./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_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/safe004_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe004_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe004_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-bcb38a6-m [2024-06-03 20:33:21,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:33:21,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:33:21,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:33:21,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:33:21,920 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:33:21,920 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:33:21,921 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:33:21,921 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:33:21,924 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:33:21,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:33:21,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:33:21,925 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:33:21,926 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:33:21,927 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:33:21,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:33:21,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:33:21,927 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:33:21,928 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:33:21,929 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:33:21,929 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:33:21,929 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:33:21,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:33:21,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:33:21,930 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:33:21,930 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:33:21,930 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:33:21,931 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:33:21,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:33:21,931 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:33:21,932 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:33:21,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:33:21,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:33:21,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:33:21,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:33:21,933 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:33:21,933 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:33:21,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:33:21,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:33:21,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:33:21,934 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:33:21,934 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:33:21,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:33:21,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:33:22,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:33:22,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:33:22,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:33:22,186 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:33:22,186 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:33:22,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe004_tso.yml/witness.yml [2024-06-03 20:33:22,310 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:33:22,310 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:33:22,311 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-03 20:33:23,396 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:33:23,620 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:33:23,626 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-03 20:33:23,642 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/729cd5a84/5a60056adff54fe080270a429efc1db6/FLAG3123caab8 [2024-06-03 20:33:23,666 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/729cd5a84/5a60056adff54fe080270a429efc1db6 [2024-06-03 20:33:23,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:33:23,668 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:33:23,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:33:23,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:33:23,673 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:33:23,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:33:22" (1/2) ... [2024-06-03 20:33:23,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433b5dd2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:33:23, skipping insertion in model container [2024-06-03 20:33:23,675 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:33:22" (1/2) ... [2024-06-03 20:33:23,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c14768a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:33:23, skipping insertion in model container [2024-06-03 20:33:23,676 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:33:23" (2/2) ... [2024-06-03 20:33:23,677 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433b5dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:23, skipping insertion in model container [2024-06-03 20:33:23,677 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:33:23" (2/2) ... [2024-06-03 20:33:23,677 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:33:23,712 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:33:23,713 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! 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 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((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$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:33:23,713 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! 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 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((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$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:33:23,713 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! 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 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((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$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:33:23,713 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:33:23,713 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-03 20:33:23,743 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:33:24,045 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:33:24,053 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:33:24,176 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:33:24,214 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:33:24,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24 WrapperNode [2024-06-03 20:33:24,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:33:24,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:33:24,215 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:33:24,215 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:33:24,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,282 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-03 20:33:24,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:33:24,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:33:24,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:33:24,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:33:24,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,319 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,330 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]. [2024-06-03 20:33:24,332 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,332 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,338 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,339 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,340 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,342 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,343 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:33:24,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:33:24,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:33:24,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:33:24,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (1/1) ... [2024-06-03 20:33:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:33:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:33:24,380 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) [2024-06-03 20:33:24,381 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 [2024-06-03 20:33:24,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:33:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:33:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:33:24,407 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:33:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:33:24,408 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:33:24,408 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:33:24,408 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:33:24,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:33:24,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:33:24,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:33:24,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:33:24,410 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:33:24,511 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:33:24,513 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:33:24,803 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:33:24,803 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:33:24,865 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:33:24,865 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:33:24,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:33:24 BoogieIcfgContainer [2024-06-03 20:33:24,866 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:33:24,867 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:33:24,867 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:33:24,870 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:33:24,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:33:22" (1/4) ... [2024-06-03 20:33:24,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5391d7fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:33:24, skipping insertion in model container [2024-06-03 20:33:24,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:33:23" (2/4) ... [2024-06-03 20:33:24,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5391d7fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:33:24, skipping insertion in model container [2024-06-03 20:33:24,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:24" (3/4) ... [2024-06-03 20:33:24,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5391d7fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:33:24, skipping insertion in model container [2024-06-03 20:33:24,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:33:24" (4/4) ... [2024-06-03 20:33:24,873 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_tso.i [2024-06-03 20:33:24,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:33:24,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:33:24,888 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:33:24,931 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:33:24,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:33:24,987 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 20:33:24,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:33:24,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:33:24,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:33:24,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 20:33:25,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:33:25,009 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;@2d474f93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:33:25,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:33:25,013 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:33:25,013 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:33:25,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:33:25,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:25,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:33:25,016 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)] === [2024-06-03 20:33:25,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1793314465, now seen corresponding path program 1 times [2024-06-03 20:33:25,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:25,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13759825] [2024-06-03 20:33:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:25,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:25,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:25,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13759825] [2024-06-03 20:33:25,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13759825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:25,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:25,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:33:25,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190055217] [2024-06-03 20:33:25,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:25,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:33:25,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:25,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:33:25,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:33:25,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-03 20:33:25,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:25,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:25,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-03 20:33:25,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:25,860 INFO L124 PetriNetUnfolderBase]: 606/995 cut-off events. [2024-06-03 20:33:25,860 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-03 20:33:25,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 995 events. 