 13:51:58,963 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:58,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:51:58,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:51:58,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 13:51:58,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:51:58,987 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;@743de9d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:51:58,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:51:58,992 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:51:58,993 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:51:58,993 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:58,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:58,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:51:58,994 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:58,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:58,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-14 13:51:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:59,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607637756] [2024-06-14 13:51:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:59,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:59,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607637756] [2024-06-14 13:51:59,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607637756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:59,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:59,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:51:59,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836470769] [2024-06-14 13:51:59,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:59,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:51:59,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:51:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:51:59,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-14 13:51:59,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:59,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-14 13:51:59,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:59,832 INFO L124 PetriNetUnfolderBase]: 470/795 cut-off events. [2024-06-14 13:51:59,833 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 13:51:59,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 795 events. 470/795 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3833 event pairs, 281 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-14 13:51:59,845 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 29 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 13:51:59,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 167 flow [2024-06-14 13:51:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:51:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:51:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-14 13:51:59,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-14 13:51:59,856 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 87 transitions. [2024-06-14 13:51:59,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 167 flow [2024-06-14 13:51:59,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:59,862 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 13:51:59,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 13:51:59,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 13:51:59,867 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 13:51:59,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:59,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:59,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:51:59,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:59,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-14 13:51:59,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:59,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079167982] [2024-06-14 13:51:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:59,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:00,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:00,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079167982] [2024-06-14 13:52:00,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079167982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:00,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:00,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:52:00,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777892333] [2024-06-14 13:52:00,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:00,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:52:00,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:00,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:52:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:52:00,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:00,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:00,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:00,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:00,323 INFO L124 PetriNetUnfolderBase]: 724/1189 cut-off events. [2024-06-14 13:52:00,323 INFO L125 PetriNetUnfolderBase]: For 256/290 co-relation queries the response was YES. [2024-06-14 13:52:00,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 1189 events. 724/1189 cut-off events. For 256/290 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5988 event pairs, 401 based on Foata normal form. 3/1161 useless extension candidates. Maximal degree in co-relation 2706. Up to 1090 conditions per place. [2024-06-14 13:52:00,330 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-14 13:52:00,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 254 flow [2024-06-14 13:52:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-06-14 13:52:00,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-14 13:52:00,332 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 108 transitions. [2024-06-14 13:52:00,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 254 flow [2024-06-14 13:52:00,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:00,333 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-14 13:52:00,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-14 13:52:00,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-14 13:52:00,334 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-14 13:52:00,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:00,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:00,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:52:00,335 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 13:52:00,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash -365005390, now seen corresponding path program 1 times [2024-06-14 13:52:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:00,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123164787] [2024-06-14 13:52:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:00,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:00,693 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 13:52:00,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123164787] [2024-06-14 13:52:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123164787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:00,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:00,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:52:00,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410953849] [2024-06-14 13:52:00,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:00,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:52:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:52:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:52:00,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-14 13:52:00,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:00,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-14 13:52:00,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:00,854 INFO L124 PetriNetUnfolderBase]: 632/1066 cut-off events. [2024-06-14 13:52:00,854 INFO L125 PetriNetUnfolderBase]: For 588/681 co-relation queries the response was YES. [2024-06-14 13:52:00,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2740 conditions, 1066 events. 632/1066 cut-off events. For 588/681 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5437 event pairs, 334 based on Foata normal form. 2/1024 useless extension candidates. Maximal degree in co-relation 2722. Up to 968 conditions per place. [2024-06-14 13:52:00,861 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2024-06-14 13:52:00,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 282 flow [2024-06-14 13:52:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-14 13:52:00,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-14 13:52:00,866 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 4 states and 107 transitions. [2024-06-14 13:52:00,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 282 flow [2024-06-14 13:52:00,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 280 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:00,869 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 195 flow [2024-06-14 13:52:00,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-14 13:52:00,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-14 13:52:00,871 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 195 flow [2024-06-14 13:52:00,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:00,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:00,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:52:00,872 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 13:52:00,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:00,873 INFO L85 PathProgramCache]: Analyzing trace with hash 102085025, now seen corresponding path program 1 times [2024-06-14 13:52:00,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:00,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165439630] [2024-06-14 13:52:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:00,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:01,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:01,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165439630] [2024-06-14 13:52:01,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165439630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:01,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:01,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265866394] [2024-06-14 13:52:01,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:01,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:01,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:01,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:01,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:01,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:01,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:01,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:01,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:01,412 INFO L124 PetriNetUnfolderBase]: 908/1469 cut-off events. [2024-06-14 13:52:01,413 INFO L125 PetriNetUnfolderBase]: For 1410/1410 co-relation queries the response was YES. [2024-06-14 13:52:01,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4145 conditions, 1469 events. 908/1469 cut-off events. For 1410/1410 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7285 event pairs, 290 based on Foata normal form. 6/1462 useless extension candidates. Maximal degree in co-relation 4124. Up to 1315 conditions per place. [2024-06-14 13:52:01,421 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 56 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-14 13:52:01,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 413 flow [2024-06-14 13:52:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:52:01,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 13:52:01,423 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 195 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:52:01,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 413 flow [2024-06-14 13:52:01,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 396 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:01,426 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 235 flow [2024-06-14 13:52:01,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-14 13:52:01,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-14 13:52:01,426 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 235 flow [2024-06-14 13:52:01,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:01,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:01,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:01,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:52:01,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:01,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1547392333, now seen corresponding path program 1 times [2024-06-14 13:52:01,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:01,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774229506] [2024-06-14 13:52:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:01,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:01,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:01,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774229506] [2024-06-14 13:52:01,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774229506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:01,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:01,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:01,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147806330] [2024-06-14 13:52:01,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:01,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:01,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:01,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:01,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:01,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:01,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:01,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:01,879 INFO L124 PetriNetUnfolderBase]: 917/1513 cut-off events. [2024-06-14 13:52:01,879 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2024-06-14 13:52:01,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4584 conditions, 1513 events. 917/1513 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7681 event pairs, 320 based on Foata normal form. 4/1511 useless extension candidates. Maximal degree in co-relation 4561. Up to 1318 conditions per place. [2024-06-14 13:52:01,888 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-14 13:52:01,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 473 flow [2024-06-14 13:52:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 13:52:01,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-14 13:52:01,890 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 235 flow. Second operand 5 states and 127 transitions. [2024-06-14 13:52:01,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 473 flow [2024-06-14 13:52:01,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 448 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:01,900 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 308 flow [2024-06-14 13:52:01,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-14 13:52:01,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-14 13:52:01,902 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 308 flow [2024-06-14 13:52:01,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:01,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:01,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:01,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:52:01,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:01,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:01,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1373337693, now seen corresponding path program 1 times [2024-06-14 13:52:01,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:01,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010950833] [2024-06-14 13:52:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:02,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:02,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010950833] [2024-06-14 13:52:02,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010950833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:02,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:02,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:02,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878201239] [2024-06-14 13:52:02,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:02,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:02,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:02,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:02,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:02,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:02,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:02,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:02,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:02,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:02,402 INFO L124 PetriNetUnfolderBase]: 928/1534 cut-off events. [2024-06-14 13:52:02,402 INFO L125 PetriNetUnfolderBase]: For 3307/3310 co-relation queries the response was YES. [2024-06-14 13:52:02,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5234 conditions, 1534 events. 928/1534 cut-off events. For 3307/3310 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7754 event pairs, 341 based on Foata normal form. 2/1529 useless extension candidates. Maximal degree in co-relation 5209. Up to 1325 conditions per place. [2024-06-14 13:52:02,411 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-14 13:52:02,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 567 flow [2024-06-14 13:52:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 13:52:02,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-14 13:52:02,412 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 308 flow. Second operand 5 states and 131 transitions. [2024-06-14 13:52:02,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 567 flow [2024-06-14 13:52:02,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 535 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:02,419 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 372 flow [2024-06-14 13:52:02,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-06-14 13:52:02,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-14 13:52:02,421 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 372 flow [2024-06-14 13:52:02,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:02,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:02,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:02,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:52:02,422 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:02,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:02,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1440391685, now seen corresponding path program 2 times [2024-06-14 13:52:02,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:02,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956137891] [2024-06-14 13:52:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:02,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:02,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:02,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956137891] [2024-06-14 13:52:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956137891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:02,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:02,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814870501] [2024-06-14 13:52:02,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:02,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:02,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:02,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:02,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:02,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:02,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 372 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:02,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:02,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:02,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:02,904 INFO L124 PetriNetUnfolderBase]: 915/1511 cut-off events. [2024-06-14 13:52:02,904 INFO L125 PetriNetUnfolderBase]: For 3810/3810 co-relation queries the response was YES. [2024-06-14 13:52:02,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5272 conditions, 1511 events. 915/1511 cut-off events. For 3810/3810 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7637 event pairs, 336 based on Foata normal form. 4/1509 useless extension candidates. Maximal degree in co-relation 5245. Up to 1312 conditions per place. [2024-06-14 13:52:02,916 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 18 changer transitions 0/78 dead transitions. [2024-06-14 13:52:02,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 552 flow [2024-06-14 13:52:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 13:52:02,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 13:52:02,917 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 372 flow. Second operand 5 states and 125 transitions. [2024-06-14 13:52:02,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 552 flow [2024-06-14 13:52:02,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 529 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:02,923 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 395 flow [2024-06-14 13:52:02,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=395, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-14 13:52:02,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-14 13:52:02,925 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 395 flow [2024-06-14 13:52:02,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:02,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:02,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:02,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:52:02,925 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:02,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash 982400510, now seen corresponding path program 1 times [2024-06-14 13:52:02,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:02,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693952748] [2024-06-14 13:52:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:02,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:03,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:03,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693952748] [2024-06-14 13:52:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693952748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:03,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:03,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:03,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852453447] [2024-06-14 13:52:03,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:03,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:03,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:03,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:03,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 395 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:03,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:03,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:03,431 INFO L124 PetriNetUnfolderBase]: 924/1522 cut-off events. [2024-06-14 13:52:03,432 INFO L125 PetriNetUnfolderBase]: For 4814/4814 co-relation queries the response was YES. [2024-06-14 13:52:03,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5439 conditions, 1522 events. 924/1522 cut-off events. For 4814/4814 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7629 event pairs, 306 based on Foata normal form. 8/1524 useless extension candidates. Maximal degree in co-relation 5410. Up to 1291 conditions per place. [2024-06-14 13:52:03,478 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 22 changer transitions 0/86 dead transitions. [2024-06-14 13:52:03,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 623 flow [2024-06-14 13:52:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:52:03,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 13:52:03,480 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 395 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:52:03,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 623 flow [2024-06-14 13:52:03,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 594 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:03,486 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 444 flow [2024-06-14 13:52:03,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=444, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-14 13:52:03,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-14 13:52:03,487 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 444 flow [2024-06-14 13:52:03,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:03,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:03,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:52:03,487 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:03,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:03,488 INFO L85 PathProgramCache]: Analyzing trace with hash -530081774, now seen corresponding path program 1 times [2024-06-14 13:52:03,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:03,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623679908] [2024-06-14 13:52:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:03,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:03,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:03,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623679908] [2024-06-14 13:52:03,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623679908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:03,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:03,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:03,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233924715] [2024-06-14 13:52:03,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:03,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:03,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:03,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:03,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:03,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:03,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 444 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:03,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:03,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:03,983 INFO L124 PetriNetUnfolderBase]: 935/1547 cut-off events. [2024-06-14 13:52:03,984 INFO L125 PetriNetUnfolderBase]: For 5859/5859 co-relation queries the response was YES. [2024-06-14 13:52:03,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5862 conditions, 1547 events. 935/1547 cut-off events. For 5859/5859 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7811 event pairs, 308 based on Foata normal form. 2/1546 useless extension candidates. Maximal degree in co-relation 5832. Up to 1369 conditions per place. [2024-06-14 13:52:03,995 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 65 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2024-06-14 13:52:03,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 670 flow [2024-06-14 13:52:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 13:52:03,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 13:52:03,996 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 444 flow. Second operand 5 states and 126 transitions. [2024-06-14 13:52:03,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 670 flow [2024-06-14 13:52:04,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 87 transitions, 616 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:04,004 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 458 flow [2024-06-14 13:52:04,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=458, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-14 13:52:04,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-14 13:52:04,005 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 458 flow [2024-06-14 13:52:04,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:04,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:04,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:04,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:52:04,006 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:04,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:04,006 INFO L85 PathProgramCache]: Analyzing trace with hash 153155730, now seen corresponding path program 2 times [2024-06-14 13:52:04,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:04,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264659275] [2024-06-14 13:52:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:04,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:04,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264659275] [2024-06-14 13:52:04,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264659275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:04,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:04,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:04,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003823544] [2024-06-14 13:52:04,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:04,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:04,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:04,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:04,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:04,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 458 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:04,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:04,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:04,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:04,576 INFO L124 PetriNetUnfolderBase]: 962/1592 cut-off events. [2024-06-14 13:52:04,576 INFO L125 PetriNetUnfolderBase]: For 7209/7212 co-relation queries the response was YES. [2024-06-14 13:52:04,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6283 conditions, 1592 events. 962/1592 cut-off events. For 7209/7212 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8062 event pairs, 304 based on Foata normal form. 2/1587 useless extension candidates. Maximal degree in co-relation 6252. Up to 1299 conditions per place. [2024-06-14 13:52:04,589 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 35 changer transitions 0/120 dead transitions. [2024-06-14 13:52:04,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 120 transitions, 936 flow [2024-06-14 13:52:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 13:52:04,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 13:52:04,591 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 458 flow. Second operand 9 states and 222 transitions. [2024-06-14 13:52:04,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 120 transitions, 936 flow [2024-06-14 13:52:04,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 888 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:04,602 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 582 flow [2024-06-14 13:52:04,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=582, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-06-14 13:52:04,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-14 13:52:04,603 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 582 flow [2024-06-14 13:52:04,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:04,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:04,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:04,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:52:04,603 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 13:52:04,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1735659520, now seen corresponding path program 3 times [2024-06-14 13:52:04,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:04,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036703856] [2024-06-14 13:52:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:04,877 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 13:52:04,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:04,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036703856] [2024-06-14 13:52:04,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036703856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:04,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:04,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:04,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277342961] [2024-06-14 13:52:04,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:04,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:04,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:04,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:04,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 582 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:04,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:04,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:04,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:05,146 INFO L124 PetriNetUnfolderBase]: 952/1576 cut-off events. [2024-06-14 13:52:05,146 INFO L125 PetriNetUnfolderBase]: For 7815/7815 co-relation queries the response was YES. [2024-06-14 13:52:05,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6548 conditions, 1576 events. 952/1576 cut-off events. For 7815/7815 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8006 event pairs, 299 based on Foata normal form. 4/1574 useless extension candidates. Maximal degree in co-relation 6517. Up to 1291 conditions per place. [2024-06-14 13:52:05,157 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-14 13:52:05,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 906 flow [2024-06-14 13:52:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 13:52:05,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-14 13:52:05,159 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 582 flow. Second operand 8 states and 195 transitions. [2024-06-14 13:52:05,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 906 flow [2024-06-14 13:52:05,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 111 transitions, 823 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:05,169 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 572 flow [2024-06-14 13:52:05,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=572, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-06-14 13:52:05,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-14 13:52:05,170 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 572 flow [2024-06-14 13:52:05,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:05,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:05,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:05,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:52:05,170 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:05,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash 608205135, now seen corresponding path program 1 times [2024-06-14 13:52:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:05,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667371005] [2024-06-14 13:52:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:05,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:05,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667371005] [2024-06-14 13:52:05,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667371005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:05,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:05,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:05,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817545921] [2024-06-14 13:52:05,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:05,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:05,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:05,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:05,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:05,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:05,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 572 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:05,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:05,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:05,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:05,636 INFO L124 PetriNetUnfolderBase]: 963/1594 cut-off events. [2024-06-14 13:52:05,636 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-14 13:52:05,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6746 conditions, 1594 events. 963/1594 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8129 event pairs, 307 based on Foata normal form. 2/1587 useless extension candidates. Maximal degree in co-relation 6713. Up to 1351 conditions per place. [2024-06-14 13:52:05,649 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 27 changer transitions 0/97 dead transitions. [2024-06-14 13:52:05,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 818 flow [2024-06-14 13:52:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:05,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 13:52:05,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-14 13:52:05,651 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 572 flow. Second operand 5 states and 128 transitions. [2024-06-14 13:52:05,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 818 flow [2024-06-14 13:52:05,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 732 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:05,661 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 589 flow [2024-06-14 13:52:05,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=589, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-14 13:52:05,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-14 13:52:05,663 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 589 flow [2024-06-14 13:52:05,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:05,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:05,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:05,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:52:05,664 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:05,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:05,664 INFO L85 PathProgramCache]: Analyzing trace with hash 755814735, now seen corresponding path program 2 times [2024-06-14 13:52:05,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:05,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163501519] [2024-06-14 13:52:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:05,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:05,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:05,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163501519] [2024-06-14 13:52:05,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163501519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:05,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:05,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:05,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755960036] [2024-06-14 13:52:05,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:05,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:05,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:05,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:05,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 589 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:05,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:05,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:05,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:06,148 INFO L124 PetriNetUnfolderBase]: 974/1618 cut-off events. [2024-06-14 13:52:06,148 INFO L125 PetriNetUnfolderBase]: For 9891/9891 co-relation queries the response was YES. [2024-06-14 13:52:06,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6906 conditions, 1618 events. 974/1618 cut-off events. For 9891/9891 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8249 event pairs, 300 based on Foata normal form. 2/1614 useless extension candidates. Maximal degree in co-relation 6873. Up to 1315 conditions per place. [2024-06-14 13:52:06,159 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 74 selfloop transitions, 36 changer transitions 0/117 dead transitions. [2024-06-14 13:52:06,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 117 transitions, 961 flow [2024-06-14 13:52:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:52:06,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-14 13:52:06,161 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 589 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:52:06,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 117 transitions, 961 flow [2024-06-14 13:52:06,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 117 transitions, 908 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:06,173 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 645 flow [2024-06-14 13:52:06,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=645, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-14 13:52:06,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-14 13:52:06,174 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 645 flow [2024-06-14 13:52:06,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:06,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:06,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:52:06,175 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:06,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash 756022125, now seen corresponding path program 3 times [2024-06-14 13:52:06,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:06,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722612918] [2024-06-14 13:52:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:06,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:06,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:06,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722612918] [2024-06-14 13:52:06,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722612918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:06,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:06,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:06,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335577946] [2024-06-14 13:52:06,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:06,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:06,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:06,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:06,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:06,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:06,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 645 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:06,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:06,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:06,678 INFO L124 PetriNetUnfolderBase]: 969/1611 cut-off events. [2024-06-14 13:52:06,679 INFO L125 PetriNetUnfolderBase]: For 11320/11320 co-relation queries the response was YES. [2024-06-14 13:52:06,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7033 conditions, 1611 events. 969/1611 cut-off events. For 11320/11320 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8235 event pairs, 300 based on Foata normal form. 2/1607 useless extension candidates. Maximal degree in co-relation 6999. Up to 1310 conditions per place. [2024-06-14 13:52:06,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 41 changer transitions 0/119 dead transitions. [2024-06-14 13:52:06,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 119 transitions, 955 flow [2024-06-14 13:52:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 13:52:06,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 13:52:06,692 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 645 flow. Second operand 9 states and 213 transitions. [2024-06-14 13:52:06,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 119 transitions, 955 flow [2024-06-14 13:52:06,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 119 transitions, 875 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:06,709 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 655 flow [2024-06-14 13:52:06,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=655, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2024-06-14 13:52:06,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-14 13:52:06,710 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 655 flow [2024-06-14 13:52:06,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:06,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:06,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:52:06,711 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 13:52:06,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:06,711 INFO L85 PathProgramCache]: Analyzing trace with hash 311402351, now seen corresponding path program 1 times [2024-06-14 13:52:06,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:06,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426133294] [2024-06-14 13:52:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:06,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:07,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:07,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426133294] [2024-06-14 13:52:07,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426133294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:07,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:07,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:07,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627207321] [2024-06-14 13:52:07,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:07,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:07,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:07,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:07,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:07,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:07,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 655 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:07,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:07,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:07,258 INFO L124 PetriNetUnfolderBase]: 911/1566 cut-off events. [2024-06-14 13:52:07,258 INFO L125 PetriNetUnfolderBase]: For 12550/12550 co-relation queries the response was YES. [2024-06-14 13:52:07,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6926 conditions, 1566 events. 911/1566 cut-off events. For 12550/12550 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8197 event pairs, 293 based on Foata normal form. 2/1565 useless extension candidates. Maximal degree in co-relation 6891. Up to 1310 conditions per place. [2024-06-14 13:52:07,268 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 80 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-14 13:52:07,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 110 transitions, 967 flow [2024-06-14 13:52:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 13:52:07,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-14 13:52:07,270 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 655 flow. Second operand 5 states and 127 transitions. [2024-06-14 13:52:07,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 110 transitions, 967 flow [2024-06-14 13:52:07,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 872 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:07,282 INFO L231 Difference]: Finished difference. Result has 84 places, 94 transitions, 669 flow [2024-06-14 13:52:07,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=669, PETRI_PLACES=84, PETRI_TRANSITIONS=94} [2024-06-14 13:52:07,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-14 13:52:07,283 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 94 transitions, 669 flow [2024-06-14 13:52:07,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:07,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:07,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:52:07,284 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:07,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2041852043, now seen corresponding path program 1 times [2024-06-14 13:52:07,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:07,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029028677] [2024-06-14 13:52:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:07,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:07,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:07,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029028677] [2024-06-14 13:52:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029028677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:07,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:07,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:07,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020242160] [2024-06-14 13:52:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:07,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:07,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:07,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 94 transitions, 669 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:07,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:07,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:07,748 INFO L124 PetriNetUnfolderBase]: 996/1661 cut-off events. [2024-06-14 13:52:07,748 INFO L125 PetriNetUnfolderBase]: For 14614/14614 co-relation queries the response was YES. [2024-06-14 13:52:07,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 1661 events. 996/1661 cut-off events. For 14614/14614 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8533 event pairs, 304 based on Foata normal form. 4/1659 useless extension candidates. Maximal degree in co-relation 7475. Up to 1416 conditions per place. [2024-06-14 13:52:07,759 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 89 selfloop transitions, 20 changer transitions 0/116 dead transitions. [2024-06-14 13:52:07,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 116 transitions, 955 flow [2024-06-14 13:52:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:52:07,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 13:52:07,761 INFO L175 Difference]: Start difference. First operand has 84 places, 94 transitions, 669 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:52:07,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 116 transitions, 955 flow [2024-06-14 13:52:07,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 116 transitions, 939 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:07,775 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 722 flow [2024-06-14 13:52:07,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=722, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-06-14 13:52:07,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-14 13:52:07,775 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 722 flow [2024-06-14 13:52:07,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:07,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:07,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:52:07,776 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:07,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:07,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1792770143, now seen corresponding path program 2 times [2024-06-14 13:52:07,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:07,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140699118] [2024-06-14 13:52:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:07,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:08,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:08,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140699118] [2024-06-14 13:52:08,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140699118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:08,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:08,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:08,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941129299] [2024-06-14 13:52:08,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:08,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:08,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:08,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:08,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 722 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:08,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:08,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:08,228 INFO L124 PetriNetUnfolderBase]: 988/1654 cut-off events. [2024-06-14 13:52:08,228 INFO L125 PetriNetUnfolderBase]: For 16328/16328 co-relation queries the response was YES. [2024-06-14 13:52:08,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 1654 events. 988/1654 cut-off events. For 16328/16328 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8545 event pairs, 273 based on Foata normal form. 4/1652 useless extension candidates. Maximal degree in co-relation 7696. Up to 1345 conditions per place. [2024-06-14 13:52:08,240 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 90 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-14 13:52:08,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 119 transitions, 1020 flow [2024-06-14 13:52:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:52:08,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 13:52:08,243 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 722 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:52:08,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 119 transitions, 1020 flow [2024-06-14 13:52:08,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 969 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:08,259 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 748 flow [2024-06-14 13:52:08,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2024-06-14 13:52:08,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-14 13:52:08,260 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 748 flow [2024-06-14 13:52:08,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:08,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:08,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:52:08,261 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:08,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1323494667, now seen corresponding path program 2 times [2024-06-14 13:52:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105054628] [2024-06-14 13:52:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:08,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:08,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105054628] [2024-06-14 13:52:08,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105054628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:08,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:08,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:08,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988977888] [2024-06-14 13:52:08,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:08,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:08,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:08,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:08,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:08,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 748 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:08,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:08,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:08,754 INFO L124 PetriNetUnfolderBase]: 914/1586 cut-off events. [2024-06-14 13:52:08,754 INFO L125 PetriNetUnfolderBase]: For 17415/17415 co-relation queries the response was YES. [2024-06-14 13:52:08,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7526 conditions, 1586 events. 914/1586 cut-off events. For 17415/17415 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8369 event pairs, 296 based on Foata normal form. 4/1587 useless extension candidates. Maximal degree in co-relation 7485. Up to 1321 conditions per place. [2024-06-14 13:52:08,766 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 81 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2024-06-14 13:52:08,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 115 transitions, 1010 flow [2024-06-14 13:52:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-14 13:52:08,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2024-06-14 13:52:08,768 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 748 flow. Second operand 4 states and 109 transitions. [2024-06-14 13:52:08,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 115 transitions, 1010 flow [2024-06-14 13:52:08,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 115 transitions, 945 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:08,790 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 769 flow [2024-06-14 13:52:08,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=769, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-14 13:52:08,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-14 13:52:08,791 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 769 flow [2024-06-14 13:52:08,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:08,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:08,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:52:08,792 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:08,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1791327585, now seen corresponding path program 1 times [2024-06-14 13:52:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:08,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582606267] [2024-06-14 13:52:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:09,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582606267] [2024-06-14 13:52:09,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582606267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:09,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:09,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:09,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864529918] [2024-06-14 13:52:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:09,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:09,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:09,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:09,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:09,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:09,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 769 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 13:52:09,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:09,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:09,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:09,350 INFO L124 PetriNetUnfolderBase]: 1034/1728 cut-off events. [2024-06-14 13:52:09,350 INFO L125 PetriNetUnfolderBase]: For 20331/20331 co-relation queries the response was YES. [2024-06-14 13:52:09,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8546 conditions, 1728 events. 1034/1728 cut-off events. For 20331/20331 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8890 event pairs, 180 based on Foata normal form. 4/1729 useless extension candidates. Maximal degree in co-relation 8504. Up to 1443 conditions per place. [2024-06-14 13:52:09,361 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 107 selfloop transitions, 21 changer transitions 0/135 dead transitions. [2024-06-14 13:52:09,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 135 transitions, 1215 flow [2024-06-14 13:52:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:09,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 13:52:09,363 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 769 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:09,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 135 transitions, 1215 flow [2024-06-14 13:52:09,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1181 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:09,382 INFO L231 Difference]: Finished difference. Result has 97 places, 105 transitions, 840 flow [2024-06-14 13:52:09,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=840, PETRI_PLACES=97, PETRI_TRANSITIONS=105} [2024-06-14 13:52:09,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-14 13:52:09,383 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 105 transitions, 840 flow [2024-06-14 13:52:09,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 13:52:09,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:09,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:09,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:52:09,383 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:09,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:09,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1791388035, now seen corresponding path program 2 times [2024-06-14 13:52:09,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:09,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126051006] [2024-06-14 13:52:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:09,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:09,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:09,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126051006] [2024-06-14 13:52:09,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126051006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:09,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:09,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:09,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560563546] [2024-06-14 13:52:09,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:09,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:09,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:09,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:09,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:09,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:09,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 105 transitions, 840 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 13:52:09,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:09,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:09,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:09,945 INFO L124 PetriNetUnfolderBase]: 1026/1716 cut-off events. [2024-06-14 13:52:09,946 INFO L125 PetriNetUnfolderBase]: For 22153/22153 co-relation queries the response was YES. [2024-06-14 13:52:09,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8687 conditions, 1716 events. 1026/1716 cut-off events. For 22153/22153 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8868 event pairs, 264 based on Foata normal form. 4/1717 useless extension candidates. Maximal degree in co-relation 8644. Up to 1490 conditions per place. [2024-06-14 13:52:09,963 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 104 selfloop transitions, 17 changer transitions 0/128 dead transitions. [2024-06-14 13:52:09,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 128 transitions, 1140 flow [2024-06-14 13:52:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:52:09,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 13:52:09,965 INFO L175 Difference]: Start difference. First operand has 97 places, 105 transitions, 840 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:52:09,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 128 transitions, 1140 flow [2024-06-14 13:52:09,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1080 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:09,991 INFO L231 Difference]: Finished difference. Result has 100 places, 105 transitions, 821 flow [2024-06-14 13:52:09,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=821, PETRI_PLACES=100, PETRI_TRANSITIONS=105} [2024-06-14 13:52:09,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-14 13:52:09,991 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 105 transitions, 821 flow [2024-06-14 13:52:09,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 13:52:09,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:09,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:09,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:52:09,992 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:09,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:09,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2075114849, now seen corresponding path program 3 times [2024-06-14 13:52:09,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:09,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436802558] [2024-06-14 13:52:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:09,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:10,219 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 13:52:10,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:10,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436802558] [2024-06-14 13:52:10,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436802558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:10,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:10,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:10,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151343449] [2024-06-14 13:52:10,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:10,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:10,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:10,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:10,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:10,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:10,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 105 transitions, 821 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 13:52:10,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:10,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:10,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:10,576 INFO L124 PetriNetUnfolderBase]: 1043/1740 cut-off events. [2024-06-14 13:52:10,576 INFO L125 PetriNetUnfolderBase]: For 24713/24716 co-relation queries the response was YES. [2024-06-14 13:52:10,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8879 conditions, 1740 events. 1043/1740 cut-off events. For 24713/24716 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8971 event pairs, 276 based on Foata normal form. 4/1737 useless extension candidates. Maximal degree in co-relation 8834. Up to 1408 conditions per place. [2024-06-14 13:52:10,589 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 43 changer transitions 0/149 dead transitions. [2024-06-14 13:52:10,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 149 transitions, 1241 flow [2024-06-14 13:52:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-14 13:52:10,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-06-14 13:52:10,591 INFO L175 Difference]: Start difference. First operand has 100 places, 105 transitions, 821 flow. Second operand 10 states and 239 transitions. [2024-06-14 13:52:10,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 149 transitions, 1241 flow [2024-06-14 13:52:10,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 149 transitions, 1202 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:10,613 INFO L231 Difference]: Finished difference. Result has 105 places, 107 transitions, 909 flow [2024-06-14 13:52:10,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=909, PETRI_PLACES=105, PETRI_TRANSITIONS=107} [2024-06-14 13:52:10,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-14 13:52:10,614 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 107 transitions, 909 flow [2024-06-14 13:52:10,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 13:52:10,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:10,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:10,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:52:10,615 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:10,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1440300952, now seen corresponding path program 1 times [2024-06-14 13:52:10,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:10,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532164779] [2024-06-14 13:52:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:10,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:10,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:10,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532164779] [2024-06-14 13:52:10,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532164779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:10,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:10,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:10,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805357720] [2024-06-14 13:52:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:10,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:10,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:10,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:10,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:10,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 107 transitions, 909 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 13:52:10,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:10,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:10,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:11,116 INFO L124 PetriNetUnfolderBase]: 970/1674 cut-off events. [2024-06-14 13:52:11,117 INFO L125 PetriNetUnfolderBase]: For 26687/26696 co-relation queries the response was YES. [2024-06-14 13:52:11,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8872 conditions, 1674 events. 970/1674 cut-off events. For 26687/26696 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8872 event pairs, 265 based on Foata normal form. 4/1675 useless extension candidates. Maximal degree in co-relation 8826. Up to 1392 conditions per place. [2024-06-14 13:52:11,129 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 88 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2024-06-14 13:52:11,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 1285 flow [2024-06-14 13:52:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:52:11,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 13:52:11,130 INFO L175 Difference]: Start difference. First operand has 105 places, 107 transitions, 909 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:52:11,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 1285 flow [2024-06-14 13:52:11,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 130 transitions, 1176 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:11,156 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 930 flow [2024-06-14 13:52:11,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=930, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-14 13:52:11,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-14 13:52:11,157 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 930 flow [2024-06-14 13:52:11,157 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 13:52:11,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:11,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:11,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:52:11,158 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 13:52:11,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:11,158 INFO L85 PathProgramCache]: Analyzing trace with hash -495356575, now seen corresponding path program 4 times [2024-06-14 13:52:11,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:11,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842967761] [2024-06-14 13:52:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:11,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:11,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:11,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842967761] [2024-06-14 13:52:11,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842967761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:11,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:11,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:11,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122091214] [2024-06-14 13:52:11,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:11,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:11,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:11,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:11,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:11,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:11,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 930 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 13:52:11,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:11,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:11,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:11,714 INFO L124 PetriNetUnfolderBase]: 1103/1842 cut-off events. [2024-06-14 13:52:11,714 INFO L125 PetriNetUnfolderBase]: For 32881/32881 co-relation queries the response was YES. [2024-06-14 13:52:11,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9698 conditions, 1842 events. 1103/1842 cut-off events. For 32881/32881 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9710 event pairs, 280 based on Foata normal form. 20/1856 useless extension candidates. Maximal degree in co-relation 9651. Up to 1416 conditions per place. [2024-06-14 13:52:11,727 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 106 selfloop transitions, 40 changer transitions 0/153 dead transitions. [2024-06-14 13:52:11,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 153 transitions, 1366 flow [2024-06-14 13:52:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 13:52:11,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 13:52:11,729 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 930 flow. Second operand 9 states and 217 transitions. [2024-06-14 13:52:11,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 153 transitions, 1366 flow [2024-06-14 13:52:11,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 153 transitions, 1327 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:11,752 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 1017 flow [2024-06-14 13:52:11,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1017, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2024-06-14 13:52:11,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-14 13:52:11,753 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 1017 flow [2024-06-14 13:52:11,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 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 13:52:11,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:11,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:11,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:52:11,753 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:11,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1558727130, now seen corresponding path program 2 times [2024-06-14 13:52:11,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:11,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759730656] [2024-06-14 13:52:11,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:11,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:12,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:12,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759730656] [2024-06-14 13:52:12,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759730656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:12,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:12,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:12,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942801961] [2024-06-14 13:52:12,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:12,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:12,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:12,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:12,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:12,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:12,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 1017 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 13:52:12,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:12,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:12,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:12,262 INFO L124 PetriNetUnfolderBase]: 1014/1752 cut-off events. [2024-06-14 13:52:12,262 INFO L125 PetriNetUnfolderBase]: For 31603/31612 co-relation queries the response was YES. [2024-06-14 13:52:12,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9544 conditions, 1752 events. 1014/1752 cut-off events. For 31603/31612 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9422 event pairs, 272 based on Foata normal form. 11/1760 useless extension candidates. Maximal degree in co-relation 9495. Up to 1485 conditions per place. [2024-06-14 13:52:12,276 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 93 selfloop transitions, 22 changer transitions 0/130 dead transitions. [2024-06-14 13:52:12,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 130 transitions, 1285 flow [2024-06-14 13:52:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 13:52:12,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-14 13:52:12,278 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 1017 flow. Second operand 5 states and 128 transitions. [2024-06-14 13:52:12,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 130 transitions, 1285 flow [2024-06-14 13:52:12,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 130 transitions, 1179 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:12,306 INFO L231 Difference]: Finished difference. Result has 108 places, 115 transitions, 961 flow [2024-06-14 13:52:12,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=961, PETRI_PLACES=108, PETRI_TRANSITIONS=115} [2024-06-14 13:52:12,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-14 13:52:12,307 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 115 transitions, 961 flow [2024-06-14 13:52:12,307 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 13:52:12,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:12,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:12,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:52:12,308 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:12,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1233552404, now seen corresponding path program 1 times [2024-06-14 13:52:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:12,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088754521] [2024-06-14 13:52:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:12,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:12,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:12,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088754521] [2024-06-14 13:52:12,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088754521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:12,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:12,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:12,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490433356] [2024-06-14 13:52:12,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:12,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:12,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:12,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:12,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 115 transitions, 961 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:12,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:12,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:12,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:12,801 INFO L124 PetriNetUnfolderBase]: 1115/1873 cut-off events. [2024-06-14 13:52:12,801 INFO L125 PetriNetUnfolderBase]: For 33869/33869 co-relation queries the response was YES. [2024-06-14 13:52:12,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9941 conditions, 1873 events. 1115/1873 cut-off events. For 33869/33869 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9973 event pairs, 277 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 9891. Up to 1576 conditions per place. [2024-06-14 13:52:12,813 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 111 selfloop transitions, 34 changer transitions 0/152 dead transitions. [2024-06-14 13:52:12,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 1539 flow [2024-06-14 13:52:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:52:12,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 13:52:12,815 INFO L175 Difference]: Start difference. First operand has 108 places, 115 transitions, 961 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:52:12,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 1539 flow [2024-06-14 13:52:12,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 152 transitions, 1463 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:12,841 INFO L231 Difference]: Finished difference. Result has 112 places, 133 transitions, 1156 flow [2024-06-14 13:52:12,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1156, PETRI_PLACES=112, PETRI_TRANSITIONS=133} [2024-06-14 13:52:12,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-14 13:52:12,842 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 133 transitions, 1156 flow [2024-06-14 13:52:12,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:12,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:12,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:12,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:52:12,842 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:12,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432434, now seen corresponding path program 2 times [2024-06-14 13:52:12,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:12,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176163903] [2024-06-14 13:52:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:12,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:13,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:13,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176163903] [2024-06-14 13:52:13,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176163903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:13,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:13,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:13,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865702389] [2024-06-14 13:52:13,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:13,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:13,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:13,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:13,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 133 transitions, 1156 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:13,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:13,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:13,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:13,366 INFO L124 PetriNetUnfolderBase]: 1181/1988 cut-off events. [2024-06-14 13:52:13,366 INFO L125 PetriNetUnfolderBase]: For 38795/38795 co-relation queries the response was YES. [2024-06-14 13:52:13,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11101 conditions, 1988 events. 1181/1988 cut-off events. For 38795/38795 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10676 event pairs, 271 based on Foata normal form. 4/1989 useless extension candidates. Maximal degree in co-relation 11048. Up to 1733 conditions per place. [2024-06-14 13:52:13,379 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-14 13:52:13,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 170 transitions, 1784 flow [2024-06-14 13:52:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:52:13,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 13:52:13,381 INFO L175 Difference]: Start difference. First operand has 112 places, 133 transitions, 1156 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:52:13,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 170 transitions, 1784 flow [2024-06-14 13:52:13,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 170 transitions, 1736 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:13,416 INFO L231 Difference]: Finished difference. Result has 120 places, 153 transitions, 1437 flow [2024-06-14 13:52:13,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1437, PETRI_PLACES=120, PETRI_TRANSITIONS=153} [2024-06-14 13:52:13,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 13:52:13,417 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 153 transitions, 1437 flow [2024-06-14 13:52:13,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:13,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:13,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:13,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:52:13,417 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:13,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash -497410014, now seen corresponding path program 3 times [2024-06-14 13:52:13,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:13,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847729693] [2024-06-14 13:52:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:13,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:13,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:13,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847729693] [2024-06-14 13:52:13,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847729693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:13,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:13,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:13,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653377138] [2024-06-14 13:52:13,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:13,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:13,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:13,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:13,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 153 transitions, 1437 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:13,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:13,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:13,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:13,949 INFO L124 PetriNetUnfolderBase]: 1229/2069 cut-off events. [2024-06-14 13:52:13,950 INFO L125 PetriNetUnfolderBase]: For 43926/43926 co-relation queries the response was YES. [2024-06-14 13:52:13,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12132 conditions, 2069 events. 1229/2069 cut-off events. For 43926/43926 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11168 event pairs, 271 based on Foata normal form. 4/2070 useless extension candidates. Maximal degree in co-relation 12075. Up to 1695 conditions per place. [2024-06-14 13:52:13,963 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 123 selfloop transitions, 70 changer transitions 0/200 dead transitions. [2024-06-14 13:52:13,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 200 transitions, 2171 flow [2024-06-14 13:52:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 13:52:13,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-14 13:52:13,964 INFO L175 Difference]: Start difference. First operand has 120 places, 153 transitions, 1437 flow. Second operand 7 states and 178 transitions. [2024-06-14 13:52:13,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 200 transitions, 2171 flow [2024-06-14 13:52:14,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 200 transitions, 2074 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:14,007 INFO L231 Difference]: Finished difference. Result has 127 places, 172 transitions, 1812 flow [2024-06-14 13:52:14,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1812, PETRI_PLACES=127, PETRI_TRANSITIONS=172} [2024-06-14 13:52:14,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-14 13:52:14,008 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 172 transitions, 1812 flow [2024-06-14 13:52:14,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:14,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:14,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:14,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:52:14,009 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:14,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-14 13:52:14,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:14,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459311752] [2024-06-14 13:52:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:14,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:14,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:14,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459311752] [2024-06-14 13:52:14,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459311752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:14,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:14,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:14,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574198948] [2024-06-14 13:52:14,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:14,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:14,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 172 transitions, 1812 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 13:52:14,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:14,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:14,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:14,546 INFO L124 PetriNetUnfolderBase]: 1162/2000 cut-off events. [2024-06-14 13:52:14,546 INFO L125 PetriNetUnfolderBase]: For 47103/47103 co-relation queries the response was YES. [2024-06-14 13:52:14,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12420 conditions, 2000 events. 