606/995 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4997 event pairs, 384 based on Foata normal form. 1/944 useless extension candidates. Maximal degree in co-relation 1998. Up to 941 conditions per place. [2024-06-03 20:33:25,878 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 20:33:25,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-03 20:33:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:33:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:33:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-03 20:33:25,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-03 20:33:25,889 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 82 transitions. [2024-06-03 20:33:25,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-03 20:33:25,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:25,893 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 20:33:25,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 20:33:25,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 20:33:25,897 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 20:33:25,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:25,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:25,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:25,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:33:25,898 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)] === [2024-06-03 20:33:25,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:25,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1093279874, now seen corresponding path program 1 times [2024-06-03 20:33:25,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:25,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200268689] [2024-06-03 20:33:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:25,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:26,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:26,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200268689] [2024-06-03 20:33:26,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200268689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:26,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:26,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:33:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038043172] [2024-06-03 20:33:26,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:33:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:33:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:33:26,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:26,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:26,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:26,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:26,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:26,400 INFO L124 PetriNetUnfolderBase]: 934/1510 cut-off events. [2024-06-03 20:33:26,401 INFO L125 PetriNetUnfolderBase]: For 300/348 co-relation queries the response was YES. [2024-06-03 20:33:26,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 1510 events. 934/1510 cut-off events. For 300/348 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7433 event pairs, 530 based on Foata normal form. 3/1483 useless extension candidates. Maximal degree in co-relation 3413. Up to 1399 conditions per place. [2024-06-03 20:33:26,411 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 20:33:26,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 254 flow [2024-06-03 20:33:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:33:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:33:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 20:33:26,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-03 20:33:26,413 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-03 20:33:26,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 254 flow [2024-06-03 20:33:26,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:26,415 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-03 20:33:26,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-03 20:33:26,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-03 20:33:26,440 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-03 20:33:26,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:26,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:26,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:26,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:33:26,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:26,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:26,442 INFO L85 PathProgramCache]: Analyzing trace with hash 468063438, now seen corresponding path program 1 times [2024-06-03 20:33:26,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:26,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097636665] [2024-06-03 20:33:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:26,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:26,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097636665] [2024-06-03 20:33:26,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097636665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:26,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:26,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269319514] [2024-06-03 20:33:26,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:26,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:26,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:26,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:26,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:26,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:26,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:26,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:26,775 INFO L124 PetriNetUnfolderBase]: 972/1588 cut-off events. [2024-06-03 20:33:26,775 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-06-03 20:33:26,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1588 events. 972/1588 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7840 event pairs, 304 based on Foata normal form. 7/1590 useless extension candidates. Maximal degree in co-relation 3986. Up to 1312 conditions per place. [2024-06-03 20:33:26,786 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-03 20:33:26,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 430 flow [2024-06-03 20:33:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-03 20:33:26,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-03 20:33:26,791 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 137 transitions. [2024-06-03 20:33:26,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 430 flow [2024-06-03 20:33:26,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 82 transitions, 428 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:26,795 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 278 flow [2024-06-03 20:33:26,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2024-06-03 20:33:26,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-03 20:33:26,797 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 278 flow [2024-06-03 20:33:26,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:26,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:26,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:26,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:33:26,798 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)] === [2024-06-03 20:33:26,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:26,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1162563891, now seen corresponding path program 1 times [2024-06-03 20:33:26,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:26,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856980195] [2024-06-03 20:33:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:26,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:27,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856980195] [2024-06-03 20:33:27,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856980195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:27,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:27,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:27,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175756931] [2024-06-03 20:33:27,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:27,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:27,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:27,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:27,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:27,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:27,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:27,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:27,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:27,276 INFO L124 PetriNetUnfolderBase]: 1054/1742 cut-off events. [2024-06-03 20:33:27,277 INFO L125 PetriNetUnfolderBase]: For 2375/2375 co-relation queries the response was YES. [2024-06-03 20:33:27,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5475 conditions, 1742 events. 1054/1742 cut-off events. For 2375/2375 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8953 event pairs, 197 based on Foata normal form. 26/1763 useless extension candidates. Maximal degree in co-relation 5452. Up to 1290 conditions per place. [2024-06-03 20:33:27,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 22 changer transitions 0/92 dead transitions. [2024-06-03 20:33:27,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 582 flow [2024-06-03 20:33:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 20:33:27,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-03 20:33:27,290 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 278 flow. Second operand 6 states and 160 transitions. [2024-06-03 20:33:27,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 582 flow [2024-06-03 20:33:27,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 572 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:27,296 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 339 flow [2024-06-03 20:33:27,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-03 20:33:27,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-03 20:33:27,297 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 339 flow [2024-06-03 20:33:27,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:27,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:27,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:27,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:33:27,298 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)] === [2024-06-03 20:33:27,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1976063819, now seen corresponding path program 1 times [2024-06-03 20:33:27,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:27,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730774543] [2024-06-03 20:33:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:27,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:27,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730774543] [2024-06-03 20:33:27,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730774543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:27,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:27,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:33:27,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65560518] [2024-06-03 20:33:27,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:27,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:33:27,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:27,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:33:27,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:33:27,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-03 20:33:27,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:27,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:27,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-03 20:33:27,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:27,655 INFO L124 PetriNetUnfolderBase]: 801/1436 cut-off events. [2024-06-03 20:33:27,656 INFO L125 PetriNetUnfolderBase]: For 2705/2739 co-relation queries the response was YES. [2024-06-03 20:33:27,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 1436 events. 