1162/2000 cut-off events. For 47103/47103 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10996 event pairs, 270 based on Foata normal form. 2/1999 useless extension candidates. Maximal degree in co-relation 12359. Up to 1647 conditions per place. [2024-06-14 13:52:14,563 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 144 selfloop transitions, 10 changer transitions 0/183 dead transitions. [2024-06-14 13:52:14,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 183 transitions, 2172 flow [2024-06-14 13:52:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 13:52:14,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 13:52:14,564 INFO L175 Difference]: Start difference. First operand has 127 places, 172 transitions, 1812 flow. Second operand 4 states and 101 transitions. [2024-06-14 13:52:14,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 183 transitions, 2172 flow [2024-06-14 13:52:14,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 183 transitions, 2081 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:14,616 INFO L231 Difference]: Finished difference. Result has 129 places, 174 transitions, 1780 flow [2024-06-14 13:52:14,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1780, PETRI_PLACES=129, PETRI_TRANSITIONS=174} [2024-06-14 13:52:14,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-14 13:52:14,617 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 174 transitions, 1780 flow [2024-06-14 13:52:14,617 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 13:52:14,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:14,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:14,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:52:14,617 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 13:52:14,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash -303418928, now seen corresponding path program 1 times [2024-06-14 13:52:14,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:14,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819616931] [2024-06-14 13:52:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:14,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:14,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:14,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819616931] [2024-06-14 13:52:14,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819616931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:14,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:14,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:14,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95026979] [2024-06-14 13:52:14,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:14,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:14,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:14,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:14,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 174 transitions, 1780 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:14,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:14,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:14,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:15,252 INFO L124 PetriNetUnfolderBase]: 1351/2285 cut-off events. [2024-06-14 13:52:15,253 INFO L125 PetriNetUnfolderBase]: For 55422/55422 co-relation queries the response was YES. [2024-06-14 13:52:15,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13918 conditions, 2285 events. 1351/2285 cut-off events. For 55422/55422 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12848 event pairs, 175 based on Foata normal form. 12/2288 useless extension candidates. Maximal degree in co-relation 13855. Up to 1603 conditions per place. [2024-06-14 13:52:15,268 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 167 selfloop transitions, 35 changer transitions 0/209 dead transitions. [2024-06-14 13:52:15,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2424 flow [2024-06-14 13:52:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 13:52:15,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-14 13:52:15,270 INFO L175 Difference]: Start difference. First operand has 129 places, 174 transitions, 1780 flow. Second operand 7 states and 177 transitions. [2024-06-14 13:52:15,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2424 flow [2024-06-14 13:52:15,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 2383 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:15,316 INFO L231 Difference]: Finished difference. Result has 134 places, 176 transitions, 1861 flow [2024-06-14 13:52:15,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1739, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1861, PETRI_PLACES=134, PETRI_TRANSITIONS=176} [2024-06-14 13:52:15,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-14 13:52:15,317 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 176 transitions, 1861 flow [2024-06-14 13:52:15,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:15,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:15,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:15,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:52:15,318 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 13:52:15,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:15,318 INFO L85 PathProgramCache]: Analyzing trace with hash 356189602, now seen corresponding path program 2 times [2024-06-14 13:52:15,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:15,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126705140] [2024-06-14 13:52:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:15,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:15,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:15,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126705140] [2024-06-14 13:52:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126705140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:15,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:15,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:15,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119205849] [2024-06-14 13:52:15,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:15,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:15,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:15,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:15,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:15,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:15,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 176 transitions, 1861 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:52:15,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:15,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:15,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:15,937 INFO L124 PetriNetUnfolderBase]: 1392/2356 cut-off events. [2024-06-14 13:52:15,937 INFO L125 PetriNetUnfolderBase]: For 59493/59493 co-relation queries the response was YES. [2024-06-14 13:52:15,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14543 conditions, 2356 events. 1392/2356 cut-off events. For 59493/59493 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13389 event pairs, 258 based on Foata normal form. 12/2359 useless extension candidates. Maximal degree in co-relation 14479. Up to 1737 conditions per place. [2024-06-14 13:52:15,952 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 166 selfloop transitions, 32 changer transitions 0/205 dead transitions. [2024-06-14 13:52:15,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 205 transitions, 2469 flow [2024-06-14 13:52:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:15,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 13:52:15,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-14 13:52:15,953 INFO L175 Difference]: Start difference. First operand has 134 places, 176 transitions, 1861 flow. Second operand 6 states and 155 transitions. [2024-06-14 13:52:15,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 205 transitions, 2469 flow [2024-06-14 13:52:16,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 205 transitions, 2425 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:16,012 INFO L231 Difference]: Finished difference. Result has 137 places, 177 transitions, 1911 flow [2024-06-14 13:52:16,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1911, PETRI_PLACES=137, PETRI_TRANSITIONS=177} [2024-06-14 13:52:16,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-14 13:52:16,012 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 177 transitions, 1911 flow [2024-06-14 13:52:16,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:52:16,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:16,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:16,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:52:16,013 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 13:52:16,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash 359310702, now seen corresponding path program 3 times [2024-06-14 13:52:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:16,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316392110] [2024-06-14 13:52:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:16,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:16,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:16,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316392110] [2024-06-14 13:52:16,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316392110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:16,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:16,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:16,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49119874] [2024-06-14 13:52:16,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:16,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:16,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:16,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:16,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:16,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 177 transitions, 1911 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:52:16,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:16,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:16,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:16,586 INFO L124 PetriNetUnfolderBase]: 1364/2317 cut-off events. [2024-06-14 13:52:16,586 INFO L125 PetriNetUnfolderBase]: For 60024/60024 co-relation queries the response was YES. [2024-06-14 13:52:16,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14146 conditions, 2317 events. 1364/2317 cut-off events. For 60024/60024 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13136 event pairs, 252 based on Foata normal form. 16/2324 useless extension candidates. Maximal degree in co-relation 14080. Up to 1857 conditions per place. [2024-06-14 13:52:16,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 162 selfloop transitions, 31 changer transitions 0/200 dead transitions. [2024-06-14 13:52:16,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 200 transitions, 2373 flow [2024-06-14 13:52:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 13:52:16,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 13:52:16,605 INFO L175 Difference]: Start difference. First operand has 137 places, 177 transitions, 1911 flow. Second operand 6 states and 153 transitions. [2024-06-14 13:52:16,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 200 transitions, 2373 flow [2024-06-14 13:52:16,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 200 transitions, 2286 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:16,671 INFO L231 Difference]: Finished difference. Result has 139 places, 177 transitions, 1897 flow [2024-06-14 13:52:16,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1897, PETRI_PLACES=139, PETRI_TRANSITIONS=177} [2024-06-14 13:52:16,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-14 13:52:16,672 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 177 transitions, 1897 flow [2024-06-14 13:52:16,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:52:16,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:16,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:16,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:52:16,673 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:16,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:16,673 INFO L85 PathProgramCache]: Analyzing trace with hash 687809292, now seen corresponding path program 4 times [2024-06-14 13:52:16,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:16,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085088023] [2024-06-14 13:52:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:16,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:16,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085088023] [2024-06-14 13:52:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085088023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:16,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515215681] [2024-06-14 13:52:16,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:16,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:16,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:16,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:16,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:16,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 177 transitions, 1897 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:16,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:16,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:16,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:17,353 INFO L124 PetriNetUnfolderBase]: 1422/2405 cut-off events. [2024-06-14 13:52:17,353 INFO L125 PetriNetUnfolderBase]: For 63789/63789 co-relation queries the response was YES. [2024-06-14 13:52:17,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14622 conditions, 2405 events. 1422/2405 cut-off events. For 63789/63789 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13674 event pairs, 312 based on Foata normal form. 16/2415 useless extension candidates. Maximal degree in co-relation 14555. Up to 1941 conditions per place. [2024-06-14 13:52:17,371 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 42 changer transitions 0/220 dead transitions. [2024-06-14 13:52:17,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 220 transitions, 2471 flow [2024-06-14 13:52:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-14 13:52:17,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-14 13:52:17,373 INFO L175 Difference]: Start difference. First operand has 139 places, 177 transitions, 1897 flow. Second operand 10 states and 236 transitions. [2024-06-14 13:52:17,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 220 transitions, 2471 flow [2024-06-14 13:52:17,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 220 transitions, 2396 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:17,432 INFO L231 Difference]: Finished difference. Result has 144 places, 178 transitions, 1939 flow [2024-06-14 13:52:17,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1939, PETRI_PLACES=144, PETRI_TRANSITIONS=178} [2024-06-14 13:52:17,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-14 13:52:17,433 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 178 transitions, 1939 flow [2024-06-14 13:52:17,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:17,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:17,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:52:17,433 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:17,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash 488507502, now seen corresponding path program 5 times [2024-06-14 13:52:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:17,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040521786] [2024-06-14 13:52:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:17,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:17,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:17,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040521786] [2024-06-14 13:52:17,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040521786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:17,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:17,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:17,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587295365] [2024-06-14 13:52:17,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:17,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:17,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:17,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:17,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 178 transitions, 1939 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:17,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:17,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:18,073 INFO L124 PetriNetUnfolderBase]: 1480/2523 cut-off events. [2024-06-14 13:52:18,074 INFO L125 PetriNetUnfolderBase]: For 68435/68435 co-relation queries the response was YES. [2024-06-14 13:52:18,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15283 conditions, 2523 events. 1480/2523 cut-off events. For 68435/68435 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14657 event pairs, 332 based on Foata normal form. 16/2533 useless extension candidates. Maximal degree in co-relation 15215. Up to 2039 conditions per place. [2024-06-14 13:52:18,092 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 37 changer transitions 0/217 dead transitions. [2024-06-14 13:52:18,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 217 transitions, 2499 flow [2024-06-14 13:52:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 13:52:18,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-14 13:52:18,094 INFO L175 Difference]: Start difference. First operand has 144 places, 178 transitions, 1939 flow. Second operand 9 states and 215 transitions. [2024-06-14 13:52:18,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 217 transitions, 2499 flow [2024-06-14 13:52:18,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 217 transitions, 2402 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:18,169 INFO L231 Difference]: Finished difference. Result has 145 places, 179 transitions, 1951 flow [2024-06-14 13:52:18,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1951, PETRI_PLACES=145, PETRI_TRANSITIONS=179} [2024-06-14 13:52:18,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 13:52:18,170 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 179 transitions, 1951 flow [2024-06-14 13:52:18,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:18,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:18,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:52:18,170 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:18,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:18,170 INFO L85 PathProgramCache]: Analyzing trace with hash 488359632, now seen corresponding path program 6 times [2024-06-14 13:52:18,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:18,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022193035] [2024-06-14 13:52:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:18,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:18,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:18,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022193035] [2024-06-14 13:52:18,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022193035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:18,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:18,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587564911] [2024-06-14 13:52:18,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:18,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:18,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:18,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:18,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:18,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:18,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 179 transitions, 1951 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:18,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:18,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:18,895 INFO L124 PetriNetUnfolderBase]: 1496/2555 cut-off events. [2024-06-14 13:52:18,896 INFO L125 PetriNetUnfolderBase]: For 69155/69155 co-relation queries the response was YES. [2024-06-14 13:52:18,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15319 conditions, 2555 events. 1496/2555 cut-off events. For 69155/69155 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14867 event pairs, 325 based on Foata normal form. 12/2561 useless extension candidates. Maximal degree in co-relation 15250. Up to 1772 conditions per place. [2024-06-14 13:52:18,912 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 41 changer transitions 0/221 dead transitions. [2024-06-14 13:52:18,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 221 transitions, 2535 flow [2024-06-14 13:52:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 13:52:18,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 13:52:18,914 INFO L175 Difference]: Start difference. First operand has 145 places, 179 transitions, 1951 flow. Second operand 9 states and 217 transitions. [2024-06-14 13:52:18,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 221 transitions, 2535 flow [2024-06-14 13:52:18,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 221 transitions, 2446 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:18,977 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 1981 flow [2024-06-14 13:52:18,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1981, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2024-06-14 13:52:18,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-14 13:52:18,977 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 1981 flow [2024-06-14 13:52:18,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:18,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:18,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:52:18,978 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:18,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash 688024494, now seen corresponding path program 1 times [2024-06-14 13:52:18,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:18,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211129343] [2024-06-14 13:52:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:18,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:19,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:19,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211129343] [2024-06-14 13:52:19,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211129343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:19,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:19,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:19,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038812358] [2024-06-14 13:52:19,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:19,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:19,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:19,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:19,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:19,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 1981 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:19,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:19,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:19,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:19,673 INFO L124 PetriNetUnfolderBase]: 1537/2636 cut-off events. [2024-06-14 13:52:19,673 INFO L125 PetriNetUnfolderBase]: For 73474/73474 co-relation queries the response was YES. [2024-06-14 13:52:19,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15780 conditions, 2636 events. 1537/2636 cut-off events. For 73474/73474 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15531 event pairs, 299 based on Foata normal form. 12/2642 useless extension candidates. Maximal degree in co-relation 15710. Up to 1853 conditions per place. [2024-06-14 13:52:19,694 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 48 changer transitions 0/226 dead transitions. [2024-06-14 13:52:19,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 226 transitions, 2591 flow [2024-06-14 13:52:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-14 13:52:19,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-06-14 13:52:19,695 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 1981 flow. Second operand 10 states and 239 transitions. [2024-06-14 13:52:19,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 226 transitions, 2591 flow [2024-06-14 13:52:19,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 226 transitions, 2490 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:19,770 INFO L231 Difference]: Finished difference. Result has 150 places, 181 transitions, 2014 flow [2024-06-14 13:52:19,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2014, PETRI_PLACES=150, PETRI_TRANSITIONS=181} [2024-06-14 13:52:19,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 13:52:19,771 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 181 transitions, 2014 flow [2024-06-14 13:52:19,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:19,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:19,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:19,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:52:19,771 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:19,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash 5781188, now seen corresponding path program 1 times [2024-06-14 13:52:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:19,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836415462] [2024-06-14 13:52:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:19,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:19,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:19,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836415462] [2024-06-14 13:52:19,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836415462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:19,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:19,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:19,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147308637] [2024-06-14 13:52:19,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:19,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:19,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:19,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:19,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:20,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:20,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 181 transitions, 2014 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:20,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:20,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:20,363 INFO L124 PetriNetUnfolderBase]: 1558/2668 cut-off events. [2024-06-14 13:52:20,364 INFO L125 PetriNetUnfolderBase]: For 73633/73636 co-relation queries the response was YES. [2024-06-14 13:52:20,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16149 conditions, 2668 events. 1558/2668 cut-off events. For 73633/73636 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15732 event pairs, 368 based on Foata normal form. 1/2661 useless extension candidates. Maximal degree in co-relation 16078. Up to 2261 conditions per place. [2024-06-14 13:52:20,385 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 147 selfloop transitions, 61 changer transitions 0/215 dead transitions. [2024-06-14 13:52:20,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 215 transitions, 2845 flow [2024-06-14 13:52:20,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 13:52:20,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-14 13:52:20,386 INFO L175 Difference]: Start difference. First operand has 150 places, 181 transitions, 2014 flow. Second operand 6 states and 152 transitions. [2024-06-14 13:52:20,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 215 transitions, 2845 flow [2024-06-14 13:52:20,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 215 transitions, 2727 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:20,466 INFO L231 Difference]: Finished difference. Result has 149 places, 193 transitions, 2225 flow [2024-06-14 13:52:20,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2225, PETRI_PLACES=149, PETRI_TRANSITIONS=193} [2024-06-14 13:52:20,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-14 13:52:20,466 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 193 transitions, 2225 flow [2024-06-14 13:52:20,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:20,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:20,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:52:20,467 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:20,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:20,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1705227346, now seen corresponding path program 2 times [2024-06-14 13:52:20,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:20,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658116186] [2024-06-14 13:52:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:20,684 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 13:52:20,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:20,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658116186] [2024-06-14 13:52:20,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658116186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:20,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:20,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:20,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384512624] [2024-06-14 13:52:20,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:20,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:20,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:20,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:20,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:20,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 193 transitions, 2225 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:20,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:20,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:21,046 INFO L124 PetriNetUnfolderBase]: 1563/2677 cut-off events. [2024-06-14 13:52:21,046 INFO L125 PetriNetUnfolderBase]: For 76131/76134 co-relation queries the response was YES. [2024-06-14 13:52:21,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16231 conditions, 2677 events. 1563/2677 cut-off events. For 76131/76134 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15830 event pairs, 368 based on Foata normal form. 1/2670 useless extension candidates. Maximal degree in co-relation 16158. Up to 2268 conditions per place. [2024-06-14 13:52:21,069 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 64 changer transitions 0/215 dead transitions. [2024-06-14 13:52:21,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 215 transitions, 2930 flow [2024-06-14 13:52:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 13:52:21,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 13:52:21,070 INFO L175 Difference]: Start difference. First operand has 149 places, 193 transitions, 2225 flow. Second operand 6 states and 150 transitions. [2024-06-14 13:52:21,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 215 transitions, 2930 flow [2024-06-14 13:52:21,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 215 transitions, 2849 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:21,153 INFO L231 Difference]: Finished difference. Result has 154 places, 196 transitions, 2317 flow [2024-06-14 13:52:21,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2317, PETRI_PLACES=154, PETRI_TRANSITIONS=196} [2024-06-14 13:52:21,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-14 13:52:21,154 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 196 transitions, 2317 flow [2024-06-14 13:52:21,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:21,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:21,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:52:21,154 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:21,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1293295816, now seen corresponding path program 2 times [2024-06-14 13:52:21,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:21,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051359895] [2024-06-14 13:52:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:21,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:21,376 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 13:52:21,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:21,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051359895] [2024-06-14 13:52:21,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051359895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:21,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:21,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:21,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36675957] [2024-06-14 13:52:21,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:21,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:21,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:21,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:21,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 196 transitions, 2317 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:21,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:21,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:21,876 INFO L124 PetriNetUnfolderBase]: 1604/2752 cut-off events. [2024-06-14 13:52:21,876 INFO L125 PetriNetUnfolderBase]: For 86874/86874 co-relation queries the response was YES. [2024-06-14 13:52:21,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16766 conditions, 2752 events. 1604/2752 cut-off events. For 86874/86874 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16422 event pairs, 353 based on Foata normal form. 12/2758 useless extension candidates. Maximal degree in co-relation 16691. Up to 2144 conditions per place. [2024-06-14 13:52:21,898 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 43 changer transitions 0/242 dead transitions. [2024-06-14 13:52:21,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 242 transitions, 2961 flow [2024-06-14 13:52:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-14 13:52:21,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:52:21,899 INFO L175 Difference]: Start difference. First operand has 154 places, 196 transitions, 2317 flow. Second operand 10 states and 240 transitions. [2024-06-14 13:52:21,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 242 transitions, 2961 flow [2024-06-14 13:52:21,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 242 transitions, 2832 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:22,000 INFO L231 Difference]: Finished difference. Result has 162 places, 197 transitions, 2314 flow [2024-06-14 13:52:22,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2314, PETRI_PLACES=162, PETRI_TRANSITIONS=197} [2024-06-14 13:52:22,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-14 13:52:22,000 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 197 transitions, 2314 flow [2024-06-14 13:52:22,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:22,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:22,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:52:22,001 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:22,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash -18362134, now seen corresponding path program 3 times [2024-06-14 13:52:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:22,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986244162] [2024-06-14 13:52:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:22,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:22,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:22,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986244162] [2024-06-14 13:52:22,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986244162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:22,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:22,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:22,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143467298] [2024-06-14 13:52:22,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:22,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:22,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:22,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:22,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 197 transitions, 2314 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:22,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:22,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:22,701 INFO L124 PetriNetUnfolderBase]: 1584/2732 cut-off events. [2024-06-14 13:52:22,702 INFO L125 PetriNetUnfolderBase]: For 85256/85256 co-relation queries the response was YES. [2024-06-14 13:52:22,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16321 conditions, 2732 events. 1584/2732 cut-off events. For 85256/85256 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16415 event pairs, 298 based on Foata normal form. 12/2738 useless extension candidates. Maximal degree in co-relation 16245. Up to 1455 conditions per place. [2024-06-14 13:52:22,720 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 50 changer transitions 0/238 dead transitions. [2024-06-14 13:52:22,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 238 transitions, 2854 flow [2024-06-14 13:52:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 13:52:22,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 13:52:22,721 INFO L175 Difference]: Start difference. First operand has 162 places, 197 transitions, 2314 flow. Second operand 9 states and 217 transitions. [2024-06-14 13:52:22,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 238 transitions, 2854 flow [2024-06-14 13:52:22,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 238 transitions, 2730 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:22,804 INFO L231 Difference]: Finished difference. Result has 162 places, 196 transitions, 2242 flow [2024-06-14 13:52:22,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2242, PETRI_PLACES=162, PETRI_TRANSITIONS=196} [2024-06-14 13:52:22,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-14 13:52:22,804 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 196 transitions, 2242 flow [2024-06-14 13:52:22,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:22,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:22,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:52:22,805 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:22,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1414684752, now seen corresponding path program 3 times [2024-06-14 13:52:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:22,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985204724] [2024-06-14 13:52:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:22,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:23,026 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 13:52:23,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:23,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985204724] [2024-06-14 13:52:23,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985204724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:23,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:23,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076842596] [2024-06-14 13:52:23,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:23,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:23,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:23,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:23,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 196 transitions, 2242 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:23,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:23,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:23,358 INFO L124 PetriNetUnfolderBase]: 1578/2714 cut-off events. [2024-06-14 13:52:23,358 INFO L125 PetriNetUnfolderBase]: For 74396/74396 co-relation queries the response was YES. [2024-06-14 13:52:23,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15866 conditions, 2714 events. 1578/2714 cut-off events. For 74396/74396 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16224 event pairs, 357 based on Foata normal form. 2/2710 useless extension candidates. Maximal degree in co-relation 15789. Up to 2302 conditions per place. [2024-06-14 13:52:23,380 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 147 selfloop transitions, 60 changer transitions 0/214 dead transitions. [2024-06-14 13:52:23,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 214 transitions, 2840 flow [2024-06-14 13:52:23,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:52:23,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 13:52:23,381 INFO L175 Difference]: Start difference. First operand has 162 places, 196 transitions, 2242 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:52:23,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 214 transitions, 2840 flow [2024-06-14 13:52:23,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 214 transitions, 2667 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:23,477 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 2196 flow [2024-06-14 13:52:23,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2196, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-06-14 13:52:23,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-14 13:52:23,478 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 2196 flow [2024-06-14 13:52:23,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:23,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:23,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:52:23,478 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:23,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1710710470, now seen corresponding path program 4 times [2024-06-14 13:52:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:23,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139861822] [2024-06-14 13:52:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:23,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:23,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:23,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139861822] [2024-06-14 13:52:23,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139861822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:23,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:23,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:23,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956171110] [2024-06-14 13:52:23,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:23,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:23,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:23,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:23,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 2196 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:23,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:23,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:24,071 INFO L124 PetriNetUnfolderBase]: 1562/2693 cut-off events. [2024-06-14 13:52:24,073 INFO L125 PetriNetUnfolderBase]: For 74212/74212 co-relation queries the response was YES. [2024-06-14 13:52:24,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15224 conditions, 2693 events. 1562/2693 cut-off events. For 74212/74212 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16039 event pairs, 349 based on Foata normal form. 4/2694 useless extension candidates. Maximal degree in co-relation 15147. Up to 2383 conditions per place. [2024-06-14 13:52:24,110 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 37 changer transitions 0/211 dead transitions. [2024-06-14 13:52:24,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 211 transitions, 2647 flow [2024-06-14 13:52:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:52:24,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 13:52:24,119 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 2196 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:52:24,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 211 transitions, 2647 flow [2024-06-14 13:52:24,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 211 transitions, 2555 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:24,248 INFO L231 Difference]: Finished difference. Result has 165 places, 196 transitions, 2193 flow [2024-06-14 13:52:24,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2193, PETRI_PLACES=165, PETRI_TRANSITIONS=196} [2024-06-14 13:52:24,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-14 13:52:24,249 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 196 transitions, 2193 flow [2024-06-14 13:52:24,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:24,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:24,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:52:24,250 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:24,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash 562142638, now seen corresponding path program 5 times [2024-06-14 13:52:24,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:24,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833899059] [2024-06-14 13:52:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:24,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:24,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:24,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833899059] [2024-06-14 13:52:24,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833899059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:24,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:24,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:24,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895408665] [2024-06-14 13:52:24,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:24,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:24,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:24,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:24,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:24,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:24,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 196 transitions, 2193 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:24,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:24,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:24,845 INFO L124 PetriNetUnfolderBase]: 1564/2697 cut-off events. [2024-06-14 13:52:24,845 INFO L125 PetriNetUnfolderBase]: For 75918/75921 co-relation queries the response was YES. [2024-06-14 13:52:24,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15228 conditions, 2697 events. 1564/2697 cut-off events. For 75918/75921 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16097 event pairs, 357 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 15150. Up to 2275 conditions per place. [2024-06-14 13:52:24,867 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 140 selfloop transitions, 75 changer transitions 0/222 dead transitions. [2024-06-14 13:52:24,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 222 transitions, 2807 flow [2024-06-14 13:52:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 13:52:24,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 13:52:24,868 INFO L175 Difference]: Start difference. First operand has 165 places, 196 transitions, 2193 flow. Second operand 6 states and 156 transitions. [2024-06-14 13:52:24,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 222 transitions, 2807 flow [2024-06-14 13:52:24,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 222 transitions, 2721 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:24,978 INFO L231 Difference]: Finished difference. Result has 165 places, 199 transitions, 2323 flow [2024-06-14 13:52:24,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2323, PETRI_PLACES=165, PETRI_TRANSITIONS=199} [2024-06-14 13:52:24,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-14 13:52:24,979 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 199 transitions, 2323 flow [2024-06-14 13:52:24,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:24,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:24,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:52:24,981 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:24,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:24,981 INFO L85 PathProgramCache]: Analyzing trace with hash 562322128, now seen corresponding path program 6 times [2024-06-14 13:52:24,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:24,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323201783] [2024-06-14 13:52:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:24,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:25,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:25,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323201783] [2024-06-14 13:52:25,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323201783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:25,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:25,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:25,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138953537] [2024-06-14 13:52:25,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:25,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:25,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:25,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:25,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 199 transitions, 2323 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:25,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:25,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:25,627 INFO L124 PetriNetUnfolderBase]: 1548/2674 cut-off events. [2024-06-14 13:52:25,628 INFO L125 PetriNetUnfolderBase]: For 77844/77844 co-relation queries the response was YES. [2024-06-14 13:52:25,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15149 conditions, 2674 events. 1548/2674 cut-off events. For 77844/77844 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15946 event pairs, 349 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 15070. Up to 2259 conditions per place. [2024-06-14 13:52:25,648 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 75 changer transitions 0/225 dead transitions. [2024-06-14 13:52:25,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 225 transitions, 2825 flow [2024-06-14 13:52:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 13:52:25,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-14 13:52:25,649 INFO L175 Difference]: Start difference. First operand has 165 places, 199 transitions, 2323 flow. Second operand 7 states and 177 transitions. [2024-06-14 13:52:25,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 225 transitions, 2825 flow [2024-06-14 13:52:25,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 225 transitions, 2671 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:25,755 INFO L231 Difference]: Finished difference. Result has 169 places, 199 transitions, 2351 flow [2024-06-14 13:52:25,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2351, PETRI_PLACES=169, PETRI_TRANSITIONS=199} [2024-06-14 13:52:25,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 13:52:25,756 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 199 transitions, 2351 flow [2024-06-14 13:52:25,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:25,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:25,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:52:25,756 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:25,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:25,757 INFO L85 PathProgramCache]: Analyzing trace with hash 414582441, now seen corresponding path program 1 times [2024-06-14 13:52:25,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:25,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3645342] [2024-06-14 13:52:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:25,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3645342] [2024-06-14 13:52:25,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3645342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:25,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:25,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171643780] [2024-06-14 13:52:25,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:25,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:25,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:25,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:25,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:26,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:26,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 199 transitions, 2351 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:26,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:26,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:26,413 INFO L124 PetriNetUnfolderBase]: 1566/2680 cut-off events. [2024-06-14 13:52:26,413 INFO L125 PetriNetUnfolderBase]: For 80747/80747 co-relation queries the response was YES. [2024-06-14 13:52:26,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15457 conditions, 2680 events. 1566/2680 cut-off events. For 80747/80747 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15898 event pairs, 358 based on Foata normal form. 2/2676 useless extension candidates. Maximal degree in co-relation 15377. Up to 2187 conditions per place. [2024-06-14 13:52:26,434 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 95 changer transitions 0/235 dead transitions. [2024-06-14 13:52:26,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 235 transitions, 3197 flow [2024-06-14 13:52:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:52:26,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-14 13:52:26,435 INFO L175 Difference]: Start difference. First operand has 169 places, 199 transitions, 2351 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:52:26,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 235 transitions, 3197 flow [2024-06-14 13:52:26,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 235 transitions, 2961 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 13:52:26,546 INFO L231 Difference]: Finished difference. Result has 169 places, 216 transitions, 2606 flow [2024-06-14 13:52:26,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2606, PETRI_PLACES=169, PETRI_TRANSITIONS=216} [2024-06-14 13:52:26,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 13:52:26,546 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 216 transitions, 2606 flow [2024-06-14 13:52:26,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:26,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:26,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:52:26,547 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:26,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:26,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1710719553, now seen corresponding path program 2 times [2024-06-14 13:52:26,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:26,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562496003] [2024-06-14 13:52:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:26,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:26,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:26,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562496003] [2024-06-14 13:52:26,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562496003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:26,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429770855] [2024-06-14 13:52:26,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:26,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:26,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:26,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:26,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 216 transitions, 2606 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:26,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:26,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:27,229 INFO L124 PetriNetUnfolderBase]: 1600/2745 cut-off events. [2024-06-14 13:52:27,229 INFO L125 PetriNetUnfolderBase]: For 80781/80781 co-relation queries the response was YES. [2024-06-14 13:52:27,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16326 conditions, 2745 events. 1600/2745 cut-off events. For 80781/80781 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16365 event pairs, 348 based on Foata normal form. 2/2744 useless extension candidates. Maximal degree in co-relation 16245. Up to 2415 conditions per place. [2024-06-14 13:52:27,250 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 47 changer transitions 0/245 dead transitions. [2024-06-14 13:52:27,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 245 transitions, 3449 flow [2024-06-14 13:52:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:52:27,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 13:52:27,254 INFO L175 Difference]: Start difference. First operand has 169 places, 216 transitions, 2606 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:52:27,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 245 transitions, 3449 flow [2024-06-14 13:52:27,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 245 transitions, 3376 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:27,381 INFO L231 Difference]: Finished difference. Result has 177 places, 227 transitions, 2833 flow [2024-06-14 13:52:27,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2539, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2833, PETRI_PLACES=177, PETRI_TRANSITIONS=227} [2024-06-14 13:52:27,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-14 13:52:27,381 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 227 transitions, 2833 flow [2024-06-14 13:52:27,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:27,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:27,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:52:27,382 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:27,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1760160051, now seen corresponding path program 3 times [2024-06-14 13:52:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:27,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873008113] [2024-06-14 13:52:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:27,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:27,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:27,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873008113] [2024-06-14 13:52:27,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873008113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:27,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:27,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:27,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497315436] [2024-06-14 13:52:27,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:27,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:27,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:27,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:27,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 227 transitions, 2833 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:27,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:27,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:28,023 INFO L124 PetriNetUnfolderBase]: 1626/2788 cut-off events. [2024-06-14 13:52:28,023 INFO L125 PetriNetUnfolderBase]: For 85006/85006 co-relation queries the response was YES. [2024-06-14 13:52:28,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16623 conditions, 2788 events. 1626/2788 cut-off events. For 85006/85006 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 16690 event pairs, 348 based on Foata normal form. 2/2787 useless extension candidates. Maximal degree in co-relation 16538. Up to 2318 conditions per place. [2024-06-14 13:52:28,046 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 161 selfloop transitions, 99 changer transitions 0/267 dead transitions. [2024-06-14 13:52:28,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 267 transitions, 3756 flow [2024-06-14 13:52:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:52:28,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-14 13:52:28,047 INFO L175 Difference]: Start difference. First operand has 177 places, 227 transitions, 2833 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:52:28,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 267 transitions, 3756 flow [2024-06-14 13:52:28,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 267 transitions, 3675 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:28,174 INFO L231 Difference]: Finished difference. Result has 184 places, 238 transitions, 3217 flow [2024-06-14 13:52:28,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3217, PETRI_PLACES=184, PETRI_TRANSITIONS=238} [2024-06-14 13:52:28,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 13:52:28,174 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 238 transitions, 3217 flow [2024-06-14 13:52:28,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:28,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:28,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:52:28,175 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:28,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1327080689, now seen corresponding path program 1 times [2024-06-14 13:52:28,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:28,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613162843] [2024-06-14 13:52:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:28,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:28,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:28,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613162843] [2024-06-14 13:52:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613162843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:28,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:28,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:28,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008890431] [2024-06-14 13:52:28,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:28,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:28,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:28,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:28,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:28,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 238 transitions, 3217 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:28,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:28,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:28,810 INFO L124 PetriNetUnfolderBase]: 1631/2793 cut-off events. [2024-06-14 13:52:28,810 INFO L125 PetriNetUnfolderBase]: For 90419/90422 co-relation queries the response was YES. [2024-06-14 13:52:28,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17200 conditions, 2793 events. 1631/2793 cut-off events. For 90419/90422 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16759 event pairs, 369 based on Foata normal form. 1/2786 useless extension candidates. Maximal degree in co-relation 17111. Up to 2383 conditions per place. [2024-06-14 13:52:28,834 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 189 selfloop transitions, 67 changer transitions 0/263 dead transitions. [2024-06-14 13:52:28,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 263 transitions, 3986 flow [2024-06-14 13:52:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:52:28,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:52:28,835 INFO L175 Difference]: Start difference. First operand has 184 places, 238 transitions, 3217 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:52:28,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 263 transitions, 3986 flow [2024-06-14 13:52:29,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 263 transitions, 3903 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:29,040 INFO L231 Difference]: Finished difference. Result has 189 places, 241 transitions, 3321 flow [2024-06-14 13:52:29,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3321, PETRI_PLACES=189, PETRI_TRANSITIONS=241} [2024-06-14 13:52:29,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-14 13:52:29,041 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 241 transitions, 3321 flow [2024-06-14 13:52:29,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:29,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:29,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:52:29,042 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:29,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:29,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1327080503, now seen corresponding path program 1 times [2024-06-14 13:52:29,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:29,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806061598] [2024-06-14 13:52:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:29,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:29,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:29,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806061598] [2024-06-14 13:52:29,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806061598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:29,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:29,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:29,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888996872] [2024-06-14 13:52:29,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:29,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:29,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:29,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:29,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:29,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:29,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 241 transitions, 3321 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:29,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:29,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:29,675 INFO L124 PetriNetUnfolderBase]: 1652/2824 cut-off events. [2024-06-14 13:52:29,676 INFO L125 PetriNetUnfolderBase]: For 93021/93024 co-relation queries the response was YES. [2024-06-14 13:52:29,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17706 conditions, 2824 events. 1652/2824 cut-off events. For 93021/93024 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16936 event pairs, 383 based on Foata normal form. 1/2815 useless extension candidates. Maximal degree in co-relation 17615. Up to 2269 conditions per place. [2024-06-14 13:52:29,701 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 128 changer transitions 0/273 dead transitions. [2024-06-14 13:52:29,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 273 transitions, 4329 flow [2024-06-14 13:52:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 13:52:29,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-14 13:52:29,702 INFO L175 Difference]: Start difference. First operand has 189 places, 241 transitions, 3321 flow. Second operand 7 states and 172 transitions. [2024-06-14 13:52:29,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 273 transitions, 4329 flow [2024-06-14 13:52:29,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 273 transitions, 4177 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:29,867 INFO L231 Difference]: Finished difference. Result has 191 places, 250 transitions, 3611 flow [2024-06-14 13:52:29,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3611, PETRI_PLACES=191, PETRI_TRANSITIONS=250} [2024-06-14 13:52:29,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-14 13:52:29,868 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 250 transitions, 3611 flow [2024-06-14 13:52:29,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:29,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:29,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:52:29,869 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:29,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1149711833, now seen corresponding path program 2 times [2024-06-14 13:52:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:29,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413228915] [2024-06-14 13:52:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:30,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413228915] [2024-06-14 13:52:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413228915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:30,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:30,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:30,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867741143] [2024-06-14 13:52:30,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:30,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:30,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:30,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 250 transitions, 3611 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:30,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:30,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:30,507 INFO L124 PetriNetUnfolderBase]: 1665/2845 cut-off events. [2024-06-14 13:52:30,507 INFO L125 PetriNetUnfolderBase]: For 98889/98892 co-relation queries the response was YES. [2024-06-14 13:52:30,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18189 conditions, 2845 events. 1665/2845 cut-off events. For 98889/98892 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17083 event pairs, 384 based on Foata normal form. 1/2837 useless extension candidates. Maximal degree in co-relation 18097. Up to 2282 conditions per place. [2024-06-14 13:52:30,533 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 134 changer transitions 0/276 dead transitions. [2024-06-14 13:52:30,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 276 transitions, 4561 flow [2024-06-14 13:52:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:30,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 13:52:30,534 INFO L175 Difference]: Start difference. First operand has 191 places, 250 transitions, 3611 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:30,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 276 transitions, 4561 flow [2024-06-14 13:52:30,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 276 transitions, 4343 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:30,705 INFO L231 Difference]: Finished difference. Result has 195 places, 256 transitions, 3785 flow [2024-06-14 13:52:30,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3785, PETRI_PLACES=195, PETRI_TRANSITIONS=256} [2024-06-14 13:52:30,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-14 13:52:30,705 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 256 transitions, 3785 flow [2024-06-14 13:52:30,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:30,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:52:30,706 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:30,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1149948983, now seen corresponding path program 3 times [2024-06-14 13:52:30,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:30,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100435491] [2024-06-14 13:52:30,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:30,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:30,924 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 13:52:30,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:30,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100435491] [2024-06-14 13:52:30,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100435491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:30,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:30,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:30,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424323409] [2024-06-14 13:52:30,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:30,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:30,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:30,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:30,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 256 transitions, 3785 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:30,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:30,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:31,350 INFO L124 PetriNetUnfolderBase]: 1662/2840 cut-off events. [2024-06-14 13:52:31,350 INFO L125 PetriNetUnfolderBase]: For 102844/102847 co-relation queries the response was YES. [2024-06-14 13:52:31,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18226 conditions, 2840 events. 1662/2840 cut-off events. For 102844/102847 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17016 event pairs, 383 based on Foata normal form. 1/2831 useless extension candidates. Maximal degree in co-relation 18133. Up to 2280 conditions per place. [2024-06-14 13:52:31,377 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 132 changer transitions 0/276 dead transitions. [2024-06-14 13:52:31,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 276 transitions, 4623 flow [2024-06-14 13:52:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:31,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 13:52:31,424 INFO L175 Difference]: Start difference. First operand has 195 places, 256 transitions, 3785 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:31,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 276 transitions, 4623 flow [2024-06-14 13:52:31,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 276 transitions, 4324 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:31,598 INFO L231 Difference]: Finished difference. Result has 198 places, 256 transitions, 3756 flow [2024-06-14 13:52:31,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3756, PETRI_PLACES=198, PETRI_TRANSITIONS=256} [2024-06-14 13:52:31,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-14 13:52:31,598 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 256 transitions, 3756 flow [2024-06-14 13:52:31,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:31,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:31,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:52:31,599 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:31,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2031313379, now seen corresponding path program 2 times [2024-06-14 13:52:31,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:31,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570381318] [2024-06-14 13:52:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:31,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:31,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:31,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570381318] [2024-06-14 13:52:31,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570381318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:31,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:31,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307995009] [2024-06-14 13:52:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:31,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:31,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 256 transitions, 3756 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:31,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:31,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:32,282 INFO L124 PetriNetUnfolderBase]: 1667/2852 cut-off events. [2024-06-14 13:52:32,282 INFO L125 PetriNetUnfolderBase]: For 107436/107439 co-relation queries the response was YES. [2024-06-14 13:52:32,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18269 conditions, 2852 events. 1667/2852 cut-off events. For 107436/107439 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17109 event pairs, 367 based on Foata normal form. 1/2846 useless extension candidates. Maximal degree in co-relation 18176. Up to 2432 conditions per place. [2024-06-14 13:52:32,307 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 70 changer transitions 0/279 dead transitions. [2024-06-14 13:52:32,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 279 transitions, 4567 flow [2024-06-14 13:52:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:52:32,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 13:52:32,309 INFO L175 Difference]: Start difference. First operand has 198 places, 256 transitions, 3756 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:52:32,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 279 transitions, 4567 flow [2024-06-14 13:52:32,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 279 transitions, 4303 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:32,499 INFO L231 Difference]: Finished difference. Result has 202 places, 259 transitions, 3685 flow [2024-06-14 13:52:32,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3685, PETRI_PLACES=202, PETRI_TRANSITIONS=259} [2024-06-14 13:52:32,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-14 13:52:32,500 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 259 transitions, 3685 flow [2024-06-14 13:52:32,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:32,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:32,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:52:32,501 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:32,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1149702905, now seen corresponding path program 1 times [2024-06-14 13:52:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:32,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049567495] [2024-06-14 13:52:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:32,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:32,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049567495] [2024-06-14 13:52:32,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049567495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:32,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:32,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219249865] [2024-06-14 13:52:32,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:32,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:32,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 259 transitions, 3685 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:32,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:32,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:33,140 INFO L124 PetriNetUnfolderBase]: 1619/2803 cut-off events. [2024-06-14 13:52:33,140 INFO L125 PetriNetUnfolderBase]: For 118250/118250 co-relation queries the response was YES. [2024-06-14 13:52:33,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17927 conditions, 2803 events. 1619/2803 cut-off events. For 118250/118250 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17014 event pairs, 339 based on Foata normal form. 10/2786 useless extension candidates. Maximal degree in co-relation 17833. Up to 2275 conditions per place. [2024-06-14 13:52:33,166 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 192 selfloop transitions, 37 changer transitions 0/281 dead transitions. [2024-06-14 13:52:33,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 281 transitions, 4227 flow [2024-06-14 13:52:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:52:33,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-14 13:52:33,167 INFO L175 Difference]: Start difference. First operand has 202 places, 259 transitions, 3685 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:52:33,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 281 transitions, 4227 flow [2024-06-14 13:52:33,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 281 transitions, 4103 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:33,372 INFO L231 Difference]: Finished difference. Result has 205 places, 260 transitions, 3657 flow [2024-06-14 13:52:33,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3561, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3657, PETRI_PLACES=205, PETRI_TRANSITIONS=260} [2024-06-14 13:52:33,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-14 13:52:33,373 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 260 transitions, 3657 flow [2024-06-14 13:52:33,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:33,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:33,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:52:33,373 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:33,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1169016253, now seen corresponding path program 3 times [2024-06-14 13:52:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:33,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149020138] [2024-06-14 13:52:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:33,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:33,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:33,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149020138] [2024-06-14 13:52:33,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149020138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:33,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:33,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:33,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051653790] [2024-06-14 13:52:33,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:33,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:33,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:33,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:33,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 260 transitions, 3657 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:33,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:33,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,071 INFO L124 PetriNetUnfolderBase]: 1700/2908 cut-off events. [2024-06-14 13:52:34,072 INFO L125 PetriNetUnfolderBase]: For 114178/114178 co-relation queries the response was YES. [2024-06-14 13:52:34,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18451 conditions, 2908 events. 1700/2908 cut-off events. For 114178/114178 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17543 event pairs, 364 based on Foata normal form. 1/2903 useless extension candidates. Maximal degree in co-relation 18355. Up to 2485 conditions per place. [2024-06-14 13:52:34,094 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 205 selfloop transitions, 66 changer transitions 0/278 dead transitions. [2024-06-14 13:52:34,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 278 transitions, 4333 flow [2024-06-14 13:52:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:52:34,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-14 13:52:34,095 INFO L175 Difference]: Start difference. First operand has 205 places, 260 transitions, 3657 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:52:34,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 278 transitions, 4333 flow [2024-06-14 13:52:34,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 278 transitions, 4247 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:34,284 INFO L231 Difference]: Finished difference. Result has 207 places, 260 transitions, 3709 flow [2024-06-14 13:52:34,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3571, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3709, PETRI_PLACES=207, PETRI_TRANSITIONS=260} [2024-06-14 13:52:34,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-14 13:52:34,285 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 260 transitions, 3709 flow [2024-06-14 13:52:34,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:34,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:34,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:52:34,285 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:34,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:34,285 INFO L85 PathProgramCache]: Analyzing trace with hash -301620279, now seen corresponding path program 4 times [2024-06-14 13:52:34,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:34,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803176679] [2024-06-14 13:52:34,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:34,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:34,510 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 13:52:34,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:34,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803176679] [2024-06-14 13:52:34,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803176679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:34,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:34,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:34,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185765883] [2024-06-14 13:52:34,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:34,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:34,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:34,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:34,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:34,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 260 transitions, 3709 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:34,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:34,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,920 INFO L124 PetriNetUnfolderBase]: 1694/2896 cut-off events. [2024-06-14 13:52:34,920 INFO L125 PetriNetUnfolderBase]: For 117985/117985 co-relation queries the response was YES. [2024-06-14 13:52:34,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18464 conditions, 2896 events. 1694/2896 cut-off events. For 117985/117985 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17514 event pairs, 363 based on Foata normal form. 2/2892 useless extension candidates. Maximal degree in co-relation 18367. Up to 2333 conditions per place. [2024-06-14 13:52:34,945 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 127 changer transitions 0/279 dead transitions. [2024-06-14 13:52:34,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 279 transitions, 4483 flow [2024-06-14 13:52:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:52:34,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-14 13:52:34,947 INFO L175 Difference]: Start difference. First operand has 207 places, 260 transitions, 3709 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:52:34,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 279 transitions, 4483 flow [2024-06-14 13:52:35,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 279 transitions, 4309 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:35,185 INFO L231 Difference]: Finished difference. Result has 208 places, 260 transitions, 3796 flow [2024-06-14 13:52:35,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3796, PETRI_PLACES=208, PETRI_TRANSITIONS=260} [2024-06-14 13:52:35,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-14 13:52:35,185 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 260 transitions, 3796 flow [2024-06-14 13:52:35,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:35,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:35,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:52:35,186 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:35,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash -294232545, now seen corresponding path program 4 times [2024-06-14 13:52:35,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:35,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637719700] [2024-06-14 13:52:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:35,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:35,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637719700] [2024-06-14 13:52:35,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637719700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:35,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:35,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:35,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204738899] [2024-06-14 13:52:35,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:35,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:35,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:35,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:35,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 260 transitions, 3796 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:35,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:35,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:35,941 INFO L124 PetriNetUnfolderBase]: 1691/2894 cut-off events. [2024-06-14 13:52:35,941 INFO L125 PetriNetUnfolderBase]: For 120488/120488 co-relation queries the response was YES. [2024-06-14 13:52:35,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18635 conditions, 2894 events. 