801/1436 cut-off events. For 2705/2739 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7887 event pairs, 231 based on Foata normal form. 4/1396 useless extension candidates. Maximal degree in co-relation 4794. Up to 1191 conditions per place. [2024-06-03 20:33:27,665 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 48 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-03 20:33:27,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 511 flow [2024-06-03 20:33:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:33:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:33:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-03 20:33:27,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 20:33:27,666 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 339 flow. Second operand 4 states and 102 transitions. [2024-06-03 20:33:27,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 511 flow [2024-06-03 20:33:27,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 460 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:27,671 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 354 flow [2024-06-03 20:33:27,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-06-03 20:33:27,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-03 20:33:27,672 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 354 flow [2024-06-03 20:33:27,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:27,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:27,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:27,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:33:27,672 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)] === [2024-06-03 20:33:27,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1129415895, now seen corresponding path program 1 times [2024-06-03 20:33:27,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:27,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984802125] [2024-06-03 20:33:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:27,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:27,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:27,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984802125] [2024-06-03 20:33:27,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984802125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:27,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:27,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:27,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142805675] [2024-06-03 20:33:27,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:27,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:27,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:27,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:27,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:27,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 354 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:27,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:27,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:27,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:28,149 INFO L124 PetriNetUnfolderBase]: 1050/1744 cut-off events. [2024-06-03 20:33:28,150 INFO L125 PetriNetUnfolderBase]: For 4014/4018 co-relation queries the response was YES. [2024-06-03 20:33:28,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 conditions, 1744 events. 1050/1744 cut-off events. For 4014/4018 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9097 event pairs, 307 based on Foata normal form. 7/1746 useless extension candidates. Maximal degree in co-relation 6070. Up to 1463 conditions per place. [2024-06-03 20:33:28,160 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 24 changer transitions 0/86 dead transitions. [2024-06-03 20:33:28,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 641 flow [2024-06-03 20:33:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-03 20:33:28,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-03 20:33:28,161 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 354 flow. Second operand 5 states and 129 transitions. [2024-06-03 20:33:28,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 641 flow [2024-06-03 20:33:28,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 608 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:28,167 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 436 flow [2024-06-03 20:33:28,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2024-06-03 20:33:28,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-03 20:33:28,170 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 436 flow [2024-06-03 20:33:28,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:28,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:28,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:28,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:33:28,170 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)] === [2024-06-03 20:33:28,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:28,171 INFO L85 PathProgramCache]: Analyzing trace with hash 460366480, now seen corresponding path program 1 times [2024-06-03 20:33:28,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:28,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231682548] [2024-06-03 20:33:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:28,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:28,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231682548] [2024-06-03 20:33:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231682548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:28,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:28,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:28,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427912535] [2024-06-03 20:33:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:28,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:28,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:28,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:28,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:28,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:28,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:28,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:28,586 INFO L124 PetriNetUnfolderBase]: 1053/1744 cut-off events. [2024-06-03 20:33:28,587 INFO L125 PetriNetUnfolderBase]: For 4867/4867 co-relation queries the response was YES. [2024-06-03 20:33:28,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6525 conditions, 1744 events. 1053/1744 cut-off events. For 4867/4867 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8983 event pairs, 333 based on Foata normal form. 4/1744 useless extension candidates. Maximal degree in co-relation 6496. Up to 1457 conditions per place. [2024-06-03 20:33:28,599 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 60 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-03 20:33:28,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 741 flow [2024-06-03 20:33:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-03 20:33:28,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-03 20:33:28,601 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 436 flow. Second operand 5 states and 131 transitions. [2024-06-03 20:33:28,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 741 flow [2024-06-03 20:33:28,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 708 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:28,607 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 498 flow [2024-06-03 20:33:28,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-03 20:33:28,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-03 20:33:28,608 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 498 flow [2024-06-03 20:33:28,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:28,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:28,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:28,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:33:28,609 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)] === [2024-06-03 20:33:28,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:28,609 INFO L85 PathProgramCache]: Analyzing trace with hash -621774892, now seen corresponding path program 2 times [2024-06-03 20:33:28,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:28,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406044793] [2024-06-03 20:33:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:28,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:28,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:28,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406044793] [2024-06-03 20:33:28,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406044793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:28,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:28,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:28,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657646244] [2024-06-03 20:33:28,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:28,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:28,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:28,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:28,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:28,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:28,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:28,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:29,001 INFO L124 PetriNetUnfolderBase]: 1018/1669 cut-off events. [2024-06-03 20:33:29,002 INFO L125 PetriNetUnfolderBase]: For 5980/5984 co-relation queries the response was YES. [2024-06-03 20:33:29,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 1669 events. 1018/1669 cut-off events. For 5980/5984 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8425 event pairs, 335 based on Foata normal form. 5/1669 useless extension candidates. Maximal degree in co-relation 6376. Up to 1406 conditions per place. [2024-06-03 20:33:29,013 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 26 changer transitions 0/87 dead transitions. [2024-06-03 20:33:29,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 730 flow [2024-06-03 20:33:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:33:29,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-03 20:33:29,016 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 498 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:33:29,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 730 flow [2024-06-03 20:33:29,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 694 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:29,023 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 524 flow [2024-06-03 20:33:29,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-03 20:33:29,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-03 20:33:29,024 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 524 flow [2024-06-03 20:33:29,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:29,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:29,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:29,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:33:29,025 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)] === [2024-06-03 20:33:29,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1258070056, now seen corresponding path program 1 times [2024-06-03 20:33:29,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:29,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517002341] [2024-06-03 20:33:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:29,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:29,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:29,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517002341] [2024-06-03 20:33:29,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517002341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:29,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:29,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:29,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338801629] [2024-06-03 20:33:29,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:29,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:29,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:29,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:29,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:29,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:29,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:29,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:29,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:29,491 INFO L124 PetriNetUnfolderBase]: 1085/1784 cut-off events. [2024-06-03 20:33:29,491 INFO L125 PetriNetUnfolderBase]: For 7663/7667 co-relation queries the response was YES. [2024-06-03 20:33:29,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6863 conditions, 1784 events. 1085/1784 cut-off events. For 7663/7667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9179 event pairs, 299 based on Foata normal form. 25/1804 useless extension candidates. Maximal degree in co-relation 6831. Up to 1391 conditions per place. [2024-06-03 20:33:29,502 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 30 changer transitions 0/98 dead transitions. [2024-06-03 20:33:29,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 826 flow [2024-06-03 20:33:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:33:29,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-03 20:33:29,504 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 524 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:33:29,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 826 flow [2024-06-03 20:33:29,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 764 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:29,511 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 559 flow [2024-06-03 20:33:29,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=559, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-03 20:33:29,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-03 20:33:29,512 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 559 flow [2024-06-03 20:33:29,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:29,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:29,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:29,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:33:29,513 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)] === [2024-06-03 20:33:29,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash 61996686, now seen corresponding path program 1 times [2024-06-03 20:33:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:29,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442984487] [2024-06-03 20:33:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:29,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:29,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:29,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442984487] [2024-06-03 20:33:29,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442984487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:29,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:29,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:29,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899655052] [2024-06-03 20:33:29,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:29,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:29,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:29,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:29,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:29,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:29,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 559 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:29,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:29,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:29,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:29,948 INFO L124 PetriNetUnfolderBase]: 1096/1816 cut-off events. [2024-06-03 20:33:29,948 INFO L125 PetriNetUnfolderBase]: For 8047/8049 co-relation queries the response was YES. [2024-06-03 20:33:29,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 1816 events. 