1691/2894 cut-off events. For 120488/120488 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17448 event pairs, 364 based on Foata normal form. 1/2889 useless extension candidates. Maximal degree in co-relation 18538. Up to 2474 conditions per place. [2024-06-14 13:52:35,973 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 70 changer transitions 0/277 dead transitions. [2024-06-14 13:52:35,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 277 transitions, 4378 flow [2024-06-14 13:52:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:52:35,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 13:52:35,974 INFO L175 Difference]: Start difference. First operand has 208 places, 260 transitions, 3796 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:52:35,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 277 transitions, 4378 flow [2024-06-14 13:52:36,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 277 transitions, 4015 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:36,227 INFO L231 Difference]: Finished difference. Result has 209 places, 260 transitions, 3579 flow [2024-06-14 13:52:36,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3433, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3579, PETRI_PLACES=209, PETRI_TRANSITIONS=260} [2024-06-14 13:52:36,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 13:52:36,228 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 260 transitions, 3579 flow [2024-06-14 13:52:36,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:36,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:36,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:52:36,229 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:36,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 82164681, now seen corresponding path program 5 times [2024-06-14 13:52:36,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:36,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665790695] [2024-06-14 13:52:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:36,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:36,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665790695] [2024-06-14 13:52:36,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665790695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:36,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:36,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:36,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643063404] [2024-06-14 13:52:36,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:36,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:36,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:36,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:36,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:36,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:36,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 260 transitions, 3579 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:36,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:36,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:36,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:36,898 INFO L124 PetriNetUnfolderBase]: 1693/2904 cut-off events. [2024-06-14 13:52:36,898 INFO L125 PetriNetUnfolderBase]: For 121894/121894 co-relation queries the response was YES. [2024-06-14 13:52:36,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18498 conditions, 2904 events. 1693/2904 cut-off events. For 121894/121894 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 17521 event pairs, 355 based on Foata normal form. 2/2903 useless extension candidates. Maximal degree in co-relation 18400. Up to 2552 conditions per place. [2024-06-14 13:52:36,926 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 50 changer transitions 0/281 dead transitions. [2024-06-14 13:52:36,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 281 transitions, 4427 flow [2024-06-14 13:52:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:52:36,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 13:52:36,927 INFO L175 Difference]: Start difference. First operand has 209 places, 260 transitions, 3579 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:52:36,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 281 transitions, 4427 flow [2024-06-14 13:52:37,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 281 transitions, 4273 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:37,140 INFO L231 Difference]: Finished difference. Result has 212 places, 263 transitions, 3592 flow [2024-06-14 13:52:37,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3427, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3592, PETRI_PLACES=212, PETRI_TRANSITIONS=263} [2024-06-14 13:52:37,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-14 13:52:37,141 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 263 transitions, 3592 flow [2024-06-14 13:52:37,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:37,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:37,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:52:37,142 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:37,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1269893539, now seen corresponding path program 6 times [2024-06-14 13:52:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:37,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339056040] [2024-06-14 13:52:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:37,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:37,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339056040] [2024-06-14 13:52:37,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339056040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:37,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:37,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:37,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953045567] [2024-06-14 13:52:37,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:37,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:37,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:37,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:37,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 263 transitions, 3592 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:37,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:37,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:37,818 INFO L124 PetriNetUnfolderBase]: 1695/2909 cut-off events. [2024-06-14 13:52:37,818 INFO L125 PetriNetUnfolderBase]: For 124840/124840 co-relation queries the response was YES. [2024-06-14 13:52:37,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18502 conditions, 2909 events. 1695/2909 cut-off events. For 124840/124840 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17577 event pairs, 355 based on Foata normal form. 2/2908 useless extension candidates. Maximal degree in co-relation 18403. Up to 2418 conditions per place. [2024-06-14 13:52:37,844 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 104 changer transitions 0/295 dead transitions. [2024-06-14 13:52:37,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 295 transitions, 4497 flow [2024-06-14 13:52:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 13:52:37,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 13:52:37,845 INFO L175 Difference]: Start difference. First operand has 212 places, 263 transitions, 3592 flow. Second operand 8 states and 198 transitions. [2024-06-14 13:52:37,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 295 transitions, 4497 flow [2024-06-14 13:52:38,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 295 transitions, 4365 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:38,120 INFO L231 Difference]: Finished difference. Result has 214 places, 266 transitions, 3741 flow [2024-06-14 13:52:38,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3741, PETRI_PLACES=214, PETRI_TRANSITIONS=266} [2024-06-14 13:52:38,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-14 13:52:38,121 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 266 transitions, 3741 flow [2024-06-14 13:52:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:38,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:38,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:38,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:52:38,121 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:38,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:38,121 INFO L85 PathProgramCache]: Analyzing trace with hash 246553895, now seen corresponding path program 7 times [2024-06-14 13:52:38,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:38,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349580624] [2024-06-14 13:52:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:38,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:38,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349580624] [2024-06-14 13:52:38,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349580624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:38,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:38,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533279347] [2024-06-14 13:52:38,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:38,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:38,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:38,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:38,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 266 transitions, 3741 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:38,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:38,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:38,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:38,783 INFO L124 PetriNetUnfolderBase]: 1700/2917 cut-off events. [2024-06-14 13:52:38,783 INFO L125 PetriNetUnfolderBase]: For 129304/129307 co-relation queries the response was YES. [2024-06-14 13:52:38,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18831 conditions, 2917 events. 1700/2917 cut-off events. For 129304/129307 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17657 event pairs, 362 based on Foata normal form. 3/2916 useless extension candidates. Maximal degree in co-relation 18731. Up to 2422 conditions per place. [2024-06-14 13:52:38,809 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 107 changer transitions 0/295 dead transitions. [2024-06-14 13:52:38,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 295 transitions, 4745 flow [2024-06-14 13:52:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:52:38,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 13:52:38,811 INFO L175 Difference]: Start difference. First operand has 214 places, 266 transitions, 3741 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:52:38,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 295 transitions, 4745 flow [2024-06-14 13:52:39,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 295 transitions, 4583 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:39,078 INFO L231 Difference]: Finished difference. Result has 216 places, 269 transitions, 3869 flow [2024-06-14 13:52:39,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3869, PETRI_PLACES=216, PETRI_TRANSITIONS=269} [2024-06-14 13:52:39,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-14 13:52:39,078 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 269 transitions, 3869 flow [2024-06-14 13:52:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:39,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:39,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:52:39,079 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:39,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 246791045, now seen corresponding path program 8 times [2024-06-14 13:52:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:39,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690980150] [2024-06-14 13:52:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:39,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:39,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690980150] [2024-06-14 13:52:39,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690980150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:39,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:39,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:39,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835126914] [2024-06-14 13:52:39,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:39,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:39,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:39,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:39,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:39,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:39,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 269 transitions, 3869 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:39,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:39,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:39,756 INFO L124 PetriNetUnfolderBase]: 1697/2913 cut-off events. [2024-06-14 13:52:39,756 INFO L125 PetriNetUnfolderBase]: For 128703/128706 co-relation queries the response was YES. [2024-06-14 13:52:39,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18750 conditions, 2913 events. 1697/2913 cut-off events. For 128703/128706 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17597 event pairs, 362 based on Foata normal form. 3/2912 useless extension candidates. Maximal degree in co-relation 18650. Up to 2420 conditions per place. [2024-06-14 13:52:39,783 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 107 changer transitions 0/291 dead transitions. [2024-06-14 13:52:39,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 291 transitions, 4691 flow [2024-06-14 13:52:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 13:52:39,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-14 13:52:39,784 INFO L175 Difference]: Start difference. First operand has 216 places, 269 transitions, 3869 flow. Second operand 7 states and 172 transitions. [2024-06-14 13:52:39,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 291 transitions, 4691 flow [2024-06-14 13:52:40,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 291 transitions, 4296 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:40,031 INFO L231 Difference]: Finished difference. Result has 216 places, 269 transitions, 3694 flow [2024-06-14 13:52:40,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3694, PETRI_PLACES=216, PETRI_TRANSITIONS=269} [2024-06-14 13:52:40,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-14 13:52:40,032 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 269 transitions, 3694 flow [2024-06-14 13:52:40,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:40,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:40,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:40,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:52:40,032 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:40,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:40,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1000205959, now seen corresponding path program 2 times [2024-06-14 13:52:40,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:40,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633124389] [2024-06-14 13:52:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:40,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:40,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:40,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633124389] [2024-06-14 13:52:40,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633124389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:40,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:40,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:40,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024188321] [2024-06-14 13:52:40,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:40,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:40,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:40,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:40,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 269 transitions, 3694 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:40,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:40,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:40,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:40,713 INFO L124 PetriNetUnfolderBase]: 1650/2862 cut-off events. [2024-06-14 13:52:40,713 INFO L125 PetriNetUnfolderBase]: For 145981/145981 co-relation queries the response was YES. [2024-06-14 13:52:40,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18477 conditions, 2862 events. 1650/2862 cut-off events. For 145981/145981 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 17519 event pairs, 263 based on Foata normal form. 11/2844 useless extension candidates. Maximal degree in co-relation 18376. Up to 2311 conditions per place. [2024-06-14 13:52:40,740 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 211 selfloop transitions, 27 changer transitions 0/293 dead transitions. [2024-06-14 13:52:40,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 293 transitions, 4266 flow [2024-06-14 13:52:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-14 13:52:40,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-14 13:52:40,741 INFO L175 Difference]: Start difference. First operand has 216 places, 269 transitions, 3694 flow. Second operand 5 states and 134 transitions. [2024-06-14 13:52:40,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 293 transitions, 4266 flow [2024-06-14 13:52:40,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 293 transitions, 3992 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:40,980 INFO L231 Difference]: Finished difference. Result has 215 places, 271 transitions, 3511 flow [2024-06-14 13:52:40,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3511, PETRI_PLACES=215, PETRI_TRANSITIONS=271} [2024-06-14 13:52:40,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-14 13:52:40,981 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 271 transitions, 3511 flow [2024-06-14 13:52:40,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:40,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:40,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:40,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:52:40,981 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:40,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash 690133763, now seen corresponding path program 3 times [2024-06-14 13:52:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:40,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83734603] [2024-06-14 13:52:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:40,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:41,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83734603] [2024-06-14 13:52:41,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83734603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:41,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:41,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:41,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049178013] [2024-06-14 13:52:41,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:41,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:41,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:41,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:41,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:41,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:41,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 271 transitions, 3511 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:41,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:41,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:41,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:41,681 INFO L124 PetriNetUnfolderBase]: 1676/2910 cut-off events. [2024-06-14 13:52:41,682 INFO L125 PetriNetUnfolderBase]: For 144500/144500 co-relation queries the response was YES. [2024-06-14 13:52:41,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18613 conditions, 2910 events. 1676/2910 cut-off events. For 144500/144500 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17915 event pairs, 259 based on Foata normal form. 8/2892 useless extension candidates. Maximal degree in co-relation 18512. Up to 2321 conditions per place. [2024-06-14 13:52:41,709 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 213 selfloop transitions, 30 changer transitions 0/298 dead transitions. [2024-06-14 13:52:41,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 298 transitions, 4107 flow [2024-06-14 13:52:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 13:52:41,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-14 13:52:41,710 INFO L175 Difference]: Start difference. First operand has 215 places, 271 transitions, 3511 flow. Second operand 6 states and 155 transitions. [2024-06-14 13:52:41,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 298 transitions, 4107 flow [2024-06-14 13:52:41,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 298 transitions, 4052 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:41,964 INFO L231 Difference]: Finished difference. Result has 218 places, 272 transitions, 3540 flow [2024-06-14 13:52:41,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3540, PETRI_PLACES=218, PETRI_TRANSITIONS=272} [2024-06-14 13:52:41,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 13:52:41,964 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 272 transitions, 3540 flow [2024-06-14 13:52:41,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:41,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:41,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:41,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:52:41,965 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:41,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash 246799973, now seen corresponding path program 4 times [2024-06-14 13:52:41,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:41,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935107580] [2024-06-14 13:52:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:41,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:42,209 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 13:52:42,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:42,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935107580] [2024-06-14 13:52:42,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935107580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:42,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:42,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:42,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778072648] [2024-06-14 13:52:42,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:42,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:42,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 13:52:42,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 272 transitions, 3540 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:42,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:42,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 13:52:42,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:42,636 INFO L124 PetriNetUnfolderBase]: 1686/2928 cut-off events. [2024-06-14 13:52:42,636 INFO L125 PetriNetUnfolderBase]: For 142324/142324 co-relation queries the response was YES. [2024-06-14 13:52:42,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18502 conditions, 2928 events. 1686/2928 cut-off events. For 142324/142324 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17961 event pairs, 347 based on Foata normal form. 10/2912 useless extension candidates. Maximal degree in co-relation 18400. Up to 2398 conditions per place. [2024-06-14 13:52:42,664 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 209 selfloop transitions, 29 changer transitions 0/293 dead transitions. [2024-06-14 13:52:42,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 293 transitions, 4102 flow [2024-06-14 13:52:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:52:42,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 13:52:42,665 INFO L175 Difference]: Start difference. First operand has 218 places, 272 transitions, 3540 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:52:42,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 293 transitions, 4102 flow [2024-06-14 13:52:42,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 293 transitions, 4036 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:42,943 INFO L231 Difference]: Finished difference. Result has 220 places, 273 transitions, 3558 flow [2024-06-14 13:52:42,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3558, PETRI_PLACES=220, PETRI_TRANSITIONS=273} [2024-06-14 13:52:42,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 13:52:42,943 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 273 transitions, 3558 flow [2024-06-14 13:52:42,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:42,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:42,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:42,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:52:42,944 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:42,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash -35706805, now seen corresponding path program 1 times [2024-06-14 13:52:42,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:42,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743094127] [2024-06-14 13:52:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:42,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:43,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:43,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743094127] [2024-06-14 13:52:43,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743094127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:43,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:43,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184112426] [2024-06-14 13:52:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:43,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:43,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 273 transitions, 3558 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:43,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:43,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:43,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:43,620 INFO L124 PetriNetUnfolderBase]: 1808/3093 cut-off events. [2024-06-14 13:52:43,621 INFO L125 PetriNetUnfolderBase]: For 143293/143293 co-relation queries the response was YES. [2024-06-14 13:52:43,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19481 conditions, 3093 events. 1808/3093 cut-off events. For 143293/143293 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18894 event pairs, 316 based on Foata normal form. 4/3091 useless extension candidates. Maximal degree in co-relation 19378. Up to 2572 conditions per place. [2024-06-14 13:52:43,651 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 78 changer transitions 0/302 dead transitions. [2024-06-14 13:52:43,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 302 transitions, 4386 flow [2024-06-14 13:52:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:52:43,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-14 13:52:43,652 INFO L175 Difference]: Start difference. First operand has 220 places, 273 transitions, 3558 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:52:43,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 302 transitions, 4386 flow [2024-06-14 13:52:43,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 302 transitions, 4324 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:43,933 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 3740 flow [2024-06-14 13:52:43,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3740, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-06-14 13:52:43,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-14 13:52:43,934 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 3740 flow [2024-06-14 13:52:43,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:43,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:43,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:43,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:52:43,934 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:43,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash -32849845, now seen corresponding path program 2 times [2024-06-14 13:52:43,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:43,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375216065] [2024-06-14 13:52:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:43,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:44,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:44,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375216065] [2024-06-14 13:52:44,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375216065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:44,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:44,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:44,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814232057] [2024-06-14 13:52:44,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:44,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:44,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:44,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:44,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 3740 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:44,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:44,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:44,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:44,620 INFO L124 PetriNetUnfolderBase]: 1824/3114 cut-off events. [2024-06-14 13:52:44,620 INFO L125 PetriNetUnfolderBase]: For 149235/149235 co-relation queries the response was YES. [2024-06-14 13:52:44,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19963 conditions, 3114 events. 1824/3114 cut-off events. For 149235/149235 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19011 event pairs, 373 based on Foata normal form. 4/3112 useless extension candidates. Maximal degree in co-relation 19859. Up to 2668 conditions per place. [2024-06-14 13:52:44,650 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 220 selfloop transitions, 73 changer transitions 0/300 dead transitions. [2024-06-14 13:52:44,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 300 transitions, 4414 flow [2024-06-14 13:52:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:52:44,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-14 13:52:44,651 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 3740 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:52:44,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 300 transitions, 4414 flow [2024-06-14 13:52:44,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 300 transitions, 4277 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:44,934 INFO L231 Difference]: Finished difference. Result has 228 places, 282 transitions, 3805 flow [2024-06-14 13:52:44,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3805, PETRI_PLACES=228, PETRI_TRANSITIONS=282} [2024-06-14 13:52:44,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-14 13:52:44,934 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 282 transitions, 3805 flow [2024-06-14 13:52:44,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:44,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:44,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:44,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:52:44,935 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:44,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash 82441325, now seen corresponding path program 3 times [2024-06-14 13:52:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:44,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43865154] [2024-06-14 13:52:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:44,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43865154] [2024-06-14 13:52:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43865154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:45,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449144721] [2024-06-14 13:52:45,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:45,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:45,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:45,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 282 transitions, 3805 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:45,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:45,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:45,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:45,665 INFO L124 PetriNetUnfolderBase]: 1896/3231 cut-off events. [2024-06-14 13:52:45,666 INFO L125 PetriNetUnfolderBase]: For 179351/179351 co-relation queries the response was YES. [2024-06-14 13:52:45,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20714 conditions, 3231 events. 1896/3231 cut-off events. For 179351/179351 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19796 event pairs, 373 based on Foata normal form. 20/3248 useless extension candidates. Maximal degree in co-relation 20607. Up to 2811 conditions per place. [2024-06-14 13:52:45,699 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 42 changer transitions 0/307 dead transitions. [2024-06-14 13:52:45,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 307 transitions, 4548 flow [2024-06-14 13:52:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:52:45,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-14 13:52:45,700 INFO L175 Difference]: Start difference. First operand has 228 places, 282 transitions, 3805 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:52:45,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 307 transitions, 4548 flow [2024-06-14 13:52:46,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 307 transitions, 4386 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:46,025 INFO L231 Difference]: Finished difference. Result has 231 places, 287 transitions, 3819 flow [2024-06-14 13:52:46,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3819, PETRI_PLACES=231, PETRI_TRANSITIONS=287} [2024-06-14 13:52:46,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-14 13:52:46,025 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 287 transitions, 3819 flow [2024-06-14 13:52:46,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:46,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:46,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:46,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:52:46,026 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:46,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1492879661, now seen corresponding path program 1 times [2024-06-14 13:52:46,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:46,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438063157] [2024-06-14 13:52:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:46,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:46,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438063157] [2024-06-14 13:52:46,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438063157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:46,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:46,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:46,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047120589] [2024-06-14 13:52:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:46,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:46,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:46,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:46,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 287 transitions, 3819 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:46,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:46,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:46,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:46,756 INFO L124 PetriNetUnfolderBase]: 1904/3243 cut-off events. [2024-06-14 13:52:46,756 INFO L125 PetriNetUnfolderBase]: For 157211/157211 co-relation queries the response was YES. [2024-06-14 13:52:46,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20929 conditions, 3243 events. 1904/3243 cut-off events. For 157211/157211 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19846 event pairs, 373 based on Foata normal form. 2/3242 useless extension candidates. Maximal degree in co-relation 20821. Up to 2917 conditions per place. [2024-06-14 13:52:46,786 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 274 selfloop transitions, 24 changer transitions 0/305 dead transitions. [2024-06-14 13:52:46,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 305 transitions, 4496 flow [2024-06-14 13:52:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:52:46,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-06-14 13:52:46,787 INFO L175 Difference]: Start difference. First operand has 231 places, 287 transitions, 3819 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:52:46,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 305 transitions, 4496 flow [2024-06-14 13:52:47,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 305 transitions, 4388 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:47,137 INFO L231 Difference]: Finished difference. Result has 233 places, 290 transitions, 3819 flow [2024-06-14 13:52:47,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3711, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3819, PETRI_PLACES=233, PETRI_TRANSITIONS=290} [2024-06-14 13:52:47,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 13:52:47,138 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 290 transitions, 3819 flow [2024-06-14 13:52:47,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:47,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:47,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:52:47,138 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:47,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash 453483979, now seen corresponding path program 4 times [2024-06-14 13:52:47,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:47,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578813002] [2024-06-14 13:52:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:47,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:47,387 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 13:52:47,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:47,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578813002] [2024-06-14 13:52:47,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578813002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:47,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:47,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:47,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221486810] [2024-06-14 13:52:47,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:47,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:47,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:47,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:47,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:47,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:47,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 290 transitions, 3819 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:47,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:47,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:47,898 INFO L124 PetriNetUnfolderBase]: 1963/3341 cut-off events. [2024-06-14 13:52:47,898 INFO L125 PetriNetUnfolderBase]: For 189420/189420 co-relation queries the response was YES. [2024-06-14 13:52:47,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21348 conditions, 3341 events. 1963/3341 cut-off events. For 189420/189420 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20543 event pairs, 323 based on Foata normal form. 20/3358 useless extension candidates. Maximal degree in co-relation 21238. Up to 2699 conditions per place. [2024-06-14 13:52:47,929 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 230 selfloop transitions, 91 changer transitions 0/328 dead transitions. [2024-06-14 13:52:47,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 328 transitions, 4627 flow [2024-06-14 13:52:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 13:52:47,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 13:52:47,931 INFO L175 Difference]: Start difference. First operand has 233 places, 290 transitions, 3819 flow. Second operand 8 states and 202 transitions. [2024-06-14 13:52:47,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 328 transitions, 4627 flow [2024-06-14 13:52:48,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 328 transitions, 4548 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:48,275 INFO L231 Difference]: Finished difference. Result has 237 places, 294 transitions, 4016 flow [2024-06-14 13:52:48,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4016, PETRI_PLACES=237, PETRI_TRANSITIONS=294} [2024-06-14 13:52:48,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-14 13:52:48,276 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 294 transitions, 4016 flow [2024-06-14 13:52:48,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:48,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:48,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:48,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:52:48,276 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:48,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 2 times [2024-06-14 13:52:48,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:48,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004461930] [2024-06-14 13:52:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:48,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:48,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:48,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004461930] [2024-06-14 13:52:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004461930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:48,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:48,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:48,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749285350] [2024-06-14 13:52:48,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:48,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:48,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:48,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:48,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 294 transitions, 4016 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:48,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:48,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:48,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:48,998 INFO L124 PetriNetUnfolderBase]: 1976/3355 cut-off events. [2024-06-14 13:52:48,998 INFO L125 PetriNetUnfolderBase]: For 167127/167127 co-relation queries the response was YES. [2024-06-14 13:52:49,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22057 conditions, 3355 events. 1976/3355 cut-off events. For 167127/167127 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20604 event pairs, 380 based on Foata normal form. 2/3354 useless extension candidates. Maximal degree in co-relation 21946. Up to 3022 conditions per place. [2024-06-14 13:52:49,031 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 277 selfloop transitions, 29 changer transitions 0/313 dead transitions. [2024-06-14 13:52:49,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 313 transitions, 4747 flow [2024-06-14 13:52:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 13:52:49,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 13:52:49,032 INFO L175 Difference]: Start difference. First operand has 237 places, 294 transitions, 4016 flow. Second operand 6 states and 138 transitions. [2024-06-14 13:52:49,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 313 transitions, 4747 flow [2024-06-14 13:52:49,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 313 transitions, 4575 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:49,377 INFO L231 Difference]: Finished difference. Result has 238 places, 299 transitions, 3999 flow [2024-06-14 13:52:49,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3999, PETRI_PLACES=238, PETRI_TRANSITIONS=299} [2024-06-14 13:52:49,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-14 13:52:49,377 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 299 transitions, 3999 flow [2024-06-14 13:52:49,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:49,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:49,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:52:49,378 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:49,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:49,378 INFO L85 PathProgramCache]: Analyzing trace with hash 619181531, now seen corresponding path program 3 times [2024-06-14 13:52:49,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:49,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433992425] [2024-06-14 13:52:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:49,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:49,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:49,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433992425] [2024-06-14 13:52:49,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433992425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:49,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:49,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:49,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546263989] [2024-06-14 13:52:49,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:49,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:49,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:49,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:49,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 299 transitions, 3999 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:49,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:49,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:50,123 INFO L124 PetriNetUnfolderBase]: 1984/3367 cut-off events. [2024-06-14 13:52:50,124 INFO L125 PetriNetUnfolderBase]: For 166109/166109 co-relation queries the response was YES. [2024-06-14 13:52:50,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21810 conditions, 3367 events. 1984/3367 cut-off events. For 166109/166109 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20660 event pairs, 382 based on Foata normal form. 2/3366 useless extension candidates. Maximal degree in co-relation 21698. Up to 3028 conditions per place. [2024-06-14 13:52:50,160 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 278 selfloop transitions, 29 changer transitions 0/314 dead transitions. [2024-06-14 13:52:50,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 314 transitions, 4689 flow [2024-06-14 13:52:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:52:50,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:52:50,161 INFO L175 Difference]: Start difference. First operand has 238 places, 299 transitions, 3999 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:52:50,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 314 transitions, 4689 flow [2024-06-14 13:52:50,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 314 transitions, 4613 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:50,501 INFO L231 Difference]: Finished difference. Result has 241 places, 301 transitions, 4040 flow [2024-06-14 13:52:50,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4040, PETRI_PLACES=241, PETRI_TRANSITIONS=301} [2024-06-14 13:52:50,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-14 13:52:50,502 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 301 transitions, 4040 flow [2024-06-14 13:52:50,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:50,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:50,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:50,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:52:50,502 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:50,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:50,503 INFO L85 PathProgramCache]: Analyzing trace with hash 690140707, now seen corresponding path program 4 times [2024-06-14 13:52:50,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:50,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638007990] [2024-06-14 13:52:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:50,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:50,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638007990] [2024-06-14 13:52:50,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638007990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:50,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:50,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543154555] [2024-06-14 13:52:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:50,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:50,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:50,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 301 transitions, 4040 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:50,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:50,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:50,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:51,233 INFO L124 PetriNetUnfolderBase]: 1979/3359 cut-off events. [2024-06-14 13:52:51,233 INFO L125 PetriNetUnfolderBase]: For 163060/163063 co-relation queries the response was YES. [2024-06-14 13:52:51,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21609 conditions, 3359 events. 1979/3359 cut-off events. For 163060/163063 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20613 event pairs, 380 based on Foata normal form. 4/3359 useless extension candidates. Maximal degree in co-relation 21496. Up to 3007 conditions per place. [2024-06-14 13:52:51,265 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 277 selfloop transitions, 30 changer transitions 0/314 dead transitions. [2024-06-14 13:52:51,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 314 transitions, 4724 flow [2024-06-14 13:52:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-14 13:52:51,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-14 13:52:51,266 INFO L175 Difference]: Start difference. First operand has 241 places, 301 transitions, 4040 flow. Second operand 5 states and 117 transitions. [2024-06-14 13:52:51,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 314 transitions, 4724 flow [2024-06-14 13:52:51,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 314 transitions, 4633 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:51,665 INFO L231 Difference]: Finished difference. Result has 243 places, 303 transitions, 4062 flow [2024-06-14 13:52:51,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4062, PETRI_PLACES=243, PETRI_TRANSITIONS=303} [2024-06-14 13:52:51,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-14 13:52:51,666 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 303 transitions, 4062 flow [2024-06-14 13:52:51,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:51,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:51,666 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] [2024-06-14 13:52:51,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:52:51,666 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:51,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash -430236843, now seen corresponding path program 1 times [2024-06-14 13:52:51,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:51,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330597461] [2024-06-14 13:52:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:51,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:51,934 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 13:52:51,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:51,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330597461] [2024-06-14 13:52:51,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330597461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:51,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:51,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:51,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934043212] [2024-06-14 13:52:51,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:51,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:51,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:51,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:51,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:51,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:51,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 303 transitions, 4062 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:51,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:51,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:51,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:52,475 INFO L124 PetriNetUnfolderBase]: 1992/3378 cut-off events. [2024-06-14 13:52:52,475 INFO L125 PetriNetUnfolderBase]: For 162441/162441 co-relation queries the response was YES. [2024-06-14 13:52:52,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21744 conditions, 3378 events. 1992/3378 cut-off events. For 162441/162441 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 20711 event pairs, 379 based on Foata normal form. 1/3376 useless extension candidates. Maximal degree in co-relation 21630. Up to 3004 conditions per place. [2024-06-14 13:52:52,511 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 40 changer transitions 0/329 dead transitions. [2024-06-14 13:52:52,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 329 transitions, 4956 flow [2024-06-14 13:52:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:52:52,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 13:52:52,512 INFO L175 Difference]: Start difference. First operand has 243 places, 303 transitions, 4062 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:52:52,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 329 transitions, 4956 flow [2024-06-14 13:52:52,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 329 transitions, 4863 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:52,921 INFO L231 Difference]: Finished difference. Result has 246 places, 309 transitions, 4149 flow [2024-06-14 13:52:52,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4149, PETRI_PLACES=246, PETRI_TRANSITIONS=309} [2024-06-14 13:52:52,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-14 13:52:52,922 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 309 transitions, 4149 flow [2024-06-14 13:52:52,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:52,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:52,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:52:52,923 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:52,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:52,923 INFO L85 PathProgramCache]: Analyzing trace with hash -424522923, now seen corresponding path program 2 times [2024-06-14 13:52:52,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:52,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457537683] [2024-06-14 13:52:52,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:52,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:53,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:53,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457537683] [2024-06-14 13:52:53,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457537683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:53,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:53,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:53,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309786623] [2024-06-14 13:52:53,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:53,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:53,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:53,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:53,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 309 transitions, 4149 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:53,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:53,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:53,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:53,705 INFO L124 PetriNetUnfolderBase]: 1997/3385 cut-off events. [2024-06-14 13:52:53,705 INFO L125 PetriNetUnfolderBase]: For 168224/168224 co-relation queries the response was YES. [2024-06-14 13:52:53,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22078 conditions, 3385 events. 1997/3385 cut-off events. For 168224/168224 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 20774 event pairs, 379 based on Foata normal form. 1/3383 useless extension candidates. Maximal degree in co-relation 21963. Up to 3010 conditions per place. [2024-06-14 13:52:53,737 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 45 changer transitions 0/334 dead transitions. [2024-06-14 13:52:53,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 334 transitions, 5023 flow [2024-06-14 13:52:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:52:53,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-14 13:52:53,738 INFO L175 Difference]: Start difference. First operand has 246 places, 309 transitions, 4149 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:52:53,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 334 transitions, 5023 flow [2024-06-14 13:52:54,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 334 transitions, 4952 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:54,146 INFO L231 Difference]: Finished difference. Result has 251 places, 312 transitions, 4228 flow [2024-06-14 13:52:54,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4228, PETRI_PLACES=251, PETRI_TRANSITIONS=312} [2024-06-14 13:52:54,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-14 13:52:54,147 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 312 transitions, 4228 flow [2024-06-14 13:52:54,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:54,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:54,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:54,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:52:54,148 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:54,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash -149306539, now seen corresponding path program 3 times [2024-06-14 13:52:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:54,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391400920] [2024-06-14 13:52:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:54,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391400920] [2024-06-14 13:52:54,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391400920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:54,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:54,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:54,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200064720] [2024-06-14 13:52:54,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:54,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:54,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:54,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:54,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:54,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:54,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 312 transitions, 4228 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:54,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:54,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:54,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:54,964 INFO L124 PetriNetUnfolderBase]: 2018/3410 cut-off events. [2024-06-14 13:52:54,965 INFO L125 PetriNetUnfolderBase]: For 172917/172920 co-relation queries the response was YES. [2024-06-14 13:52:54,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22476 conditions, 3410 events. 2018/3410 cut-off events. For 172917/172920 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 20904 event pairs, 401 based on Foata normal form. 1/3401 useless extension candidates. Maximal degree in co-relation 22360. Up to 2806 conditions per place. [2024-06-14 13:52:55,003 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 114 changer transitions 0/367 dead transitions. [2024-06-14 13:52:55,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 367 transitions, 5714 flow [2024-06-14 13:52:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 13:52:55,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 13:52:55,005 INFO L175 Difference]: Start difference. First operand has 251 places, 312 transitions, 4228 flow. Second operand 10 states and 245 transitions. [2024-06-14 13:52:55,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 367 transitions, 5714 flow [2024-06-14 13:52:55,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 367 transitions, 5593 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:55,425 INFO L231 Difference]: Finished difference. Result has 255 places, 325 transitions, 4547 flow [2024-06-14 13:52:55,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4115, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4547, PETRI_PLACES=255, PETRI_TRANSITIONS=325} [2024-06-14 13:52:55,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-14 13:52:55,425 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 325 transitions, 4547 flow [2024-06-14 13:52:55,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:55,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:55,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:55,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:52:55,426 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:55,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1810165803, now seen corresponding path program 4 times [2024-06-14 13:52:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:55,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565989053] [2024-06-14 13:52:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:55,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:55,676 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 13:52:55,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:55,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565989053] [2024-06-14 13:52:55,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565989053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:55,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:55,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:55,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643359627] [2024-06-14 13:52:55,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:55,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:55,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:55,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:55,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:55,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:55,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 325 transitions, 4547 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:55,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:55,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:55,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:56,249 INFO L124 PetriNetUnfolderBase]: 2023/3419 cut-off events. [2024-06-14 13:52:56,249 INFO L125 PetriNetUnfolderBase]: For 175798/175801 co-relation queries the response was YES. [2024-06-14 13:52:56,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23110 conditions, 3419 events. 2023/3419 cut-off events. For 175798/175801 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20976 event pairs, 401 based on Foata normal form. 1/3410 useless extension candidates. Maximal degree in co-relation 22994. Up to 2810 conditions per place. [2024-06-14 13:52:56,283 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 119 changer transitions 0/367 dead transitions. [2024-06-14 13:52:56,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 367 transitions, 5771 flow [2024-06-14 13:52:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:52:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:52:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-14 13:52:56,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 13:52:56,285 INFO L175 Difference]: Start difference. First operand has 255 places, 325 transitions, 4547 flow. Second operand 11 states and 258 transitions. [2024-06-14 13:52:56,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 367 transitions, 5771 flow [2024-06-14 13:52:56,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 367 transitions, 5523 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:56,604 INFO L231 Difference]: Finished difference. Result has 262 places, 328 transitions, 4597 flow [2024-06-14 13:52:56,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4597, PETRI_PLACES=262, PETRI_TRANSITIONS=328} [2024-06-14 13:52:56,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-14 13:52:56,605 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 328 transitions, 4597 flow [2024-06-14 13:52:56,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:56,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:56,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:56,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:52:56,605 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:56,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:56,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1288691669, now seen corresponding path program 5 times [2024-06-14 13:52:56,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:56,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897602112] [2024-06-14 13:52:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:56,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:56,858 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 13:52:56,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:56,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897602112] [2024-06-14 13:52:56,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897602112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:56,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:56,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:56,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492431688] [2024-06-14 13:52:56,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:56,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:56,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:56,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:56,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:56,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 328 transitions, 4597 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:56,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:56,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:56,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:57,458 INFO L124 PetriNetUnfolderBase]: 2044/3454 cut-off events. [2024-06-14 13:52:57,458 INFO L125 PetriNetUnfolderBase]: For 183506/183509 co-relation queries the response was YES. [2024-06-14 13:52:57,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23447 conditions, 3454 events. 2044/3454 cut-off events. For 183506/183509 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21186 event pairs, 401 based on Foata normal form. 1/3445 useless extension candidates. Maximal degree in co-relation 23330. Up to 2829 conditions per place. [2024-06-14 13:52:57,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 126 changer transitions 0/368 dead transitions. [2024-06-14 13:52:57,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 368 transitions, 5861 flow [2024-06-14 13:52:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:52:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:52:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-14 13:52:57,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497835497835498 [2024-06-14 13:52:57,495 INFO L175 Difference]: Start difference. First operand has 262 places, 328 transitions, 4597 flow. Second operand 11 states and 254 transitions. [2024-06-14 13:52:57,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 368 transitions, 5861 flow [2024-06-14 13:52:57,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 368 transitions, 5635 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:57,808 INFO L231 Difference]: Finished difference. Result has 267 places, 335 transitions, 4731 flow [2024-06-14 13:52:57,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4731, PETRI_PLACES=267, PETRI_TRANSITIONS=335} [2024-06-14 13:52:57,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-14 13:52:57,809 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 335 transitions, 4731 flow [2024-06-14 13:52:57,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:57,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:57,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:52:57,809 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:57,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:57,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1515900043, now seen corresponding path program 1 times [2024-06-14 13:52:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:57,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487074433] [2024-06-14 13:52:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:57,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:58,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:58,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487074433] [2024-06-14 13:52:58,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487074433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:58,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:58,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:58,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033962402] [2024-06-14 13:52:58,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:58,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:58,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:58,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:58,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:58,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 335 transitions, 4731 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:58,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:58,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:58,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:58,624 INFO L124 PetriNetUnfolderBase]: 2052/3482 cut-off events. [2024-06-14 13:52:58,624 INFO L125 PetriNetUnfolderBase]: For 190250/190250 co-relation queries the response was YES. [2024-06-14 13:52:58,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23648 conditions, 3482 events. 2052/3482 cut-off events. For 190250/190250 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21508 event pairs, 298 based on Foata normal form. 2/3481 useless extension candidates. Maximal degree in co-relation 23530. Up to 3071 conditions per place. [2024-06-14 13:52:58,662 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 328 selfloop transitions, 27 changer transitions 0/362 dead transitions. [2024-06-14 13:52:58,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 362 transitions, 5695 flow [2024-06-14 13:52:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 13:52:58,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-14 13:52:58,663 INFO L175 Difference]: Start difference. First operand has 267 places, 335 transitions, 4731 flow. Second operand 6 states and 145 transitions. [2024-06-14 13:52:58,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 362 transitions, 5695 flow [2024-06-14 13:52:58,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 362 transitions, 5468 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:58,957 INFO L231 Difference]: Finished difference. Result has 267 places, 340 transitions, 4656 flow [2024-06-14 13:52:58,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4656, PETRI_PLACES=267, PETRI_TRANSITIONS=340} [2024-06-14 13:52:58,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-14 13:52:58,957 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 340 transitions, 4656 flow [2024-06-14 13:52:58,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:58,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:58,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:58,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:52:58,958 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:58,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1635754835, now seen corresponding path program 2 times [2024-06-14 13:52:58,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:58,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633460108] [2024-06-14 13:52:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:58,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:59,238 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 13:52:59,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:59,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633460108] [2024-06-14 13:52:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633460108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:59,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:59,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102754454] [2024-06-14 13:52:59,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:59,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:59,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:52:59,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 340 transitions, 4656 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:59,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:59,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:52:59,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:59,786 INFO L124 PetriNetUnfolderBase]: 2047/3475 cut-off events. [2024-06-14 13:52:59,786 INFO L125 PetriNetUnfolderBase]: For 191546/191546 co-relation queries the response was YES. [2024-06-14 13:52:59,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23392 conditions, 3475 events. 2047/3475 cut-off events. For 191546/191546 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21438 event pairs, 376 based on Foata normal form. 2/3474 useless extension candidates. Maximal degree in co-relation 23272. Up to 3111 conditions per place. [2024-06-14 13:52:59,823 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 327 selfloop transitions, 23 changer transitions 0/357 dead transitions. [2024-06-14 13:52:59,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 357 transitions, 5398 flow [2024-06-14 13:52:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:52:59,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 13:52:59,824 INFO L175 Difference]: Start difference. First operand has 267 places, 340 transitions, 4656 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:52:59,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 357 transitions, 5398 flow [2024-06-14 13:53:00,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 357 transitions, 5311 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:00,189 INFO L231 Difference]: Finished difference. Result has 271 places, 340 transitions, 4620 flow [2024-06-14 13:53:00,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4569, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4620, PETRI_PLACES=271, PETRI_TRANSITIONS=340} [2024-06-14 13:53:00,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 13:53:00,190 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 340 transitions, 4620 flow [2024-06-14 13:53:00,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:00,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:00,190 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] [2024-06-14 13:53:00,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:53:00,190 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:00,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:00,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1810178482, now seen corresponding path program 1 times [2024-06-14 13:53:00,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:00,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463646160] [2024-06-14 13:53:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:00,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:00,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:00,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463646160] [2024-06-14 13:53:00,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463646160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:00,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:00,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:00,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401802452] [2024-06-14 13:53:00,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:00,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:00,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:00,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:00,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:00,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 340 transitions, 4620 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:00,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:00,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:00,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:01,043 INFO L124 PetriNetUnfolderBase]: 2052/3478 cut-off events. [2024-06-14 13:53:01,043 INFO L125 PetriNetUnfolderBase]: For 195677/195680 co-relation queries the response was YES. [2024-06-14 13:53:01,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23450 conditions, 3478 events. 2052/3478 cut-off events. For 195677/195680 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21496 event pairs, 416 based on Foata normal form. 1/3469 useless extension candidates. Maximal degree in co-relation 23328. Up to 2875 conditions per place. [2024-06-14 13:53:01,078 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 150 changer transitions 0/366 dead transitions. [2024-06-14 13:53:01,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 366 transitions, 5692 flow [2024-06-14 13:53:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:53:01,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 13:53:01,079 INFO L175 Difference]: Start difference. First operand has 271 places, 340 transitions, 4620 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:53:01,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 366 transitions, 5692 flow [2024-06-14 13:53:01,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 366 transitions, 5650 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:01,454 INFO L231 Difference]: Finished difference. Result has 275 places, 343 transitions, 4930 flow [2024-06-14 13:53:01,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4930, PETRI_PLACES=275, PETRI_TRANSITIONS=343} [2024-06-14 13:53:01,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 13:53:01,455 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 343 transitions, 4930 flow [2024-06-14 13:53:01,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:01,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:01,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:01,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:53:01,455 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:01,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:01,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1096354400, now seen corresponding path program 2 times [2024-06-14 13:53:01,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:01,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050416738] [2024-06-14 13:53:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:01,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050416738] [2024-06-14 13:53:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050416738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:01,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:01,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:01,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5104115] [2024-06-14 13:53:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:01,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:01,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:01,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 343 transitions, 4930 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:01,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:01,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:01,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:02,262 INFO L124 PetriNetUnfolderBase]: 2057/3487 cut-off events. [2024-06-14 13:53:02,262 INFO L125 PetriNetUnfolderBase]: For 203053/203056 co-relation queries the response was YES. [2024-06-14 13:53:02,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23957 conditions, 3487 events. 2057/3487 cut-off events. For 203053/203056 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21553 event pairs, 415 based on Foata normal form. 1/3478 useless extension candidates. Maximal degree in co-relation 23834. Up to 2881 conditions per place. [2024-06-14 13:53:02,303 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 153 changer transitions 0/369 dead transitions. [2024-06-14 13:53:02,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 369 transitions, 6018 flow [2024-06-14 13:53:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:53:02,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 13:53:02,304 INFO L175 Difference]: Start difference. First operand has 275 places, 343 transitions, 4930 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:53:02,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 369 transitions, 6018 flow [2024-06-14 13:53:02,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 369 transitions, 5764 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:02,715 INFO L231 Difference]: Finished difference. Result has 278 places, 346 transitions, 5040 flow [2024-06-14 13:53:02,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5040, PETRI_PLACES=278, PETRI_TRANSITIONS=346} [2024-06-14 13:53:02,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 13:53:02,715 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 346 transitions, 5040 flow [2024-06-14 13:53:02,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:02,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:02,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:02,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:53:02,716 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:02,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1039000996, now seen corresponding path program 3 times [2024-06-14 13:53:02,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:02,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159399155] [2024-06-14 13:53:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:02,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:02,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:02,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159399155] [2024-06-14 13:53:02,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159399155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:02,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:02,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:02,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728978901] [2024-06-14 13:53:02,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:02,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:02,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:02,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:02,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:03,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:03,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 346 transitions, 5040 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:03,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:03,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:03,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:03,639 INFO L124 PetriNetUnfolderBase]: 2070/3509 cut-off events. [2024-06-14 13:53:03,639 INFO L125 PetriNetUnfolderBase]: For 212226/212229 co-relation queries the response was YES. [2024-06-14 13:53:03,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24282 conditions, 3509 events. 2070/3509 cut-off events. For 212226/212229 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21701 event pairs, 417 based on Foata normal form. 1/3500 useless extension candidates. Maximal degree in co-relation 24157. Up to 2896 conditions per place. [2024-06-14 13:53:03,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 208 selfloop transitions, 159 changer transitions 0/374 dead transitions. [2024-06-14 13:53:03,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 374 transitions, 6326 flow [2024-06-14 13:53:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-14 13:53:03,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 13:53:03,679 INFO L175 Difference]: Start difference. First operand has 278 places, 346 transitions, 5040 flow. Second operand 9 states and 207 transitions. [2024-06-14 13:53:03,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 374 transitions, 6326 flow [2024-06-14 13:53:04,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 374 transitions, 5972 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:04,140 INFO L231 Difference]: Finished difference. Result has 281 places, 352 transitions, 5120 flow [2024-06-14 13:53:04,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5120, PETRI_PLACES=281, PETRI_TRANSITIONS=352} [2024-06-14 13:53:04,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-14 13:53:04,140 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 352 transitions, 5120 flow [2024-06-14 13:53:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:04,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:04,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:04,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:53:04,140 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:04,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:04,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1288678990, now seen corresponding path program 4 times [2024-06-14 13:53:04,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:04,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526664141] [2024-06-14 13:53:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:04,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:04,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:04,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526664141] [2024-06-14 13:53:04,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526664141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:04,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:04,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:04,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160451278] [2024-06-14 13:53:04,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:04,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:04,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:04,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:04,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:04,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 352 transitions, 5120 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:04,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:04,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:04,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:04,986 INFO L124 PetriNetUnfolderBase]: 2075/3515 cut-off events. [2024-06-14 13:53:04,986 INFO L125 PetriNetUnfolderBase]: For 218041/218044 co-relation queries the response was YES. [2024-06-14 13:53:05,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24403 conditions, 3515 events. 2075/3515 cut-off events. For 218041/218044 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21767 event pairs, 420 based on Foata normal form. 1/3503 useless extension candidates. Maximal degree in co-relation 24277. Up to 2902 conditions per place. [2024-06-14 13:53:05,027 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 208 selfloop transitions, 160 changer transitions 0/375 dead transitions. [2024-06-14 13:53:05,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 375 transitions, 6223 flow [2024-06-14 13:53:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:53:05,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 13:53:05,028 INFO L175 Difference]: Start difference. First operand has 281 places, 352 transitions, 5120 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:53:05,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 375 transitions, 6223 flow [2024-06-14 13:53:05,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 375 transitions, 5916 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:05,512 INFO L231 Difference]: Finished difference. Result has 284 places, 355 transitions, 5194 flow [2024-06-14 13:53:05,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4838, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5194, PETRI_PLACES=284, PETRI_TRANSITIONS=355} [2024-06-14 13:53:05,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-14 13:53:05,513 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 355 transitions, 5194 flow [2024-06-14 13:53:05,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:05,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:05,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:05,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:53:05,513 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:05,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:05,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1267122556, now seen corresponding path program 5 times [2024-06-14 13:53:05,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:05,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762998238] [2024-06-14 13:53:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:05,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:05,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:05,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762998238] [2024-06-14 13:53:05,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762998238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:05,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:05,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:05,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629573677] [2024-06-14 13:53:05,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:05,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:05,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:05,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:05,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 355 transitions, 5194 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:05,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:05,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:05,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:06,334 INFO L124 PetriNetUnfolderBase]: 2080/3530 cut-off events. [2024-06-14 13:53:06,334 INFO L125 PetriNetUnfolderBase]: For 224994/224997 co-relation queries the response was YES. [2024-06-14 13:53:06,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24516 conditions, 3530 events. 2080/3530 cut-off events. For 224994/224997 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 21892 event pairs, 412 based on Foata normal form. 1/3524 useless extension candidates. Maximal degree in co-relation 24388. Up to 2908 conditions per place. [2024-06-14 13:53:06,373 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 163 changer transitions 0/380 dead transitions. [2024-06-14 13:53:06,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 380 transitions, 6452 flow [2024-06-14 13:53:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 13:53:06,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-14 13:53:06,374 INFO L175 Difference]: Start difference. First operand has 284 places, 355 transitions, 5194 flow. Second operand 9 states and 209 transitions. [2024-06-14 13:53:06,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 380 transitions, 6452 flow [2024-06-14 13:53:06,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 380 transitions, 6212 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:06,881 INFO L231 Difference]: Finished difference. Result has 288 places, 358 transitions, 5344 flow [2024-06-14 13:53:06,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4957, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5344, PETRI_PLACES=288, PETRI_TRANSITIONS=358} [2024-06-14 13:53:06,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-14 13:53:06,884 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 358 transitions, 5344 flow [2024-06-14 13:53:06,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:06,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:06,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:06,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:53:06,884 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:06,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:06,885 INFO L85 PathProgramCache]: Analyzing trace with hash -206065301, now seen corresponding path program 6 times [2024-06-14 13:53:06,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:06,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811393406] [2024-06-14 13:53:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:06,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:07,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811393406] [2024-06-14 13:53:07,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811393406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:07,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:07,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:07,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668034882] [2024-06-14 13:53:07,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:07,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:07,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:07,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:07,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:07,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 358 transitions, 5344 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:07,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:07,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:07,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:07,810 INFO L124 PetriNetUnfolderBase]: 2098/3557 cut-off events. [2024-06-14 13:53:07,811 INFO L125 PetriNetUnfolderBase]: For 236681/236681 co-relation queries the response was YES. [2024-06-14 13:53:07,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24846 conditions, 3557 events. 2098/3557 cut-off events. For 236681/236681 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22106 event pairs, 385 based on Foata normal form. 2/3553 useless extension candidates. Maximal degree in co-relation 24716. Up to 2961 conditions per place. [2024-06-14 13:53:07,850 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 98 changer transitions 0/391 dead transitions. [2024-06-14 13:53:07,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 391 transitions, 6520 flow [2024-06-14 13:53:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 13:53:07,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 13:53:07,851 INFO L175 Difference]: Start difference. First operand has 288 places, 358 transitions, 5344 flow. Second operand 8 states and 193 transitions. [2024-06-14 13:53:07,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 391 transitions, 6520 flow [2024-06-14 13:53:08,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 391 transitions, 5917 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:08,378 INFO L231 Difference]: Finished difference. Result has 288 places, 365 transitions, 5053 flow [2024-06-14 13:53:08,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5053, PETRI_PLACES=288, PETRI_TRANSITIONS=365} [2024-06-14 13:53:08,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-14 13:53:08,378 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 365 transitions, 5053 flow [2024-06-14 13:53:08,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:08,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:08,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:53:08,379 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:08,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash -760305621, now seen corresponding path program 7 times [2024-06-14 13:53:08,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:08,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608601843] [2024-06-14 13:53:08,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:08,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:08,636 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 13:53:08,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:08,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608601843] [2024-06-14 13:53:08,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608601843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:08,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:08,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:08,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973309366] [2024-06-14 13:53:08,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:08,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:08,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:08,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:08,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:08,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:08,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 365 transitions, 5053 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:08,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:08,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:09,241 INFO L124 PetriNetUnfolderBase]: 2092/3550 cut-off events. [2024-06-14 13:53:09,241 INFO L125 PetriNetUnfolderBase]: For 235213/235213 co-relation queries the response was YES. [2024-06-14 13:53:09,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24317 conditions, 3550 events. 2092/3550 cut-off events. For 235213/235213 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 22070 event pairs, 382 based on Foata normal form. 2/3546 useless extension candidates. Maximal degree in co-relation 24187. Up to 2894 conditions per place. [2024-06-14 13:53:09,281 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 119 changer transitions 0/400 dead transitions. [2024-06-14 13:53:09,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 400 transitions, 6201 flow [2024-06-14 13:53:09,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-14 13:53:09,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541125541125541 [2024-06-14 13:53:09,283 INFO L175 Difference]: Start difference. First operand has 288 places, 365 transitions, 5053 flow. Second operand 11 states and 256 transitions. [2024-06-14 13:53:09,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 400 transitions, 6201 flow [2024-06-14 13:53:09,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 400 transitions, 5951 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:09,820 INFO L231 Difference]: Finished difference. Result has 294 places, 365 transitions, 5048 flow [2024-06-14 13:53:09,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4803, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5048, PETRI_PLACES=294, PETRI_TRANSITIONS=365} [2024-06-14 13:53:09,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 13:53:09,821 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 365 transitions, 5048 flow [2024-06-14 13:53:09,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:09,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:09,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:09,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:53:09,821 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:09,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:09,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1747873749, now seen corresponding path program 8 times [2024-06-14 13:53:09,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:09,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088239917] [2024-06-14 13:53:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:09,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:10,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:10,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088239917] [2024-06-14 13:53:10,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088239917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:10,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:10,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:10,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126743410] [2024-06-14 13:53:10,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:10,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:10,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:10,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 365 transitions, 5048 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:10,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:10,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:10,709 INFO L124 PetriNetUnfolderBase]: 2128/3616 cut-off events. [2024-06-14 13:53:10,710 INFO L125 PetriNetUnfolderBase]: For 250702/250702 co-relation queries the response was YES. [2024-06-14 13:53:10,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24813 conditions, 3616 events. 2128/3616 cut-off events. For 250702/250702 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 22535 event pairs, 377 based on Foata normal form. 4/3617 useless extension candidates. Maximal degree in co-relation 24683. Up to 3199 conditions per place. [2024-06-14 13:53:10,753 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 52 changer transitions 0/395 dead transitions. [2024-06-14 13:53:10,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 395 transitions, 6192 flow [2024-06-14 13:53:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:53:10,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-14 13:53:10,754 INFO L175 Difference]: Start difference. First operand has 294 places, 365 transitions, 5048 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:53:10,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 395 transitions, 6192 flow [2024-06-14 13:53:11,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 395 transitions, 5916 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:11,314 INFO L231 Difference]: Finished difference. Result has 294 places, 379 transitions, 5118 flow [2024-06-14 13:53:11,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4790, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5118, PETRI_PLACES=294, PETRI_TRANSITIONS=379} [2024-06-14 13:53:11,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 13:53:11,315 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 379 transitions, 5118 flow [2024-06-14 13:53:11,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:11,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:11,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:11,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:53:11,316 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:11,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:11,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1164513933, now seen corresponding path program 9 times [2024-06-14 13:53:11,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:11,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976493098] [2024-06-14 13:53:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:11,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:11,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976493098] [2024-06-14 13:53:11,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976493098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:11,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:11,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:11,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429228692] [2024-06-14 13:53:11,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:11,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:11,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:11,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:11,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 379 transitions, 5118 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:11,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:11,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:11,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:12,257 INFO L124 PetriNetUnfolderBase]: 2172/3691 cut-off events. [2024-06-14 13:53:12,258 INFO L125 PetriNetUnfolderBase]: For 266291/266291 co-relation queries the response was YES. [2024-06-14 13:53:12,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25733 conditions, 3691 events. 2172/3691 cut-off events. For 266291/266291 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23113 event pairs, 378 based on Foata normal form. 4/3692 useless extension candidates. Maximal degree in co-relation 25601. Up to 3013 conditions per place. [2024-06-14 13:53:12,299 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 128 changer transitions 0/427 dead transitions. [2024-06-14 13:53:12,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 427 transitions, 6407 flow [2024-06-14 13:53:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 13:53:12,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 13:53:12,300 INFO L175 Difference]: Start difference. First operand has 294 places, 379 transitions, 5118 flow. Second operand 8 states and 204 transitions. [2024-06-14 13:53:12,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 427 transitions, 6407 flow [2024-06-14 13:53:12,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 427 transitions, 6281 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:12,777 INFO L231 Difference]: Finished difference. Result has 299 places, 395 transitions, 5578 flow [2024-06-14 13:53:12,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5578, PETRI_PLACES=299, PETRI_TRANSITIONS=395} [2024-06-14 13:53:12,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-14 13:53:12,778 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 395 transitions, 5578 flow [2024-06-14 13:53:12,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:12,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:12,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:12,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:53:12,778 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:12,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:12,778 INFO L85 PathProgramCache]: Analyzing trace with hash -946775411, now seen corresponding path program 10 times [2024-06-14 13:53:12,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:12,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385501601] [2024-06-14 13:53:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:12,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385501601] [2024-06-14 13:53:13,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385501601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:13,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:13,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:13,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508406380] [2024-06-14 13:53:13,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:13,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:13,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:13,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:13,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 395 transitions, 5578 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:13,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:13,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:13,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:13,683 INFO L124 PetriNetUnfolderBase]: 2174/3696 cut-off events. [2024-06-14 13:53:13,683 INFO L125 PetriNetUnfolderBase]: For 269757/269760 co-relation queries the response was YES. [2024-06-14 13:53:13,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26744 conditions, 3696 events. 2174/3696 cut-off events. For 269757/269760 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23218 event pairs, 386 based on Foata normal form. 4/3696 useless extension candidates. Maximal degree in co-relation 26609. Up to 3015 conditions per place. [2024-06-14 13:53:13,722 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 136 changer transitions 0/429 dead transitions. [2024-06-14 13:53:13,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 429 transitions, 6904 flow [2024-06-14 13:53:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:13,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 13:53:13,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-14 13:53:13,730 INFO L175 Difference]: Start difference. First operand has 299 places, 395 transitions, 5578 flow. Second operand 7 states and 183 transitions. [2024-06-14 13:53:13,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 429 transitions, 6904 flow [2024-06-14 13:53:14,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 429 transitions, 6725 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:14,333 INFO L231 Difference]: Finished difference. Result has 302 places, 401 transitions, 5819 flow [2024-06-14 13:53:14,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5423, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5819, PETRI_PLACES=302, PETRI_TRANSITIONS=401} [2024-06-14 13:53:14,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-14 13:53:14,333 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 401 transitions, 5819 flow [2024-06-14 13:53:14,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:14,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:14,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:14,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:53:14,334 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:14,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:14,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1341894059, now seen corresponding path program 11 times [2024-06-14 13:53:14,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:14,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611926952] [2024-06-14 13:53:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:14,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:14,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:14,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611926952] [2024-06-14 13:53:14,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611926952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:14,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:14,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:14,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528164075] [2024-06-14 13:53:14,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:14,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:14,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:14,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:14,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:14,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 401 transitions, 5819 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:14,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:14,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:14,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:15,267 INFO L124 PetriNetUnfolderBase]: 2168/3686 cut-off events. [2024-06-14 13:53:15,267 INFO L125 PetriNetUnfolderBase]: For 255395/255395 co-relation queries the response was YES. [2024-06-14 13:53:15,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26363 conditions, 3686 events. 2168/3686 cut-off events. For 255395/255395 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23120 event pairs, 377 based on Foata normal form. 2/3685 useless extension candidates. Maximal degree in co-relation 26227. Up to 3255 conditions per place. [2024-06-14 13:53:15,310 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 371 selfloop transitions, 41 changer transitions 0/419 dead transitions. [2024-06-14 13:53:15,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 419 transitions, 6689 flow [2024-06-14 13:53:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 13:53:15,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 13:53:15,311 INFO L175 Difference]: Start difference. First operand has 302 places, 401 transitions, 5819 flow. Second operand 5 states and 130 transitions. [2024-06-14 13:53:15,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 419 transitions, 6689 flow [2024-06-14 13:53:15,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 419 transitions, 6451 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:15,850 INFO L231 Difference]: Finished difference. Result has 303 places, 401 transitions, 5689 flow [2024-06-14 13:53:15,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5689, PETRI_PLACES=303, PETRI_TRANSITIONS=401} [2024-06-14 13:53:15,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 13:53:15,851 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 401 transitions, 5689 flow [2024-06-14 13:53:15,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:15,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:15,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:15,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:53:15,851 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:15,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash 7896876, now seen corresponding path program 6 times [2024-06-14 13:53:15,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:15,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98889643] [2024-06-14 13:53:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:15,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:16,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:16,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98889643] [2024-06-14 13:53:16,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98889643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:16,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:16,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:16,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157316815] [2024-06-14 13:53:16,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:16,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:16,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:16,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:16,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:16,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:16,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 401 transitions, 5689 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:16,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:16,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:16,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:16,744 INFO L124 PetriNetUnfolderBase]: 2165/3667 cut-off events. [2024-06-14 13:53:16,744 INFO L125 PetriNetUnfolderBase]: For 250119/250119 co-relation queries the response was YES. [2024-06-14 13:53:16,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26239 conditions, 3667 events. 2165/3667 cut-off events. For 250119/250119 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 22936 event pairs, 389 based on Foata normal form. 1/3662 useless extension candidates. Maximal degree in co-relation 26102. Up to 3028 conditions per place. [2024-06-14 13:53:16,785 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 155 changer transitions 0/421 dead transitions. [2024-06-14 13:53:16,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 421 transitions, 6849 flow [2024-06-14 13:53:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:53:16,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-14 13:53:16,786 INFO L175 Difference]: Start difference. First operand has 303 places, 401 transitions, 5689 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:53:16,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 421 transitions, 6849 flow [2024-06-14 13:53:17,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 421 transitions, 6737 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:17,462 INFO L231 Difference]: Finished difference. Result has 306 places, 401 transitions, 5897 flow [2024-06-14 13:53:17,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5897, PETRI_PLACES=306, PETRI_TRANSITIONS=401} [2024-06-14 13:53:17,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-14 13:53:17,462 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 401 transitions, 5897 flow [2024-06-14 13:53:17,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:17,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:17,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:17,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:53:17,463 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:17,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -760298522, now seen corresponding path program 7 times [2024-06-14 13:53:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:17,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055754432] [2024-06-14 13:53:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:17,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:17,700 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 13:53:17,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055754432] [2024-06-14 13:53:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055754432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:17,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:17,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:17,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829858466] [2024-06-14 13:53:17,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:17,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:17,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:17,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:17,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:17,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 401 transitions, 5897 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:17,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:17,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:17,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:18,317 INFO L124 PetriNetUnfolderBase]: 2162/3663 cut-off events. [2024-06-14 13:53:18,317 INFO L125 PetriNetUnfolderBase]: For 249147/249147 co-relation queries the response was YES. [2024-06-14 13:53:18,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26431 conditions, 3663 events. 2162/3663 cut-off events. For 249147/249147 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 22940 event pairs, 389 based on Foata normal form. 1/3658 useless extension candidates. Maximal degree in co-relation 26294. Up to 3025 conditions per place. [2024-06-14 13:53:18,359 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 155 changer transitions 0/421 dead transitions. [2024-06-14 13:53:18,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 421 transitions, 7057 flow [2024-06-14 13:53:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:53:18,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 13:53:18,364 INFO L175 Difference]: Start difference. First operand has 306 places, 401 transitions, 5897 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:53:18,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 421 transitions, 7057 flow [2024-06-14 13:53:19,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 421 transitions, 6831 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:19,070 INFO L231 Difference]: Finished difference. Result has 308 places, 401 transitions, 5987 flow [2024-06-14 13:53:19,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5987, PETRI_PLACES=308, PETRI_TRANSITIONS=401} [2024-06-14 13:53:19,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-14 13:53:19,071 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 401 transitions, 5987 flow [2024-06-14 13:53:19,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:19,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:19,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:19,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:53:19,071 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:19,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:19,071 INFO L85 PathProgramCache]: Analyzing trace with hash -250461596, now seen corresponding path program 8 times [2024-06-14 13:53:19,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:19,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4395073] [2024-06-14 13:53:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:19,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:19,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4395073] [2024-06-14 13:53:19,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4395073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:19,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:19,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:19,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242012603] [2024-06-14 13:53:19,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:19,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:19,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:19,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:19,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 401 transitions, 5987 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:19,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:19,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:19,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:19,919 INFO L124 PetriNetUnfolderBase]: 2167/3672 cut-off events. [2024-06-14 13:53:19,920 INFO L125 PetriNetUnfolderBase]: For 256823/256823 co-relation queries the response was YES. [2024-06-14 13:53:19,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26618 conditions, 3672 events. 2167/3672 cut-off events. For 256823/256823 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23027 event pairs, 389 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 26480. Up to 3031 conditions per place. [2024-06-14 13:53:19,962 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 168 changer transitions 0/425 dead transitions. [2024-06-14 13:53:19,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 425 transitions, 7363 flow [2024-06-14 13:53:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:53:19,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 13:53:19,963 INFO L175 Difference]: Start difference. First operand has 308 places, 401 transitions, 5987 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:53:19,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 425 transitions, 7363 flow [2024-06-14 13:53:20,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 425 transitions, 6753 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:20,646 INFO L231 Difference]: Finished difference. Result has 306 places, 404 transitions, 5777 flow [2024-06-14 13:53:20,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5777, PETRI_PLACES=306, PETRI_TRANSITIONS=404} [2024-06-14 13:53:20,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-14 13:53:20,647 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 404 transitions, 5777 flow [2024-06-14 13:53:20,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:20,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:20,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:20,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:53:20,647 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:20,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:20,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1861270502, now seen corresponding path program 9 times [2024-06-14 13:53:20,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:20,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358104886] [2024-06-14 13:53:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:20,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:20,890 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 13:53:20,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:20,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358104886] [2024-06-14 13:53:20,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358104886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:20,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:20,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:20,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39798932] [2024-06-14 13:53:20,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:20,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:20,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:20,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:20,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 404 transitions, 5777 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:20,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:20,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:20,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:21,509 INFO L124 PetriNetUnfolderBase]: 2164/3668 cut-off events. [2024-06-14 13:53:21,509 INFO L125 PetriNetUnfolderBase]: For 256845/256845 co-relation queries the response was YES. [2024-06-14 13:53:21,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26497 conditions, 3668 events. 2164/3668 cut-off events. For 256845/256845 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 22961 event pairs, 389 based on Foata normal form. 1/3663 useless extension candidates. Maximal degree in co-relation 26360. Up to 3028 conditions per place. [2024-06-14 13:53:21,556 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 168 changer transitions 0/424 dead transitions. [2024-06-14 13:53:21,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 424 transitions, 6951 flow [2024-06-14 13:53:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:53:21,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-14 13:53:21,557 INFO L175 Difference]: Start difference. First operand has 306 places, 404 transitions, 5777 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:53:21,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 424 transitions, 6951 flow [2024-06-14 13:53:22,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 424 transitions, 6445 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:22,325 INFO L231 Difference]: Finished difference. Result has 307 places, 404 transitions, 5613 flow [2024-06-14 13:53:22,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5613, PETRI_PLACES=307, PETRI_TRANSITIONS=404} [2024-06-14 13:53:22,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-14 13:53:22,325 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 404 transitions, 5613 flow [2024-06-14 13:53:22,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:22,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:22,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:22,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:53:22,326 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:22,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1739146970, now seen corresponding path program 10 times [2024-06-14 13:53:22,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:22,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004184758] [2024-06-14 13:53:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:22,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:22,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:22,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004184758] [2024-06-14 13:53:22,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004184758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:22,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:22,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734389970] [2024-06-14 13:53:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:22,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:22,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:22,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 404 transitions, 5613 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:22,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:22,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:22,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:23,216 INFO L124 PetriNetUnfolderBase]: 2161/3669 cut-off events. [2024-06-14 13:53:23,216 INFO L125 PetriNetUnfolderBase]: For 258574/258574 co-relation queries the response was YES. [2024-06-14 13:53:23,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26254 conditions, 3669 events. 2161/3669 cut-off events. For 258574/258574 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 22991 event pairs, 377 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 26117. Up to 3251 conditions per place. [2024-06-14 13:53:23,260 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 361 selfloop transitions, 53 changer transitions 0/421 dead transitions. [2024-06-14 13:53:23,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 421 transitions, 6629 flow [2024-06-14 13:53:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 13:53:23,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-14 13:53:23,260 INFO L175 Difference]: Start difference. First operand has 307 places, 404 transitions, 5613 flow. Second operand 9 states and 199 transitions. [2024-06-14 13:53:23,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 421 transitions, 6629 flow [2024-06-14 13:53:23,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 421 transitions, 6273 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:23,984 INFO L231 Difference]: Finished difference. Result has 309 places, 404 transitions, 5369 flow [2024-06-14 13:53:23,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5257, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5369, PETRI_PLACES=309, PETRI_TRANSITIONS=404} [2024-06-14 13:53:23,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-14 13:53:23,985 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 404 transitions, 5369 flow [2024-06-14 13:53:23,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:23,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:23,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:23,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:53:23,986 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:23,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash -125418906, now seen corresponding path program 11 times [2024-06-14 13:53:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:23,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655665085] [2024-06-14 13:53:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:23,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:24,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:24,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655665085] [2024-06-14 13:53:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655665085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:24,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:24,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:24,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234001131] [2024-06-14 13:53:24,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:24,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:24,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 404 transitions, 5369 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:24,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:24,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:24,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:24,867 INFO L124 PetriNetUnfolderBase]: 2158/3665 cut-off events. [2024-06-14 13:53:24,867 INFO L125 PetriNetUnfolderBase]: For 260871/260871 co-relation queries the response was YES. [2024-06-14 13:53:24,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25921 conditions, 3665 events. 2158/3665 cut-off events. For 260871/260871 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 22992 event pairs, 377 based on Foata normal form. 1/3663 useless extension candidates. Maximal degree in co-relation 25783. Up to 3248 conditions per place. [2024-06-14 13:53:24,909 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 53 changer transitions 0/420 dead transitions. [2024-06-14 13:53:24,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 420 transitions, 6233 flow [2024-06-14 13:53:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 13:53:24,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 13:53:24,909 INFO L175 Difference]: Start difference. First operand has 309 places, 404 transitions, 5369 flow. Second operand 9 states and 198 transitions. [2024-06-14 13:53:24,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 420 transitions, 6233 flow [2024-06-14 13:53:25,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 420 transitions, 6093 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:25,649 INFO L231 Difference]: Finished difference. Result has 310 places, 404 transitions, 5341 flow [2024-06-14 13:53:25,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5341, PETRI_PLACES=310, PETRI_TRANSITIONS=404} [2024-06-14 13:53:25,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-14 13:53:25,650 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 404 transitions, 5341 flow [2024-06-14 13:53:25,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:25,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:25,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:25,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:53:25,650 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:25,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:25,650 INFO L85 PathProgramCache]: Analyzing trace with hash -939411082, now seen corresponding path program 12 times [2024-06-14 13:53:25,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:25,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785742601] [2024-06-14 13:53:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:25,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:25,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:25,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785742601] [2024-06-14 13:53:25,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785742601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:25,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:25,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:25,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093590321] [2024-06-14 13:53:25,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:25,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:25,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:25,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:25,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:25,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 404 transitions, 5341 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:25,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:25,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:25,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:26,543 INFO L124 PetriNetUnfolderBase]: 2163/3675 cut-off events. [2024-06-14 13:53:26,543 INFO L125 PetriNetUnfolderBase]: For 267581/267584 co-relation queries the response was YES. [2024-06-14 13:53:26,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26039 conditions, 3675 events. 2163/3675 cut-off events. For 267581/267584 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23084 event pairs, 386 based on Foata normal form. 3/3674 useless extension candidates. Maximal degree in co-relation 25900. Up to 3112 conditions per place. [2024-06-14 13:53:26,588 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 113 changer transitions 0/431 dead transitions. [2024-06-14 13:53:26,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 431 transitions, 6597 flow [2024-06-14 13:53:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 13:53:26,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-14 13:53:26,589 INFO L175 Difference]: Start difference. First operand has 310 places, 404 transitions, 5341 flow. Second operand 9 states and 208 transitions. [2024-06-14 13:53:26,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 431 transitions, 6597 flow [2024-06-14 13:53:27,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 431 transitions, 6469 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:27,427 INFO L231 Difference]: Finished difference. Result has 311 places, 407 transitions, 5491 flow [2024-06-14 13:53:27,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5491, PETRI_PLACES=311, PETRI_TRANSITIONS=407} [2024-06-14 13:53:27,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-14 13:53:27,427 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 407 transitions, 5491 flow [2024-06-14 13:53:27,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:27,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:27,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:27,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:53:27,428 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:27,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash -711992930, now seen corresponding path program 13 times [2024-06-14 13:53:27,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:27,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551279355] [2024-06-14 13:53:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:27,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:27,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551279355] [2024-06-14 13:53:27,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551279355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:27,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:27,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:27,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006388047] [2024-06-14 13:53:27,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:27,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:27,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:27,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 407 transitions, 5491 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:27,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:27,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:27,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:28,315 INFO L124 PetriNetUnfolderBase]: 2168/3683 cut-off events. [2024-06-14 13:53:28,315 INFO L125 PetriNetUnfolderBase]: For 274477/274477 co-relation queries the response was YES. [2024-06-14 13:53:28,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26362 conditions, 3683 events. 2168/3683 cut-off events. For 274477/274477 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23097 event pairs, 377 based on Foata normal form. 1/3681 useless extension candidates. Maximal degree in co-relation 26222. Up to 3118 conditions per place. [2024-06-14 13:53:28,360 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 115 changer transitions 0/440 dead transitions. [2024-06-14 13:53:28,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 440 transitions, 6791 flow [2024-06-14 13:53:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 13:53:28,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:53:28,361 INFO L175 Difference]: Start difference. First operand has 311 places, 407 transitions, 5491 flow. Second operand 9 states and 216 transitions. [2024-06-14 13:53:28,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 440 transitions, 6791 flow [2024-06-14 13:53:29,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 440 transitions, 6459 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:29,121 INFO L231 Difference]: Finished difference. Result has 313 places, 410 transitions, 5451 flow [2024-06-14 13:53:29,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5181, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5451, PETRI_PLACES=313, PETRI_TRANSITIONS=410} [2024-06-14 13:53:29,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-14 13:53:29,122 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 410 transitions, 5451 flow [2024-06-14 13:53:29,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:29,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:29,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:29,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:53:29,122 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:29,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash -946762732, now seen corresponding path program 14 times [2024-06-14 13:53:29,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:29,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341850826] [2024-06-14 13:53:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:29,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:29,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341850826] [2024-06-14 13:53:29,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341850826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:29,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:29,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:29,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044037943] [2024-06-14 13:53:29,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:29,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:29,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:29,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 410 transitions, 5451 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:29,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:29,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:29,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:29,992 INFO L124 PetriNetUnfolderBase]: 2165/3680 cut-off events. [2024-06-14 13:53:29,992 INFO L125 PetriNetUnfolderBase]: For 277712/277715 co-relation queries the response was YES. [2024-06-14 13:53:30,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26249 conditions, 3680 events. 2165/3680 cut-off events. For 277712/277715 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23085 event pairs, 386 based on Foata normal form. 3/3679 useless extension candidates. Maximal degree in co-relation 26108. Up to 3115 conditions per place. [2024-06-14 13:53:30,040 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 116 changer transitions 0/435 dead transitions. [2024-06-14 13:53:30,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 435 transitions, 6525 flow [2024-06-14 13:53:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:53:30,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:53:30,041 INFO L175 Difference]: Start difference. First operand has 313 places, 410 transitions, 5451 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:53:30,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 435 transitions, 6525 flow [2024-06-14 13:53:30,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 435 transitions, 6327 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:30,984 INFO L231 Difference]: Finished difference. Result has 314 places, 410 transitions, 5493 flow [2024-06-14 13:53:30,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5255, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=314, PETRI_TRANSITIONS=410} [2024-06-14 13:53:30,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-14 13:53:30,985 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 410 transitions, 5493 flow [2024-06-14 13:53:30,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:30,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:30,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:30,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:53:30,985 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:30,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1173240712, now seen corresponding path program 15 times [2024-06-14 13:53:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:30,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567449456] [2024-06-14 13:53:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:30,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:31,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:31,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567449456] [2024-06-14 13:53:31,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567449456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:31,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:31,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:31,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431199478] [2024-06-14 13:53:31,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:31,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:31,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:31,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:31,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 410 transitions, 5493 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:31,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:31,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:31,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:31,890 INFO L124 PetriNetUnfolderBase]: 2162/3675 cut-off events. [2024-06-14 13:53:31,890 INFO L125 PetriNetUnfolderBase]: For 274630/274630 co-relation queries the response was YES. [2024-06-14 13:53:31,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26153 conditions, 3675 events. 2162/3675 cut-off events. For 274630/274630 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23038 event pairs, 377 based on Foata normal form. 1/3673 useless extension candidates. Maximal degree in co-relation 26012. Up to 3112 conditions per place. [2024-06-14 13:53:31,934 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 120 changer transitions 0/438 dead transitions. [2024-06-14 13:53:31,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 438 transitions, 6425 flow [2024-06-14 13:53:31,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 13:53:31,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 13:53:31,935 INFO L175 Difference]: Start difference. First operand has 314 places, 410 transitions, 5493 flow. Second operand 9 states and 213 transitions. [2024-06-14 13:53:31,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 438 transitions, 6425 flow [2024-06-14 13:53:32,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 438 transitions, 6111 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:32,861 INFO L231 Difference]: Finished difference. Result has 315 places, 410 transitions, 5429 flow [2024-06-14 13:53:32,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5179, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5429, PETRI_PLACES=315, PETRI_TRANSITIONS=410} [2024-06-14 13:53:32,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-14 13:53:32,862 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 410 transitions, 5429 flow [2024-06-14 13:53:32,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:32,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:32,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:32,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:53:32,862 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:32,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:32,863 INFO L85 PathProgramCache]: Analyzing trace with hash -338719836, now seen corresponding path program 1 times [2024-06-14 13:53:32,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:32,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875574034] [2024-06-14 13:53:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:32,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:33,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875574034] [2024-06-14 13:53:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875574034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:33,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:33,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682880232] [2024-06-14 13:53:33,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:33,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:33,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:33,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:33,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 410 transitions, 5429 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:33,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:33,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:33,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:33,852 INFO L124 PetriNetUnfolderBase]: 2281/3872 cut-off events. [2024-06-14 13:53:33,852 INFO L125 PetriNetUnfolderBase]: For 360601/360601 co-relation queries the response was YES. [2024-06-14 13:53:33,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28464 conditions, 3872 events. 2281/3872 cut-off events. For 360601/360601 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24539 event pairs, 379 based on Foata normal form. 12/3878 useless extension candidates. Maximal degree in co-relation 28322. Up to 2746 conditions per place. [2024-06-14 13:53:33,901 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 193 changer transitions 0/444 dead transitions. [2024-06-14 13:53:33,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 444 transitions, 6651 flow [2024-06-14 13:53:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 13:53:33,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-14 13:53:33,902 INFO L175 Difference]: Start difference. First operand has 315 places, 410 transitions, 5429 flow. Second operand 8 states and 195 transitions. [2024-06-14 13:53:33,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 444 transitions, 6651 flow [2024-06-14 13:53:34,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 444 transitions, 6309 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:34,804 INFO L231 Difference]: Finished difference. Result has 313 places, 414 transitions, 5568 flow [2024-06-14 13:53:34,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5568, PETRI_PLACES=313, PETRI_TRANSITIONS=414} [2024-06-14 13:53:34,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-14 13:53:34,805 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 414 transitions, 5568 flow [2024-06-14 13:53:34,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:34,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:34,805 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 13:53:34,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:53:34,805 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:34,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:34,806 INFO L85 PathProgramCache]: Analyzing trace with hash -250006206, now seen corresponding path program 2 times [2024-06-14 13:53:34,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:34,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889049395] [2024-06-14 13:53:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:34,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:35,051 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 13:53:35,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:35,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889049395] [2024-06-14 13:53:35,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889049395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:35,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:35,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863160425] [2024-06-14 13:53:35,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:35,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:35,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:35,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 414 transitions, 5568 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:35,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:35,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:35,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:35,754 INFO L124 PetriNetUnfolderBase]: 2337/3963 cut-off events. [2024-06-14 13:53:35,754 INFO L125 PetriNetUnfolderBase]: For 377020/377020 co-relation queries the response was YES. [2024-06-14 13:53:35,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29268 conditions, 3963 events. 2337/3963 cut-off events. For 377020/377020 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25205 event pairs, 442 based on Foata normal form. 16/3973 useless extension candidates. Maximal degree in co-relation 29127. Up to 3237 conditions per place. [2024-06-14 13:53:35,806 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 176 changer transitions 0/438 dead transitions. [2024-06-14 13:53:35,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 438 transitions, 6552 flow [2024-06-14 13:53:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:53:35,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 13:53:35,806 INFO L175 Difference]: Start difference. First operand has 313 places, 414 transitions, 5568 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:53:35,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 438 transitions, 6552 flow [2024-06-14 13:53:36,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 438 transitions, 6303 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:36,656 INFO L231 Difference]: Finished difference. Result has 317 places, 416 transitions, 5727 flow [2024-06-14 13:53:36,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5727, PETRI_PLACES=317, PETRI_TRANSITIONS=416} [2024-06-14 13:53:36,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-14 13:53:36,657 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 416 transitions, 5727 flow [2024-06-14 13:53:36,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:36,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:36,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:36,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:53:36,657 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:36,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:36,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1018343894, now seen corresponding path program 3 times [2024-06-14 13:53:36,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:36,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361391720] [2024-06-14 13:53:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:36,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:36,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:36,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361391720] [2024-06-14 13:53:36,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361391720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:36,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:36,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:36,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447050851] [2024-06-14 13:53:36,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:36,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:36,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:36,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:36,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:36,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 416 transitions, 5727 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:36,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:36,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:36,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:37,642 INFO L124 PetriNetUnfolderBase]: 2377/4027 cut-off events. [2024-06-14 13:53:37,643 INFO L125 PetriNetUnfolderBase]: For 374545/374545 co-relation queries the response was YES. [2024-06-14 13:53:37,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30089 conditions, 4027 events. 2377/4027 cut-off events. For 374545/374545 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25651 event pairs, 438 based on Foata normal form. 12/4033 useless extension candidates. Maximal degree in co-relation 29946. Up to 3241 conditions per place. [2024-06-14 13:53:37,690 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 180 changer transitions 0/443 dead transitions. [2024-06-14 13:53:37,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 443 transitions, 6743 flow [2024-06-14 13:53:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:53:37,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 13:53:37,693 INFO L175 Difference]: Start difference. First operand has 317 places, 416 transitions, 5727 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:53:37,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 443 transitions, 6743 flow [2024-06-14 13:53:38,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 443 transitions, 6371 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:38,537 INFO L231 Difference]: Finished difference. Result has 319 places, 418 transitions, 5774 flow [2024-06-14 13:53:38,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5774, PETRI_PLACES=319, PETRI_TRANSITIONS=418} [2024-06-14 13:53:38,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-14 13:53:38,538 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 418 transitions, 5774 flow [2024-06-14 13:53:38,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:38,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:38,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:38,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:53:38,538 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:38,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1739137050, now seen corresponding path program 4 times [2024-06-14 13:53:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:38,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040118374] [2024-06-14 13:53:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:38,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:38,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:38,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040118374] [2024-06-14 13:53:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040118374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:38,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:38,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:38,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63785150] [2024-06-14 13:53:38,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:38,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:38,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:38,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 418 transitions, 5774 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:38,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:38,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:38,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:39,522 INFO L124 PetriNetUnfolderBase]: 2433/4124 cut-off events. [2024-06-14 13:53:39,522 INFO L125 PetriNetUnfolderBase]: For 397534/397534 co-relation queries the response was YES. [2024-06-14 13:53:39,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30791 conditions, 4124 events. 2433/4124 cut-off events. For 397534/397534 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 26433 event pairs, 448 based on Foata normal form. 16/4137 useless extension candidates. Maximal degree in co-relation 30647. Up to 3615 conditions per place. [2024-06-14 13:53:39,572 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 55 changer transitions 0/440 dead transitions. [2024-06-14 13:53:39,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 440 transitions, 6764 flow [2024-06-14 13:53:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:39,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 13:53:39,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 13:53:39,573 INFO L175 Difference]: Start difference. First operand has 319 places, 418 transitions, 5774 flow. Second operand 9 states and 201 transitions. [2024-06-14 13:53:39,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 440 transitions, 6764 flow [2024-06-14 13:53:40,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 440 transitions, 6373 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:40,375 INFO L231 Difference]: Finished difference. Result has 322 places, 420 transitions, 5557 flow [2024-06-14 13:53:40,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5557, PETRI_PLACES=322, PETRI_TRANSITIONS=420} [2024-06-14 13:53:40,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-14 13:53:40,376 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 420 transitions, 5557 flow [2024-06-14 13:53:40,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:40,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:40,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:40,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:53:40,376 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:40,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1739284920, now seen corresponding path program 5 times [2024-06-14 13:53:40,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:40,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409240729] [2024-06-14 13:53:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:40,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:40,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:40,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409240729] [2024-06-14 13:53:40,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409240729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:40,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:40,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:40,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851002693] [2024-06-14 13:53:40,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:40,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:40,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:40,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:40,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:40,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:40,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 420 transitions, 5557 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:40,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:40,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:40,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:41,394 INFO L124 PetriNetUnfolderBase]: 2519/4262 cut-off events. [2024-06-14 13:53:41,394 INFO L125 PetriNetUnfolderBase]: For 421550/421550 co-relation queries the response was YES. [2024-06-14 13:53:41,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32086 conditions, 4262 events. 2519/4262 cut-off events. For 421550/421550 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27350 event pairs, 458 based on Foata normal form. 12/4271 useless extension candidates. Maximal degree in co-relation 31941. Up to 3575 conditions per place. [2024-06-14 13:53:41,451 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 62 changer transitions 0/447 dead transitions. [2024-06-14 13:53:41,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 447 transitions, 6775 flow [2024-06-14 13:53:41,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:41,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 13:53:41,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-14 13:53:41,452 INFO L175 Difference]: Start difference. First operand has 322 places, 420 transitions, 5557 flow. Second operand 9 states and 204 transitions. [2024-06-14 13:53:41,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 447 transitions, 6775 flow [2024-06-14 13:53:42,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 447 transitions, 6637 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:42,434 INFO L231 Difference]: Finished difference. Result has 324 places, 423 transitions, 5636 flow [2024-06-14 13:53:42,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5419, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5636, PETRI_PLACES=324, PETRI_TRANSITIONS=423} [2024-06-14 13:53:42,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-14 13:53:42,435 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 423 transitions, 5636 flow [2024-06-14 13:53:42,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:42,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:42,435 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] [2024-06-14 13:53:42,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:53:42,435 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:42,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1733559468, now seen corresponding path program 1 times [2024-06-14 13:53:42,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:42,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963203183] [2024-06-14 13:53:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:42,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:42,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963203183] [2024-06-14 13:53:42,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963203183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:42,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:42,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:42,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013244249] [2024-06-14 13:53:42,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:42,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:42,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:42,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:42,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 423 transitions, 5636 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:42,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:42,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:42,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:43,481 INFO L124 PetriNetUnfolderBase]: 2625/4438 cut-off events. [2024-06-14 13:53:43,481 INFO L125 PetriNetUnfolderBase]: For 467690/467690 co-relation queries the response was YES. [2024-06-14 13:53:43,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34059 conditions, 4438 events. 2625/4438 cut-off events. For 467690/467690 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28695 event pairs, 483 based on Foata normal form. 12/4447 useless extension candidates. Maximal degree in co-relation 33913. Up to 3791 conditions per place. [2024-06-14 13:53:43,537 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 37 changer transitions 0/451 dead transitions. [2024-06-14 13:53:43,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 451 transitions, 6872 flow [2024-06-14 13:53:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:43,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 13:53:43,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 13:53:43,538 INFO L175 Difference]: Start difference. First operand has 324 places, 423 transitions, 5636 flow. Second operand 9 states and 201 transitions. [2024-06-14 13:53:43,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 451 transitions, 6872 flow [2024-06-14 13:53:44,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 451 transitions, 6764 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:44,692 INFO L231 Difference]: Finished difference. Result has 329 places, 427 transitions, 5716 flow [2024-06-14 13:53:44,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5528, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5716, PETRI_PLACES=329, PETRI_TRANSITIONS=427} [2024-06-14 13:53:44,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-14 13:53:44,692 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 427 transitions, 5716 flow [2024-06-14 13:53:44,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:44,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:44,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:44,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:53:44,693 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:44,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:44,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1173250632, now seen corresponding path program 6 times [2024-06-14 13:53:44,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:44,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807546014] [2024-06-14 13:53:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:44,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:44,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:44,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807546014] [2024-06-14 13:53:44,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807546014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:44,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:44,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:44,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205742251] [2024-06-14 13:53:44,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:44,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:44,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:44,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:44,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:45,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:45,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 427 transitions, 5716 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:45,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:45,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:45,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:45,772 INFO L124 PetriNetUnfolderBase]: 2668/4511 cut-off events. [2024-06-14 13:53:45,772 INFO L125 PetriNetUnfolderBase]: For 487736/487736 co-relation queries the response was YES. [2024-06-14 13:53:45,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34659 conditions, 4511 events. 2668/4511 cut-off events. For 487736/487736 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29281 event pairs, 507 based on Foata normal form. 16/4524 useless extension candidates. Maximal degree in co-relation 34510. Up to 3778 conditions per place. [2024-06-14 13:53:45,828 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 124 changer transitions 0/461 dead transitions. [2024-06-14 13:53:45,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 461 transitions, 6788 flow [2024-06-14 13:53:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 13:53:45,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:53:45,829 INFO L175 Difference]: Start difference. First operand has 329 places, 427 transitions, 5716 flow. Second operand 9 states and 216 transitions. [2024-06-14 13:53:45,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 461 transitions, 6788 flow [2024-06-14 13:53:47,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 461 transitions, 6720 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:47,023 INFO L231 Difference]: Finished difference. Result has 334 places, 429 transitions, 5972 flow [2024-06-14 13:53:47,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5972, PETRI_PLACES=334, PETRI_TRANSITIONS=429} [2024-06-14 13:53:47,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-14 13:53:47,024 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 429 transitions, 5972 flow [2024-06-14 13:53:47,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:47,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:47,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:47,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:53:47,025 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:47,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1173102762, now seen corresponding path program 7 times [2024-06-14 13:53:47,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:47,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764677512] [2024-06-14 13:53:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:47,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:47,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:47,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764677512] [2024-06-14 13:53:47,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764677512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:47,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:47,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:47,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541721427] [2024-06-14 13:53:47,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:47,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:47,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:47,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:47,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 429 transitions, 5972 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:47,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:47,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:47,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:48,196 INFO L124 PetriNetUnfolderBase]: 2721/4607 cut-off events. [2024-06-14 13:53:48,196 INFO L125 PetriNetUnfolderBase]: For 493528/493528 co-relation queries the response was YES. [2024-06-14 13:53:48,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35863 conditions, 4607 events. 2721/4607 cut-off events. For 493528/493528 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29983 event pairs, 438 based on Foata normal form. 12/4616 useless extension candidates. Maximal degree in co-relation 35712. Up to 3469 conditions per place. [2024-06-14 13:53:48,246 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 322 selfloop transitions, 141 changer transitions 0/470 dead transitions. [2024-06-14 13:53:48,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 470 transitions, 7258 flow [2024-06-14 13:53:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-14 13:53:48,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-14 13:53:48,248 INFO L175 Difference]: Start difference. First operand has 334 places, 429 transitions, 5972 flow. Second operand 9 states and 223 transitions. [2024-06-14 13:53:48,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 470 transitions, 7258 flow [2024-06-14 13:53:49,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 470 transitions, 6984 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:49,587 INFO L231 Difference]: Finished difference. Result has 336 places, 431 transitions, 6050 flow [2024-06-14 13:53:49,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6050, PETRI_PLACES=336, PETRI_TRANSITIONS=431} [2024-06-14 13:53:49,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-14 13:53:49,587 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 431 transitions, 6050 flow [2024-06-14 13:53:49,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:49,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:49,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:49,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:53:49,588 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:49,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:49,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1178828214, now seen corresponding path program 2 times [2024-06-14 13:53:49,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:49,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626109602] [2024-06-14 13:53:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:49,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:49,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:49,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626109602] [2024-06-14 13:53:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626109602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:49,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:49,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:49,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720651945] [2024-06-14 13:53:49,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:49,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:49,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:49,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:49,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 431 transitions, 6050 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:49,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:49,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:49,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:50,712 INFO L124 PetriNetUnfolderBase]: 2903/4914 cut-off events. [2024-06-14 13:53:50,713 INFO L125 PetriNetUnfolderBase]: For 544308/544308 co-relation queries the response was YES. [2024-06-14 13:53:50,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38923 conditions, 4914 events. 2903/4914 cut-off events. For 544308/544308 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32449 event pairs, 544 based on Foata normal form. 12/4923 useless extension candidates. Maximal degree in co-relation 38771. Up to 3995 conditions per place. [2024-06-14 13:53:50,780 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 49 changer transitions 0/468 dead transitions. [2024-06-14 13:53:50,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 468 transitions, 7522 flow [2024-06-14 13:53:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:53:50,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-14 13:53:50,781 INFO L175 Difference]: Start difference. First operand has 336 places, 431 transitions, 6050 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:53:50,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 468 transitions, 7522 flow [2024-06-14 13:53:52,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 468 transitions, 7301 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:52,400 INFO L231 Difference]: Finished difference. Result has 341 places, 442 transitions, 6229 flow [2024-06-14 13:53:52,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5841, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6229, PETRI_PLACES=341, PETRI_TRANSITIONS=442} [2024-06-14 13:53:52,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-14 13:53:52,400 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 442 transitions, 6229 flow [2024-06-14 13:53:52,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:52,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:52,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:52,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:53:52,401 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:52,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash -89670218, now seen corresponding path program 3 times [2024-06-14 13:53:52,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:52,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918030940] [2024-06-14 13:53:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:52,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:52,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:52,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918030940] [2024-06-14 13:53:52,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918030940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:52,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:52,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:52,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141671173] [2024-06-14 13:53:52,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:52,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:52,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:52,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:52,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 442 transitions, 6229 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:52,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:52,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:52,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:53,597 INFO L124 PetriNetUnfolderBase]: 3022/5102 cut-off events. [2024-06-14 13:53:53,597 INFO L125 PetriNetUnfolderBase]: For 594355/594355 co-relation queries the response was YES. [2024-06-14 13:53:53,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41565 conditions, 5102 events. 