1096/1816 cut-off events. For 8047/8049 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9459 event pairs, 320 based on Foata normal form. 4/1819 useless extension candidates. Maximal degree in co-relation 7271. Up to 1531 conditions per place. [2024-06-03 20:33:29,960 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2024-06-03 20:33:29,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 869 flow [2024-06-03 20:33:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 20:33:29,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:33:29,962 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 559 flow. Second operand 6 states and 147 transitions. [2024-06-03 20:33:29,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 869 flow [2024-06-03 20:33:29,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 794 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:29,974 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 574 flow [2024-06-03 20:33:29,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=574, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-03 20:33:29,974 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-03 20:33:29,975 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 574 flow [2024-06-03 20:33:29,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:29,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:29,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:29,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:33:29,975 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)] === [2024-06-03 20:33:29,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:29,976 INFO L85 PathProgramCache]: Analyzing trace with hash -204673278, now seen corresponding path program 2 times [2024-06-03 20:33:29,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:29,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790751867] [2024-06-03 20:33:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:29,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:30,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:30,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790751867] [2024-06-03 20:33:30,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790751867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:30,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:30,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:30,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894260413] [2024-06-03 20:33:30,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:30,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:30,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:30,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:30,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 574 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:30,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:30,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:30,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:30,362 INFO L124 PetriNetUnfolderBase]: 1091/1803 cut-off events. [2024-06-03 20:33:30,362 INFO L125 PetriNetUnfolderBase]: For 9435/9441 co-relation queries the response was YES. [2024-06-03 20:33:30,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7263 conditions, 1803 events. 1091/1803 cut-off events. For 9435/9441 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9377 event pairs, 350 based on Foata normal form. 8/1809 useless extension candidates. Maximal degree in co-relation 7229. Up to 1526 conditions per place. [2024-06-03 20:33:30,374 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-03 20:33:30,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 796 flow [2024-06-03 20:33:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-03 20:33:30,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:33:30,375 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 574 flow. Second operand 5 states and 125 transitions. [2024-06-03 20:33:30,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 796 flow [2024-06-03 20:33:30,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 734 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:30,384 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 572 flow [2024-06-03 20:33:30,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=572, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-03 20:33:30,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-03 20:33:30,385 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 572 flow [2024-06-03 20:33:30,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:30,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:30,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:30,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:33:30,386 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)] === [2024-06-03 20:33:30,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1743591957, now seen corresponding path program 1 times [2024-06-03 20:33:30,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:30,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580648322] [2024-06-03 20:33:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:30,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:30,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:30,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580648322] [2024-06-03 20:33:30,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580648322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:30,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:30,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:30,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409394810] [2024-06-03 20:33:30,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:30,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:30,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:30,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:30,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:30,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 572 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:30,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:30,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:30,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:30,917 INFO L124 PetriNetUnfolderBase]: 1194/1966 cut-off events. [2024-06-03 20:33:30,917 INFO L125 PetriNetUnfolderBase]: For 11565/11565 co-relation queries the response was YES. [2024-06-03 20:33:30,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8091 conditions, 1966 events. 1194/1966 cut-off events. For 11565/11565 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10355 event pairs, 259 based on Foata normal form. 4/1965 useless extension candidates. Maximal degree in co-relation 8057. Up to 1385 conditions per place. [2024-06-03 20:33:30,929 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 33 changer transitions 0/110 dead transitions. [2024-06-03 20:33:30,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 944 flow [2024-06-03 20:33:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 20:33:30,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 20:33:30,931 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 572 flow. Second operand 6 states and 153 transitions. [2024-06-03 20:33:30,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 944 flow [2024-06-03 20:33:30,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 866 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:30,944 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 607 flow [2024-06-03 20:33:30,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=607, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-03 20:33:30,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-03 20:33:30,945 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 607 flow [2024-06-03 20:33:30,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:30,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:30,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:30,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:33:30,946 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)] === [2024-06-03 20:33:30,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:30,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2129767445, now seen corresponding path program 2 times [2024-06-03 20:33:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:30,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388035372] [2024-06-03 20:33:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:30,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:31,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:31,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388035372] [2024-06-03 20:33:31,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388035372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:31,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:31,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:31,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402343651] [2024-06-03 20:33:31,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:31,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:31,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:31,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:31,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:31,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:31,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:31,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:31,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:31,449 INFO L124 PetriNetUnfolderBase]: 1186/1954 cut-off events. [2024-06-03 20:33:31,449 INFO L125 PetriNetUnfolderBase]: For 12988/12988 co-relation queries the response was YES. [2024-06-03 20:33:31,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8287 conditions, 1954 events. 1186/1954 cut-off events. For 12988/12988 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10277 event pairs, 343 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 8253. Up to 1665 conditions per place. [2024-06-03 20:33:31,460 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 31 changer transitions 0/104 dead transitions. [2024-06-03 20:33:31,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 871 flow [2024-06-03 20:33:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 20:33:31,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:33:31,462 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 607 flow. Second operand 6 states and 147 transitions. [2024-06-03 20:33:31,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 871 flow [2024-06-03 20:33:31,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 825 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:31,482 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 642 flow [2024-06-03 20:33:31,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=642, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-03 20:33:31,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-03 20:33:31,483 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 642 flow [2024-06-03 20:33:31,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:31,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:31,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:31,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:33:31,484 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:31,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash -847834086, now seen corresponding path program 1 times [2024-06-03 20:33:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:31,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571335766] [2024-06-03 20:33:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:31,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:31,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:31,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571335766] [2024-06-03 20:33:31,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571335766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:31,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:31,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:31,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726751357] [2024-06-03 20:33:31,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:31,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:31,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:31,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:31,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:31,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:31,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 642 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:31,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:31,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:31,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:31,973 INFO L124 PetriNetUnfolderBase]: 1191/1970 cut-off events. [2024-06-03 20:33:31,973 INFO L125 PetriNetUnfolderBase]: For 14252/14252 co-relation queries the response was YES. [2024-06-03 20:33:31,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8578 conditions, 1970 events. 