3022/5102 cut-off events. For 594355/594355 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 33818 event pairs, 457 based on Foata normal form. 12/5111 useless extension candidates. Maximal degree in co-relation 41409. Up to 3723 conditions per place. [2024-06-14 13:53:53,663 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 103 changer transitions 0/482 dead transitions. [2024-06-14 13:53:53,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 482 transitions, 7593 flow [2024-06-14 13:53:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:53,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 13:53:53,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-14 13:53:53,664 INFO L175 Difference]: Start difference. First operand has 341 places, 442 transitions, 6229 flow. Second operand 8 states and 201 transitions. [2024-06-14 13:53:53,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 482 transitions, 7593 flow [2024-06-14 13:53:55,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 482 transitions, 7499 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:55,467 INFO L231 Difference]: Finished difference. Result has 347 places, 447 transitions, 6535 flow [2024-06-14 13:53:55,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6145, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6535, PETRI_PLACES=347, PETRI_TRANSITIONS=447} [2024-06-14 13:53:55,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-14 13:53:55,468 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 447 transitions, 6535 flow [2024-06-14 13:53:55,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:55,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:55,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:55,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:53:55,468 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:55,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-14 13:53:55,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:55,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980273605] [2024-06-14 13:53:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:55,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:55,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:55,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980273605] [2024-06-14 13:53:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980273605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:55,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:55,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:55,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374825324] [2024-06-14 13:53:55,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:55,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:55,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:55,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:55,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 447 transitions, 6535 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:55,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:55,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:55,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:56,744 INFO L124 PetriNetUnfolderBase]: 3082/5225 cut-off events. [2024-06-14 13:53:56,744 INFO L125 PetriNetUnfolderBase]: For 597302/597305 co-relation queries the response was YES. [2024-06-14 13:53:56,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43093 conditions, 5225 events. 3082/5225 cut-off events. For 597302/597305 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34981 event pairs, 484 based on Foata normal form. 14/5235 useless extension candidates. Maximal degree in co-relation 42934. Up to 3670 conditions per place. [2024-06-14 13:53:56,810 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 97 changer transitions 0/485 dead transitions. [2024-06-14 13:53:56,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 485 transitions, 8083 flow [2024-06-14 13:53:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 13:53:56,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-14 13:53:56,811 INFO L175 Difference]: Start difference. First operand has 347 places, 447 transitions, 6535 flow. Second operand 7 states and 180 transitions. [2024-06-14 13:53:56,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 485 transitions, 8083 flow [2024-06-14 13:53:58,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 485 transitions, 7926 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:58,736 INFO L231 Difference]: Finished difference. Result has 352 places, 453 transitions, 6771 flow [2024-06-14 13:53:58,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6390, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6771, PETRI_PLACES=352, PETRI_TRANSITIONS=453} [2024-06-14 13:53:58,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-14 13:53:58,736 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 453 transitions, 6771 flow [2024-06-14 13:53:58,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:53:58,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:58,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:58,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:53:58,736 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:58,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:58,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1377358358, now seen corresponding path program 1 times [2024-06-14 13:53:58,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:58,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302313011] [2024-06-14 13:53:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:58,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:58,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:58,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302313011] [2024-06-14 13:53:58,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302313011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:58,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:58,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022571264] [2024-06-14 13:53:58,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:58,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:58,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:59,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:53:59,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 453 transitions, 6771 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:59,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:59,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:53:59,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:59,959 INFO L124 PetriNetUnfolderBase]: 3087/5230 cut-off events. [2024-06-14 13:53:59,959 INFO L125 PetriNetUnfolderBase]: For 561230/561230 co-relation queries the response was YES. [2024-06-14 13:54:00,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43716 conditions, 5230 events. 3087/5230 cut-off events. For 561230/561230 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35153 event pairs, 645 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 43553. Up to 4562 conditions per place. [2024-06-14 13:54:00,033 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 99 changer transitions 0/473 dead transitions. [2024-06-14 13:54:00,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 473 transitions, 7951 flow [2024-06-14 13:54:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:54:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:54:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 13:54:00,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 13:54:00,034 INFO L175 Difference]: Start difference. First operand has 352 places, 453 transitions, 6771 flow. Second operand 6 states and 150 transitions. [2024-06-14 13:54:00,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 473 transitions, 7951 flow [2024-06-14 13:54:02,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 473 transitions, 7810 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-14 13:54:02,062 INFO L231 Difference]: Finished difference. Result has 356 places, 456 transitions, 6873 flow [2024-06-14 13:54:02,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6873, PETRI_PLACES=356, PETRI_TRANSITIONS=456} [2024-06-14 13:54:02,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-14 13:54:02,062 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 456 transitions, 6873 flow [2024-06-14 13:54:02,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:02,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:02,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:02,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:54:02,063 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:02,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash 942885254, now seen corresponding path program 1 times [2024-06-14 13:54:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:02,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510628168] [2024-06-14 13:54:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:02,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:02,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:02,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510628168] [2024-06-14 13:54:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510628168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:02,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:02,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865332276] [2024-06-14 13:54:02,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:02,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:02,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:02,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:02,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:02,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 456 transitions, 6873 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:54:02,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:02,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:02,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:03,278 INFO L124 PetriNetUnfolderBase]: 3100/5248 cut-off events. [2024-06-14 13:54:03,278 INFO L125 PetriNetUnfolderBase]: For 578684/578684 co-relation queries the response was YES. [2024-06-14 13:54:03,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43972 conditions, 5248 events. 3100/5248 cut-off events. For 578684/578684 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 35176 event pairs, 617 based on Foata normal form. 1/5246 useless extension candidates. Maximal degree in co-relation 43807. Up to 4685 conditions per place. [2024-06-14 13:54:03,349 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 57 changer transitions 0/490 dead transitions. [2024-06-14 13:54:03,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 490 transitions, 8203 flow [2024-06-14 13:54:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:54:03,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 13:54:03,350 INFO L175 Difference]: Start difference. First operand has 356 places, 456 transitions, 6873 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:54:03,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 490 transitions, 8203 flow [2024-06-14 13:54:05,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 490 transitions, 7978 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:05,428 INFO L231 Difference]: Finished difference. Result has 359 places, 462 transitions, 6896 flow [2024-06-14 13:54:05,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6650, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6896, PETRI_PLACES=359, PETRI_TRANSITIONS=462} [2024-06-14 13:54:05,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-14 13:54:05,429 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 462 transitions, 6896 flow [2024-06-14 13:54:05,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:54:05,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:05,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:05,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:54:05,429 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:05,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash -452439130, now seen corresponding path program 2 times [2024-06-14 13:54:05,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:05,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591533713] [2024-06-14 13:54:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:05,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:05,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:05,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591533713] [2024-06-14 13:54:05,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591533713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:05,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:05,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:05,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059969310] [2024-06-14 13:54:05,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:05,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:05,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:05,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:05,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 462 transitions, 6896 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:05,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:05,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:05,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:06,720 INFO L124 PetriNetUnfolderBase]: 3105/5259 cut-off events. [2024-06-14 13:54:06,720 INFO L125 PetriNetUnfolderBase]: For 580646/580646 co-relation queries the response was YES. [2024-06-14 13:54:06,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44144 conditions, 5259 events. 3105/5259 cut-off events. For 580646/580646 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 35297 event pairs, 616 based on Foata normal form. 1/5257 useless extension candidates. Maximal degree in co-relation 43980. Up to 4709 conditions per place. [2024-06-14 13:54:06,796 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 429 selfloop transitions, 49 changer transitions 0/485 dead transitions. [2024-06-14 13:54:06,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 485 transitions, 7933 flow [2024-06-14 13:54:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:54:06,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-14 13:54:06,797 INFO L175 Difference]: Start difference. First operand has 359 places, 462 transitions, 6896 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:54:06,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 485 transitions, 7933 flow [2024-06-14 13:54:08,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 485 transitions, 7691 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:08,692 INFO L231 Difference]: Finished difference. Result has 359 places, 465 transitions, 6799 flow [2024-06-14 13:54:08,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6799, PETRI_PLACES=359, PETRI_TRANSITIONS=465} [2024-06-14 13:54:08,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-14 13:54:08,693 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 465 transitions, 6799 flow [2024-06-14 13:54:08,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:08,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:08,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:08,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:54:08,693 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:08,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1036341178, now seen corresponding path program 2 times [2024-06-14 13:54:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:08,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793020290] [2024-06-14 13:54:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:08,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:08,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793020290] [2024-06-14 13:54:08,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793020290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:08,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:08,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:08,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267980765] [2024-06-14 13:54:08,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:08,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:08,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:09,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:09,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 465 transitions, 6799 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:09,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:09,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:09,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:10,025 INFO L124 PetriNetUnfolderBase]: 3118/5277 cut-off events. [2024-06-14 13:54:10,025 INFO L125 PetriNetUnfolderBase]: For 595909/595909 co-relation queries the response was YES. [2024-06-14 13:54:10,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44445 conditions, 5277 events. 3118/5277 cut-off events. For 595909/595909 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35340 event pairs, 617 based on Foata normal form. 1/5275 useless extension candidates. Maximal degree in co-relation 44282. Up to 4671 conditions per place. [2024-06-14 13:54:10,094 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 87 changer transitions 0/495 dead transitions. [2024-06-14 13:54:10,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 495 transitions, 8289 flow [2024-06-14 13:54:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 13:54:10,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-14 13:54:10,095 INFO L175 Difference]: Start difference. First operand has 359 places, 465 transitions, 6799 flow. Second operand 9 states and 211 transitions. [2024-06-14 13:54:10,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 495 transitions, 8289 flow [2024-06-14 13:54:12,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 495 transitions, 8173 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:12,250 INFO L231 Difference]: Finished difference. Result has 362 places, 471 transitions, 6975 flow [2024-06-14 13:54:12,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6687, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6975, PETRI_PLACES=362, PETRI_TRANSITIONS=471} [2024-06-14 13:54:12,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-14 13:54:12,250 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 471 transitions, 6975 flow [2024-06-14 13:54:12,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:12,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:12,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:12,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:54:12,251 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:12,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash -447797500, now seen corresponding path program 3 times [2024-06-14 13:54:12,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:12,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093265138] [2024-06-14 13:54:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:12,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:12,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:12,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093265138] [2024-06-14 13:54:12,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093265138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:12,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:12,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:12,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890475436] [2024-06-14 13:54:12,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:12,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:12,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:12,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:12,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:12,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:12,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 471 transitions, 6975 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:12,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:12,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:12,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:13,560 INFO L124 PetriNetUnfolderBase]: 3115/5273 cut-off events. [2024-06-14 13:54:13,560 INFO L125 PetriNetUnfolderBase]: For 592255/592255 co-relation queries the response was YES. [2024-06-14 13:54:13,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44411 conditions, 5273 events. 3115/5273 cut-off events. For 592255/592255 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35363 event pairs, 616 based on Foata normal form. 1/5271 useless extension candidates. Maximal degree in co-relation 44248. Up to 4717 conditions per place. [2024-06-14 13:54:13,636 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 57 changer transitions 0/494 dead transitions. [2024-06-14 13:54:13,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 494 transitions, 8005 flow [2024-06-14 13:54:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:13,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 13:54:13,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-14 13:54:13,637 INFO L175 Difference]: Start difference. First operand has 362 places, 471 transitions, 6975 flow. Second operand 10 states and 222 transitions. [2024-06-14 13:54:13,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 494 transitions, 8005 flow [2024-06-14 13:54:15,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 494 transitions, 7830 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:15,671 INFO L231 Difference]: Finished difference. Result has 366 places, 471 transitions, 6924 flow [2024-06-14 13:54:15,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6924, PETRI_PLACES=366, PETRI_TRANSITIONS=471} [2024-06-14 13:54:15,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-14 13:54:15,672 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 471 transitions, 6924 flow [2024-06-14 13:54:15,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:15,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:15,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:15,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:54:15,672 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:15,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash -132354280, now seen corresponding path program 3 times [2024-06-14 13:54:15,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:15,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826058954] [2024-06-14 13:54:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:15,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:15,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:15,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826058954] [2024-06-14 13:54:15,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826058954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:15,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:15,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:15,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239117049] [2024-06-14 13:54:15,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:15,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:15,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:15,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:15,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:15,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:15,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 471 transitions, 6924 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:15,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:15,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:15,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:16,948 INFO L124 PetriNetUnfolderBase]: 3112/5269 cut-off events. [2024-06-14 13:54:16,948 INFO L125 PetriNetUnfolderBase]: For 588024/588024 co-relation queries the response was YES. [2024-06-14 13:54:17,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44214 conditions, 5269 events. 3112/5269 cut-off events. For 588024/588024 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35307 event pairs, 617 based on Foata normal form. 1/5267 useless extension candidates. Maximal degree in co-relation 44051. Up to 4664 conditions per place. [2024-06-14 13:54:17,024 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 91 changer transitions 0/495 dead transitions. [2024-06-14 13:54:17,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 495 transitions, 8134 flow [2024-06-14 13:54:17,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-14 13:54:17,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-14 13:54:17,025 INFO L175 Difference]: Start difference. First operand has 366 places, 471 transitions, 6924 flow. Second operand 10 states and 226 transitions. [2024-06-14 13:54:17,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 495 transitions, 8134 flow [2024-06-14 13:54:19,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 495 transitions, 7974 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:19,124 INFO L231 Difference]: Finished difference. Result has 367 places, 471 transitions, 6958 flow [2024-06-14 13:54:19,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6766, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6958, PETRI_PLACES=367, PETRI_TRANSITIONS=471} [2024-06-14 13:54:19,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-14 13:54:19,125 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 471 transitions, 6958 flow [2024-06-14 13:54:19,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:19,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:19,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:19,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:54:19,125 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:19,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:19,126 INFO L85 PathProgramCache]: Analyzing trace with hash 155006860, now seen corresponding path program 4 times [2024-06-14 13:54:19,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:19,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470222700] [2024-06-14 13:54:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:19,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:19,417 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 13:54:19,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470222700] [2024-06-14 13:54:19,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470222700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:19,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:19,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201838601] [2024-06-14 13:54:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:19,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:19,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:19,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:19,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:19,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 471 transitions, 6958 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:19,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:19,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:19,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:20,500 INFO L124 PetriNetUnfolderBase]: 3141/5310 cut-off events. [2024-06-14 13:54:20,500 INFO L125 PetriNetUnfolderBase]: For 600510/600510 co-relation queries the response was YES. [2024-06-14 13:54:20,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44772 conditions, 5310 events. 3141/5310 cut-off events. For 600510/600510 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35705 event pairs, 625 based on Foata normal form. 1/5305 useless extension candidates. Maximal degree in co-relation 44609. Up to 4502 conditions per place. [2024-06-14 13:54:20,572 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 349 selfloop transitions, 165 changer transitions 0/521 dead transitions. [2024-06-14 13:54:20,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 521 transitions, 8755 flow [2024-06-14 13:54:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-14 13:54:20,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-06-14 13:54:20,573 INFO L175 Difference]: Start difference. First operand has 367 places, 471 transitions, 6958 flow. Second operand 10 states and 239 transitions. [2024-06-14 13:54:20,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 521 transitions, 8755 flow [2024-06-14 13:54:22,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 521 transitions, 8582 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:22,353 INFO L231 Difference]: Finished difference. Result has 368 places, 483 transitions, 7274 flow [2024-06-14 13:54:22,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6791, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7274, PETRI_PLACES=368, PETRI_TRANSITIONS=483} [2024-06-14 13:54:22,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-14 13:54:22,354 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 483 transitions, 7274 flow [2024-06-14 13:54:22,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:22,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:22,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:22,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:54:22,355 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:22,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash -985730804, now seen corresponding path program 5 times [2024-06-14 13:54:22,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:22,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471797069] [2024-06-14 13:54:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:22,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:22,605 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 13:54:22,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:22,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471797069] [2024-06-14 13:54:22,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471797069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:22,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:22,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:22,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857756389] [2024-06-14 13:54:22,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:22,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:22,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:22,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:22,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:22,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 483 transitions, 7274 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:22,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:22,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:22,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:23,696 INFO L124 PetriNetUnfolderBase]: 3146/5319 cut-off events. [2024-06-14 13:54:23,696 INFO L125 PetriNetUnfolderBase]: For 601774/601774 co-relation queries the response was YES. [2024-06-14 13:54:23,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45108 conditions, 5319 events. 3146/5319 cut-off events. For 601774/601774 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35743 event pairs, 625 based on Foata normal form. 1/5314 useless extension candidates. Maximal degree in co-relation 44945. Up to 4508 conditions per place. [2024-06-14 13:54:23,759 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 364 selfloop transitions, 149 changer transitions 0/520 dead transitions. [2024-06-14 13:54:23,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 520 transitions, 8949 flow [2024-06-14 13:54:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 13:54:23,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 13:54:23,760 INFO L175 Difference]: Start difference. First operand has 368 places, 483 transitions, 7274 flow. Second operand 9 states and 217 transitions. [2024-06-14 13:54:23,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 520 transitions, 8949 flow [2024-06-14 13:54:25,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 520 transitions, 8599 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:25,684 INFO L231 Difference]: Finished difference. Result has 370 places, 486 transitions, 7265 flow [2024-06-14 13:54:25,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7265, PETRI_PLACES=370, PETRI_TRANSITIONS=486} [2024-06-14 13:54:25,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-14 13:54:25,684 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 486 transitions, 7265 flow [2024-06-14 13:54:25,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:25,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:25,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:25,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:54:25,685 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:25,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash -786130484, now seen corresponding path program 6 times [2024-06-14 13:54:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:25,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218875467] [2024-06-14 13:54:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:25,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:25,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:25,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218875467] [2024-06-14 13:54:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218875467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:25,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:25,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:25,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030999405] [2024-06-14 13:54:25,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:25,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:25,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:25,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:25,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 486 transitions, 7265 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:25,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:25,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:25,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:26,959 INFO L124 PetriNetUnfolderBase]: 3151/5328 cut-off events. [2024-06-14 13:54:26,959 INFO L125 PetriNetUnfolderBase]: For 614372/614372 co-relation queries the response was YES. [2024-06-14 13:54:27,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45233 conditions, 5328 events. 3151/5328 cut-off events. For 614372/614372 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 35801 event pairs, 625 based on Foata normal form. 1/5323 useless extension candidates. Maximal degree in co-relation 45069. Up to 4514 conditions per place. [2024-06-14 13:54:27,038 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 174 changer transitions 0/524 dead transitions. [2024-06-14 13:54:27,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 524 transitions, 8778 flow [2024-06-14 13:54:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-14 13:54:27,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 13:54:27,039 INFO L175 Difference]: Start difference. First operand has 370 places, 486 transitions, 7265 flow. Second operand 11 states and 253 transitions. [2024-06-14 13:54:27,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 524 transitions, 8778 flow [2024-06-14 13:54:29,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 524 transitions, 8452 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:29,201 INFO L231 Difference]: Finished difference. Result has 375 places, 489 transitions, 7330 flow [2024-06-14 13:54:29,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6948, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7330, PETRI_PLACES=375, PETRI_TRANSITIONS=489} [2024-06-14 13:54:29,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-14 13:54:29,201 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 489 transitions, 7330 flow [2024-06-14 13:54:29,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:29,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:29,202 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] [2024-06-14 13:54:29,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:54:29,202 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:29,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash -985610648, now seen corresponding path program 4 times [2024-06-14 13:54:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:29,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948409620] [2024-06-14 13:54:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:29,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:29,463 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 13:54:29,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:29,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948409620] [2024-06-14 13:54:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948409620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:29,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:29,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145466515] [2024-06-14 13:54:29,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:29,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:29,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 489 transitions, 7330 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:29,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:29,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:29,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:30,453 INFO L124 PetriNetUnfolderBase]: 3172/5358 cut-off events. [2024-06-14 13:54:30,453 INFO L125 PetriNetUnfolderBase]: For 636114/636117 co-relation queries the response was YES. [2024-06-14 13:54:30,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45874 conditions, 5358 events. 3172/5358 cut-off events. For 636114/636117 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 35997 event pairs, 666 based on Foata normal form. 1/5345 useless extension candidates. Maximal degree in co-relation 45709. Up to 4363 conditions per place. [2024-06-14 13:54:30,526 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 264 selfloop transitions, 266 changer transitions 0/537 dead transitions. [2024-06-14 13:54:30,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 537 transitions, 9236 flow [2024-06-14 13:54:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-14 13:54:30,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 13:54:30,527 INFO L175 Difference]: Start difference. First operand has 375 places, 489 transitions, 7330 flow. Second operand 10 states and 246 transitions. [2024-06-14 13:54:30,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 537 transitions, 9236 flow [2024-06-14 13:54:32,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 537 transitions, 8944 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:32,798 INFO L231 Difference]: Finished difference. Result has 379 places, 499 transitions, 7861 flow [2024-06-14 13:54:32,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7038, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7861, PETRI_PLACES=379, PETRI_TRANSITIONS=499} [2024-06-14 13:54:32,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-14 13:54:32,798 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 499 transitions, 7861 flow [2024-06-14 13:54:32,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:32,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:32,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:32,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:54:32,798 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:32,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:32,799 INFO L85 PathProgramCache]: Analyzing trace with hash -333534298, now seen corresponding path program 7 times [2024-06-14 13:54:32,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:32,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158097436] [2024-06-14 13:54:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:32,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:33,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:33,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158097436] [2024-06-14 13:54:33,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158097436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:33,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:33,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:33,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039094311] [2024-06-14 13:54:33,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:33,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:33,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:33,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:33,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:33,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:33,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 499 transitions, 7861 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:33,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:33,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:33,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:34,155 INFO L124 PetriNetUnfolderBase]: 3177/5371 cut-off events. [2024-06-14 13:54:34,155 INFO L125 PetriNetUnfolderBase]: For 654331/654334 co-relation queries the response was YES. [2024-06-14 13:54:34,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47024 conditions, 5371 events. 3177/5371 cut-off events. For 654331/654334 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36146 event pairs, 639 based on Foata normal form. 1/5362 useless extension candidates. Maximal degree in co-relation 46857. Up to 4549 conditions per place. [2024-06-14 13:54:34,359 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 174 changer transitions 0/543 dead transitions. [2024-06-14 13:54:34,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 543 transitions, 9433 flow [2024-06-14 13:54:34,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-14 13:54:34,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-14 13:54:34,360 INFO L175 Difference]: Start difference. First operand has 379 places, 499 transitions, 7861 flow. Second operand 11 states and 261 transitions. [2024-06-14 13:54:34,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 543 transitions, 9433 flow [2024-06-14 13:54:36,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 543 transitions, 8973 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:36,500 INFO L231 Difference]: Finished difference. Result has 384 places, 502 transitions, 7789 flow [2024-06-14 13:54:36,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7401, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7789, PETRI_PLACES=384, PETRI_TRANSITIONS=502} [2024-06-14 13:54:36,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-14 13:54:36,501 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 502 transitions, 7789 flow [2024-06-14 13:54:36,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:36,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:36,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:36,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:54:36,501 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:36,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:36,501 INFO L85 PathProgramCache]: Analyzing trace with hash 280566160, now seen corresponding path program 8 times [2024-06-14 13:54:36,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:36,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285184916] [2024-06-14 13:54:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:36,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:36,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285184916] [2024-06-14 13:54:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285184916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:36,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:36,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:36,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956205270] [2024-06-14 13:54:36,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:36,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:36,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:36,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:36,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 502 transitions, 7789 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:36,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:36,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:36,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:37,875 INFO L124 PetriNetUnfolderBase]: 3190/5394 cut-off events. [2024-06-14 13:54:37,876 INFO L125 PetriNetUnfolderBase]: For 667923/667926 co-relation queries the response was YES. [2024-06-14 13:54:37,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47054 conditions, 5394 events. 3190/5394 cut-off events. For 667923/667926 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36350 event pairs, 638 based on Foata normal form. 1/5386 useless extension candidates. Maximal degree in co-relation 46886. Up to 4564 conditions per place. [2024-06-14 13:54:37,957 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 182 changer transitions 0/551 dead transitions. [2024-06-14 13:54:37,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 551 transitions, 9610 flow [2024-06-14 13:54:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:54:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:54:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 330 transitions. [2024-06-14 13:54:37,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 13:54:37,958 INFO L175 Difference]: Start difference. First operand has 384 places, 502 transitions, 7789 flow. Second operand 15 states and 330 transitions. [2024-06-14 13:54:37,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 551 transitions, 9610 flow [2024-06-14 13:54:39,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 551 transitions, 9309 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:39,970 INFO L231 Difference]: Finished difference. Result has 391 places, 508 transitions, 7935 flow [2024-06-14 13:54:39,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7494, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7935, PETRI_PLACES=391, PETRI_TRANSITIONS=508} [2024-06-14 13:54:39,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-14 13:54:39,971 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 508 transitions, 7935 flow [2024-06-14 13:54:39,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:39,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:39,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:39,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:54:39,971 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:39,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash 280773550, now seen corresponding path program 9 times [2024-06-14 13:54:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:39,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971367101] [2024-06-14 13:54:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:39,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:40,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:40,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971367101] [2024-06-14 13:54:40,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971367101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:40,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:40,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:40,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193042757] [2024-06-14 13:54:40,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:40,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:40,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:40,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:40,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:40,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:40,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 508 transitions, 7935 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:40,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:40,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:40,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:41,356 INFO L124 PetriNetUnfolderBase]: 3187/5390 cut-off events. [2024-06-14 13:54:41,356 INFO L125 PetriNetUnfolderBase]: For 677376/677379 co-relation queries the response was YES. [2024-06-14 13:54:41,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47132 conditions, 5390 events. 3187/5390 cut-off events. For 677376/677379 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36332 event pairs, 638 based on Foata normal form. 1/5382 useless extension candidates. Maximal degree in co-relation 46963. Up to 4561 conditions per place. [2024-06-14 13:54:41,433 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 182 changer transitions 0/548 dead transitions. [2024-06-14 13:54:41,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 548 transitions, 9487 flow [2024-06-14 13:54:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:54:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:54:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 293 transitions. [2024-06-14 13:54:41,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366300366300366 [2024-06-14 13:54:41,435 INFO L175 Difference]: Start difference. First operand has 391 places, 508 transitions, 7935 flow. Second operand 13 states and 293 transitions. [2024-06-14 13:54:41,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 548 transitions, 9487 flow [2024-06-14 13:54:43,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 548 transitions, 9166 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:43,776 INFO L231 Difference]: Finished difference. Result has 394 places, 508 transitions, 7984 flow [2024-06-14 13:54:43,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7614, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7984, PETRI_PLACES=394, PETRI_TRANSITIONS=508} [2024-06-14 13:54:43,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-14 13:54:43,776 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 508 transitions, 7984 flow [2024-06-14 13:54:43,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:43,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:43,776 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] [2024-06-14 13:54:43,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:54:43,776 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:43,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:43,777 INFO L85 PathProgramCache]: Analyzing trace with hash -8792992, now seen corresponding path program 5 times [2024-06-14 13:54:43,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:43,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610454523] [2024-06-14 13:54:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:43,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:44,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:44,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610454523] [2024-06-14 13:54:44,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610454523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:44,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:44,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:44,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688220065] [2024-06-14 13:54:44,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:44,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:44,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:44,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:44,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:44,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:44,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 508 transitions, 7984 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:44,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:44,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:44,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:45,221 INFO L124 PetriNetUnfolderBase]: 3200/5407 cut-off events. [2024-06-14 13:54:45,221 INFO L125 PetriNetUnfolderBase]: For 696044/696047 co-relation queries the response was YES. [2024-06-14 13:54:45,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47543 conditions, 5407 events. 3200/5407 cut-off events. For 696044/696047 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36403 event pairs, 664 based on Foata normal form. 1/5394 useless extension candidates. Maximal degree in co-relation 47373. Up to 4195 conditions per place. [2024-06-14 13:54:45,294 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 321 changer transitions 0/558 dead transitions. [2024-06-14 13:54:45,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 558 transitions, 10088 flow [2024-06-14 13:54:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 286 transitions. [2024-06-14 13:54:45,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-14 13:54:45,295 INFO L175 Difference]: Start difference. First operand has 394 places, 508 transitions, 7984 flow. Second operand 12 states and 286 transitions. [2024-06-14 13:54:45,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 558 transitions, 10088 flow [2024-06-14 13:54:47,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 558 transitions, 9759 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:54:47,555 INFO L231 Difference]: Finished difference. Result has 396 places, 517 transitions, 8557 flow [2024-06-14 13:54:47,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7655, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8557, PETRI_PLACES=396, PETRI_TRANSITIONS=517} [2024-06-14 13:54:47,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-14 13:54:47,555 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 517 transitions, 8557 flow [2024-06-14 13:54:47,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:47,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:47,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:47,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:54:47,556 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:47,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:47,556 INFO L85 PathProgramCache]: Analyzing trace with hash 280952296, now seen corresponding path program 6 times [2024-06-14 13:54:47,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:47,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558451025] [2024-06-14 13:54:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:47,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:47,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558451025] [2024-06-14 13:54:47,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558451025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:47,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:47,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:47,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621178151] [2024-06-14 13:54:47,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:47,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:47,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:47,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:47,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:47,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 517 transitions, 8557 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:47,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:47,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:47,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:48,938 INFO L124 PetriNetUnfolderBase]: 3197/5415 cut-off events. [2024-06-14 13:54:48,938 INFO L125 PetriNetUnfolderBase]: For 707838/707841 co-relation queries the response was YES. [2024-06-14 13:54:48,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48610 conditions, 5415 events. 3197/5415 cut-off events. For 707838/707841 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36571 event pairs, 674 based on Foata normal form. 1/5402 useless extension candidates. Maximal degree in co-relation 48438. Up to 4193 conditions per place. [2024-06-14 13:54:49,015 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 324 changer transitions 0/558 dead transitions. [2024-06-14 13:54:49,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 558 transitions, 10329 flow [2024-06-14 13:54:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:54:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:54:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 300 transitions. [2024-06-14 13:54:49,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-14 13:54:49,016 INFO L175 Difference]: Start difference. First operand has 396 places, 517 transitions, 8557 flow. Second operand 13 states and 300 transitions. [2024-06-14 13:54:49,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 558 transitions, 10329 flow [2024-06-14 13:54:51,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 558 transitions, 9737 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:51,973 INFO L231 Difference]: Finished difference. Result has 402 places, 517 transitions, 8619 flow [2024-06-14 13:54:51,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7965, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8619, PETRI_PLACES=402, PETRI_TRANSITIONS=517} [2024-06-14 13:54:51,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-14 13:54:51,973 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 517 transitions, 8619 flow [2024-06-14 13:54:51,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:51,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:51,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:51,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:54:51,974 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:51,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1066447674, now seen corresponding path program 7 times [2024-06-14 13:54:51,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:51,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978989450] [2024-06-14 13:54:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:51,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:52,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:52,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978989450] [2024-06-14 13:54:52,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978989450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:52,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:52,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:52,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724732989] [2024-06-14 13:54:52,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:52,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:52,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:52,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:52,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:52,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 517 transitions, 8619 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:52,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:52,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:52,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:53,374 INFO L124 PetriNetUnfolderBase]: 3226/5443 cut-off events. [2024-06-14 13:54:53,374 INFO L125 PetriNetUnfolderBase]: For 740046/740049 co-relation queries the response was YES. [2024-06-14 13:54:53,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49472 conditions, 5443 events. 3226/5443 cut-off events. For 740046/740049 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36705 event pairs, 656 based on Foata normal form. 1/5430 useless extension candidates. Maximal degree in co-relation 49299. Up to 4218 conditions per place. [2024-06-14 13:54:53,457 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 219 selfloop transitions, 336 changer transitions 0/562 dead transitions. [2024-06-14 13:54:53,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 562 transitions, 10599 flow [2024-06-14 13:54:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:54:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:54:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 298 transitions. [2024-06-14 13:54:53,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2024-06-14 13:54:53,458 INFO L175 Difference]: Start difference. First operand has 402 places, 517 transitions, 8619 flow. Second operand 13 states and 298 transitions. [2024-06-14 13:54:53,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 562 transitions, 10599 flow [2024-06-14 13:54:56,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 562 transitions, 9992 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 13:54:56,533 INFO L231 Difference]: Finished difference. Result has 404 places, 527 transitions, 8900 flow [2024-06-14 13:54:56,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8028, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8900, PETRI_PLACES=404, PETRI_TRANSITIONS=527} [2024-06-14 13:54:56,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-14 13:54:56,534 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 527 transitions, 8900 flow [2024-06-14 13:54:56,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:56,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:56,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:56,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:54:56,534 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:56,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:56,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2117933694, now seen corresponding path program 10 times [2024-06-14 13:54:56,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:56,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706065965] [2024-06-14 13:54:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:56,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:56,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:56,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706065965] [2024-06-14 13:54:56,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706065965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:56,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545803028] [2024-06-14 13:54:56,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:56,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:56,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:54:56,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 527 transitions, 8900 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:56,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:56,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:54:56,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:58,018 INFO L124 PetriNetUnfolderBase]: 3239/5492 cut-off events. [2024-06-14 13:54:58,018 INFO L125 PetriNetUnfolderBase]: For 758006/758009 co-relation queries the response was YES. [2024-06-14 13:54:58,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49940 conditions, 5492 events. 3239/5492 cut-off events. For 758006/758009 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 37311 event pairs, 646 based on Foata normal form. 1/5486 useless extension candidates. Maximal degree in co-relation 49766. Up to 4630 conditions per place. [2024-06-14 13:54:58,097 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 188 changer transitions 0/571 dead transitions. [2024-06-14 13:54:58,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 571 transitions, 10987 flow [2024-06-14 13:54:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:54:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:54:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 327 transitions. [2024-06-14 13:54:58,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-14 13:54:58,098 INFO L175 Difference]: Start difference. First operand has 404 places, 527 transitions, 8900 flow. Second operand 15 states and 327 transitions. [2024-06-14 13:54:58,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 571 transitions, 10987 flow [2024-06-14 13:55:01,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 571 transitions, 10343 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:01,414 INFO L231 Difference]: Finished difference. Result has 410 places, 533 transitions, 8731 flow [2024-06-14 13:55:01,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8264, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8731, PETRI_PLACES=410, PETRI_TRANSITIONS=533} [2024-06-14 13:55:01,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-14 13:55:01,415 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 533 transitions, 8731 flow [2024-06-14 13:55:01,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:01,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:01,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:01,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:55:01,415 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:01,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash 31984284, now seen corresponding path program 8 times [2024-06-14 13:55:01,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:01,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664379760] [2024-06-14 13:55:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:01,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:01,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:01,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664379760] [2024-06-14 13:55:01,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664379760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:01,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:01,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:01,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884776860] [2024-06-14 13:55:01,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:01,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:01,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:01,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:01,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:01,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 533 transitions, 8731 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:01,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:01,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:01,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:02,958 INFO L124 PetriNetUnfolderBase]: 3244/5494 cut-off events. [2024-06-14 13:55:02,958 INFO L125 PetriNetUnfolderBase]: For 771626/771629 co-relation queries the response was YES. [2024-06-14 13:55:03,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49751 conditions, 5494 events. 3244/5494 cut-off events. For 771626/771629 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37250 event pairs, 674 based on Foata normal form. 1/5481 useless extension candidates. Maximal degree in co-relation 49576. Up to 4232 conditions per place. [2024-06-14 13:55:03,031 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 334 changer transitions 0/571 dead transitions. [2024-06-14 13:55:03,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 571 transitions, 10771 flow [2024-06-14 13:55:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:55:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:55:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-06-14 13:55:03,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 13:55:03,040 INFO L175 Difference]: Start difference. First operand has 410 places, 533 transitions, 8731 flow. Second operand 12 states and 282 transitions. [2024-06-14 13:55:03,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 571 transitions, 10771 flow [2024-06-14 13:55:06,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 571 transitions, 10414 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:06,172 INFO L231 Difference]: Finished difference. Result has 413 places, 536 transitions, 9092 flow [2024-06-14 13:55:06,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8374, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9092, PETRI_PLACES=413, PETRI_TRANSITIONS=536} [2024-06-14 13:55:06,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-14 13:55:06,173 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 536 transitions, 9092 flow [2024-06-14 13:55:06,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:06,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:06,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:06,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:55:06,173 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:06,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:06,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1584094298, now seen corresponding path program 11 times [2024-06-14 13:55:06,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:06,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667325043] [2024-06-14 13:55:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:06,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:06,449 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 13:55:06,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667325043] [2024-06-14 13:55:06,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667325043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:06,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:06,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:06,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53471187] [2024-06-14 13:55:06,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:06,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:06,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:06,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:06,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 536 transitions, 9092 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:06,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:06,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:06,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:07,640 INFO L124 PetriNetUnfolderBase]: 3241/5485 cut-off events. [2024-06-14 13:55:07,640 INFO L125 PetriNetUnfolderBase]: For 783479/783482 co-relation queries the response was YES. [2024-06-14 13:55:07,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49986 conditions, 5485 events. 3241/5485 cut-off events. For 783479/783482 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 37187 event pairs, 636 based on Foata normal form. 1/5479 useless extension candidates. Maximal degree in co-relation 49810. Up to 4634 conditions per place. [2024-06-14 13:55:07,720 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 188 changer transitions 0/575 dead transitions. [2024-06-14 13:55:07,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 575 transitions, 10914 flow [2024-06-14 13:55:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-14 13:55:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-14 13:55:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 362 transitions. [2024-06-14 13:55:07,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-14 13:55:07,722 INFO L175 Difference]: Start difference. First operand has 413 places, 536 transitions, 9092 flow. Second operand 17 states and 362 transitions. [2024-06-14 13:55:07,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 575 transitions, 10914 flow [2024-06-14 13:55:11,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 575 transitions, 10360 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:11,202 INFO L231 Difference]: Finished difference. Result has 424 places, 536 transitions, 8920 flow [2024-06-14 13:55:11,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8538, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8920, PETRI_PLACES=424, PETRI_TRANSITIONS=536} [2024-06-14 13:55:11,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-14 13:55:11,203 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 536 transitions, 8920 flow [2024-06-14 13:55:11,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:11,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:11,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:11,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:55:11,204 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:11,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:11,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1583708162, now seen corresponding path program 9 times [2024-06-14 13:55:11,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:11,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238182231] [2024-06-14 13:55:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:11,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:11,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:11,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238182231] [2024-06-14 13:55:11,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238182231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:11,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:11,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:11,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950226770] [2024-06-14 13:55:11,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:11,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:11,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:11,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:11,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:11,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 536 transitions, 8920 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:11,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:11,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:11,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:12,634 INFO L124 PetriNetUnfolderBase]: 3238/5462 cut-off events. [2024-06-14 13:55:12,634 INFO L125 PetriNetUnfolderBase]: For 794924/794927 co-relation queries the response was YES. [2024-06-14 13:55:12,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49717 conditions, 5462 events. 3238/5462 cut-off events. For 794924/794927 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36861 event pairs, 655 based on Foata normal form. 1/5449 useless extension candidates. Maximal degree in co-relation 49540. Up to 4228 conditions per place. [2024-06-14 13:55:12,715 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 336 changer transitions 0/571 dead transitions. [2024-06-14 13:55:12,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 571 transitions, 10732 flow [2024-06-14 13:55:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:55:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:55:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 298 transitions. [2024-06-14 13:55:12,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2024-06-14 13:55:12,716 INFO L175 Difference]: Start difference. First operand has 424 places, 536 transitions, 8920 flow. Second operand 13 states and 298 transitions. [2024-06-14 13:55:12,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 571 transitions, 10732 flow [2024-06-14 13:55:16,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 571 transitions, 10324 flow, removed 12 selfloop flow, removed 16 redundant places. [2024-06-14 13:55:16,069 INFO L231 Difference]: Finished difference. Result has 421 places, 536 transitions, 9190 flow [2024-06-14 13:55:16,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8512, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9190, PETRI_PLACES=421, PETRI_TRANSITIONS=536} [2024-06-14 13:55:16,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-14 13:55:16,070 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 536 transitions, 9190 flow [2024-06-14 13:55:16,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:16,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:16,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:16,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:55:16,070 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:16,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash -541096960, now seen corresponding path program 1 times [2024-06-14 13:55:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:16,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244343820] [2024-06-14 13:55:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:16,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:16,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:16,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244343820] [2024-06-14 13:55:16,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244343820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:16,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:16,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:16,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853010078] [2024-06-14 13:55:16,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:16,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:16,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:16,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:16,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:16,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 536 transitions, 9190 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:16,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:16,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:16,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:17,499 INFO L124 PetriNetUnfolderBase]: 3258/5520 cut-off events. [2024-06-14 13:55:17,499 INFO L125 PetriNetUnfolderBase]: For 833828/833828 co-relation queries the response was YES. [2024-06-14 13:55:17,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50446 conditions, 5520 events. 3258/5520 cut-off events. For 833828/833828 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37506 event pairs, 545 based on Foata normal form. 6/5523 useless extension candidates. Maximal degree in co-relation 50268. Up to 4702 conditions per place. [2024-06-14 13:55:17,586 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 517 selfloop transitions, 44 changer transitions 0/568 dead transitions. [2024-06-14 13:55:17,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 568 transitions, 10701 flow [2024-06-14 13:55:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:55:17,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 13:55:17,587 INFO L175 Difference]: Start difference. First operand has 421 places, 536 transitions, 9190 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:55:17,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 568 transitions, 10701 flow [2024-06-14 13:55:21,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 568 transitions, 10029 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:55:21,274 INFO L231 Difference]: Finished difference. Result has 417 places, 537 transitions, 8632 flow [2024-06-14 13:55:21,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8518, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8632, PETRI_PLACES=417, PETRI_TRANSITIONS=537} [2024-06-14 13:55:21,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-14 13:55:21,275 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 537 transitions, 8632 flow [2024-06-14 13:55:21,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:21,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:21,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:21,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:55:21,275 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:21,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash -275399680, now seen corresponding path program 2 times [2024-06-14 13:55:21,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:21,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425123645] [2024-06-14 13:55:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:21,543 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 13:55:21,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:21,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425123645] [2024-06-14 13:55:21,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425123645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:21,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:21,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:21,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914853924] [2024-06-14 13:55:21,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:21,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:21,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:21,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:21,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 537 transitions, 8632 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:21,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:21,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:21,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:22,798 INFO L124 PetriNetUnfolderBase]: 3278/5544 cut-off events. [2024-06-14 13:55:22,798 INFO L125 PetriNetUnfolderBase]: For 848550/848550 co-relation queries the response was YES. [2024-06-14 13:55:22,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50123 conditions, 5544 events. 3278/5544 cut-off events. For 848550/848550 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37583 event pairs, 613 based on Foata normal form. 6/5547 useless extension candidates. Maximal degree in co-relation 49944. Up to 4903 conditions per place. [2024-06-14 13:55:22,875 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 518 selfloop transitions, 38 changer transitions 0/563 dead transitions. [2024-06-14 13:55:22,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 563 transitions, 9896 flow [2024-06-14 13:55:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:55:22,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-14 13:55:22,876 INFO L175 Difference]: Start difference. First operand has 417 places, 537 transitions, 8632 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:55:22,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 563 transitions, 9896 flow [2024-06-14 13:55:26,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 563 transitions, 9816 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:55:26,599 INFO L231 Difference]: Finished difference. Result has 420 places, 538 transitions, 8658 flow [2024-06-14 13:55:26,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8553, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8658, PETRI_PLACES=420, PETRI_TRANSITIONS=538} [2024-06-14 13:55:26,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-14 13:55:26,599 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 538 transitions, 8658 flow [2024-06-14 13:55:26,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:26,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:26,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:26,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:55:26,600 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:26,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 280781486, now seen corresponding path program 1 times [2024-06-14 13:55:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:26,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085480412] [2024-06-14 13:55:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:26,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085480412] [2024-06-14 13:55:26,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085480412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:26,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:26,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:26,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627095306] [2024-06-14 13:55:26,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:26,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:26,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:26,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:26,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:26,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:26,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 538 transitions, 8658 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:26,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:26,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:26,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:27,992 INFO L124 PetriNetUnfolderBase]: 3286/5551 cut-off events. [2024-06-14 13:55:27,993 INFO L125 PetriNetUnfolderBase]: For 844088/844091 co-relation queries the response was YES. [2024-06-14 13:55:28,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50224 conditions, 5551 events. 3286/5551 cut-off events. For 844088/844091 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37598 event pairs, 640 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 50044. Up to 4905 conditions per place. [2024-06-14 13:55:28,082 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 482 selfloop transitions, 73 changer transitions 0/562 dead transitions. [2024-06-14 13:55:28,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 562 transitions, 9848 flow [2024-06-14 13:55:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:55:28,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 13:55:28,083 INFO L175 Difference]: Start difference. First operand has 420 places, 538 transitions, 8658 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:55:28,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 562 transitions, 9848 flow [2024-06-14 13:55:32,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 562 transitions, 9760 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:32,070 INFO L231 Difference]: Finished difference. Result has 423 places, 540 transitions, 8751 flow [2024-06-14 13:55:32,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8570, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8751, PETRI_PLACES=423, PETRI_TRANSITIONS=540} [2024-06-14 13:55:32,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-14 13:55:32,071 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 540 transitions, 8751 flow [2024-06-14 13:55:32,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:32,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:32,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:32,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:55:32,071 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:32,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash -8393154, now seen corresponding path program 1 times [2024-06-14 13:55:32,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:32,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308296143] [2024-06-14 13:55:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:32,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:32,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:32,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308296143] [2024-06-14 13:55:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308296143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:32,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955320158] [2024-06-14 13:55:32,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:32,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:32,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 540 transitions, 8751 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:32,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:32,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:32,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:33,482 INFO L124 PetriNetUnfolderBase]: 3294/5556 cut-off events. [2024-06-14 13:55:33,482 INFO L125 PetriNetUnfolderBase]: For 860698/860701 co-relation queries the response was YES. [2024-06-14 13:55:33,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50520 conditions, 5556 events. 3294/5556 cut-off events. For 860698/860701 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37571 event pairs, 664 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 50339. Up to 4759 conditions per place. [2024-06-14 13:55:33,571 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 182 changer transitions 0/564 dead transitions. [2024-06-14 13:55:33,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 564 transitions, 9971 flow [2024-06-14 13:55:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:55:33,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-14 13:55:33,571 INFO L175 Difference]: Start difference. First operand has 423 places, 540 transitions, 8751 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:55:33,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 564 transitions, 9971 flow [2024-06-14 13:55:36,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 564 transitions, 9812 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:36,847 INFO L231 Difference]: Finished difference. Result has 425 places, 542 transitions, 9017 flow [2024-06-14 13:55:36,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8592, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9017, PETRI_PLACES=425, PETRI_TRANSITIONS=542} [2024-06-14 13:55:36,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-14 13:55:36,848 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 542 transitions, 9017 flow [2024-06-14 13:55:36,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:36,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:36,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:36,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:55:36,857 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:36,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1803443122, now seen corresponding path program 2 times [2024-06-14 13:55:36,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:36,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514348879] [2024-06-14 13:55:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:37,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:37,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514348879] [2024-06-14 13:55:37,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514348879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:37,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:37,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:37,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044642188] [2024-06-14 13:55:37,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:37,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:37,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:37,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:37,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 542 transitions, 9017 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:37,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:37,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:37,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:38,284 INFO L124 PetriNetUnfolderBase]: 3302/5589 cut-off events. [2024-06-14 13:55:38,284 INFO L125 PetriNetUnfolderBase]: For 874853/874856 co-relation queries the response was YES. [2024-06-14 13:55:38,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51079 conditions, 5589 events. 3302/5589 cut-off events. For 874853/874856 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37985 event pairs, 646 based on Foata normal form. 2/5584 useless extension candidates. Maximal degree in co-relation 50897. Up to 4929 conditions per place. [2024-06-14 13:55:38,373 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 484 selfloop transitions, 73 changer transitions 0/564 dead transitions. [2024-06-14 13:55:38,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 564 transitions, 10209 flow [2024-06-14 13:55:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:55:38,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-06-14 13:55:38,374 INFO L175 Difference]: Start difference. First operand has 425 places, 542 transitions, 9017 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:55:38,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 564 transitions, 10209 flow [2024-06-14 13:55:42,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 564 transitions, 9788 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:42,231 INFO L231 Difference]: Finished difference. Result has 427 places, 544 transitions, 8781 flow [2024-06-14 13:55:42,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8596, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8781, PETRI_PLACES=427, PETRI_TRANSITIONS=544} [2024-06-14 13:55:42,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-14 13:55:42,231 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 544 transitions, 8781 flow [2024-06-14 13:55:42,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:42,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:42,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:42,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:55:42,232 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:42,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1066433786, now seen corresponding path program 2 times [2024-06-14 13:55:42,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:42,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001414216] [2024-06-14 13:55:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:42,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:42,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:42,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001414216] [2024-06-14 13:55:42,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001414216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:42,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:42,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:42,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583647910] [2024-06-14 13:55:42,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:42,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:42,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:42,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:42,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:42,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:42,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 544 transitions, 8781 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:42,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:42,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:42,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:43,671 INFO L124 PetriNetUnfolderBase]: 3310/5594 cut-off events. [2024-06-14 13:55:43,671 INFO L125 PetriNetUnfolderBase]: For 890719/890722 co-relation queries the response was YES. [2024-06-14 13:55:43,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51004 conditions, 5594 events. 3310/5594 cut-off events. For 890719/890722 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 37925 event pairs, 678 based on Foata normal form. 2/5582 useless extension candidates. Maximal degree in co-relation 50821. Up to 4783 conditions per place. [2024-06-14 13:55:43,752 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 182 changer transitions 0/565 dead transitions. [2024-06-14 13:55:43,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 565 transitions, 9999 flow [2024-06-14 13:55:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:55:43,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 13:55:43,753 INFO L175 Difference]: Start difference. First operand has 427 places, 544 transitions, 8781 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:55:43,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 565 transitions, 9999 flow [2024-06-14 13:55:47,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 565 transitions, 9807 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:47,427 INFO L231 Difference]: Finished difference. Result has 427 places, 546 transitions, 9018 flow [2024-06-14 13:55:47,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8589, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9018, PETRI_PLACES=427, PETRI_TRANSITIONS=546} [2024-06-14 13:55:47,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-14 13:55:47,428 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 546 transitions, 9018 flow [2024-06-14 13:55:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:47,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:47,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:47,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:55:47,428 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:47,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:47,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1347222244, now seen corresponding path program 3 times [2024-06-14 13:55:47,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:47,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916447217] [2024-06-14 13:55:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:47,664 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 13:55:47,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:47,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916447217] [2024-06-14 13:55:47,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916447217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:47,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:47,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:47,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100913815] [2024-06-14 13:55:47,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:47,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:47,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:47,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:47,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:47,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 546 transitions, 9018 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:47,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:47,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:47,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:48,846 INFO L124 PetriNetUnfolderBase]: 3377/5693 cut-off events. [2024-06-14 13:55:48,847 INFO L125 PetriNetUnfolderBase]: For 968036/968039 co-relation queries the response was YES. [2024-06-14 13:55:48,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53377 conditions, 5693 events. 3377/5693 cut-off events. For 968036/968039 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 38624 event pairs, 687 based on Foata normal form. 2/5681 useless extension candidates. Maximal degree in co-relation 53194. Up to 4803 conditions per place. [2024-06-14 13:55:48,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 188 changer transitions 0/575 dead transitions. [2024-06-14 13:55:48,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 575 transitions, 10589 flow [2024-06-14 13:55:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:55:48,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 13:55:48,934 INFO L175 Difference]: Start difference. First operand has 427 places, 546 transitions, 9018 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:55:48,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 575 transitions, 10589 flow [2024-06-14 13:55:53,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 575 transitions, 10176 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:53,073 INFO L231 Difference]: Finished difference. Result has 430 places, 551 transitions, 9138 flow [2024-06-14 13:55:53,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8605, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9138, PETRI_PLACES=430, PETRI_TRANSITIONS=551} [2024-06-14 13:55:53,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-14 13:55:53,073 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 551 transitions, 9138 flow [2024-06-14 13:55:53,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:53,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:53,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:53,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:55:53,074 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:53,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1583694274, now seen corresponding path program 4 times [2024-06-14 13:55:53,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:53,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873620412] [2024-06-14 13:55:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:53,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:53,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873620412] [2024-06-14 13:55:53,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873620412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:53,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:53,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:53,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102466958] [2024-06-14 13:55:53,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:53,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:53,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:53,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 551 transitions, 9138 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:53,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:53,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:53,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:54,473 INFO L124 PetriNetUnfolderBase]: 3385/5695 cut-off events. [2024-06-14 13:55:54,473 INFO L125 PetriNetUnfolderBase]: For 988015/988018 co-relation queries the response was YES. [2024-06-14 13:55:54,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53792 conditions, 5695 events. 3385/5695 cut-off events. For 988015/988018 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38576 event pairs, 681 based on Foata normal form. 2/5683 useless extension candidates. Maximal degree in co-relation 53607. Up to 4896 conditions per place. [2024-06-14 13:55:54,560 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 385 selfloop transitions, 180 changer transitions 0/572 dead transitions. [2024-06-14 13:55:54,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 572 transitions, 10380 flow [2024-06-14 13:55:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:54,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:55:54,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 13:55:54,561 INFO L175 Difference]: Start difference. First operand has 430 places, 551 transitions, 9138 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:55:54,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 572 transitions, 10380 flow [2024-06-14 13:55:59,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 572 transitions, 10071 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 13:55:59,091 INFO L231 Difference]: Finished difference. Result has 434 places, 553 transitions, 9264 flow [2024-06-14 13:55:59,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8843, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9264, PETRI_PLACES=434, PETRI_TRANSITIONS=553} [2024-06-14 13:55:59,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 13:55:59,092 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 553 transitions, 9264 flow [2024-06-14 13:55:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:55:59,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:59,092 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, 1] [2024-06-14 13:55:59,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:55:59,092 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:59,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:59,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2035238428, now seen corresponding path program 12 times [2024-06-14 13:55:59,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:59,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555082539] [2024-06-14 13:55:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:59,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:59,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:59,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555082539] [2024-06-14 13:55:59,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555082539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:59,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:59,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:59,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841722658] [2024-06-14 13:55:59,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:59,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:59,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:59,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:59,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:59,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:55:59,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 553 transitions, 9264 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:59,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:59,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:55:59,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:00,607 INFO L124 PetriNetUnfolderBase]: 3382/5708 cut-off events. [2024-06-14 13:56:00,608 INFO L125 PetriNetUnfolderBase]: For 989058/989058 co-relation queries the response was YES. [2024-06-14 13:56:00,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53975 conditions, 5708 events. 3382/5708 cut-off events. For 989058/989058 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 38820 event pairs, 650 based on Foata normal form. 1/5703 useless extension candidates. Maximal degree in co-relation 53788. Up to 4915 conditions per place. [2024-06-14 13:56:00,696 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 419 selfloop transitions, 155 changer transitions 0/581 dead transitions. [2024-06-14 13:56:00,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 581 transitions, 10698 flow [2024-06-14 13:56:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:56:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:56:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-14 13:56:00,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-14 13:56:00,697 INFO L175 Difference]: Start difference. First operand has 434 places, 553 transitions, 9264 flow. Second operand 11 states and 245 transitions. [2024-06-14 13:56:00,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 581 transitions, 10698 flow [2024-06-14 13:56:04,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 581 transitions, 10293 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:56:04,956 INFO L231 Difference]: Finished difference. Result has 439 places, 553 transitions, 9175 flow [2024-06-14 13:56:04,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8859, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9175, PETRI_PLACES=439, PETRI_TRANSITIONS=553} [2024-06-14 13:56:04,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 13:56:04,957 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 553 transitions, 9175 flow [2024-06-14 13:56:04,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:04,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:04,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:04,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:56:04,958 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:04,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:04,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1875589520, now seen corresponding path program 13 times [2024-06-14 13:56:04,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:04,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001115664] [2024-06-14 13:56:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:04,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:05,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001115664] [2024-06-14 13:56:05,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001115664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:05,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:05,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53222577] [2024-06-14 13:56:05,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:05,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:05,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:05,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:05,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:05,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:56:05,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 553 transitions, 9175 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:05,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:05,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:56:05,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:06,431 INFO L124 PetriNetUnfolderBase]: 3387/5717 cut-off events. [2024-06-14 13:56:06,431 INFO L125 PetriNetUnfolderBase]: For 1005556/1005556 co-relation queries the response was YES. [2024-06-14 13:56:06,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54058 conditions, 5717 events. 3387/5717 cut-off events. For 1005556/1005556 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38946 event pairs, 650 based on Foata normal form. 1/5712 useless extension candidates. Maximal degree in co-relation 53870. Up to 4858 conditions per place. [2024-06-14 13:56:06,519 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 176 changer transitions 0/589 dead transitions. [2024-06-14 13:56:06,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 589 transitions, 10684 flow [2024-06-14 13:56:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-14 13:56:06,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 13:56:06,520 INFO L175 Difference]: Start difference. First operand has 439 places, 553 transitions, 9175 flow. Second operand 10 states and 235 transitions. [2024-06-14 13:56:06,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 589 transitions, 10684 flow [2024-06-14 13:56:10,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 589 transitions, 10500 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:56:10,909 INFO L231 Difference]: Finished difference. Result has 443 places, 556 transitions, 9392 flow [2024-06-14 13:56:10,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8994, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9392, PETRI_PLACES=443, PETRI_TRANSITIONS=556} [2024-06-14 13:56:10,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-14 13:56:10,909 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 556 transitions, 9392 flow [2024-06-14 13:56:10,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:10,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:10,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:10,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:56:10,910 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:10,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:10,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2105678360, now seen corresponding path program 10 times [2024-06-14 13:56:10,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:10,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899047370] [2024-06-14 13:56:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:10,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:11,179 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 13:56:11,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:11,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899047370] [2024-06-14 13:56:11,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899047370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:11,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:11,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:11,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423808674] [2024-06-14 13:56:11,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:11,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:11,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:11,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:11,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:11,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:56:11,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 556 transitions, 9392 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:11,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:11,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:56:11,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:12,416 INFO L124 PetriNetUnfolderBase]: 3397/5735 cut-off events. [2024-06-14 13:56:12,416 INFO L125 PetriNetUnfolderBase]: For 1031093/1031093 co-relation queries the response was YES. [2024-06-14 13:56:12,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54471 conditions, 5735 events. 3397/5735 cut-off events. For 1031093/1031093 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39060 event pairs, 652 based on Foata normal form. 2/5731 useless extension candidates. Maximal degree in co-relation 54282. Up to 4465 conditions per place. [2024-06-14 13:56:12,503 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 310 changer transitions 0/594 dead transitions. [2024-06-14 13:56:12,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 594 transitions, 11162 flow [2024-06-14 13:56:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-14 13:56:12,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-14 13:56:12,504 INFO L175 Difference]: Start difference. First operand has 443 places, 556 transitions, 9392 flow. Second operand 10 states and 243 transitions. [2024-06-14 13:56:12,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 594 transitions, 11162 flow [2024-06-14 13:56:16,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 594 transitions, 10891 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:16,864 INFO L231 Difference]: Finished difference. Result has 446 places, 560 transitions, 9816 flow [2024-06-14 13:56:16,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9121, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9816, PETRI_PLACES=446, PETRI_TRANSITIONS=560} [2024-06-14 13:56:16,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-14 13:56:16,865 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 560 transitions, 9816 flow [2024-06-14 13:56:16,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:16,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:16,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:16,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:56:16,865 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:16,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2094429266, now seen corresponding path program 14 times [2024-06-14 13:56:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:16,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260453826] [2024-06-14 13:56:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:17,131 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 13:56:17,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:17,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260453826] [2024-06-14 13:56:17,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260453826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:17,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:17,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:17,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951575110] [2024-06-14 13:56:17,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:17,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:17,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:17,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:17,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:17,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:56:17,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 560 transitions, 9816 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:17,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:17,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:56:17,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:18,481 INFO L124 PetriNetUnfolderBase]: 3394/5731 cut-off events. [2024-06-14 13:56:18,481 INFO L125 PetriNetUnfolderBase]: For 1037658/1037658 co-relation queries the response was YES. [2024-06-14 13:56:18,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54884 conditions, 5731 events. 3394/5731 cut-off events. For 1037658/1037658 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39105 event pairs, 650 based on Foata normal form. 1/5726 useless extension candidates. Maximal degree in co-relation 54694. Up to 4869 conditions per place. [2024-06-14 13:56:18,563 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 177 changer transitions 0/597 dead transitions. [2024-06-14 13:56:18,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 597 transitions, 11534 flow [2024-06-14 13:56:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:56:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:56:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 291 transitions. [2024-06-14 13:56:18,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532967032967033 [2024-06-14 13:56:18,564 INFO L175 Difference]: Start difference. First operand has 446 places, 560 transitions, 9816 flow. Second operand 13 states and 291 transitions. [2024-06-14 13:56:18,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 597 transitions, 11534 flow [2024-06-14 13:56:23,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 597 transitions, 10715 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-14 13:56:23,544 INFO L231 Difference]: Finished difference. Result has 449 places, 560 transitions, 9357 flow [2024-06-14 13:56:23,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8997, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9357, PETRI_PLACES=449, PETRI_TRANSITIONS=560} [2024-06-14 13:56:23,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-14 13:56:23,545 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 560 transitions, 9357 flow [2024-06-14 13:56:23,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:23,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:23,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:23,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:56:23,546 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:23,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:23,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1541147292, now seen corresponding path program 11 times [2024-06-14 13:56:23,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:23,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106335728] [2024-06-14 13:56:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:23,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:23,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:23,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106335728] [2024-06-14 13:56:23,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106335728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:23,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:23,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:23,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667649870] [2024-06-14 13:56:23,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:23,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:23,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:23,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:23,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:56:23,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 560 transitions, 9357 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:23,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:23,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:56:23,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:25,227 INFO L124 PetriNetUnfolderBase]: 3404/5737 cut-off events. [2024-06-14 13:56:25,227 INFO L125 PetriNetUnfolderBase]: For 1060365/1060365 co-relation queries the response was YES. [2024-06-14 13:56:25,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54472 conditions, 5737 events. 3404/5737 cut-off events. For 1060365/1060365 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39015 event pairs, 642 based on Foata normal form. 2/5733 useless extension candidates. Maximal degree in co-relation 54282. Up to 4473 conditions per place. [2024-06-14 13:56:25,307 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 279 selfloop transitions, 315 changer transitions 0/601 dead transitions. [2024-06-14 13:56:25,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 601 transitions, 11367 flow [2024-06-14 13:56:25,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:56:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:56:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 285 transitions. [2024-06-14 13:56:25,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-14 13:56:25,308 INFO L175 Difference]: Start difference. First operand has 449 places, 560 transitions, 9357 flow. Second operand 12 states and 285 transitions. [2024-06-14 13:56:25,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 601 transitions, 11367 flow [2024-06-14 13:56:30,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 601 transitions, 10923 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-14 13:56:30,028 INFO L231 Difference]: Finished difference. Result has 449 places, 564 transitions, 9604 flow [2024-06-14 13:56:30,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8913, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9604, PETRI_PLACES=449, PETRI_TRANSITIONS=564} [2024-06-14 13:56:30,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-14 13:56:30,029 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 564 transitions, 9604 flow [2024-06-14 13:56:30,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:30,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:30,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:30,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:56:30,029 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:30,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:30,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1884843950, now seen corresponding path program 15 times [2024-06-14 13:56:30,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:30,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297799757] [2024-06-14 13:56:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:30,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:30,295 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 13:56:30,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:30,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297799757] [2024-06-14 13:56:30,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297799757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:30,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:30,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:30,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418540054] [2024-06-14 13:56:30,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:30,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:30,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:30,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:56:30,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 564 transitions, 9604 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:30,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:30,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:56:30,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:31,584 INFO L124 PetriNetUnfolderBase]: 3401/5745 cut-off events. [2024-06-14 13:56:31,584 INFO L125 PetriNetUnfolderBase]: For 1063553/1063553 co-relation queries the response was YES. [2024-06-14 13:56:31,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54811 conditions, 5745 events. 3401/5745 cut-off events. For 1063553/1063553 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39167 event pairs, 650 based on Foata normal form. 1/5740 useless extension candidates. Maximal degree in co-relation 54620. Up to 4880 conditions per place. [2024-06-14 13:56:31,676 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 177 changer transitions 0/602 dead transitions. [2024-06-14 13:56:31,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 602 transitions, 11114 flow [2024-06-14 13:56:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:56:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:56:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 327 transitions. [2024-06-14 13:56:31,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-14 13:56:31,677 INFO L175 Difference]: Start difference. First operand has 449 places, 564 transitions, 9604 flow. Second operand 15 states and 327 transitions. [2024-06-14 13:56:31,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 602 transitions, 11114 flow [2024-06-14 13:56:36,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 602 transitions, 10456 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 13:56:36,633 INFO L231 Difference]: Finished difference. Result has 455 places, 564 transitions, 9306 flow [2024-06-14 13:56:36,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8946, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9306, PETRI_PLACES=455, PETRI_TRANSITIONS=564} [2024-06-14 13:56:36,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-14 13:56:36,634 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 564 transitions, 9306 flow [2024-06-14 13:56:36,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:36,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:36,634 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] [2024-06-14 13:56:36,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:56:36,634 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:36,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2094250520, now seen corresponding path program 12 times [2024-06-14 13:56:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:36,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451196696] [2024-06-14 13:56:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:36,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:36,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:36,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451196696] [2024-06-14 13:56:36,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451196696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:36,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:36,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:36,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609499392] [2024-06-14 13:56:36,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:36,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:36,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:36,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:56:36,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 564 transitions, 9306 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:36,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:36,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:56:36,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:38,144 INFO L124 PetriNetUnfolderBase]: 3395/5737 cut-off events. [2024-06-14 13:56:38,144 INFO L125 PetriNetUnfolderBase]: For 1072974/1072974 co-relation queries the response was YES. [2024-06-14 13:56:38,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54304 conditions, 5737 events. 3395/5737 cut-off events. For 1072974/1072974 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39138 event pairs, 652 based on Foata normal form. 2/5733 useless extension candidates. Maximal degree in co-relation 54112. Up to 4466 conditions per place. [2024-06-14 13:56:38,234 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 317 changer transitions 0/601 dead transitions. [2024-06-14 13:56:38,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 601 transitions, 11044 flow [2024-06-14 13:56:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:56:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:56:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 300 transitions. [2024-06-14 13:56:38,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-14 13:56:38,235 INFO L175 Difference]: Start difference. First operand has 455 places, 564 transitions, 9306 flow. Second operand 13 states and 300 transitions. [2024-06-14 13:56:38,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 601 transitions, 11044 flow [2024-06-14 13:56:43,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 601 transitions, 10590 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-14 13:56:43,338 INFO L231 Difference]: Finished difference. Result has 454 places, 564 transitions, 9493 flow [2024-06-14 13:56:43,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8852, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9493, PETRI_PLACES=454, PETRI_TRANSITIONS=564} [2024-06-14 13:56:43,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-14 13:56:43,339 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 564 transitions, 9493 flow [2024-06-14 13:56:43,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:43,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:43,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:43,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:56:43,340 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:43,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash -17517562, now seen corresponding path program 13 times [2024-06-14 13:56:43,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:43,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867354986] [2024-06-14 13:56:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:43,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:43,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:43,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867354986] [2024-06-14 13:56:43,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867354986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:43,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:43,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:43,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971375791] [2024-06-14 13:56:43,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:43,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:43,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:43,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:43,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:56:43,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 564 transitions, 9493 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:43,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:43,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:56:43,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:44,833 INFO L124 PetriNetUnfolderBase]: 3437/5816 cut-off events. [2024-06-14 13:56:44,833 INFO L125 PetriNetUnfolderBase]: For 1117989/1117989 co-relation queries the response was YES. [2024-06-14 13:56:44,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55727 conditions, 5816 events. 3437/5816 cut-off events. For 1117989/1117989 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39779 event pairs, 644 based on Foata normal form. 2/5815 useless extension candidates. Maximal degree in co-relation 55534. Up to 5148 conditions per place. [2024-06-14 13:56:44,925 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 515 selfloop transitions, 75 changer transitions 0/597 dead transitions. [2024-06-14 13:56:44,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 597 transitions, 11670 flow [2024-06-14 13:56:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 13:56:44,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-14 13:56:44,926 INFO L175 Difference]: Start difference. First operand has 454 places, 564 transitions, 9493 flow. Second operand 9 states and 205 transitions. [2024-06-14 13:56:44,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 597 transitions, 11670 flow [2024-06-14 13:56:50,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 597 transitions, 10981 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-14 13:56:50,226 INFO L231 Difference]: Finished difference. Result has 451 places, 578 transitions, 9261 flow [2024-06-14 13:56:50,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8832, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9261, PETRI_PLACES=451, PETRI_TRANSITIONS=578} [2024-06-14 13:56:50,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-14 13:56:50,227 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 578 transitions, 9261 flow [2024-06-14 13:56:50,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:50,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:50,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:50,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:56:50,227 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:50,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash -17696308, now seen corresponding path program 16 times [2024-06-14 13:56:50,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:50,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630446294] [2024-06-14 13:56:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:50,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:50,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:50,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630446294] [2024-06-14 13:56:50,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630446294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:50,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:50,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:50,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032915047] [2024-06-14 13:56:50,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:50,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:50,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:50,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:50,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:56:50,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 578 transitions, 9261 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:50,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:50,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:56:50,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:51,748 INFO L124 PetriNetUnfolderBase]: 3439/5821 cut-off events. [2024-06-14 13:56:51,748 INFO L125 PetriNetUnfolderBase]: For 1126383/1126383 co-relation queries the response was YES. [2024-06-14 13:56:51,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55189 conditions, 5821 events. 3439/5821 cut-off events. For 1126383/1126383 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 39865 event pairs, 644 based on Foata normal form. 2/5820 useless extension candidates. Maximal degree in co-relation 54994. Up to 5204 conditions per place. [2024-06-14 13:56:51,839 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 532 selfloop transitions, 58 changer transitions 0/597 dead transitions. [2024-06-14 13:56:51,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 597 transitions, 10766 flow [2024-06-14 13:56:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:56:51,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-14 13:56:51,839 INFO L175 Difference]: Start difference. First operand has 451 places, 578 transitions, 9261 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:56:51,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 597 transitions, 10766 flow [2024-06-14 13:56:57,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 597 transitions, 10666 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 13:56:57,618 INFO L231 Difference]: Finished difference. Result has 456 places, 581 transitions, 9340 flow [2024-06-14 13:56:57,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9161, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9340, PETRI_PLACES=456, PETRI_TRANSITIONS=581} [2024-06-14 13:56:57,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-14 13:56:57,619 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 581 transitions, 9340 flow [2024-06-14 13:56:57,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:57,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:57,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:57,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:56:57,619 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:57,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:57,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1973823116, now seen corresponding path program 17 times [2024-06-14 13:56:57,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:57,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106099944] [2024-06-14 13:56:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:57,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:57,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:57,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106099944] [2024-06-14 13:56:57,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106099944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:57,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:57,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:57,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448176816] [2024-06-14 13:56:57,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:57,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:57,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:57,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:56:57,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 581 transitions, 9340 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:57,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:57,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:56:57,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:59,198 INFO L124 PetriNetUnfolderBase]: 3433/5809 cut-off events. [2024-06-14 13:56:59,198 INFO L125 PetriNetUnfolderBase]: For 1130330/1130330 co-relation queries the response was YES. [2024-06-14 13:56:59,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55070 conditions, 5809 events. 3433/5809 cut-off events. For 1130330/1130330 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39709 event pairs, 642 based on Foata normal form. 2/5808 useless extension candidates. Maximal degree in co-relation 54873. Up to 5198 conditions per place. [2024-06-14 13:56:59,294 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 533 selfloop transitions, 56 changer transitions 0/596 dead transitions. [2024-06-14 13:56:59,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 596 transitions, 10554 flow [2024-06-14 13:56:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 13:56:59,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-14 13:56:59,295 INFO L175 Difference]: Start difference. First operand has 456 places, 581 transitions, 9340 flow. Second operand 8 states and 181 transitions. [2024-06-14 13:56:59,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 596 transitions, 10554 flow [2024-06-14 13:57:05,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 596 transitions, 10410 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:05,510 INFO L231 Difference]: Finished difference. Result has 458 places, 581 transitions, 9318 flow [2024-06-14 13:57:05,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9196, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9318, PETRI_PLACES=458, PETRI_TRANSITIONS=581} [2024-06-14 13:57:05,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-14 13:57:05,510 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 581 transitions, 9318 flow [2024-06-14 13:57:05,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:05,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:05,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:05,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:57:05,511 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:05,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash -305429488, now seen corresponding path program 14 times [2024-06-14 13:57:05,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:05,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219568728] [2024-06-14 13:57:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:05,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:05,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:05,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219568728] [2024-06-14 13:57:05,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219568728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:05,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:05,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:05,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134446542] [2024-06-14 13:57:05,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:05,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:05,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:05,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:05,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:57:05,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 581 transitions, 9318 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:05,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:05,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:57:05,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:07,074 INFO L124 PetriNetUnfolderBase]: 3427/5813 cut-off events. [2024-06-14 13:57:07,074 INFO L125 PetriNetUnfolderBase]: For 1133861/1133861 co-relation queries the response was YES. [2024-06-14 13:57:07,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54928 conditions, 5813 events. 3427/5813 cut-off events. For 1133861/1133861 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39859 event pairs, 652 based on Foata normal form. 2/5812 useless extension candidates. Maximal degree in co-relation 54730. Up to 5142 conditions per place. [2024-06-14 13:57:07,171 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 512 selfloop transitions, 80 changer transitions 0/599 dead transitions. [2024-06-14 13:57:07,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 599 transitions, 11020 flow [2024-06-14 13:57:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-14 13:57:07,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-14 13:57:07,172 INFO L175 Difference]: Start difference. First operand has 458 places, 581 transitions, 9318 flow. Second operand 9 states and 203 transitions. [2024-06-14 13:57:07,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 599 transitions, 11020 flow [2024-06-14 13:57:13,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 599 transitions, 10872 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:13,192 INFO L231 Difference]: Finished difference. Result has 460 places, 581 transitions, 9337 flow [2024-06-14 13:57:13,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9170, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9337, PETRI_PLACES=460, PETRI_TRANSITIONS=581} [2024-06-14 13:57:13,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-14 13:57:13,193 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 581 transitions, 9337 flow [2024-06-14 13:57:13,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:13,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:13,193 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] [2024-06-14 13:57:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 13:57:13,193 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:13,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash -597324938, now seen corresponding path program 15 times [2024-06-14 13:57:13,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:13,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302821650] [2024-06-14 13:57:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:13,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:13,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302821650] [2024-06-14 13:57:13,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302821650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:13,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:13,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:13,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593379738] [2024-06-14 13:57:13,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:13,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:13,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:57:13,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 581 transitions, 9337 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:13,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:13,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:57:13,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:14,776 INFO L124 PetriNetUnfolderBase]: 3461/5846 cut-off events. [2024-06-14 13:57:14,777 INFO L125 PetriNetUnfolderBase]: For 1176320/1176320 co-relation queries the response was YES. [2024-06-14 13:57:14,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55834 conditions, 5846 events. 3461/5846 cut-off events. For 1176320/1176320 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 39979 event pairs, 632 based on Foata normal form. 2/5845 useless extension candidates. Maximal degree in co-relation 55635. Up to 4829 conditions per place. [2024-06-14 13:57:14,875 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 425 selfloop transitions, 193 changer transitions 0/625 dead transitions. [2024-06-14 13:57:14,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 625 transitions, 11595 flow [2024-06-14 13:57:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 13:57:14,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 13:57:14,876 INFO L175 Difference]: Start difference. First operand has 460 places, 581 transitions, 9337 flow. Second operand 9 states and 222 transitions. [2024-06-14 13:57:14,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 625 transitions, 11595 flow [2024-06-14 13:57:20,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 625 transitions, 11449 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:20,935 INFO L231 Difference]: Finished difference. Result has 463 places, 594 transitions, 9938 flow [2024-06-14 13:57:20,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9191, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9938, PETRI_PLACES=463, PETRI_TRANSITIONS=594} [2024-06-14 13:57:20,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-14 13:57:20,936 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 594 transitions, 9938 flow [2024-06-14 13:57:20,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:20,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:20,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:20,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 13:57:20,936 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:20,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:20,936 INFO L85 PathProgramCache]: Analyzing trace with hash 714734632, now seen corresponding path program 16 times [2024-06-14 13:57:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289655951] [2024-06-14 13:57:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:21,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:21,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289655951] [2024-06-14 13:57:21,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289655951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:21,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:21,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630108425] [2024-06-14 13:57:21,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:21,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:21,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:21,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:57:21,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 594 transitions, 9938 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:21,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:21,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:57:21,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:22,514 INFO L124 PetriNetUnfolderBase]: 3466/5868 cut-off events. [2024-06-14 13:57:22,515 INFO L125 PetriNetUnfolderBase]: For 1188278/1188281 co-relation queries the response was YES. [2024-06-14 13:57:22,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56733 conditions, 5868 events. 3466/5868 cut-off events. For 1188278/1188281 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40249 event pairs, 651 based on Foata normal form. 3/5867 useless extension candidates. Maximal degree in co-relation 56532. Up to 4833 conditions per place. [2024-06-14 13:57:22,612 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 206 changer transitions 0/628 dead transitions. [2024-06-14 13:57:22,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 628 transitions, 12291 flow [2024-06-14 13:57:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 13:57:22,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-14 13:57:22,613 INFO L175 Difference]: Start difference. First operand has 463 places, 594 transitions, 9938 flow. Second operand 8 states and 203 transitions. [2024-06-14 13:57:22,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 628 transitions, 12291 flow [2024-06-14 13:57:28,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 628 transitions, 12153 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 13:57:28,408 INFO L231 Difference]: Finished difference. Result has 467 places, 597 transitions, 10293 flow [2024-06-14 13:57:28,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9808, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10293, PETRI_PLACES=467, PETRI_TRANSITIONS=597} [2024-06-14 13:57:28,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-14 13:57:28,409 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 597 transitions, 10293 flow [2024-06-14 13:57:28,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:28,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:28,409 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] [2024-06-14 13:57:28,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 13:57:28,409 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:28,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash 714734446, now seen corresponding path program 18 times [2024-06-14 13:57:28,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:28,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349791071] [2024-06-14 13:57:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:28,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:28,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:28,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349791071] [2024-06-14 13:57:28,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349791071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:28,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:28,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:28,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791323749] [2024-06-14 13:57:28,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:28,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:28,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:28,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:28,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:28,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:57:28,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 597 transitions, 10293 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:28,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:28,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:57:28,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:30,059 INFO L124 PetriNetUnfolderBase]: 3476/5897 cut-off events. [2024-06-14 13:57:30,059 INFO L125 PetriNetUnfolderBase]: For 1196354/1196354 co-relation queries the response was YES. [2024-06-14 13:57:30,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57359 conditions, 5897 events. 3476/5897 cut-off events. For 1196354/1196354 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 40559 event pairs, 652 based on Foata normal form. 2/5896 useless extension candidates. Maximal degree in co-relation 57157. Up to 4996 conditions per place. [2024-06-14 13:57:30,155 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 474 selfloop transitions, 154 changer transitions 0/635 dead transitions. [2024-06-14 13:57:30,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 635 transitions, 12233 flow [2024-06-14 13:57:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 13:57:30,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 13:57:30,156 INFO L175 Difference]: Start difference. First operand has 467 places, 597 transitions, 10293 flow. Second operand 8 states and 204 transitions. [2024-06-14 13:57:30,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 635 transitions, 12233 flow [2024-06-14 13:57:36,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 635 transitions, 11638 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 13:57:36,160 INFO L231 Difference]: Finished difference. Result has 467 places, 603 transitions, 10151 flow [2024-06-14 13:57:36,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9710, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10151, PETRI_PLACES=467, PETRI_TRANSITIONS=603} [2024-06-14 13:57:36,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-14 13:57:36,161 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 603 transitions, 10151 flow [2024-06-14 13:57:36,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:36,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:36,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:36,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 13:57:36,161 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:36,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash 715120582, now seen corresponding path program 17 times [2024-06-14 13:57:36,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:36,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674695108] [2024-06-14 13:57:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:36,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:36,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:36,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674695108] [2024-06-14 13:57:36,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674695108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:36,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:36,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:36,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382129030] [2024-06-14 13:57:36,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:36,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:36,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:57:36,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 603 transitions, 10151 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:36,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:36,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:57:36,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:37,831 INFO L124 PetriNetUnfolderBase]: 3489/5913 cut-off events. [2024-06-14 13:57:37,831 INFO L125 PetriNetUnfolderBase]: For 1216427/1216430 co-relation queries the response was YES. [2024-06-14 13:57:37,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57610 conditions, 5913 events. 3489/5913 cut-off events. For 1216427/1216430 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40641 event pairs, 653 based on Foata normal form. 3/5912 useless extension candidates. Maximal degree in co-relation 57407. Up to 4856 conditions per place. [2024-06-14 13:57:37,924 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 216 changer transitions 0/637 dead transitions. [2024-06-14 13:57:37,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 637 transitions, 12586 flow [2024-06-14 13:57:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:37,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 13:57:37,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-14 13:57:37,925 INFO L175 Difference]: Start difference. First operand has 467 places, 603 transitions, 10151 flow. Second operand 8 states and 199 transitions. [2024-06-14 13:57:37,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 637 transitions, 12586 flow [2024-06-14 13:57:43,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 637 transitions, 12392 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:43,704 INFO L231 Difference]: Finished difference. Result has 469 places, 609 transitions, 10542 flow [2024-06-14 13:57:43,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9973, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10542, PETRI_PLACES=469, PETRI_TRANSITIONS=609} [2024-06-14 13:57:43,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-14 13:57:43,705 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 609 transitions, 10542 flow [2024-06-14 13:57:43,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:43,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:43,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:43,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 13:57:43,705 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:43,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash 943021732, now seen corresponding path program 18 times [2024-06-14 13:57:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:43,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572855018] [2024-06-14 13:57:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:43,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:43,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:43,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572855018] [2024-06-14 13:57:43,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572855018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:43,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:43,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:43,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090675327] [2024-06-14 13:57:43,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:43,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:43,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:43,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:43,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:44,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:57:44,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 609 transitions, 10542 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:44,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:44,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:57:44,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:45,373 INFO L124 PetriNetUnfolderBase]: 3486/5904 cut-off events. [2024-06-14 13:57:45,373 INFO L125 PetriNetUnfolderBase]: For 1193851/1193854 co-relation queries the response was YES. [2024-06-14 13:57:45,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57541 conditions, 5904 events. 3486/5904 cut-off events. For 1193851/1193854 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 40559 event pairs, 651 based on Foata normal form. 3/5903 useless extension candidates. Maximal degree in co-relation 57339. Up to 4854 conditions per place. [2024-06-14 13:57:45,468 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 216 changer transitions 0/634 dead transitions. [2024-06-14 13:57:45,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 634 transitions, 12824 flow [2024-06-14 13:57:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:57:45,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 13:57:45,469 INFO L175 Difference]: Start difference. First operand has 469 places, 609 transitions, 10542 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:57:45,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 634 transitions, 12824 flow [2024-06-14 13:57:51,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 634 transitions, 12370 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 13:57:51,103 INFO L231 Difference]: Finished difference. Result has 473 places, 609 transitions, 10526 flow [2024-06-14 13:57:51,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10088, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10526, PETRI_PLACES=473, PETRI_TRANSITIONS=609} [2024-06-14 13:57:51,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-14 13:57:51,103 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 609 transitions, 10526 flow [2024-06-14 13:57:51,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:51,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:51,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:51,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 13:57:51,104 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:51,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1740402060, now seen corresponding path program 19 times [2024-06-14 13:57:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:51,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933414554] [2024-06-14 13:57:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:51,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:51,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:51,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933414554] [2024-06-14 13:57:51,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933414554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:51,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:51,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:51,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736851927] [2024-06-14 13:57:51,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:51,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:51,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:51,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:51,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:51,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:57:51,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 609 transitions, 10526 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:51,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:51,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:57:51,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:52,810 INFO L124 PetriNetUnfolderBase]: 3480/5899 cut-off events. [2024-06-14 13:57:52,810 INFO L125 PetriNetUnfolderBase]: For 1204052/1204052 co-relation queries the response was YES. [2024-06-14 13:57:52,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57334 conditions, 5899 events. 3480/5899 cut-off events. For 1204052/1204052 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40558 event pairs, 644 based on Foata normal form. 2/5898 useless extension candidates. Maximal degree in co-relation 57131. Up to 5004 conditions per place. [2024-06-14 13:57:52,902 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 472 selfloop transitions, 161 changer transitions 0/640 dead transitions. [2024-06-14 13:57:52,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 640 transitions, 12114 flow [2024-06-14 13:57:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 13:57:52,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-14 13:57:52,902 INFO L175 Difference]: Start difference. First operand has 473 places, 609 transitions, 10526 flow. Second operand 8 states and 203 transitions. [2024-06-14 13:57:52,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 640 transitions, 12114 flow [2024-06-14 13:57:59,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 640 transitions, 11588 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:59,139 INFO L231 Difference]: Finished difference. Result has 474 places, 609 transitions, 10345 flow [2024-06-14 13:57:59,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10000, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10345, PETRI_PLACES=474, PETRI_TRANSITIONS=609} [2024-06-14 13:57:59,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-14 13:57:59,139 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 609 transitions, 10345 flow [2024-06-14 13:57:59,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:59,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:59,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:59,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 13:57:59,140 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:59,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1977746284, now seen corresponding path program 19 times [2024-06-14 13:57:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:59,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920776977] [2024-06-14 13:57:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:59,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:59,418 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 13:57:59,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:59,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920776977] [2024-06-14 13:57:59,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920776977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:59,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:59,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:59,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432898896] [2024-06-14 13:57:59,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:59,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:59,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:59,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:59,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:59,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:57:59,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 609 transitions, 10345 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:59,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:59,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:57:59,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:00,857 INFO L124 PetriNetUnfolderBase]: 3490/5899 cut-off events. [2024-06-14 13:58:00,857 INFO L125 PetriNetUnfolderBase]: For 1214189/1214189 co-relation queries the response was YES. [2024-06-14 13:58:00,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57389 conditions, 5899 events. 3490/5899 cut-off events. For 1214189/1214189 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40443 event pairs, 632 based on Foata normal form. 1/5897 useless extension candidates. Maximal degree in co-relation 57185. Up to 5296 conditions per place. [2024-06-14 13:58:00,949 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 590 selfloop transitions, 35 changer transitions 0/632 dead transitions. [2024-06-14 13:58:00,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 632 transitions, 11731 flow [2024-06-14 13:58:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:58:00,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 13:58:00,950 INFO L175 Difference]: Start difference. First operand has 474 places, 609 transitions, 10345 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:58:00,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 632 transitions, 11731 flow [2024-06-14 13:58:06,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 632 transitions, 11346 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:58:06,249 INFO L231 Difference]: Finished difference. Result has 472 places, 615 transitions, 10136 flow [2024-06-14 13:58:06,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9960, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10136, PETRI_PLACES=472, PETRI_TRANSITIONS=615} [2024-06-14 13:58:06,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-14 13:58:06,249 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 615 transitions, 10136 flow [2024-06-14 13:58:06,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:06,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:06,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:06,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 13:58:06,250 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:06,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash 567362182, now seen corresponding path program 20 times [2024-06-14 13:58:06,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:06,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444827059] [2024-06-14 13:58:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:06,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:06,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:06,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444827059] [2024-06-14 13:58:06,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444827059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:06,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:06,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:58:06,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006406162] [2024-06-14 13:58:06,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:06,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:58:06,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:58:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:58:06,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:58:06,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 615 transitions, 10136 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:06,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:06,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:58:06,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:08,005 INFO L124 PetriNetUnfolderBase]: 3487/5907 cut-off events. [2024-06-14 13:58:08,005 INFO L125 PetriNetUnfolderBase]: For 1182560/1182560 co-relation queries the response was YES. [2024-06-14 13:58:08,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56661 conditions, 5907 events. 3487/5907 cut-off events. For 1182560/1182560 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40600 event pairs, 642 based on Foata normal form. 1/5905 useless extension candidates. Maximal degree in co-relation 56458. Up to 5249 conditions per place. [2024-06-14 13:58:08,094 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 566 selfloop transitions, 64 changer transitions 0/637 dead transitions. [2024-06-14 13:58:08,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 637 transitions, 11694 flow [2024-06-14 13:58:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:58:08,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 13:58:08,101 INFO L175 Difference]: Start difference. First operand has 472 places, 615 transitions, 10136 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:58:08,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 637 transitions, 11694 flow [2024-06-14 13:58:14,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 637 transitions, 11582 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:58:14,398 INFO L231 Difference]: Finished difference. Result has 476 places, 615 transitions, 10166 flow [2024-06-14 13:58:14,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10024, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10166, PETRI_PLACES=476, PETRI_TRANSITIONS=615} [2024-06-14 13:58:14,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-14 13:58:14,399 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 615 transitions, 10166 flow [2024-06-14 13:58:14,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:14,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:14,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:14,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 13:58:14,400 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:14,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1035280028, now seen corresponding path program 21 times [2024-06-14 13:58:14,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:14,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202438129] [2024-06-14 13:58:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:14,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:14,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202438129] [2024-06-14 13:58:14,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202438129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:14,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:14,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:58:14,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023671178] [2024-06-14 13:58:14,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:14,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:58:14,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:14,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:58:14,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:58:14,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:58:14,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 615 transitions, 10166 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:14,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:14,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:58:14,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:16,129 INFO L124 PetriNetUnfolderBase]: 3484/5903 cut-off events. [2024-06-14 13:58:16,129 INFO L125 PetriNetUnfolderBase]: For 1194014/1194014 co-relation queries the response was YES. [2024-06-14 13:58:16,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56703 conditions, 5903 events. 3484/5903 cut-off events. For 1194014/1194014 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40565 event pairs, 642 based on Foata normal form. 1/5901 useless extension candidates. Maximal degree in co-relation 56499. Up to 5246 conditions per place. [2024-06-14 13:58:16,217 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 565 selfloop transitions, 62 changer transitions 0/634 dead transitions. [2024-06-14 13:58:16,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 634 transitions, 11468 flow [2024-06-14 13:58:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:58:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:58:16,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:58:16,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 13:58:16,218 INFO L175 Difference]: Start difference. First operand has 476 places, 615 transitions, 10166 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:58:16,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 634 transitions, 11468 flow [2024-06-14 13:58:22,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 634 transitions, 11264 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 13:58:22,718 INFO L231 Difference]: Finished difference. Result has 473 places, 615 transitions, 10096 flow [2024-06-14 13:58:22,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9962, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10096, PETRI_PLACES=473, PETRI_TRANSITIONS=615} [2024-06-14 13:58:22,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-14 13:58:22,718 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 615 transitions, 10096 flow [2024-06-14 13:58:22,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:22,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:22,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 13:58:22,719 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:22,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 567124846, now seen corresponding path program 20 times [2024-06-14 13:58:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:22,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479208326] [2024-06-14 13:58:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:22,989 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 13:58:22,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:22,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479208326] [2024-06-14 13:58:22,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479208326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:22,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:22,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:22,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595611536] [2024-06-14 13:58:22,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:22,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:22,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:22,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:22,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:23,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:58:23,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 615 transitions, 10096 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:23,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:23,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:58:23,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:24,442 INFO L124 PetriNetUnfolderBase]: 3478/5907 cut-off events. [2024-06-14 13:58:24,442 INFO L125 PetriNetUnfolderBase]: For 1165372/1165372 co-relation queries the response was YES. [2024-06-14 13:58:24,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56212 conditions, 5907 events. 3478/5907 cut-off events. For 1165372/1165372 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40679 event pairs, 652 based on Foata normal form. 2/5906 useless extension candidates. Maximal degree in co-relation 56008. Up to 5163 conditions per place. [2024-06-14 13:58:24,529 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 552 selfloop transitions, 80 changer transitions 0/639 dead transitions. [2024-06-14 13:58:24,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 639 transitions, 11450 flow [2024-06-14 13:58:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:58:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:58:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 13:58:24,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-14 13:58:24,530 INFO L175 Difference]: Start difference. First operand has 473 places, 615 transitions, 10096 flow. Second operand 6 states and 157 transitions. [2024-06-14 13:58:24,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 639 transitions, 11450 flow [2024-06-14 13:58:31,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 639 transitions, 11194 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:31,053 INFO L231 Difference]: Finished difference. Result has 473 places, 617 transitions, 10121 flow [2024-06-14 13:58:31,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9840, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10121, PETRI_PLACES=473, PETRI_TRANSITIONS=617} [2024-06-14 13:58:31,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-14 13:58:31,053 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 617 transitions, 10121 flow [2024-06-14 13:58:31,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:31,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:31,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:31,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 13:58:31,054 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:31,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash 167103184, now seen corresponding path program 22 times [2024-06-14 13:58:31,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:31,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457166339] [2024-06-14 13:58:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:31,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:31,315 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 13:58:31,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457166339] [2024-06-14 13:58:31,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457166339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:31,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:31,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:58:31,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060033709] [2024-06-14 13:58:31,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:31,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:58:31,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:58:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:58:31,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:58:31,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 617 transitions, 10121 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:31,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:31,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:58:31,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:32,810 INFO L124 PetriNetUnfolderBase]: 3472/5875 cut-off events. [2024-06-14 13:58:32,810 INFO L125 PetriNetUnfolderBase]: For 1155877/1155877 co-relation queries the response was YES. [2024-06-14 13:58:32,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56070 conditions, 5875 events. 