1191/1970 cut-off events. For 14252/14252 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10375 event pairs, 319 based on Foata normal form. 1/1970 useless extension candidates. Maximal degree in co-relation 8542. Up to 1813 conditions per place. [2024-06-03 20:33:31,987 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 85 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2024-06-03 20:33:31,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 106 transitions, 968 flow [2024-06-03 20:33:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 20:33:31,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-03 20:33:31,989 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 642 flow. Second operand 5 states and 118 transitions. [2024-06-03 20:33:31,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 106 transitions, 968 flow [2024-06-03 20:33:32,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 895 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:32,004 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 681 flow [2024-06-03 20:33:32,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=681, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-03 20:33:32,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-03 20:33:32,005 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 681 flow [2024-06-03 20:33:32,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:32,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:32,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:32,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:33:32,006 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:32,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2110953095, now seen corresponding path program 1 times [2024-06-03 20:33:32,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:32,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965788537] [2024-06-03 20:33:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:32,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:32,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:32,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965788537] [2024-06-03 20:33:32,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965788537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:32,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:32,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:32,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988038459] [2024-06-03 20:33:32,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:32,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:32,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:32,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:32,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 681 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:32,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:32,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:32,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:32,475 INFO L124 PetriNetUnfolderBase]: 1183/1943 cut-off events. [2024-06-03 20:33:32,476 INFO L125 PetriNetUnfolderBase]: For 16220/16226 co-relation queries the response was YES. [2024-06-03 20:33:32,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 1943 events. 1183/1943 cut-off events. For 16220/16226 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10181 event pairs, 337 based on Foata normal form. 6/1944 useless extension candidates. Maximal degree in co-relation 8598. Up to 1660 conditions per place. [2024-06-03 20:33:32,490 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 75 selfloop transitions, 31 changer transitions 0/112 dead transitions. [2024-06-03 20:33:32,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 967 flow [2024-06-03 20:33:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 20:33:32,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:33:32,492 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 681 flow. Second operand 6 states and 144 transitions. [2024-06-03 20:33:32,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 967 flow [2024-06-03 20:33:32,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 947 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:32,514 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 758 flow [2024-06-03 20:33:32,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=758, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2024-06-03 20:33:32,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-03 20:33:32,515 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 758 flow [2024-06-03 20:33:32,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:32,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:32,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:32,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:33:32,516 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)] === [2024-06-03 20:33:32,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1877589729, now seen corresponding path program 2 times [2024-06-03 20:33:32,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:32,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651651927] [2024-06-03 20:33:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:32,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:32,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651651927] [2024-06-03 20:33:32,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651651927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:32,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:32,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:32,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821301878] [2024-06-03 20:33:32,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:32,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:32,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:32,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:32,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:32,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:32,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 758 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:32,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:32,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:32,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:33,041 INFO L124 PetriNetUnfolderBase]: 1236/2049 cut-off events. [2024-06-03 20:33:33,041 INFO L125 PetriNetUnfolderBase]: For 19588/19594 co-relation queries the response was YES. [2024-06-03 20:33:33,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9396 conditions, 2049 events. 1236/2049 cut-off events. For 19588/19594 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10933 event pairs, 307 based on Foata normal form. 6/2050 useless extension candidates. Maximal degree in co-relation 9355. Up to 1487 conditions per place. [2024-06-03 20:33:33,055 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 35 changer transitions 0/121 dead transitions. [2024-06-03 20:33:33,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 1146 flow [2024-06-03 20:33:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:33:33,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:33:33,057 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 758 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:33:33,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 1146 flow [2024-06-03 20:33:33,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 121 transitions, 1069 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:33,078 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 796 flow [2024-06-03 20:33:33,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=796, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-03 20:33:33,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-03 20:33:33,079 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 796 flow [2024-06-03 20:33:33,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:33,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:33,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:33,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:33:33,080 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:33,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:33,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1912117452, now seen corresponding path program 2 times [2024-06-03 20:33:33,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:33,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122141692] [2024-06-03 20:33:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:33,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:33,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122141692] [2024-06-03 20:33:33,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122141692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:33,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:33,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:33,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876491766] [2024-06-03 20:33:33,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:33,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:33,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:33,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:33,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:33,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 796 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:33,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:33,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:33,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:33,562 INFO L124 PetriNetUnfolderBase]: 1238/2062 cut-off events. [2024-06-03 20:33:33,563 INFO L125 PetriNetUnfolderBase]: For 21446/21446 co-relation queries the response was YES. [2024-06-03 20:33:33,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9649 conditions, 2062 events. 1238/2062 cut-off events. For 21446/21446 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11080 event pairs, 341 based on Foata normal form. 2/2063 useless extension candidates. Maximal degree in co-relation 9607. Up to 1893 conditions per place. [2024-06-03 20:33:33,578 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-03 20:33:33,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 1078 flow [2024-06-03 20:33:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:33:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:33:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-03 20:33:33,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 20:33:33,580 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 796 flow. Second operand 4 states and 102 transitions. [2024-06-03 20:33:33,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 1078 flow [2024-06-03 20:33:33,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 1016 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:33,608 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 822 flow [2024-06-03 20:33:33,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=822, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-06-03 20:33:33,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-03 20:33:33,609 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 822 flow [2024-06-03 20:33:33,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:33,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:33,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:33,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:33:33,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:33,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:33,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1160031249, now seen corresponding path program 1 times [2024-06-03 20:33:33,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:33,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333858514] [2024-06-03 20:33:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:33,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:33,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:33,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333858514] [2024-06-03 20:33:33,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333858514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:33,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:33,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:33,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63303196] [2024-06-03 20:33:33,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:33,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:33,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:33,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:33,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:33,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:33,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 822 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:33,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:33,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:33,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:34,138 INFO L124 PetriNetUnfolderBase]: 1279/2130 cut-off events. [2024-06-03 20:33:34,138 INFO L125 PetriNetUnfolderBase]: For 25473/25481 co-relation queries the response was YES. [2024-06-03 20:33:34,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 2130 events. 