3472/5875 cut-off events. For 1155877/1155877 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40297 event pairs, 632 based on Foata normal form. 2/5874 useless extension candidates. Maximal degree in co-relation 55865. Up to 4843 conditions per place. [2024-06-14 13:58:32,897 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 425 selfloop transitions, 218 changer transitions 0/650 dead transitions. [2024-06-14 13:58:32,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 650 transitions, 11977 flow [2024-06-14 13:58:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:58:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:58:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 13:58:32,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-14 13:58:32,898 INFO L175 Difference]: Start difference. First operand has 473 places, 617 transitions, 10121 flow. Second operand 9 states and 224 transitions. [2024-06-14 13:58:32,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 650 transitions, 11977 flow [2024-06-14 13:58:37,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 650 transitions, 11642 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 13:58:37,490 INFO L231 Difference]: Finished difference. Result has 474 places, 617 transitions, 10238 flow [2024-06-14 13:58:37,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9790, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10238, PETRI_PLACES=474, PETRI_TRANSITIONS=617} [2024-06-14 13:58:37,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-14 13:58:37,490 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 617 transitions, 10238 flow [2024-06-14 13:58:37,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:37,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:37,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:37,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 13:58:37,491 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:37,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash 567032776, now seen corresponding path program 3 times [2024-06-14 13:58:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:37,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416735508] [2024-06-14 13:58:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:37,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:37,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:37,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416735508] [2024-06-14 13:58:37,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416735508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:37,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:37,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:58:37,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645398723] [2024-06-14 13:58:37,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:37,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:58:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:58:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:58:37,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:58:37,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 617 transitions, 10238 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:37,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:37,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:58:37,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:39,227 INFO L124 PetriNetUnfolderBase]: 3459/5868 cut-off events. [2024-06-14 13:58:39,228 INFO L125 PetriNetUnfolderBase]: For 1140671/1140671 co-relation queries the response was YES. [2024-06-14 13:58:39,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55398 conditions, 5868 events. 3459/5868 cut-off events. For 1140671/1140671 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40365 event pairs, 551 based on Foata normal form. 6/5871 useless extension candidates. Maximal degree in co-relation 55195. Up to 5108 conditions per place. [2024-06-14 13:58:39,312 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 601 selfloop transitions, 37 changer transitions 0/645 dead transitions. [2024-06-14 13:58:39,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 645 transitions, 11679 flow [2024-06-14 13:58:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:58:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:58:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:58:39,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-14 13:58:39,313 INFO L175 Difference]: Start difference. First operand has 474 places, 617 transitions, 10238 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:58:39,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 645 transitions, 11679 flow [2024-06-14 13:58:45,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 645 transitions, 11266 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:58:45,046 INFO L231 Difference]: Finished difference. Result has 472 places, 617 transitions, 9903 flow [2024-06-14 13:58:45,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9825, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9903, PETRI_PLACES=472, PETRI_TRANSITIONS=617} [2024-06-14 13:58:45,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-14 13:58:45,047 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 617 transitions, 9903 flow [2024-06-14 13:58:45,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:45,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:45,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:45,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 13:58:45,048 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:45,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:45,048 INFO L85 PathProgramCache]: Analyzing trace with hash 244626548, now seen corresponding path program 3 times [2024-06-14 13:58:45,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:45,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707097327] [2024-06-14 13:58:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:45,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:45,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:45,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707097327] [2024-06-14 13:58:45,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707097327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:45,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:45,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:45,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652277536] [2024-06-14 13:58:45,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:45,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:45,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:45,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:45,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:45,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:58:45,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 617 transitions, 9903 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:58:45,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:45,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:58:45,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:46,783 INFO L124 PetriNetUnfolderBase]: 3454/5844 cut-off events. [2024-06-14 13:58:46,783 INFO L125 PetriNetUnfolderBase]: For 1095592/1095592 co-relation queries the response was YES. [2024-06-14 13:58:46,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54632 conditions, 5844 events. 3454/5844 cut-off events. For 1095592/1095592 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40098 event pairs, 632 based on Foata normal form. 2/5840 useless extension candidates. Maximal degree in co-relation 54429. Up to 5152 conditions per place. [2024-06-14 13:58:46,872 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 560 selfloop transitions, 69 changer transitions 0/636 dead transitions. [2024-06-14 13:58:46,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 636 transitions, 11207 flow [2024-06-14 13:58:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 13:58:46,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-14 13:58:46,873 INFO L175 Difference]: Start difference. First operand has 472 places, 617 transitions, 9903 flow. Second operand 8 states and 181 transitions. [2024-06-14 13:58:46,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 636 transitions, 11207 flow [2024-06-14 13:58:52,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 636 transitions, 11084 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:52,958 INFO L231 Difference]: Finished difference. Result has 475 places, 617 transitions, 9923 flow [2024-06-14 13:58:52,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9780, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9923, PETRI_PLACES=475, PETRI_TRANSITIONS=617} [2024-06-14 13:58:52,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 13:58:52,959 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 617 transitions, 9923 flow [2024-06-14 13:58:52,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:58:52,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:52,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:52,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 13:58:52,959 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:52,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2094236632, now seen corresponding path program 5 times [2024-06-14 13:58:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:52,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305082732] [2024-06-14 13:58:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:52,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:53,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:53,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305082732] [2024-06-14 13:58:53,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305082732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:53,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:53,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:53,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274482068] [2024-06-14 13:58:53,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:53,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:53,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:53,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:53,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:53,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:58:53,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 617 transitions, 9923 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:58:53,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:53,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:58:53,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:54,505 INFO L124 PetriNetUnfolderBase]: 3431/5811 cut-off events. [2024-06-14 13:58:54,505 INFO L125 PetriNetUnfolderBase]: For 1096438/1096438 co-relation queries the response was YES. [2024-06-14 13:58:54,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53230 conditions, 5811 events. 3431/5811 cut-off events. For 1096438/1096438 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 39850 event pairs, 627 based on Foata normal form. 10/5815 useless extension candidates. Maximal degree in co-relation 53026. Up to 4929 conditions per place. [2024-06-14 13:58:54,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 174 changer transitions 0/640 dead transitions. [2024-06-14 13:58:54,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 640 transitions, 11298 flow [2024-06-14 13:58:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:58:54,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 13:58:54,604 INFO L175 Difference]: Start difference. First operand has 475 places, 617 transitions, 9923 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:58:54,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 640 transitions, 11298 flow [2024-06-14 13:58:59,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 640 transitions, 11117 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:59,627 INFO L231 Difference]: Finished difference. Result has 477 places, 618 transitions, 10123 flow [2024-06-14 13:58:59,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9750, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10123, PETRI_PLACES=477, PETRI_TRANSITIONS=618} [2024-06-14 13:58:59,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-14 13:58:59,627 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 618 transitions, 10123 flow [2024-06-14 13:58:59,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:58:59,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:59,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:59,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 13:58:59,627 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:59,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:59,628 INFO L85 PathProgramCache]: Analyzing trace with hash -528715222, now seen corresponding path program 4 times [2024-06-14 13:58:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:59,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415750774] [2024-06-14 13:58:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415750774] [2024-06-14 13:58:59,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415750774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:59,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:59,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:58:59,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940331351] [2024-06-14 13:58:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:59,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:58:59,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:58:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:58:59,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:58:59,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 618 transitions, 10123 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:59,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:59,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:58:59,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:01,156 INFO L124 PetriNetUnfolderBase]: 3465/5858 cut-off events. [2024-06-14 13:59:01,156 INFO L125 PetriNetUnfolderBase]: For 1083174/1083174 co-relation queries the response was YES. [2024-06-14 13:59:01,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54420 conditions, 5858 events. 3465/5858 cut-off events. For 1083174/1083174 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40213 event pairs, 618 based on Foata normal form. 2/5852 useless extension candidates. Maximal degree in co-relation 54215. Up to 5127 conditions per place. [2024-06-14 13:59:01,253 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 566 selfloop transitions, 74 changer transitions 0/647 dead transitions. [2024-06-14 13:59:01,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 647 transitions, 11839 flow [2024-06-14 13:59:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:59:01,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-14 13:59:01,254 INFO L175 Difference]: Start difference. First operand has 477 places, 618 transitions, 10123 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:59:01,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 647 transitions, 11839 flow [2024-06-14 13:59:06,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 647 transitions, 11483 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:06,997 INFO L231 Difference]: Finished difference. Result has 479 places, 624 transitions, 10071 flow [2024-06-14 13:59:06,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9767, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10071, PETRI_PLACES=479, PETRI_TRANSITIONS=624} [2024-06-14 13:59:06,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-14 13:59:06,997 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 624 transitions, 10071 flow [2024-06-14 13:59:06,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:06,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:06,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:06,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 13:59:06,998 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:06,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:06,998 INFO L85 PathProgramCache]: Analyzing trace with hash -525858262, now seen corresponding path program 5 times [2024-06-14 13:59:06,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:06,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930997979] [2024-06-14 13:59:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:06,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:07,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:07,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930997979] [2024-06-14 13:59:07,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930997979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:07,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:07,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:59:07,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178159467] [2024-06-14 13:59:07,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:07,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:59:07,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:59:07,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:59:07,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:59:07,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 624 transitions, 10071 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:07,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:07,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:59:07,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:08,565 INFO L124 PetriNetUnfolderBase]: 3473/5877 cut-off events. [2024-06-14 13:59:08,566 INFO L125 PetriNetUnfolderBase]: For 1099756/1099756 co-relation queries the response was YES. [2024-06-14 13:59:08,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54547 conditions, 5877 events. 3473/5877 cut-off events. For 1099756/1099756 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 40358 event pairs, 627 based on Foata normal form. 2/5873 useless extension candidates. Maximal degree in co-relation 54340. Up to 5181 conditions per place. [2024-06-14 13:59:08,662 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 568 selfloop transitions, 69 changer transitions 0/644 dead transitions. [2024-06-14 13:59:08,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 644 transitions, 11439 flow [2024-06-14 13:59:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:59:08,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 13:59:08,663 INFO L175 Difference]: Start difference. First operand has 479 places, 624 transitions, 10071 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:59:08,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 644 transitions, 11439 flow [2024-06-14 13:59:14,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 644 transitions, 11255 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 13:59:14,683 INFO L231 Difference]: Finished difference. Result has 483 places, 626 transitions, 10084 flow [2024-06-14 13:59:14,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9909, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10084, PETRI_PLACES=483, PETRI_TRANSITIONS=626} [2024-06-14 13:59:14,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-14 13:59:14,683 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 626 transitions, 10084 flow [2024-06-14 13:59:14,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:14,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:14,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:14,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 13:59:14,684 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:14,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:14,684 INFO L85 PathProgramCache]: Analyzing trace with hash 45109836, now seen corresponding path program 6 times [2024-06-14 13:59:14,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:14,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304879271] [2024-06-14 13:59:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:14,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:14,918 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 13:59:14,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:14,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304879271] [2024-06-14 13:59:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304879271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:14,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:14,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:59:14,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309033498] [2024-06-14 13:59:14,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:14,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:59:14,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:59:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:59:14,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:59:14,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 626 transitions, 10084 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:14,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:14,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:59:14,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:16,280 INFO L124 PetriNetUnfolderBase]: 3481/5905 cut-off events. [2024-06-14 13:59:16,281 INFO L125 PetriNetUnfolderBase]: For 1115328/1115328 co-relation queries the response was YES. [2024-06-14 13:59:16,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54748 conditions, 5905 events. 3481/5905 cut-off events. For 1115328/1115328 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 40595 event pairs, 516 based on Foata normal form. 2/5901 useless extension candidates. Maximal degree in co-relation 54539. Up to 4980 conditions per place. [2024-06-14 13:59:16,380 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 557 selfloop transitions, 92 changer transitions 0/656 dead transitions. [2024-06-14 13:59:16,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 656 transitions, 12072 flow [2024-06-14 13:59:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:59:16,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:59:16,381 INFO L175 Difference]: Start difference. First operand has 483 places, 626 transitions, 10084 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:59:16,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 656 transitions, 12072 flow [2024-06-14 13:59:20,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 656 transitions, 11907 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:20,955 INFO L231 Difference]: Finished difference. Result has 485 places, 631 transitions, 10251 flow [2024-06-14 13:59:20,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9919, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10251, PETRI_PLACES=485, PETRI_TRANSITIONS=631} [2024-06-14 13:59:20,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-14 13:59:20,956 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 631 transitions, 10251 flow [2024-06-14 13:59:20,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:20,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:20,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:20,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 13:59:20,956 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:20,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1333813914, now seen corresponding path program 7 times [2024-06-14 13:59:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:20,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430455836] [2024-06-14 13:59:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:20,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:21,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:21,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430455836] [2024-06-14 13:59:21,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430455836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:21,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:21,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:21,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680415739] [2024-06-14 13:59:21,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:21,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:21,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:59:21,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:59:21,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 631 transitions, 10251 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:59:21,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:21,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:59:21,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:22,620 INFO L124 PetriNetUnfolderBase]: 3489/5916 cut-off events. [2024-06-14 13:59:22,620 INFO L125 PetriNetUnfolderBase]: For 1133902/1133902 co-relation queries the response was YES. [2024-06-14 13:59:22,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55273 conditions, 5916 events. 3489/5916 cut-off events. For 1133902/1133902 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40792 event pairs, 530 based on Foata normal form. 2/5912 useless extension candidates. Maximal degree in co-relation 55063. Up to 5097 conditions per place. [2024-06-14 13:59:22,721 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 557 selfloop transitions, 93 changer transitions 0/657 dead transitions. [2024-06-14 13:59:22,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 657 transitions, 11663 flow [2024-06-14 13:59:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:59:22,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 13:59:22,722 INFO L175 Difference]: Start difference. First operand has 485 places, 631 transitions, 10251 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:59:22,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 657 transitions, 11663 flow [2024-06-14 13:59:29,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 657 transitions, 11386 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-14 13:59:29,129 INFO L231 Difference]: Finished difference. Result has 489 places, 633 transitions, 10223 flow [2024-06-14 13:59:29,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10000, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10223, PETRI_PLACES=489, PETRI_TRANSITIONS=633} [2024-06-14 13:59:29,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-14 13:59:29,129 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 633 transitions, 10223 flow [2024-06-14 13:59:29,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:59:29,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:29,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 13:59:29,130 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:29,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash 825621488, now seen corresponding path program 8 times [2024-06-14 13:59:29,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:29,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98914897] [2024-06-14 13:59:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:29,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:29,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:29,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98914897] [2024-06-14 13:59:29,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98914897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:29,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:29,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:29,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497554949] [2024-06-14 13:59:29,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:29,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:29,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:29,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:29,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:59:29,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:59:29,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 633 transitions, 10223 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:59:29,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:29,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:59:29,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:30,941 INFO L124 PetriNetUnfolderBase]: 3484/5902 cut-off events. [2024-06-14 13:59:30,941 INFO L125 PetriNetUnfolderBase]: For 1132410/1132410 co-relation queries the response was YES. [2024-06-14 13:59:31,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54857 conditions, 5902 events. 3484/5902 cut-off events. For 1132410/1132410 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40641 event pairs, 630 based on Foata normal form. 2/5898 useless extension candidates. Maximal degree in co-relation 54646. Up to 5198 conditions per place. [2024-06-14 13:59:31,032 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 572 selfloop transitions, 73 changer transitions 0/652 dead transitions. [2024-06-14 13:59:31,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 652 transitions, 11559 flow [2024-06-14 13:59:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 13:59:31,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-14 13:59:31,033 INFO L175 Difference]: Start difference. First operand has 489 places, 633 transitions, 10223 flow. Second operand 8 states and 181 transitions. [2024-06-14 13:59:31,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 652 transitions, 11559 flow [2024-06-14 13:59:36,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 652 transitions, 11358 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:36,892 INFO L231 Difference]: Finished difference. Result has 491 places, 633 transitions, 10173 flow [2024-06-14 13:59:36,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10022, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10173, PETRI_PLACES=491, PETRI_TRANSITIONS=633} [2024-06-14 13:59:36,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-14 13:59:36,893 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 633 transitions, 10173 flow [2024-06-14 13:59:36,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:59:36,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:36,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:36,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 13:59:36,893 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:36,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash 835144688, now seen corresponding path program 9 times [2024-06-14 13:59:36,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:36,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80458659] [2024-06-14 13:59:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:36,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80458659] [2024-06-14 13:59:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80458659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:37,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:37,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:37,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679125970] [2024-06-14 13:59:37,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:37,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:37,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:37,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:59:37,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:59:37,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 633 transitions, 10173 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:59:37,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:37,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:59:37,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:38,655 INFO L124 PetriNetUnfolderBase]: 3479/5891 cut-off events. [2024-06-14 13:59:38,656 INFO L125 PetriNetUnfolderBase]: For 1131938/1131938 co-relation queries the response was YES. [2024-06-14 13:59:38,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54544 conditions, 5891 events. 3479/5891 cut-off events. For 1131938/1131938 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40527 event pairs, 623 based on Foata normal form. 2/5883 useless extension candidates. Maximal degree in co-relation 54332. Up to 5171 conditions per place. [2024-06-14 13:59:38,745 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 569 selfloop transitions, 78 changer transitions 0/654 dead transitions. [2024-06-14 13:59:38,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 654 transitions, 11517 flow [2024-06-14 13:59:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:59:38,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-06-14 13:59:38,746 INFO L175 Difference]: Start difference. First operand has 491 places, 633 transitions, 10173 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:59:38,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 654 transitions, 11517 flow [2024-06-14 13:59:44,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 654 transitions, 11352 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:44,276 INFO L231 Difference]: Finished difference. Result has 494 places, 633 transitions, 10169 flow [2024-06-14 13:59:44,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10008, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10169, PETRI_PLACES=494, PETRI_TRANSITIONS=633} [2024-06-14 13:59:44,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-14 13:59:44,277 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 633 transitions, 10169 flow [2024-06-14 13:59:44,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 13:59:44,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:44,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:44,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 13:59:44,277 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:44,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash -48713838, now seen corresponding path program 10 times [2024-06-14 13:59:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:44,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529972572] [2024-06-14 13:59:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:44,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:44,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529972572] [2024-06-14 13:59:44,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529972572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:44,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:44,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:59:44,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510060789] [2024-06-14 13:59:44,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:44,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:59:44,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:59:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:59:44,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:59:44,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 633 transitions, 10169 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:44,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:44,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:59:44,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:46,075 INFO L124 PetriNetUnfolderBase]: 3523/5986 cut-off events. [2024-06-14 13:59:46,075 INFO L125 PetriNetUnfolderBase]: For 1232054/1232054 co-relation queries the response was YES. [2024-06-14 13:59:46,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55356 conditions, 5986 events. 3523/5986 cut-off events. For 1232054/1232054 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 41423 event pairs, 637 based on Foata normal form. 12/5995 useless extension candidates. Maximal degree in co-relation 55143. Up to 5315 conditions per place. [2024-06-14 13:59:46,168 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 605 selfloop transitions, 44 changer transitions 0/656 dead transitions. [2024-06-14 13:59:46,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 656 transitions, 11639 flow [2024-06-14 13:59:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:59:46,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-14 13:59:46,169 INFO L175 Difference]: Start difference. First operand has 494 places, 633 transitions, 10169 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:59:46,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 656 transitions, 11639 flow [2024-06-14 13:59:51,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 656 transitions, 11464 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:51,862 INFO L231 Difference]: Finished difference. Result has 495 places, 637 transitions, 10195 flow [2024-06-14 13:59:51,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9994, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10195, PETRI_PLACES=495, PETRI_TRANSITIONS=637} [2024-06-14 13:59:51,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-14 13:59:51,863 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 637 transitions, 10195 flow [2024-06-14 13:59:51,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:51,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:51,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:51,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 13:59:51,863 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 13:59:51,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:51,863 INFO L85 PathProgramCache]: Analyzing trace with hash -39190638, now seen corresponding path program 11 times [2024-06-14 13:59:51,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:51,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128413092] [2024-06-14 13:59:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:52,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:52,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128413092] [2024-06-14 13:59:52,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128413092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:52,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:52,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:59:52,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001313414] [2024-06-14 13:59:52,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:52,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:59:52,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:52,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:59:52,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:59:52,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 13:59:52,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 637 transitions, 10195 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:52,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:52,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 13:59:52,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:53,596 INFO L124 PetriNetUnfolderBase]: 3501/5964 cut-off events. [2024-06-14 13:59:53,596 INFO L125 PetriNetUnfolderBase]: For 1162244/1162244 co-relation queries the response was YES. [2024-06-14 13:59:53,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53793 conditions, 5964 events. 3501/5964 cut-off events. For 1162244/1162244 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 41372 event pairs, 615 based on Foata normal form. 12/5969 useless extension candidates. Maximal degree in co-relation 53579. Up to 5075 conditions per place. [2024-06-14 13:59:53,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 604 selfloop transitions, 51 changer transitions 0/662 dead transitions. [2024-06-14 13:59:53,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 662 transitions, 11653 flow [2024-06-14 13:59:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:59:53,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-14 13:59:53,687 INFO L175 Difference]: Start difference. First operand has 495 places, 637 transitions, 10195 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:59:53,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 662 transitions, 11653 flow [2024-06-14 13:59:59,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 662 transitions, 11534 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:59,729 INFO L231 Difference]: Finished difference. Result has 498 places, 639 transitions, 10224 flow [2024-06-14 13:59:59,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10076, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10224, PETRI_PLACES=498, PETRI_TRANSITIONS=639} [2024-06-14 13:59:59,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-14 13:59:59,729 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 639 transitions, 10224 flow [2024-06-14 13:59:59,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:59,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:59,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:59,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 13:59:59,730 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 13:59:59,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:59,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1650889768, now seen corresponding path program 6 times [2024-06-14 13:59:59,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:59,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561732775] [2024-06-14 13:59:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:59,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:59,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:59,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561732775] [2024-06-14 13:59:59,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561732775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:59,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:59,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:59,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234037253] [2024-06-14 13:59:59,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:59,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:59,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:59,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:00,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:00:00,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 639 transitions, 10224 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:00,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:00,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:00:00,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:01,549 INFO L124 PetriNetUnfolderBase]: 3537/6024 cut-off events. [2024-06-14 14:00:01,550 INFO L125 PetriNetUnfolderBase]: For 1166159/1166159 co-relation queries the response was YES. [2024-06-14 14:00:01,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54350 conditions, 6024 events. 3537/6024 cut-off events. For 1166159/1166159 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 41818 event pairs, 643 based on Foata normal form. 10/6031 useless extension candidates. Maximal degree in co-relation 54135. Up to 5325 conditions per place. [2024-06-14 14:00:01,647 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 599 selfloop transitions, 55 changer transitions 0/661 dead transitions. [2024-06-14 14:00:01,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 661 transitions, 11676 flow [2024-06-14 14:00:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 14:00:01,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 14:00:01,648 INFO L175 Difference]: Start difference. First operand has 498 places, 639 transitions, 10224 flow. Second operand 9 states and 201 transitions. [2024-06-14 14:00:01,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 661 transitions, 11676 flow [2024-06-14 14:00:08,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 661 transitions, 11560 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:08,272 INFO L231 Difference]: Finished difference. Result has 501 places, 641 transitions, 10294 flow [2024-06-14 14:00:08,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10108, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10294, PETRI_PLACES=501, PETRI_TRANSITIONS=641} [2024-06-14 14:00:08,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-14 14:00:08,272 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 641 transitions, 10294 flow [2024-06-14 14:00:08,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:08,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:08,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:08,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:00:08,273 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:08,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:08,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2006107276, now seen corresponding path program 12 times [2024-06-14 14:00:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:08,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850520666] [2024-06-14 14:00:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:08,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:08,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:08,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850520666] [2024-06-14 14:00:08,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850520666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:08,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:08,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:00:08,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935688736] [2024-06-14 14:00:08,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:08,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:00:08,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:08,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:00:08,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:00:08,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:00:08,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 641 transitions, 10294 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:08,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:08,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:00:08,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:10,098 INFO L124 PetriNetUnfolderBase]: 3604/6144 cut-off events. [2024-06-14 14:00:10,098 INFO L125 PetriNetUnfolderBase]: For 1270506/1270506 co-relation queries the response was YES. [2024-06-14 14:00:10,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55210 conditions, 6144 events. 3604/6144 cut-off events. For 1270506/1270506 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 42961 event pairs, 655 based on Foata normal form. 22/6163 useless extension candidates. Maximal degree in co-relation 54994. Up to 5225 conditions per place. [2024-06-14 14:00:10,200 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 574 selfloop transitions, 98 changer transitions 0/679 dead transitions. [2024-06-14 14:00:10,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 679 transitions, 11873 flow [2024-06-14 14:00:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 14:00:10,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-14 14:00:10,203 INFO L175 Difference]: Start difference. First operand has 501 places, 641 transitions, 10294 flow. Second operand 8 states and 203 transitions. [2024-06-14 14:00:10,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 679 transitions, 11873 flow [2024-06-14 14:00:16,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 679 transitions, 11711 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:16,349 INFO L231 Difference]: Finished difference. Result has 502 places, 645 transitions, 10478 flow [2024-06-14 14:00:16,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10132, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10478, PETRI_PLACES=502, PETRI_TRANSITIONS=645} [2024-06-14 14:00:16,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-14 14:00:16,350 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 645 transitions, 10478 flow [2024-06-14 14:00:16,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:16,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:16,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:16,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:00:16,350 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:16,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:16,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2006433706, now seen corresponding path program 13 times [2024-06-14 14:00:16,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:16,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675155287] [2024-06-14 14:00:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:16,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:16,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:16,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675155287] [2024-06-14 14:00:16,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675155287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:16,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:16,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:00:16,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536564903] [2024-06-14 14:00:16,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:16,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:00:16,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:16,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:00:16,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:00:16,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:00:16,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 645 transitions, 10478 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:16,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:16,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:00:16,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:18,094 INFO L124 PetriNetUnfolderBase]: 3559/6098 cut-off events. [2024-06-14 14:00:18,095 INFO L125 PetriNetUnfolderBase]: For 1107409/1107409 co-relation queries the response was YES. [2024-06-14 14:00:18,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52236 conditions, 6098 events. 3559/6098 cut-off events. For 1107409/1107409 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 42677 event pairs, 490 based on Foata normal form. 22/6117 useless extension candidates. Maximal degree in co-relation 52019. Up to 4479 conditions per place. [2024-06-14 14:00:18,194 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 560 selfloop transitions, 119 changer transitions 0/686 dead transitions. [2024-06-14 14:00:18,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 686 transitions, 12324 flow [2024-06-14 14:00:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 14:00:18,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-14 14:00:18,195 INFO L175 Difference]: Start difference. First operand has 502 places, 645 transitions, 10478 flow. Second operand 8 states and 207 transitions. [2024-06-14 14:00:18,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 686 transitions, 12324 flow [2024-06-14 14:00:23,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 686 transitions, 12075 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:23,767 INFO L231 Difference]: Finished difference. Result has 504 places, 647 transitions, 10558 flow [2024-06-14 14:00:23,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10231, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10558, PETRI_PLACES=504, PETRI_TRANSITIONS=647} [2024-06-14 14:00:23,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-14 14:00:23,767 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 647 transitions, 10558 flow [2024-06-14 14:00:23,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:23,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:23,767 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] [2024-06-14 14:00:23,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:00:23,768 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:23,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash 715134470, now seen corresponding path program 7 times [2024-06-14 14:00:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885042599] [2024-06-14 14:00:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:23,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:24,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:24,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885042599] [2024-06-14 14:00:24,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885042599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:24,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:24,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:00:24,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931493095] [2024-06-14 14:00:24,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:24,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:00:24,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:00:24,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:24,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:00:24,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 647 transitions, 10558 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:24,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:24,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:00:24,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:25,521 INFO L124 PetriNetUnfolderBase]: 3567/6101 cut-off events. [2024-06-14 14:00:25,521 INFO L125 PetriNetUnfolderBase]: For 935633/935636 co-relation queries the response was YES. [2024-06-14 14:00:25,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52467 conditions, 6101 events. 3567/6101 cut-off events. For 935633/935636 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 42744 event pairs, 656 based on Foata normal form. 4/6101 useless extension candidates. Maximal degree in co-relation 52249. Up to 5257 conditions per place. [2024-06-14 14:00:25,618 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 541 selfloop transitions, 126 changer transitions 0/674 dead transitions. [2024-06-14 14:00:25,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 674 transitions, 12024 flow [2024-06-14 14:00:25,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:25,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:00:25,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 14:00:25,619 INFO L175 Difference]: Start difference. First operand has 504 places, 647 transitions, 10558 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:00:25,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 674 transitions, 12024 flow [2024-06-14 14:00:31,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 674 transitions, 11833 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 14:00:31,890 INFO L231 Difference]: Finished difference. Result has 508 places, 649 transitions, 10698 flow [2024-06-14 14:00:31,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10367, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10698, PETRI_PLACES=508, PETRI_TRANSITIONS=649} [2024-06-14 14:00:31,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-14 14:00:31,891 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 649 transitions, 10698 flow [2024-06-14 14:00:31,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:31,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:31,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:31,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:00:31,891 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:31,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash 951309830, now seen corresponding path program 8 times [2024-06-14 14:00:31,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742707723] [2024-06-14 14:00:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:31,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:32,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742707723] [2024-06-14 14:00:32,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742707723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:32,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:32,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:00:32,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794718746] [2024-06-14 14:00:32,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:32,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:00:32,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:32,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:00:32,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:32,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:00:32,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 649 transitions, 10698 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:32,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:32,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:00:32,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:33,616 INFO L124 PetriNetUnfolderBase]: 3575/6113 cut-off events. [2024-06-14 14:00:33,616 INFO L125 PetriNetUnfolderBase]: For 933838/933841 co-relation queries the response was YES. [2024-06-14 14:00:33,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52321 conditions, 6113 events. 3575/6113 cut-off events. For 933838/933841 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 42824 event pairs, 658 based on Foata normal form. 4/6113 useless extension candidates. Maximal degree in co-relation 52102. Up to 5269 conditions per place. [2024-06-14 14:00:33,716 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 540 selfloop transitions, 126 changer transitions 0/673 dead transitions. [2024-06-14 14:00:33,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 673 transitions, 12158 flow [2024-06-14 14:00:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 14:00:33,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 14:00:33,716 INFO L175 Difference]: Start difference. First operand has 508 places, 649 transitions, 10698 flow. Second operand 8 states and 188 transitions. [2024-06-14 14:00:33,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 673 transitions, 12158 flow [2024-06-14 14:00:39,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 673 transitions, 11843 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:39,099 INFO L231 Difference]: Finished difference. Result has 510 places, 651 transitions, 10718 flow [2024-06-14 14:00:39,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10383, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10718, PETRI_PLACES=510, PETRI_TRANSITIONS=651} [2024-06-14 14:00:39,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-14 14:00:39,100 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 651 transitions, 10718 flow [2024-06-14 14:00:39,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:39,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:39,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:39,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:00:39,100 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:39,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash 951606500, now seen corresponding path program 9 times [2024-06-14 14:00:39,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:39,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137628415] [2024-06-14 14:00:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:39,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:39,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:39,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137628415] [2024-06-14 14:00:39,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137628415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:39,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:39,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:00:39,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009957051] [2024-06-14 14:00:39,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:39,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:00:39,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:00:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:39,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:00:39,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 651 transitions, 10718 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:39,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:39,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:00:39,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:40,915 INFO L124 PetriNetUnfolderBase]: 3629/6195 cut-off events. [2024-06-14 14:00:40,915 INFO L125 PetriNetUnfolderBase]: For 1023771/1023774 co-relation queries the response was YES. [2024-06-14 14:00:40,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54261 conditions, 6195 events. 3629/6195 cut-off events. For 1023771/1023774 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43395 event pairs, 668 based on Foata normal form. 4/6195 useless extension candidates. Maximal degree in co-relation 54041. Up to 5234 conditions per place. [2024-06-14 14:00:41,022 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 542 selfloop transitions, 134 changer transitions 0/683 dead transitions. [2024-06-14 14:00:41,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 683 transitions, 12604 flow [2024-06-14 14:00:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 14:00:41,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 14:00:41,023 INFO L175 Difference]: Start difference. First operand has 510 places, 651 transitions, 10718 flow. Second operand 8 states and 193 transitions. [2024-06-14 14:00:41,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 683 transitions, 12604 flow [2024-06-14 14:00:47,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 683 transitions, 12285 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:47,147 INFO L231 Difference]: Finished difference. Result has 513 places, 656 transitions, 10862 flow [2024-06-14 14:00:47,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10399, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10862, PETRI_PLACES=513, PETRI_TRANSITIONS=656} [2024-06-14 14:00:47,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-14 14:00:47,147 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 656 transitions, 10862 flow [2024-06-14 14:00:47,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:47,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:47,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:47,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:00:47,148 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:47,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash 27075074, now seen corresponding path program 10 times [2024-06-14 14:00:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:47,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559187609] [2024-06-14 14:00:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:47,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:47,395 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 14:00:47,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:47,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559187609] [2024-06-14 14:00:47,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559187609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:47,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:47,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:00:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124994217] [2024-06-14 14:00:47,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:47,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:00:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:00:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:47,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:00:47,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 656 transitions, 10862 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:47,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:47,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:00:47,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:48,903 INFO L124 PetriNetUnfolderBase]: 3617/6173 cut-off events. [2024-06-14 14:00:48,903 INFO L125 PetriNetUnfolderBase]: For 1019971/1019974 co-relation queries the response was YES. [2024-06-14 14:00:48,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54033 conditions, 6173 events. 3617/6173 cut-off events. For 1019971/1019974 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43220 event pairs, 666 based on Foata normal form. 4/6173 useless extension candidates. Maximal degree in co-relation 53811. Up to 5382 conditions per place. [2024-06-14 14:00:49,006 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 585 selfloop transitions, 88 changer transitions 0/680 dead transitions. [2024-06-14 14:00:49,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 680 transitions, 12268 flow [2024-06-14 14:00:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:00:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:00:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:00:49,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 14:00:49,008 INFO L175 Difference]: Start difference. First operand has 513 places, 656 transitions, 10862 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:00:49,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 680 transitions, 12268 flow [2024-06-14 14:00:54,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 680 transitions, 11997 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 14:00:54,762 INFO L231 Difference]: Finished difference. Result has 516 places, 656 transitions, 10772 flow [2024-06-14 14:00:54,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10591, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10772, PETRI_PLACES=516, PETRI_TRANSITIONS=656} [2024-06-14 14:00:54,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 473 predicate places. [2024-06-14 14:00:54,763 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 656 transitions, 10772 flow [2024-06-14 14:00:54,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:54,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:54,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:54,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:00:54,763 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:54,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:54,763 INFO L85 PathProgramCache]: Analyzing trace with hash 35645954, now seen corresponding path program 11 times [2024-06-14 14:00:54,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:54,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976572100] [2024-06-14 14:00:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:54,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:55,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:55,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976572100] [2024-06-14 14:00:55,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976572100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:55,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:55,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:00:55,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191982503] [2024-06-14 14:00:55,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:55,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:00:55,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:55,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:00:55,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:55,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:00:55,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 656 transitions, 10772 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:00:55,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:55,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:00:55,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:56,587 INFO L124 PetriNetUnfolderBase]: 3625/6170 cut-off events. [2024-06-14 14:00:56,587 INFO L125 PetriNetUnfolderBase]: For 1029825/1029828 co-relation queries the response was YES. [2024-06-14 14:00:56,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54028 conditions, 6170 events. 3625/6170 cut-off events. For 1029825/1029828 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 43139 event pairs, 649 based on Foata normal form. 4/6170 useless extension candidates. Maximal degree in co-relation 53804. Up to 5236 conditions per place. [2024-06-14 14:00:56,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 579 selfloop transitions, 101 changer transitions 0/687 dead transitions. [2024-06-14 14:00:56,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 687 transitions, 12300 flow [2024-06-14 14:00:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:00:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:00:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:00:56,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-14 14:00:56,692 INFO L175 Difference]: Start difference. First operand has 516 places, 656 transitions, 10772 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:00:56,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 687 transitions, 12300 flow [2024-06-14 14:01:03,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 687 transitions, 11970 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:03,159 INFO L231 Difference]: Finished difference. Result has 517 places, 659 transitions, 10750 flow [2024-06-14 14:01:03,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10442, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10750, PETRI_PLACES=517, PETRI_TRANSITIONS=659} [2024-06-14 14:01:03,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-14 14:01:03,160 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 659 transitions, 10750 flow [2024-06-14 14:01:03,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:01:03,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:03,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:03,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:01:03,160 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 14:01:03,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:03,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1304665562, now seen corresponding path program 12 times [2024-06-14 14:01:03,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:03,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867540989] [2024-06-14 14:01:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:03,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867540989] [2024-06-14 14:01:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867540989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:03,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:03,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:03,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846570634] [2024-06-14 14:01:03,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:03,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:03,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:03,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 659 transitions, 10750 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:01:03,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:03,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:03,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:04,978 INFO L124 PetriNetUnfolderBase]: 3633/6211 cut-off events. [2024-06-14 14:01:04,978 INFO L125 PetriNetUnfolderBase]: For 1041707/1041710 co-relation queries the response was YES. [2024-06-14 14:01:05,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54268 conditions, 6211 events. 3633/6211 cut-off events. For 1041707/1041710 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 43610 event pairs, 473 based on Foata normal form. 4/6211 useless extension candidates. Maximal degree in co-relation 54042. Up to 4436 conditions per place. [2024-06-14 14:01:05,085 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 562 selfloop transitions, 125 changer transitions 0/694 dead transitions. [2024-06-14 14:01:05,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 694 transitions, 12589 flow [2024-06-14 14:01:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:01:05,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-14 14:01:05,093 INFO L175 Difference]: Start difference. First operand has 517 places, 659 transitions, 10750 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:01:05,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 694 transitions, 12589 flow [2024-06-14 14:01:12,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 694 transitions, 12375 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:12,453 INFO L231 Difference]: Finished difference. Result has 520 places, 661 transitions, 10838 flow [2024-06-14 14:01:12,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10536, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10838, PETRI_PLACES=520, PETRI_TRANSITIONS=661} [2024-06-14 14:01:12,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-06-14 14:01:12,453 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 661 transitions, 10838 flow [2024-06-14 14:01:12,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:01:12,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:12,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:12,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:01:12,454 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 14:01:12,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1800282626, now seen corresponding path program 13 times [2024-06-14 14:01:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:12,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378665313] [2024-06-14 14:01:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:12,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:12,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378665313] [2024-06-14 14:01:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378665313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:12,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:12,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368742599] [2024-06-14 14:01:12,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:12,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:12,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:12,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:12,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:12,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:12,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 661 transitions, 10838 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:01:12,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:12,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:12,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:14,216 INFO L124 PetriNetUnfolderBase]: 3608/6157 cut-off events. [2024-06-14 14:01:14,216 INFO L125 PetriNetUnfolderBase]: For 1039404/1039407 co-relation queries the response was YES. [2024-06-14 14:01:14,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53304 conditions, 6157 events. 3608/6157 cut-off events. For 1039404/1039407 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 43151 event pairs, 519 based on Foata normal form. 10/6163 useless extension candidates. Maximal degree in co-relation 53077. Up to 4422 conditions per place. [2024-06-14 14:01:14,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 573 selfloop transitions, 111 changer transitions 0/691 dead transitions. [2024-06-14 14:01:14,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 691 transitions, 12340 flow [2024-06-14 14:01:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:01:14,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-14 14:01:14,324 INFO L175 Difference]: Start difference. First operand has 520 places, 661 transitions, 10838 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:01:14,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 691 transitions, 12340 flow [2024-06-14 14:01:20,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 691 transitions, 12022 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:20,796 INFO L231 Difference]: Finished difference. Result has 522 places, 661 transitions, 10748 flow [2024-06-14 14:01:20,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10520, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10748, PETRI_PLACES=522, PETRI_TRANSITIONS=661} [2024-06-14 14:01:20,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 479 predicate places. [2024-06-14 14:01:20,796 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 661 transitions, 10748 flow [2024-06-14 14:01:20,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:01:20,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:20,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:20,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:01:20,797 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 14:01:20,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1740594694, now seen corresponding path program 14 times [2024-06-14 14:01:20,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:20,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929283519] [2024-06-14 14:01:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:20,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:21,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:21,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929283519] [2024-06-14 14:01:21,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929283519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:21,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:21,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:21,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062210348] [2024-06-14 14:01:21,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:21,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:21,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:21,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:21,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:21,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:21,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 661 transitions, 10748 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:01:21,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:21,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:21,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:22,577 INFO L124 PetriNetUnfolderBase]: 3585/6126 cut-off events. [2024-06-14 14:01:22,577 INFO L125 PetriNetUnfolderBase]: For 972763/972763 co-relation queries the response was YES. [2024-06-14 14:01:22,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51432 conditions, 6126 events. 3585/6126 cut-off events. For 972763/972763 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 42941 event pairs, 641 based on Foata normal form. 10/6133 useless extension candidates. Maximal degree in co-relation 51205. Up to 5213 conditions per place. [2024-06-14 14:01:22,685 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 560 selfloop transitions, 127 changer transitions 0/694 dead transitions. [2024-06-14 14:01:22,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 694 transitions, 12261 flow [2024-06-14 14:01:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 14:01:22,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 14:01:22,685 INFO L175 Difference]: Start difference. First operand has 522 places, 661 transitions, 10748 flow. Second operand 9 states and 217 transitions. [2024-06-14 14:01:22,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 694 transitions, 12261 flow [2024-06-14 14:01:28,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 694 transitions, 11992 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:28,149 INFO L231 Difference]: Finished difference. Result has 525 places, 662 transitions, 10774 flow [2024-06-14 14:01:28,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10491, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10774, PETRI_PLACES=525, PETRI_TRANSITIONS=662} [2024-06-14 14:01:28,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-14 14:01:28,149 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 662 transitions, 10774 flow [2024-06-14 14:01:28,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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 14:01:28,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:28,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:28,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 14:01:28,149 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:28,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:28,150 INFO L85 PathProgramCache]: Analyzing trace with hash 780347786, now seen corresponding path program 1 times [2024-06-14 14:01:28,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:28,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092041932] [2024-06-14 14:01:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:28,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:28,436 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 14:01:28,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:28,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092041932] [2024-06-14 14:01:28,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092041932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:28,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:28,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:28,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573504865] [2024-06-14 14:01:28,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:28,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:28,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:28,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:28,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:28,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:28,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 662 transitions, 10774 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:28,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:28,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:28,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:29,975 INFO L124 PetriNetUnfolderBase]: 3619/6176 cut-off events. [2024-06-14 14:01:29,975 INFO L125 PetriNetUnfolderBase]: For 944536/944536 co-relation queries the response was YES. [2024-06-14 14:01:30,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52307 conditions, 6176 events. 3619/6176 cut-off events. For 944536/944536 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 43347 event pairs, 543 based on Foata normal form. 2/6175 useless extension candidates. Maximal degree in co-relation 52079. Up to 5343 conditions per place. [2024-06-14 14:01:30,089 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 636 selfloop transitions, 57 changer transitions 0/700 dead transitions. [2024-06-14 14:01:30,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 700 transitions, 12988 flow [2024-06-14 14:01:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 14:01:30,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:01:30,090 INFO L175 Difference]: Start difference. First operand has 525 places, 662 transitions, 10774 flow. Second operand 8 states and 192 transitions. [2024-06-14 14:01:30,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 700 transitions, 12988 flow [2024-06-14 14:01:36,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 700 transitions, 12734 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:36,519 INFO L231 Difference]: Finished difference. Result has 526 places, 668 transitions, 10829 flow [2024-06-14 14:01:36,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10520, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10829, PETRI_PLACES=526, PETRI_TRANSITIONS=668} [2024-06-14 14:01:36,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-14 14:01:36,520 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 668 transitions, 10829 flow [2024-06-14 14:01:36,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:36,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:36,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:36,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 14:01:36,520 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:36,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:36,520 INFO L85 PathProgramCache]: Analyzing trace with hash 405856820, now seen corresponding path program 2 times [2024-06-14 14:01:36,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:36,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229745169] [2024-06-14 14:01:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:36,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:36,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:36,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229745169] [2024-06-14 14:01:36,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229745169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:36,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:36,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:36,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134836551] [2024-06-14 14:01:36,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:36,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:36,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:36,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:36,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:36,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:36,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 668 transitions, 10829 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:36,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:36,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:36,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:38,381 INFO L124 PetriNetUnfolderBase]: 3640/6207 cut-off events. [2024-06-14 14:01:38,381 INFO L125 PetriNetUnfolderBase]: For 978608/978608 co-relation queries the response was YES. [2024-06-14 14:01:38,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52882 conditions, 6207 events. 3640/6207 cut-off events. For 978608/978608 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 43529 event pairs, 547 based on Foata normal form. 2/6206 useless extension candidates. Maximal degree in co-relation 52653. Up to 5363 conditions per place. [2024-06-14 14:01:38,492 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 634 selfloop transitions, 60 changer transitions 0/701 dead transitions. [2024-06-14 14:01:38,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 701 transitions, 12987 flow [2024-06-14 14:01:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:01:38,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:01:38,493 INFO L175 Difference]: Start difference. First operand has 526 places, 668 transitions, 10829 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:01:38,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 701 transitions, 12987 flow [2024-06-14 14:01:44,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 701 transitions, 12762 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:44,425 INFO L231 Difference]: Finished difference. Result has 531 places, 672 transitions, 10861 flow [2024-06-14 14:01:44,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10662, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10861, PETRI_PLACES=531, PETRI_TRANSITIONS=672} [2024-06-14 14:01:44,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 488 predicate places. [2024-06-14 14:01:44,425 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 672 transitions, 10861 flow [2024-06-14 14:01:44,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:44,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:44,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:44,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 14:01:44,426 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:44,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:44,426 INFO L85 PathProgramCache]: Analyzing trace with hash -769080950, now seen corresponding path program 3 times [2024-06-14 14:01:44,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:44,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366758921] [2024-06-14 14:01:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:44,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:44,712 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 14:01:44,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:44,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366758921] [2024-06-14 14:01:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366758921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:44,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:44,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:44,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873115231] [2024-06-14 14:01:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:44,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:44,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 672 transitions, 10861 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:44,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:44,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:44,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:46,294 INFO L124 PetriNetUnfolderBase]: 3635/6195 cut-off events. [2024-06-14 14:01:46,295 INFO L125 PetriNetUnfolderBase]: For 967449/967449 co-relation queries the response was YES. [2024-06-14 14:01:46,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52358 conditions, 6195 events. 3635/6195 cut-off events. For 967449/967449 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 43413 event pairs, 641 based on Foata normal form. 2/6194 useless extension candidates. Maximal degree in co-relation 52127. Up to 5463 conditions per place. [2024-06-14 14:01:46,415 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 644 selfloop transitions, 47 changer transitions 0/698 dead transitions. [2024-06-14 14:01:46,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 698 transitions, 12593 flow [2024-06-14 14:01:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:01:46,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:01:46,416 INFO L175 Difference]: Start difference. First operand has 531 places, 672 transitions, 10861 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:01:46,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 698 transitions, 12593 flow [2024-06-14 14:01:52,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 698 transitions, 12447 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:52,982 INFO L231 Difference]: Finished difference. Result has 534 places, 672 transitions, 10814 flow [2024-06-14 14:01:52,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10715, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10814, PETRI_PLACES=534, PETRI_TRANSITIONS=672} [2024-06-14 14:01:52,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-14 14:01:52,982 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 672 transitions, 10814 flow [2024-06-14 14:01:52,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:52,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:52,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:52,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 14:01:52,983 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:52,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:52,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1140714956, now seen corresponding path program 4 times [2024-06-14 14:01:52,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:52,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589704898] [2024-06-14 14:01:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:52,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:53,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:53,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589704898] [2024-06-14 14:01:53,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589704898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:53,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:53,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:53,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362653321] [2024-06-14 14:01:53,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:53,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:53,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:53,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:53,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:53,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 672 transitions, 10814 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:53,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:53,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:53,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:54,865 INFO L124 PetriNetUnfolderBase]: 3643/6212 cut-off events. [2024-06-14 14:01:54,865 INFO L125 PetriNetUnfolderBase]: For 980087/980087 co-relation queries the response was YES. [2024-06-14 14:01:54,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52423 conditions, 6212 events. 3643/6212 cut-off events. For 980087/980087 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 43561 event pairs, 648 based on Foata normal form. 2/6211 useless extension candidates. Maximal degree in co-relation 52191. Up to 5508 conditions per place. [2024-06-14 14:01:54,971 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 643 selfloop transitions, 45 changer transitions 0/695 dead transitions. [2024-06-14 14:01:54,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 695 transitions, 12286 flow [2024-06-14 14:01:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 14:01:54,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-14 14:01:54,972 INFO L175 Difference]: Start difference. First operand has 534 places, 672 transitions, 10814 flow. Second operand 7 states and 164 transitions. [2024-06-14 14:01:54,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 695 transitions, 12286 flow [2024-06-14 14:02:01,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 695 transitions, 12144 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:01,617 INFO L231 Difference]: Finished difference. Result has 534 places, 674 transitions, 10815 flow [2024-06-14 14:02:01,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10678, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10815, PETRI_PLACES=534, PETRI_TRANSITIONS=674} [2024-06-14 14:02:01,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-14 14:02:01,618 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 674 transitions, 10815 flow [2024-06-14 14:02:01,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:01,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:01,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 14:02:01,618 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 14:02:01,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash 432742794, now seen corresponding path program 5 times [2024-06-14 14:02:01,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:01,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253206111] [2024-06-14 14:02:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:01,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:01,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:01,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253206111] [2024-06-14 14:02:01,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253206111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:01,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:01,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:01,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675517918] [2024-06-14 14:02:01,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:01,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:01,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:01,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:01,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:01,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:01,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 674 transitions, 10815 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:01,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:01,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:01,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:03,473 INFO L124 PetriNetUnfolderBase]: 3664/6241 cut-off events. [2024-06-14 14:02:03,473 INFO L125 PetriNetUnfolderBase]: For 1014221/1014221 co-relation queries the response was YES. [2024-06-14 14:02:03,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52918 conditions, 6241 events. 3664/6241 cut-off events. For 1014221/1014221 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 43737 event pairs, 647 based on Foata normal form. 2/6238 useless extension candidates. Maximal degree in co-relation 52686. Up to 5516 conditions per place. [2024-06-14 14:02:03,585 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 643 selfloop transitions, 53 changer transitions 0/703 dead transitions. [2024-06-14 14:02:03,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 703 transitions, 12637 flow [2024-06-14 14:02:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-14 14:02:03,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-14 14:02:03,586 INFO L175 Difference]: Start difference. First operand has 534 places, 674 transitions, 10815 flow. Second operand 9 states and 203 transitions. [2024-06-14 14:02:03,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 703 transitions, 12637 flow [2024-06-14 14:02:10,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 703 transitions, 12522 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:10,056 INFO L231 Difference]: Finished difference. Result has 539 places, 678 transitions, 10908 flow [2024-06-14 14:02:10,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10700, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10908, PETRI_PLACES=539, PETRI_TRANSITIONS=678} [2024-06-14 14:02:10,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-14 14:02:10,056 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 678 transitions, 10908 flow [2024-06-14 14:02:10,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:10,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:10,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:10,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 14:02:10,057 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 14:02:10,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash 435599754, now seen corresponding path program 6 times [2024-06-14 14:02:10,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:10,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864554553] [2024-06-14 14:02:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:10,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:10,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864554553] [2024-06-14 14:02:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864554553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:10,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191814444] [2024-06-14 14:02:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:10,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:10,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:10,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:10,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 678 transitions, 10908 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:10,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:10,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:10,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:11,931 INFO L124 PetriNetUnfolderBase]: 3659/6236 cut-off events. [2024-06-14 14:02:11,931 INFO L125 PetriNetUnfolderBase]: For 1005838/1005838 co-relation queries the response was YES. [2024-06-14 14:02:12,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52698 conditions, 6236 events. 3659/6236 cut-off events. For 1005838/1005838 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 43769 event pairs, 650 based on Foata normal form. 2/6235 useless extension candidates. Maximal degree in co-relation 52464. Up to 5532 conditions per place. [2024-06-14 14:02:12,042 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 647 selfloop transitions, 47 changer transitions 0/701 dead transitions. [2024-06-14 14:02:12,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 701 transitions, 12352 flow [2024-06-14 14:02:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:02:12,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-14 14:02:12,043 INFO L175 Difference]: Start difference. First operand has 539 places, 678 transitions, 10908 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:02:12,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 701 transitions, 12352 flow [2024-06-14 14:02:18,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 701 transitions, 12202 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:18,844 INFO L231 Difference]: Finished difference. Result has 542 places, 678 transitions, 10857 flow [2024-06-14 14:02:18,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10758, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10857, PETRI_PLACES=542, PETRI_TRANSITIONS=678} [2024-06-14 14:02:18,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 499 predicate places. [2024-06-14 14:02:18,845 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 678 transitions, 10857 flow [2024-06-14 14:02:18,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:18,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:18,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:18,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 14:02:18,845 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 14:02:18,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2085547785, now seen corresponding path program 1 times [2024-06-14 14:02:18,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:18,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332395847] [2024-06-14 14:02:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:18,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:19,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:19,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332395847] [2024-06-14 14:02:19,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332395847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:19,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:19,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:19,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91509032] [2024-06-14 14:02:19,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:19,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:19,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:19,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:19,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:19,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 678 transitions, 10857 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:02:19,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:19,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:19,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:20,650 INFO L124 PetriNetUnfolderBase]: 3680/6261 cut-off events. [2024-06-14 14:02:20,650 INFO L125 PetriNetUnfolderBase]: For 1030073/1030073 co-relation queries the response was YES. [2024-06-14 14:02:20,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53177 conditions, 6261 events. 3680/6261 cut-off events. For 1030073/1030073 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 44042 event pairs, 675 based on Foata normal form. 1/6253 useless extension candidates. Maximal degree in co-relation 52942. Up to 5219 conditions per place. [2024-06-14 14:02:20,763 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 451 selfloop transitions, 247 changer transitions 0/705 dead transitions. [2024-06-14 14:02:20,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 705 transitions, 12726 flow [2024-06-14 14:02:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:02:20,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 14:02:20,763 INFO L175 Difference]: Start difference. First operand has 542 places, 678 transitions, 10857 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:02:20,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 705 transitions, 12726 flow [2024-06-14 14:02:27,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 705 transitions, 12622 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:02:27,473 INFO L231 Difference]: Finished difference. Result has 542 places, 687 transitions, 11529 flow [2024-06-14 14:02:27,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10753, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11529, PETRI_PLACES=542, PETRI_TRANSITIONS=687} [2024-06-14 14:02:27,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 499 predicate places. [2024-06-14 14:02:27,474 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 687 transitions, 11529 flow [2024-06-14 14:02:27,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:02:27,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:27,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:27,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 14:02:27,475 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 14:02:27,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:27,475 INFO L85 PathProgramCache]: Analyzing trace with hash -835332663, now seen corresponding path program 2 times [2024-06-14 14:02:27,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:27,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999216577] [2024-06-14 14:02:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:27,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:27,724 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 14:02:27,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:27,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999216577] [2024-06-14 14:02:27,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999216577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:27,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:27,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:27,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343565840] [2024-06-14 14:02:27,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:27,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:27,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:27,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:27,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 687 transitions, 11529 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 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 14:02:27,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:27,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:27,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:29,319 INFO L124 PetriNetUnfolderBase]: 3693/6293 cut-off events. [2024-06-14 14:02:29,319 INFO L125 PetriNetUnfolderBase]: For 1055563/1055563 co-relation queries the response was YES. [2024-06-14 14:02:29,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54332 conditions, 6293 events. 3693/6293 cut-off events. For 1055563/1055563 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 44275 event pairs, 650 based on Foata normal form. 1/6291 useless extension candidates. Maximal degree in co-relation 54095. Up to 5546 conditions per place. [2024-06-14 14:02:29,433 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 635 selfloop transitions, 80 changer transitions 0/722 dead transitions. [2024-06-14 14:02:29,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 722 transitions, 13429 flow [2024-06-14 14:02:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 14:02:29,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-14 14:02:29,434 INFO L175 Difference]: Start difference. First operand has 542 places, 687 transitions, 11529 flow. Second operand 9 states and 211 transitions. [2024-06-14 14:02:29,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 722 transitions, 13429 flow [2024-06-14 14:02:35,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 722 transitions, 13209 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:35,726 INFO L231 Difference]: Finished difference. Result has 547 places, 693 transitions, 11585 flow [2024-06-14 14:02:35,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11311, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11585, PETRI_PLACES=547, PETRI_TRANSITIONS=693} [2024-06-14 14:02:35,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 504 predicate places. [2024-06-14 14:02:35,726 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 693 transitions, 11585 flow [2024-06-14 14:02:35,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 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 14:02:35,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:35,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:35,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 14:02:35,727 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 14:02:35,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:35,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1786777803, now seen corresponding path program 3 times [2024-06-14 14:02:35,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:35,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903220976] [2024-06-14 14:02:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:35,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:36,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:36,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903220976] [2024-06-14 14:02:36,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903220976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:36,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:36,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:36,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337899517] [2024-06-14 14:02:36,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:36,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:36,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:36,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:36,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:36,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:36,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 693 transitions, 11585 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:36,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:36,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:36,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:37,627 INFO L124 PetriNetUnfolderBase]: 3690/6289 cut-off events. [2024-06-14 14:02:37,627 INFO L125 PetriNetUnfolderBase]: For 1044161/1044161 co-relation queries the response was YES. [2024-06-14 14:02:37,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54247 conditions, 6289 events. 3690/6289 cut-off events. For 1044161/1044161 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 44247 event pairs, 650 based on Foata normal form. 1/6287 useless extension candidates. Maximal degree in co-relation 54009. Up to 5510 conditions per place. [2024-06-14 14:02:37,742 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 607 selfloop transitions, 100 changer transitions 0/714 dead transitions. [2024-06-14 14:02:37,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 714 transitions, 13051 flow [2024-06-14 14:02:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 14:02:37,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-14 14:02:37,742 INFO L175 Difference]: Start difference. First operand has 547 places, 693 transitions, 11585 flow. Second operand 8 states and 187 transitions. [2024-06-14 14:02:37,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 714 transitions, 13051 flow [2024-06-14 14:02:44,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 714 transitions, 12939 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:44,485 INFO L231 Difference]: Finished difference. Result has 551 places, 693 transitions, 11683 flow [2024-06-14 14:02:44,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11473, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11683, PETRI_PLACES=551, PETRI_TRANSITIONS=693} [2024-06-14 14:02:44,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 508 predicate places. [2024-06-14 14:02:44,485 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 693 transitions, 11683 flow [2024-06-14 14:02:44,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:44,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:44,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:44,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 14:02:44,485 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 14:02:44,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash 62757213, now seen corresponding path program 4 times [2024-06-14 14:02:44,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:44,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949651733] [2024-06-14 14:02:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:44,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:44,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:44,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949651733] [2024-06-14 14:02:44,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949651733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:44,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:44,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70773163] [2024-06-14 14:02:44,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:44,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:44,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:44,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:44,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:44,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:44,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 693 transitions, 11683 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:44,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:44,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:44,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:46,473 INFO L124 PetriNetUnfolderBase]: 3703/6311 cut-off events. [2024-06-14 14:02:46,473 INFO L125 PetriNetUnfolderBase]: For 1068598/1068598 co-relation queries the response was YES. [2024-06-14 14:02:46,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54816 conditions, 6311 events. 3703/6311 cut-off events. For 1068598/1068598 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 44401 event pairs, 650 based on Foata normal form. 1/6309 useless extension candidates. Maximal degree in co-relation 54576. Up to 5515 conditions per place. [2024-06-14 14:02:46,590 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 600 selfloop transitions, 118 changer transitions 0/725 dead transitions. [2024-06-14 14:02:46,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 725 transitions, 13593 flow [2024-06-14 14:02:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:02:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:02:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-14 14:02:46,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 14:02:46,591 INFO L175 Difference]: Start difference. First operand has 551 places, 693 transitions, 11683 flow. Second operand 12 states and 264 transitions. [2024-06-14 14:02:46,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 725 transitions, 13593 flow [2024-06-14 14:02:53,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 725 transitions, 13389 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:53,733 INFO L231 Difference]: Finished difference. Result has 556 places, 699 transitions, 11847 flow [2024-06-14 14:02:53,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11481, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11847, PETRI_PLACES=556, PETRI_TRANSITIONS=699} [2024-06-14 14:02:53,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 513 predicate places. [2024-06-14 14:02:53,733 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 699 transitions, 11847 flow [2024-06-14 14:02:53,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:53,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:53,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:53,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 14:02:53,734 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:53,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash 55405563, now seen corresponding path program 5 times [2024-06-14 14:02:53,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:53,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989551613] [2024-06-14 14:02:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:53,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:54,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:54,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989551613] [2024-06-14 14:02:54,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989551613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:54,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:54,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:54,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852930626] [2024-06-14 14:02:54,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:54,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:54,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:54,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:54,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:54,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:54,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 699 transitions, 11847 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:54,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:54,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:54,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:55,671 INFO L124 PetriNetUnfolderBase]: 3700/6307 cut-off events. [2024-06-14 14:02:55,672 INFO L125 PetriNetUnfolderBase]: For 1057529/1057529 co-relation queries the response was YES. [2024-06-14 14:02:55,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54683 conditions, 6307 events. 3700/6307 cut-off events. For 1057529/1057529 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 44376 event pairs, 650 based on Foata normal form. 1/6305 useless extension candidates. Maximal degree in co-relation 54443. Up to 5524 conditions per place. [2024-06-14 14:02:55,791 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 613 selfloop transitions, 102 changer transitions 0/722 dead transitions. [2024-06-14 14:02:55,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 722 transitions, 13333 flow [2024-06-14 14:02:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:02:55,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:02:55,792 INFO L175 Difference]: Start difference. First operand has 556 places, 699 transitions, 11847 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:02:55,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 722 transitions, 13333 flow [2024-06-14 14:03:03,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 722 transitions, 13135 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:03,598 INFO L231 Difference]: Finished difference. Result has 557 places, 699 transitions, 11863 flow [2024-06-14 14:03:03,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11649, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11863, PETRI_PLACES=557, PETRI_TRANSITIONS=699} [2024-06-14 14:03:03,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 514 predicate places. [2024-06-14 14:03:03,598 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 699 transitions, 11863 flow [2024-06-14 14:03:03,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:03,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:03,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:03,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 14:03:03,599 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 14:03:03,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:03,599 INFO L85 PathProgramCache]: Analyzing trace with hash 55399983, now seen corresponding path program 6 times [2024-06-14 14:03:03,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:03,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497631575] [2024-06-14 14:03:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:03,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:03,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:03,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497631575] [2024-06-14 14:03:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497631575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:03,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:03,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:03:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714106173] [2024-06-14 14:03:03,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:03,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:03:03,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:03:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:03:03,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:03,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 699 transitions, 11863 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:03,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:03,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:03,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:05,482 INFO L124 PetriNetUnfolderBase]: 3697/6303 cut-off events. [2024-06-14 14:03:05,482 INFO L125 PetriNetUnfolderBase]: For 1046238/1046238 co-relation queries the response was YES. [2024-06-14 14:03:05,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54608 conditions, 6303 events. 3697/6303 cut-off events. For 1046238/1046238 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 44363 event pairs, 650 based on Foata normal form. 1/6301 useless extension candidates. Maximal degree in co-relation 54367. Up to 5484 conditions per place. [2024-06-14 14:03:05,602 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 582 selfloop transitions, 134 changer transitions 0/723 dead transitions. [2024-06-14 14:03:05,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 723 transitions, 13353 flow [2024-06-14 14:03:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-14 14:03:05,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-14 14:03:05,603 INFO L175 Difference]: Start difference. First operand has 557 places, 699 transitions, 11863 flow. Second operand 11 states and 249 transitions. [2024-06-14 14:03:05,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 723 transitions, 13353 flow [2024-06-14 14:03:11,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 723 transitions, 13129 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:03:11,204 INFO L231 Difference]: Finished difference. Result has 558 places, 699 transitions, 11917 flow [2024-06-14 14:03:11,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11639, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11917, PETRI_PLACES=558, PETRI_TRANSITIONS=699} [2024-06-14 14:03:11,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 515 predicate places. [2024-06-14 14:03:11,205 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 699 transitions, 11917 flow [2024-06-14 14:03:11,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:11,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:11,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 14:03:11,205 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 14:03:11,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1758203340, now seen corresponding path program 7 times [2024-06-14 14:03:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:11,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606100294] [2024-06-14 14:03:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:11,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:11,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606100294] [2024-06-14 14:03:11,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606100294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:11,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:11,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:11,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347291456] [2024-06-14 14:03:11,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:11,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:11,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:11,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:11,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:11,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 699 transitions, 11917 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:11,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:11,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:11,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:13,050 INFO L124 PetriNetUnfolderBase]: 3718/6323 cut-off events. [2024-06-14 14:03:13,051 INFO L125 PetriNetUnfolderBase]: For 1082813/1082816 co-relation queries the response was YES. [2024-06-14 14:03:13,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55317 conditions, 6323 events. 3718/6323 cut-off events. For 1082813/1082816 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 44530 event pairs, 668 based on Foata normal form. 2/6315 useless extension candidates. Maximal degree in co-relation 55076. Up to 5318 conditions per place. [2024-06-14 14:03:13,170 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 547 selfloop transitions, 194 changer transitions 0/748 dead transitions. [2024-06-14 14:03:13,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 748 transitions, 13937 flow [2024-06-14 14:03:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-14 14:03:13,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:03:13,171 INFO L175 Difference]: Start difference. First operand has 558 places, 699 transitions, 11917 flow. Second operand 11 states and 264 transitions. [2024-06-14 14:03:13,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 748 transitions, 13937 flow [2024-06-14 14:03:19,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 748 transitions, 13481 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-06-14 14:03:19,934 INFO L231 Difference]: Finished difference. Result has 557 places, 703 transitions, 11988 flow [2024-06-14 14:03:19,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11463, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11988, PETRI_PLACES=557, PETRI_TRANSITIONS=703} [2024-06-14 14:03:19,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 514 predicate places. [2024-06-14 14:03:19,935 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 703 transitions, 11988 flow [2024-06-14 14:03:19,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:19,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:19,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:19,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 14:03:19,936 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 14:03:19,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1369427574, now seen corresponding path program 8 times [2024-06-14 14:03:19,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:19,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086650185] [2024-06-14 14:03:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:19,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:20,217 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 14:03:20,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:20,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086650185] [2024-06-14 14:03:20,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086650185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:20,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:20,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:20,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680838237] [2024-06-14 14:03:20,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:20,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:20,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:20,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:20,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:20,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 703 transitions, 11988 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:20,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:20,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:20,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:21,769 INFO L124 PetriNetUnfolderBase]: 3726/6340 cut-off events. [2024-06-14 14:03:21,769 INFO L125 PetriNetUnfolderBase]: For 1086282/1086285 co-relation queries the response was YES. [2024-06-14 14:03:21,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55423 conditions, 6340 events. 3726/6340 cut-off events. For 1086282/1086285 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 44666 event pairs, 675 based on Foata normal form. 2/6332 useless extension candidates. Maximal degree in co-relation 55184. Up to 5365 conditions per place. [2024-06-14 14:03:21,885 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 547 selfloop transitions, 191 changer transitions 0/745 dead transitions. [2024-06-14 14:03:21,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 745 transitions, 13632 flow [2024-06-14 14:03:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-14 14:03:21,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-14 14:03:21,886 INFO L175 Difference]: Start difference. First operand has 557 places, 703 transitions, 11988 flow. Second operand 11 states and 259 transitions. [2024-06-14 14:03:21,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 745 transitions, 13632 flow [2024-06-14 14:03:28,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 745 transitions, 13274 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:28,787 INFO L231 Difference]: Finished difference. Result has 562 places, 705 transitions, 12089 flow [2024-06-14 14:03:28,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11664, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12089, PETRI_PLACES=562, PETRI_TRANSITIONS=705} [2024-06-14 14:03:28,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 519 predicate places. [2024-06-14 14:03:28,788 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 705 transitions, 12089 flow [2024-06-14 14:03:28,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:28,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:28,788 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 14:03:28,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 14:03:28,788 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 14:03:28,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash -272592332, now seen corresponding path program 9 times [2024-06-14 14:03:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:28,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27012074] [2024-06-14 14:03:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:28,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:29,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:29,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27012074] [2024-06-14 14:03:29,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27012074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:29,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:29,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:29,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228561553] [2024-06-14 14:03:29,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:29,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:29,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:29,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:29,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:29,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 705 transitions, 12089 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:29,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:29,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:29,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:30,659 INFO L124 PetriNetUnfolderBase]: 3734/6352 cut-off events. [2024-06-14 14:03:30,659 INFO L125 PetriNetUnfolderBase]: For 1097599/1097602 co-relation queries the response was YES. [2024-06-14 14:03:30,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55703 conditions, 6352 events. 3734/6352 cut-off events. For 1097599/1097602 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 44701 event pairs, 675 based on Foata normal form. 2/6344 useless extension candidates. Maximal degree in co-relation 55462. Up to 5377 conditions per place. [2024-06-14 14:03:30,777 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 545 selfloop transitions, 193 changer transitions 0/745 dead transitions. [2024-06-14 14:03:30,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 745 transitions, 13697 flow [2024-06-14 14:03:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:03:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:03:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 273 transitions. [2024-06-14 14:03:30,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 14:03:30,778 INFO L175 Difference]: Start difference. First operand has 562 places, 705 transitions, 12089 flow. Second operand 12 states and 273 transitions. [2024-06-14 14:03:30,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 745 transitions, 13697 flow [2024-06-14 14:03:38,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 745 transitions, 13292 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:38,457 INFO L231 Difference]: Finished difference. Result has 565 places, 707 transitions, 12117 flow [2024-06-14 14:03:38,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11684, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12117, PETRI_PLACES=565, PETRI_TRANSITIONS=707} [2024-06-14 14:03:38,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 522 predicate places. [2024-06-14 14:03:38,457 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 707 transitions, 12117 flow [2024-06-14 14:03:38,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:38,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:38,458 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 14:03:38,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 14:03:38,458 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 14:03:38,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:38,458 INFO L85 PathProgramCache]: Analyzing trace with hash 567253526, now seen corresponding path program 10 times [2024-06-14 14:03:38,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:38,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673394629] [2024-06-14 14:03:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:38,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673394629] [2024-06-14 14:03:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673394629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:38,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:38,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:38,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273294438] [2024-06-14 14:03:38,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:38,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:38,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 707 transitions, 12117 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:38,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:38,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:38,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:40,422 INFO L124 PetriNetUnfolderBase]: 3742/6364 cut-off events. [2024-06-14 14:03:40,422 INFO L125 PetriNetUnfolderBase]: For 1111435/1111438 co-relation queries the response was YES. [2024-06-14 14:03:40,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55867 conditions, 6364 events. 3742/6364 cut-off events. For 1111435/1111438 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 44762 event pairs, 675 based on Foata normal form. 2/6356 useless extension candidates. Maximal degree in co-relation 55625. Up to 5389 conditions per place. [2024-06-14 14:03:40,544 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 541 selfloop transitions, 193 changer transitions 0/741 dead transitions. [2024-06-14 14:03:40,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 741 transitions, 13705 flow [2024-06-14 14:03:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:03:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:03:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-14 14:03:40,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2024-06-14 14:03:40,545 INFO L175 Difference]: Start difference. First operand has 565 places, 707 transitions, 12117 flow. Second operand 12 states and 269 transitions. [2024-06-14 14:03:40,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 741 transitions, 13705 flow [2024-06-14 14:03:47,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 741 transitions, 13292 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 14:03:47,926 INFO L231 Difference]: Finished difference. Result has 567 places, 709 transitions, 12141 flow [2024-06-14 14:03:47,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11704, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12141, PETRI_PLACES=567, PETRI_TRANSITIONS=709} [2024-06-14 14:03:47,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 524 predicate places. [2024-06-14 14:03:47,927 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 709 transitions, 12141 flow [2024-06-14 14:03:47,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:47,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:47,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:47,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-14 14:03:47,927 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:47,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1753346415, now seen corresponding path program 7 times [2024-06-14 14:03:47,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:47,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134141346] [2024-06-14 14:03:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:47,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:48,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:48,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134141346] [2024-06-14 14:03:48,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134141346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:48,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:48,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:48,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016690316] [2024-06-14 14:03:48,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:48,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:48,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:48,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:48,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 709 transitions, 12141 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:03:48,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:48,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:48,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:49,982 INFO L124 PetriNetUnfolderBase]: 3771/6413 cut-off events. [2024-06-14 14:03:49,982 INFO L125 PetriNetUnfolderBase]: For 1147721/1147721 co-relation queries the response was YES. [2024-06-14 14:03:50,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56723 conditions, 6413 events. 3771/6413 cut-off events. For 1147721/1147721 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 45214 event pairs, 665 based on Foata normal form. 1/6408 useless extension candidates. Maximal degree in co-relation 56480. Up to 4988 conditions per place. [2024-06-14 14:03:50,109 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 364 selfloop transitions, 385 changer transitions 0/756 dead transitions. [2024-06-14 14:03:50,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 756 transitions, 14840 flow [2024-06-14 14:03:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-14 14:03:50,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738095238095238 [2024-06-14 14:03:50,110 INFO L175 Difference]: Start difference. First operand has 567 places, 709 transitions, 12141 flow. Second operand 10 states and 241 transitions. [2024-06-14 14:03:50,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 756 transitions, 14840 flow [2024-06-14 14:03:58,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 756 transitions, 14423 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-14 14:03:58,471 INFO L231 Difference]: Finished difference. Result has 567 places, 721 transitions, 12703 flow [2024-06-14 14:03:58,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11724, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12703, PETRI_PLACES=567, PETRI_TRANSITIONS=721} [2024-06-14 14:03:58,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 524 predicate places. [2024-06-14 14:03:58,471 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 721 transitions, 12703 flow [2024-06-14 14:03:58,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:03:58,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:58,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:58,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-14 14:03:58,472 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:58,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2136271835, now seen corresponding path program 8 times [2024-06-14 14:03:58,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:58,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172048623] [2024-06-14 14:03:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:58,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172048623] [2024-06-14 14:03:58,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172048623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:58,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:58,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:58,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871850160] [2024-06-14 14:03:58,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:58,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:58,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:58,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 721 transitions, 12703 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:03:58,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:58,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:58,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:00,398 INFO L124 PetriNetUnfolderBase]: 3776/6422 cut-off events. [2024-06-14 14:04:00,399 INFO L125 PetriNetUnfolderBase]: For 1163856/1163856 co-relation queries the response was YES. [2024-06-14 14:04:00,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57278 conditions, 6422 events. 3776/6422 cut-off events. For 1163856/1163856 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 45310 event pairs, 665 based on Foata normal form. 1/6417 useless extension candidates. Maximal degree in co-relation 57034. Up to 4994 conditions per place. [2024-06-14 14:04:00,519 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 435 changer transitions 0/763 dead transitions. [2024-06-14 14:04:00,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 763 transitions, 15283 flow [2024-06-14 14:04:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-14 14:04:00,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:04:00,520 INFO L175 Difference]: Start difference. First operand has 567 places, 721 transitions, 12703 flow. Second operand 11 states and 264 transitions. [2024-06-14 14:04:00,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 763 transitions, 15283 flow [2024-06-14 14:04:08,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 763 transitions, 14416 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:08,515 INFO L231 Difference]: Finished difference. Result has 571 places, 724 transitions, 12766 flow [2024-06-14 14:04:08,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11845, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12766, PETRI_PLACES=571, PETRI_TRANSITIONS=724} [2024-06-14 14:04:08,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 528 predicate places. [2024-06-14 14:04:08,516 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 724 transitions, 12766 flow [2024-06-14 14:04:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:04:08,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:08,516 INFO L208 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 14:04:08,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-14 14:04:08,516 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:08,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:08,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1715632713, now seen corresponding path program 9 times [2024-06-14 14:04:08,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:08,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162395702] [2024-06-14 14:04:08,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:08,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:08,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162395702] [2024-06-14 14:04:08,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162395702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:08,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:08,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:08,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936171206] [2024-06-14 14:04:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:08,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:08,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:08,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:08,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:08,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:08,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 724 transitions, 12766 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:04:08,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:08,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:08,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:10,444 INFO L124 PetriNetUnfolderBase]: 3789/6444 cut-off events. [2024-06-14 14:04:10,444 INFO L125 PetriNetUnfolderBase]: For 1191586/1191586 co-relation queries the response was YES. [2024-06-14 14:04:10,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57177 conditions, 6444 events. 3789/6444 cut-off events. For 1191586/1191586 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 45524 event pairs, 665 based on Foata normal form. 1/6439 useless extension candidates. Maximal degree in co-relation 56934. Up to 5009 conditions per place. [2024-06-14 14:04:10,567 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 448 changer transitions 0/768 dead transitions. [2024-06-14 14:04:10,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 768 transitions, 15406 flow [2024-06-14 14:04:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:04:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:04:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 297 transitions. [2024-06-14 14:04:10,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439560439560439 [2024-06-14 14:04:10,568 INFO L175 Difference]: Start difference. First operand has 571 places, 724 transitions, 12766 flow. Second operand 13 states and 297 transitions. [2024-06-14 14:04:10,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 768 transitions, 15406 flow [2024-06-14 14:04:18,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 768 transitions, 14303 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 14:04:18,902 INFO L231 Difference]: Finished difference. Result has 575 places, 730 transitions, 12667 flow [2024-06-14 14:04:18,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11681, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12667, PETRI_PLACES=575, PETRI_TRANSITIONS=730} [2024-06-14 14:04:18,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 532 predicate places. [2024-06-14 14:04:18,903 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 730 transitions, 12667 flow [2024-06-14 14:04:18,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:04:18,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:18,903 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 14:04:18,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-14 14:04:18,903 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:18,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:18,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1811530715, now seen corresponding path program 10 times [2024-06-14 14:04:18,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:18,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123655690] [2024-06-14 14:04:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:18,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:19,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:19,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123655690] [2024-06-14 14:04:19,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123655690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:19,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:19,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:19,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099412990] [2024-06-14 14:04:19,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:19,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:19,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:19,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:19,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:19,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:19,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 730 transitions, 12667 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:04:19,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:19,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:19,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:20,865 INFO L124 PetriNetUnfolderBase]: 3786/6440 cut-off events. [2024-06-14 14:04:20,865 INFO L125 PetriNetUnfolderBase]: For 1192188/1192188 co-relation queries the response was YES. [2024-06-14 14:04:20,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56953 conditions, 6440 events. 3786/6440 cut-off events. For 1192188/1192188 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 45491 event pairs, 665 based on Foata normal form. 1/6435 useless extension candidates. Maximal degree in co-relation 56709. Up to 5006 conditions per place. [2024-06-14 14:04:20,989 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 444 changer transitions 0/766 dead transitions. [2024-06-14 14:04:20,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 766 transitions, 14893 flow [2024-06-14 14:04:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:04:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:04:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-14 14:04:20,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 14:04:20,990 INFO L175 Difference]: Start difference. First operand has 575 places, 730 transitions, 12667 flow. Second operand 12 states and 280 transitions. [2024-06-14 14:04:20,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 766 transitions, 14893 flow [2024-06-14 14:04:29,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 766 transitions, 14109 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 14:04:29,518 INFO L231 Difference]: Finished difference. Result has 578 places, 730 transitions, 12777 flow [2024-06-14 14:04:29,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11883, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12777, PETRI_PLACES=578, PETRI_TRANSITIONS=730} [2024-06-14 14:04:29,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 535 predicate places. [2024-06-14 14:04:29,519 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 730 transitions, 12777 flow [2024-06-14 14:04:29,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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 14:04:29,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:29,519 INFO L208 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 14:04:29,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-14 14:04:29,519 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:29,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash -489157901, now seen corresponding path program 11 times [2024-06-14 14:04:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045098291] [2024-06-14 14:04:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:29,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:29,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045098291] [2024-06-14 14:04:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045098291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:29,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:29,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:04:29,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948955583] [2024-06-14 14:04:29,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:29,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:04:29,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:29,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:04:29,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:04:29,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:29,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 730 transitions, 12777 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:29,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:29,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:29,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:31,865 INFO L124 PetriNetUnfolderBase]: 3791/6444 cut-off events. [2024-06-14 14:04:31,865 INFO L125 PetriNetUnfolderBase]: For 1208505/1208508 co-relation queries the response was YES. [2024-06-14 14:04:31,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57181 conditions, 6444 events. 3791/6444 cut-off events. For 1208505/1208508 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 45426 event pairs, 702 based on Foata normal form. 1/6431 useless extension candidates. Maximal degree in co-relation 56936. Up to 5254 conditions per place. [2024-06-14 14:04:31,977 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 334 changer transitions 0/770 dead transitions. [2024-06-14 14:04:31,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 770 transitions, 14761 flow [2024-06-14 14:04:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-14 14:04:31,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670995670995671 [2024-06-14 14:04:31,978 INFO L175 Difference]: Start difference. First operand has 578 places, 730 transitions, 12777 flow. Second operand 11 states and 262 transitions. [2024-06-14 14:04:31,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 770 transitions, 14761 flow [2024-06-14 14:04:40,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 770 transitions, 13889 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:04:40,630 INFO L231 Difference]: Finished difference. Result has 580 places, 733 transitions, 12639 flow [2024-06-14 14:04:40,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11911, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12639, PETRI_PLACES=580, PETRI_TRANSITIONS=733} [2024-06-14 14:04:40,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 537 predicate places. [2024-06-14 14:04:40,631 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 733 transitions, 12639 flow [2024-06-14 14:04:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:40,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:40,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-14 14:04:40,631 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:40,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:40,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1749627345, now seen corresponding path program 12 times [2024-06-14 14:04:40,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:40,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213439146] [2024-06-14 14:04:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:40,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:40,918 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 14:04:40,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:40,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213439146] [2024-06-14 14:04:40,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213439146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:40,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:40,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:04:40,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316049365] [2024-06-14 14:04:40,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:40,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:04:40,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:04:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:04:41,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:41,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 733 transitions, 12639 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:41,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:41,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:41,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:42,888 INFO L124 PetriNetUnfolderBase]: 3796/6453 cut-off events. [2024-06-14 14:04:42,888 INFO L125 PetriNetUnfolderBase]: For 1222015/1222018 co-relation queries the response was YES. [2024-06-14 14:04:42,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57091 conditions, 6453 events. 3796/6453 cut-off events. For 1222015/1222018 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 45526 event pairs, 702 based on Foata normal form. 1/6440 useless extension candidates. Maximal degree in co-relation 56845. Up to 5018 conditions per place. [2024-06-14 14:04:42,999 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 447 changer transitions 0/778 dead transitions. [2024-06-14 14:04:42,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 778 transitions, 14967 flow [2024-06-14 14:04:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:04:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:04:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 288 transitions. [2024-06-14 14:04:43,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:04:43,000 INFO L175 Difference]: Start difference. First operand has 580 places, 733 transitions, 12639 flow. Second operand 12 states and 288 transitions. [2024-06-14 14:04:43,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 778 transitions, 14967 flow [2024-06-14 14:04:51,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 778 transitions, 14273 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 14:04:51,480 INFO L231 Difference]: Finished difference. Result has 583 places, 736 transitions, 12899 flow [2024-06-14 14:04:51,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11945, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12899, PETRI_PLACES=583, PETRI_TRANSITIONS=736} [2024-06-14 14:04:51,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 540 predicate places. [2024-06-14 14:04:51,480 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 736 transitions, 12899 flow [2024-06-14 14:04:51,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:51,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:51,481 INFO L208 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 14:04:51,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-14 14:04:51,481 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:51,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:51,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1520910665, now seen corresponding path program 13 times [2024-06-14 14:04:51,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:51,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268329481] [2024-06-14 14:04:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:51,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:51,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:51,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268329481] [2024-06-14 14:04:51,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268329481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:51,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:51,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:04:51,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767642233] [2024-06-14 14:04:51,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:51,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:04:51,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:51,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:04:51,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:04:51,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:51,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 736 transitions, 12899 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:51,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:51,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:51,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:53,803 INFO L124 PetriNetUnfolderBase]: 3809/6476 cut-off events. [2024-06-14 14:04:53,803 INFO L125 PetriNetUnfolderBase]: For 1250639/1250642 co-relation queries the response was YES. [2024-06-14 14:04:53,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57740 conditions, 6476 events. 3809/6476 cut-off events. For 1250639/1250642 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 45727 event pairs, 701 based on Foata normal form. 1/6464 useless extension candidates. Maximal degree in co-relation 57493. Up to 5033 conditions per place. [2024-06-14 14:04:53,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 458 changer transitions 0/785 dead transitions. [2024-06-14 14:04:53,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 785 transitions, 15618 flow [2024-06-14 14:04:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:04:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:04:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 336 transitions. [2024-06-14 14:04:53,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 14:04:53,928 INFO L175 Difference]: Start difference. First operand has 583 places, 736 transitions, 12899 flow. Second operand 15 states and 336 transitions. [2024-06-14 14:04:53,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 785 transitions, 15618 flow [2024-06-14 14:05:02,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 785 transitions, 14856 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:02,142 INFO L231 Difference]: Finished difference. Result has 589 places, 742 transitions, 13170 flow [2024-06-14 14:05:02,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12143, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13170, PETRI_PLACES=589, PETRI_TRANSITIONS=742} [2024-06-14 14:05:02,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 546 predicate places. [2024-06-14 14:05:02,142 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 742 transitions, 13170 flow [2024-06-14 14:05:02,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:02,142 INFO L208 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 14:05:02,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-14 14:05:02,143 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:02,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:02,143 INFO L85 PathProgramCache]: Analyzing trace with hash -193114653, now seen corresponding path program 14 times [2024-06-14 14:05:02,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:02,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307209605] [2024-06-14 14:05:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:02,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:02,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:02,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307209605] [2024-06-14 14:05:02,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307209605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:02,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:02,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:05:02,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983517880] [2024-06-14 14:05:02,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:02,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:05:02,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:02,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:05:02,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:05:02,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:02,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 742 transitions, 13170 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:02,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:02,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:04,517 INFO L124 PetriNetUnfolderBase]: 3830/6512 cut-off events. [2024-06-14 14:05:04,517 INFO L125 PetriNetUnfolderBase]: For 1292517/1292520 co-relation queries the response was YES. [2024-06-14 14:05:04,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58512 conditions, 6512 events. 3830/6512 cut-off events. For 1292517/1292520 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 46073 event pairs, 699 based on Foata normal form. 1/6501 useless extension candidates. Maximal degree in co-relation 58264. Up to 5057 conditions per place. [2024-06-14 14:05:04,642 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 468 changer transitions 0/795 dead transitions. [2024-06-14 14:05:04,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 795 transitions, 16295 flow [2024-06-14 14:05:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:05:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:05:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 341 transitions. [2024-06-14 14:05:04,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412698412698412 [2024-06-14 14:05:04,643 INFO L175 Difference]: Start difference. First operand has 589 places, 742 transitions, 13170 flow. Second operand 15 states and 341 transitions. [2024-06-14 14:05:04,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 795 transitions, 16295 flow [2024-06-14 14:05:14,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 795 transitions, 15506 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-14 14:05:14,484 INFO L231 Difference]: Finished difference. Result has 593 places, 751 transitions, 13494 flow [2024-06-14 14:05:14,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12390, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13494, PETRI_PLACES=593, PETRI_TRANSITIONS=751} [2024-06-14 14:05:14,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 550 predicate places. [2024-06-14 14:05:14,485 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 751 transitions, 13494 flow [2024-06-14 14:05:14,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:14,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:14,485 INFO L208 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 14:05:14,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-14 14:05:14,485 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:14,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:14,485 INFO L85 PathProgramCache]: Analyzing trace with hash -272587217, now seen corresponding path program 15 times [2024-06-14 14:05:14,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:14,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39799883] [2024-06-14 14:05:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:14,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:14,764 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 14:05:14,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:14,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39799883] [2024-06-14 14:05:14,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39799883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:14,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:14,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:05:14,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192246889] [2024-06-14 14:05:14,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:14,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:05:14,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:14,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:05:14,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:05:14,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:14,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 751 transitions, 13494 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:14,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:14,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:14,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:16,728 INFO L124 PetriNetUnfolderBase]: 3827/6508 cut-off events. [2024-06-14 14:05:16,728 INFO L125 PetriNetUnfolderBase]: For 1296250/1296253 co-relation queries the response was YES. [2024-06-14 14:05:16,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58504 conditions, 6508 events. 3827/6508 cut-off events. For 1296250/1296253 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 46068 event pairs, 699 based on Foata normal form. 1/6497 useless extension candidates. Maximal degree in co-relation 58255. Up to 5054 conditions per place. [2024-06-14 14:05:16,843 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 464 changer transitions 0/796 dead transitions. [2024-06-14 14:05:16,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 796 transitions, 16460 flow [2024-06-14 14:05:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-14 14:05:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-14 14:05:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 362 transitions. [2024-06-14 14:05:16,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-14 14:05:16,844 INFO L175 Difference]: Start difference. First operand has 593 places, 751 transitions, 13494 flow. Second operand 16 states and 362 transitions. [2024-06-14 14:05:16,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 796 transitions, 16460 flow [2024-06-14 14:05:24,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 796 transitions, 15446 flow, removed 35 selfloop flow, removed 12 redundant places. [2024-06-14 14:05:24,840 INFO L231 Difference]: Finished difference. Result has 597 places, 751 transitions, 13414 flow [2024-06-14 14:05:24,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12480, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13414, PETRI_PLACES=597, PETRI_TRANSITIONS=751} [2024-06-14 14:05:24,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 554 predicate places. [2024-06-14 14:05:24,840 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 751 transitions, 13414 flow [2024-06-14 14:05:24,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:24,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:24,841 INFO L208 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 14:05:24,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-14 14:05:24,841 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:24,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash 119587699, now seen corresponding path program 16 times [2024-06-14 14:05:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:24,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996589925] [2024-06-14 14:05:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:24,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:25,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:25,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996589925] [2024-06-14 14:05:25,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996589925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:25,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:25,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:05:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833621347] [2024-06-14 14:05:25,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:05:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:05:25,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:05:25,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:25,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 751 transitions, 13414 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:25,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:25,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:25,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:27,223 INFO L124 PetriNetUnfolderBase]: 3832/6516 cut-off events. [2024-06-14 14:05:27,223 INFO L125 PetriNetUnfolderBase]: For 1310993/1310996 co-relation queries the response was YES. [2024-06-14 14:05:27,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58560 conditions, 6516 events. 3832/6516 cut-off events. For 1310993/1310996 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 46070 event pairs, 701 based on Foata normal form. 1/6504 useless extension candidates. Maximal degree in co-relation 58310. Up to 5060 conditions per place. [2024-06-14 14:05:27,336 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 470 changer transitions 0/799 dead transitions. [2024-06-14 14:05:27,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 799 transitions, 16118 flow [2024-06-14 14:05:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-14 14:05:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-14 14:05:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 372 transitions. [2024-06-14 14:05:27,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210084033613446 [2024-06-14 14:05:27,337 INFO L175 Difference]: Start difference. First operand has 597 places, 751 transitions, 13414 flow. Second operand 17 states and 372 transitions. [2024-06-14 14:05:27,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 799 transitions, 16118 flow [2024-06-14 14:05:35,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 799 transitions, 15010 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-14 14:05:35,341 INFO L231 Difference]: Finished difference. Result has 601 places, 754 transitions, 13298 flow [2024-06-14 14:05:35,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12312, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13298, PETRI_PLACES=601, PETRI_TRANSITIONS=754} [2024-06-14 14:05:35,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 558 predicate places. [2024-06-14 14:05:35,342 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 754 transitions, 13298 flow [2024-06-14 14:05:35,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:35,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:35,342 INFO L208 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 14:05:35,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-14 14:05:35,343 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:35,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:35,343 INFO L85 PathProgramCache]: Analyzing trace with hash -159538863, now seen corresponding path program 17 times [2024-06-14 14:05:35,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:35,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019375253] [2024-06-14 14:05:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:35,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:35,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:35,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019375253] [2024-06-14 14:05:35,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019375253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:35,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:35,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:05:35,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908318345] [2024-06-14 14:05:35,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:35,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:05:35,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:35,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:05:35,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:05:35,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:35,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 754 transitions, 13298 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:35,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:35,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:35,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:37,668 INFO L124 PetriNetUnfolderBase]: 3829/6513 cut-off events. [2024-06-14 14:05:37,668 INFO L125 PetriNetUnfolderBase]: For 1311584/1311587 co-relation queries the response was YES. [2024-06-14 14:05:37,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58349 conditions, 6513 events. 3829/6513 cut-off events. For 1311584/1311587 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 46093 event pairs, 699 based on Foata normal form. 1/6502 useless extension candidates. Maximal degree in co-relation 58098. Up to 5057 conditions per place. [2024-06-14 14:05:37,789 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 467 changer transitions 0/796 dead transitions. [2024-06-14 14:05:37,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 796 transitions, 15950 flow [2024-06-14 14:05:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:05:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:05:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 323 transitions. [2024-06-14 14:05:37,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5493197278911565 [2024-06-14 14:05:37,790 INFO L175 Difference]: Start difference. First operand has 601 places, 754 transitions, 13298 flow. Second operand 14 states and 323 transitions. [2024-06-14 14:05:37,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 796 transitions, 15950 flow [2024-06-14 14:05:48,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 796 transitions, 14984 flow, removed 13 selfloop flow, removed 15 redundant places. [2024-06-14 14:05:48,353 INFO L231 Difference]: Finished difference. Result has 600 places, 754 transitions, 13272 flow [2024-06-14 14:05:48,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12332, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13272, PETRI_PLACES=600, PETRI_TRANSITIONS=754} [2024-06-14 14:05:48,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 557 predicate places. [2024-06-14 14:05:48,354 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 754 transitions, 13272 flow [2024-06-14 14:05:48,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:48,354 INFO L208 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 14:05:48,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-14 14:05:48,354 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:48,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash 107623249, now seen corresponding path program 18 times [2024-06-14 14:05:48,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:48,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291664816] [2024-06-14 14:05:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:48,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:48,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:48,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291664816] [2024-06-14 14:05:48,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291664816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:48,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:48,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:05:48,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840690319] [2024-06-14 14:05:48,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:48,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:05:48,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:05:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:05:48,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:48,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 754 transitions, 13272 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:48,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:48,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:50,749 INFO L124 PetriNetUnfolderBase]: 3826/6507 cut-off events. [2024-06-14 14:05:50,749 INFO L125 PetriNetUnfolderBase]: For 1313576/1313579 co-relation queries the response was YES. [2024-06-14 14:05:50,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58230 conditions, 6507 events. 3826/6507 cut-off events. For 1313576/1313579 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 46057 event pairs, 702 based on Foata normal form. 1/6494 useless extension candidates. Maximal degree in co-relation 57978. Up to 5054 conditions per place. [2024-06-14 14:05:50,877 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 467 changer transitions 0/794 dead transitions. [2024-06-14 14:05:50,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 794 transitions, 15596 flow [2024-06-14 14:05:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:05:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:05:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 302 transitions. [2024-06-14 14:05:50,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531135531135531 [2024-06-14 14:05:50,879 INFO L175 Difference]: Start difference. First operand has 600 places, 754 transitions, 13272 flow. Second operand 13 states and 302 transitions. [2024-06-14 14:05:50,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 794 transitions, 15596 flow Killed by 15