1279/2130 cut-off events. For 25473/25481 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11604 event pairs, 286 based on Foata normal form. 15/2142 useless extension candidates. Maximal degree in co-relation 10076. Up to 1066 conditions per place. [2024-06-03 20:33:34,153 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 32 changer transitions 0/124 dead transitions. [2024-06-03 20:33:34,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1168 flow [2024-06-03 20:33:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 20:33:34,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:33:34,154 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 822 flow. Second operand 6 states and 144 transitions. [2024-06-03 20:33:34,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1168 flow [2024-06-03 20:33:34,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 124 transitions, 1128 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:34,178 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 864 flow [2024-06-03 20:33:34,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=864, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-06-03 20:33:34,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-03 20:33:34,178 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 864 flow [2024-06-03 20:33:34,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:34,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:34,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:34,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:33:34,179 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)] === [2024-06-03 20:33:34,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash 905879701, now seen corresponding path program 2 times [2024-06-03 20:33:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:34,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772693562] [2024-06-03 20:33:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:34,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:34,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772693562] [2024-06-03 20:33:34,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772693562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:34,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:34,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:34,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215710767] [2024-06-03 20:33:34,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:34,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:34,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:34,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:34,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:34,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:34,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 864 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:33:34,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:34,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:34,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:34,733 INFO L124 PetriNetUnfolderBase]: 1259/2099 cut-off events. [2024-06-03 20:33:34,734 INFO L125 PetriNetUnfolderBase]: For 25781/25781 co-relation queries the response was YES. [2024-06-03 20:33:34,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10164 conditions, 2099 events. 1259/2099 cut-off events. For 25781/25781 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11365 event pairs, 270 based on Foata normal form. 12/2108 useless extension candidates. Maximal degree in co-relation 10119. Up to 1555 conditions per place. [2024-06-03 20:33:34,756 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 41 changer transitions 0/136 dead transitions. [2024-06-03 20:33:34,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 136 transitions, 1220 flow [2024-06-03 20:33:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:33:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:33:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:33:34,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-03 20:33:34,759 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 864 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:33:34,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 136 transitions, 1220 flow [2024-06-03 20:33:34,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1167 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:34,813 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 899 flow [2024-06-03 20:33:34,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-06-03 20:33:34,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-03 20:33:34,814 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 899 flow [2024-06-03 20:33:34,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:33:34,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:34,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:34,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:33:34,815 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:34,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1372918710, now seen corresponding path program 1 times [2024-06-03 20:33:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:34,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549613288] [2024-06-03 20:33:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:35,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549613288] [2024-06-03 20:33:35,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549613288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:35,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:35,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:35,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682176999] [2024-06-03 20:33:35,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:35,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:35,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:35,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:35,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:35,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:35,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 899 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) [2024-06-03 20:33:35,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:35,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:35,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:35,340 INFO L124 PetriNetUnfolderBase]: 1298/2172 cut-off events. [2024-06-03 20:33:35,340 INFO L125 PetriNetUnfolderBase]: For 28140/28140 co-relation queries the response was YES. [2024-06-03 20:33:35,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10614 conditions, 2172 events. 1298/2172 cut-off events. For 28140/28140 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11916 event pairs, 357 based on Foata normal form. 3/2170 useless extension candidates. Maximal degree in co-relation 10568. Up to 1766 conditions per place. [2024-06-03 20:33:35,359 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 48 changer transitions 0/146 dead transitions. [2024-06-03 20:33:35,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 146 transitions, 1525 flow [2024-06-03 20:33:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 20:33:35,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-03 20:33:35,361 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 899 flow. Second operand 6 states and 155 transitions. [2024-06-03 20:33:35,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 146 transitions, 1525 flow [2024-06-03 20:33:35,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 146 transitions, 1426 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:33:35,394 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 1114 flow [2024-06-03 20:33:35,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1114, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2024-06-03 20:33:35,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-03 20:33:35,395 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 1114 flow [2024-06-03 20:33:35,395 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) [2024-06-03 20:33:35,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:35,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:35,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:33:35,396 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)] === [2024-06-03 20:33:35,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash 877340899, now seen corresponding path program 3 times [2024-06-03 20:33:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:35,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89610349] [2024-06-03 20:33:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:35,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:35,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:35,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89610349] [2024-06-03 20:33:35,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89610349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:35,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:35,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:35,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245557724] [2024-06-03 20:33:35,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:35,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:35,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:35,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:35,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 1114 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:35,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:35,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:35,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:35,901 INFO L124 PetriNetUnfolderBase]: 1400/2370 cut-off events. [2024-06-03 20:33:35,902 INFO L125 PetriNetUnfolderBase]: For 36100/36110 co-relation queries the response was YES. [2024-06-03 20:33:35,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12134 conditions, 2370 events. 1400/2370 cut-off events. For 36100/36110 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13430 event pairs, 318 based on Foata normal form. 22/2390 useless extension candidates. Maximal degree in co-relation 12085. Up to 1692 conditions per place. [2024-06-03 20:33:35,920 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 116 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-03 20:33:35,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 152 transitions, 1592 flow [2024-06-03 20:33:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 20:33:35,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-03 20:33:35,922 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 1114 flow. Second operand 6 states and 152 transitions. [2024-06-03 20:33:35,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 152 transitions, 1592 flow [2024-06-03 20:33:35,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 1554 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:35,965 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 1170 flow [2024-06-03 20:33:35,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1170, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2024-06-03 20:33:35,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-03 20:33:35,966 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 1170 flow [2024-06-03 20:33:35,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:35,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:35,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:35,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:33:35,967 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:35,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1551691187, now seen corresponding path program 4 times [2024-06-03 20:33:35,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:35,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189000095] [2024-06-03 20:33:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:36,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:36,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189000095] [2024-06-03 20:33:36,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189000095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:36,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:36,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:36,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604188045] [2024-06-03 20:33:36,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:36,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:36,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:36,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:36,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:36,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 1170 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:33:36,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:36,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:36,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:36,525 INFO L124 PetriNetUnfolderBase]: 1458/2457 cut-off events. [2024-06-03 20:33:36,526 INFO L125 PetriNetUnfolderBase]: For 40244/40244 co-relation queries the response was YES. [2024-06-03 20:33:36,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12760 conditions, 2457 events. 1458/2457 cut-off events. For 40244/40244 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14011 event pairs, 400 based on Foata normal form. 16/2469 useless extension candidates. Maximal degree in co-relation 12708. Up to 2045 conditions per place. [2024-06-03 20:33:36,547 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 32 changer transitions 0/159 dead transitions. [2024-06-03 20:33:36,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 1591 flow [2024-06-03 20:33:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:33:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:33:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 20:33:36,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-03 20:33:36,549 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 1170 flow. Second operand 8 states and 193 transitions. [2024-06-03 20:33:36,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 1591 flow [2024-06-03 20:33:36,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 1549 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:36,598 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1216 flow [2024-06-03 20:33:36,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1216, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-03 20:33:36,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-03 20:33:36,599 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1216 flow [2024-06-03 20:33:36,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:33:36,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:36,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:36,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:33:36,599 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)] === [2024-06-03 20:33:36,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1473306879, now seen corresponding path program 5 times [2024-06-03 20:33:36,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:36,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881027798] [2024-06-03 20:33:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:36,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:36,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881027798] [2024-06-03 20:33:36,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881027798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:36,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:36,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:36,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903975915] [2024-06-03 20:33:36,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:36,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:36,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:36,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:36,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:36,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:36,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1216 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:36,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:36,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:36,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:37,089 INFO L124 PetriNetUnfolderBase]: 1430/2422 cut-off events. [2024-06-03 20:33:37,089 INFO L125 PetriNetUnfolderBase]: For 40355/40365 co-relation queries the response was YES. [2024-06-03 20:33:37,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12538 conditions, 2422 events. 1430/2422 cut-off events. For 40355/40365 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13829 event pairs, 410 based on Foata normal form. 21/2441 useless extension candidates. Maximal degree in co-relation 12484. Up to 2001 conditions per place. [2024-06-03 20:33:37,109 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 27 changer transitions 0/145 dead transitions. [2024-06-03 20:33:37,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 145 transitions, 1558 flow [2024-06-03 20:33:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 20:33:37,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:33:37,112 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1216 flow. Second operand 6 states and 144 transitions. [2024-06-03 20:33:37,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 145 transitions, 1558 flow [2024-06-03 20:33:37,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 145 transitions, 1489 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:33:37,156 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1208 flow [2024-06-03 20:33:37,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1208, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-03 20:33:37,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-03 20:33:37,157 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1208 flow [2024-06-03 20:33:37,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:37,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:37,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:37,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:33:37,157 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:37,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1546113605, now seen corresponding path program 1 times [2024-06-03 20:33:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:37,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151285112] [2024-06-03 20:33:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:37,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:37,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:37,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151285112] [2024-06-03 20:33:37,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151285112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:37,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:37,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:37,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259004746] [2024-06-03 20:33:37,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:37,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:37,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:37,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:37,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1208 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:33:37,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:37,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:37,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:37,724 INFO L124 PetriNetUnfolderBase]: 1471/2501 cut-off events. [2024-06-03 20:33:37,725 INFO L125 PetriNetUnfolderBase]: For 41719/41721 co-relation queries the response was YES. [2024-06-03 20:33:37,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12841 conditions, 2501 events. 1471/2501 cut-off events. For 41719/41721 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14427 event pairs, 310 based on Foata normal form. 14/2514 useless extension candidates. Maximal degree in co-relation 12786. Up to 1783 conditions per place. [2024-06-03 20:33:37,742 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 117 selfloop transitions, 33 changer transitions 0/156 dead transitions. [2024-06-03 20:33:37,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 156 transitions, 1615 flow [2024-06-03 20:33:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:33:37,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:33:37,744 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1208 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:33:37,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 156 transitions, 1615 flow [2024-06-03 20:33:37,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 156 transitions, 1547 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:37,802 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 1229 flow [2024-06-03 20:33:37,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1229, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2024-06-03 20:33:37,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-03 20:33:37,802 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 1229 flow [2024-06-03 20:33:37,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:33:37,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:37,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:37,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:33:37,803 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)] === [2024-06-03 20:33:37,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:37,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1373217612, now seen corresponding path program 1 times [2024-06-03 20:33:37,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:37,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751414390] [2024-06-03 20:33:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:37,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:37,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751414390] [2024-06-03 20:33:37,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751414390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:37,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:37,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:37,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284022291] [2024-06-03 20:33:37,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:37,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:37,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:38,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:38,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 1229 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) [2024-06-03 20:33:38,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:38,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:38,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:38,295 INFO L124 PetriNetUnfolderBase]: 1476/2509 cut-off events. [2024-06-03 20:33:38,295 INFO L125 PetriNetUnfolderBase]: For 41928/41928 co-relation queries the response was YES. [2024-06-03 20:33:38,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13046 conditions, 2509 events. 1476/2509 cut-off events. For 41928/41928 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14485 event pairs, 384 based on Foata normal form. 1/2509 useless extension candidates. Maximal degree in co-relation 12990. Up to 2282 conditions per place. [2024-06-03 20:33:38,312 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 115 selfloop transitions, 25 changer transitions 0/146 dead transitions. [2024-06-03 20:33:38,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 146 transitions, 1687 flow [2024-06-03 20:33:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:38,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 20:33:38,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 20:33:38,314 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 1229 flow. Second operand 6 states and 137 transitions. [2024-06-03 20:33:38,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 146 transitions, 1687 flow [2024-06-03 20:33:38,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 146 transitions, 1613 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:38,363 INFO L231 Difference]: Finished difference. Result has 116 places, 129 transitions, 1305 flow [2024-06-03 20:33:38,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1305, PETRI_PLACES=116, PETRI_TRANSITIONS=129} [2024-06-03 20:33:38,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-03 20:33:38,364 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 129 transitions, 1305 flow [2024-06-03 20:33:38,364 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) [2024-06-03 20:33:38,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:38,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:38,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:33:38,365 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)] === [2024-06-03 20:33:38,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:38,365 INFO L85 PathProgramCache]: Analyzing trace with hash -513052236, now seen corresponding path program 2 times [2024-06-03 20:33:38,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:38,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878311141] [2024-06-03 20:33:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:38,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:38,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:38,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878311141] [2024-06-03 20:33:38,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878311141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:38,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:38,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:38,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151620166] [2024-06-03 20:33:38,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:38,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:38,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:38,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:38,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:38,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 129 transitions, 1305 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) [2024-06-03 20:33:38,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:38,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:38,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:38,927 INFO L124 PetriNetUnfolderBase]: 1519/2568 cut-off events. [2024-06-03 20:33:38,928 INFO L125 PetriNetUnfolderBase]: For 46294/46294 co-relation queries the response was YES. [2024-06-03 20:33:38,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13508 conditions, 2568 events. 1519/2568 cut-off events. For 46294/46294 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14895 event pairs, 407 based on Foata normal form. 3/2566 useless extension candidates. Maximal degree in co-relation 13451. Up to 2106 conditions per place. [2024-06-03 20:33:38,945 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 53 changer transitions 0/160 dead transitions. [2024-06-03 20:33:38,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 160 transitions, 1939 flow [2024-06-03 20:33:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:33:38,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-03 20:33:38,947 INFO L175 Difference]: Start difference. First operand has 116 places, 129 transitions, 1305 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:33:38,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 160 transitions, 1939 flow [2024-06-03 20:33:39,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 160 transitions, 1889 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:39,004 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1492 flow [2024-06-03 20:33:39,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1492, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2024-06-03 20:33:39,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-03 20:33:39,005 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1492 flow [2024-06-03 20:33:39,006 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) [2024-06-03 20:33:39,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:39,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:39,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:33:39,006 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:39,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash 565118045, now seen corresponding path program 2 times [2024-06-03 20:33:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:39,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28117351] [2024-06-03 20:33:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:39,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:39,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:39,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28117351] [2024-06-03 20:33:39,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28117351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:39,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:39,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:39,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520280526] [2024-06-03 20:33:39,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:39,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:39,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:39,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1492 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:39,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:39,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:39,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:39,511 INFO L124 PetriNetUnfolderBase]: 1499/2536 cut-off events. [2024-06-03 20:33:39,512 INFO L125 PetriNetUnfolderBase]: For 49030/49030 co-relation queries the response was YES. [2024-06-03 20:33:39,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13551 conditions, 2536 events. 1499/2536 cut-off events. For 49030/49030 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14576 event pairs, 274 based on Foata normal form. 12/2543 useless extension candidates. Maximal degree in co-relation 13491. Up to 1931 conditions per place. [2024-06-03 20:33:39,563 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-03 20:33:39,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1898 flow [2024-06-03 20:33:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 20:33:39,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-03 20:33:39,565 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1492 flow. Second operand 6 states and 152 transitions. [2024-06-03 20:33:39,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1898 flow [2024-06-03 20:33:39,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 168 transitions, 1807 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:39,632 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1477 flow [2024-06-03 20:33:39,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1477, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-03 20:33:39,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-03 20:33:39,633 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1477 flow [2024-06-03 20:33:39,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:39,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:39,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:39,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:33:39,634 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:39,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:39,634 INFO L85 PathProgramCache]: Analyzing trace with hash 830815325, now seen corresponding path program 3 times [2024-06-03 20:33:39,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:39,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320094868] [2024-06-03 20:33:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:39,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:39,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:39,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320094868] [2024-06-03 20:33:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320094868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:39,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:39,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859827562] [2024-06-03 20:33:39,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:39,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:39,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:39,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:39,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1477 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:39,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:39,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:39,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:40,191 INFO L124 PetriNetUnfolderBase]: 1479/2514 cut-off events. [2024-06-03 20:33:40,192 INFO L125 PetriNetUnfolderBase]: For 49253/49261 co-relation queries the response was YES. [2024-06-03 20:33:40,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13213 conditions, 2514 events. 1479/2514 cut-off events. For 49253/49261 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14581 event pairs, 254 based on Foata normal form. 15/2526 useless extension candidates. Maximal degree in co-relation 13152. Up to 1219 conditions per place. [2024-06-03 20:33:40,210 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 36 changer transitions 0/162 dead transitions. [2024-06-03 20:33:40,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 162 transitions, 1811 flow [2024-06-03 20:33:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 20:33:40,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-03 20:33:40,212 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1477 flow. Second operand 6 states and 142 transitions. [2024-06-03 20:33:40,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 162 transitions, 1811 flow [2024-06-03 20:33:40,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 162 transitions, 1710 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:40,280 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 1406 flow [2024-06-03 20:33:40,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1406, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2024-06-03 20:33:40,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-03 20:33:40,281 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 1406 flow [2024-06-03 20:33:40,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:40,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:40,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:40,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:33:40,281 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:40,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:40,282 INFO L85 PathProgramCache]: Analyzing trace with hash -853900106, now seen corresponding path program 2 times [2024-06-03 20:33:40,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:40,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160193692] [2024-06-03 20:33:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:40,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:40,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:40,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160193692] [2024-06-03 20:33:40,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160193692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:40,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:40,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:40,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557052396] [2024-06-03 20:33:40,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:40,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:40,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:40,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:40,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 1406 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) [2024-06-03 20:33:40,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:40,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:40,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:40,807 INFO L124 PetriNetUnfolderBase]: 1476/2509 cut-off events. [2024-06-03 20:33:40,808 INFO L125 PetriNetUnfolderBase]: For 43889/43889 co-relation queries the response was YES. [2024-06-03 20:33:40,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13056 conditions, 2509 events. 1476/2509 cut-off events. For 43889/43889 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14515 event pairs, 358 based on Foata normal form. 1/2509 useless extension candidates. Maximal degree in co-relation 12994. Up to 2281 conditions per place. [2024-06-03 20:33:40,827 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 127 selfloop transitions, 20 changer transitions 0/153 dead transitions. [2024-06-03 20:33:40,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1738 flow [2024-06-03 20:33:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 20:33:40,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-03 20:33:40,828 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 1406 flow. Second operand 5 states and 118 transitions. [2024-06-03 20:33:40,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1738 flow [2024-06-03 20:33:40,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 153 transitions, 1568 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:33:40,882 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1282 flow [2024-06-03 20:33:40,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1282, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2024-06-03 20:33:40,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-03 20:33:40,883 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1282 flow [2024-06-03 20:33:40,883 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) [2024-06-03 20:33:40,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:40,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:40,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:33:40,883 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:40,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash 556194804, now seen corresponding path program 3 times [2024-06-03 20:33:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:40,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290308151] [2024-06-03 20:33:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:40,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:41,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:41,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290308151] [2024-06-03 20:33:41,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290308151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:41,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:41,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:41,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381882791] [2024-06-03 20:33:41,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:41,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:41,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:41,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:41,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:41,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1282 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) [2024-06-03 20:33:41,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:41,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:41,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:41,481 INFO L124 PetriNetUnfolderBase]: 1578/2677 cut-off events. [2024-06-03 20:33:41,481 INFO L125 PetriNetUnfolderBase]: For 50301/50303 co-relation queries the response was YES. [2024-06-03 20:33:41,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13502 conditions, 2677 events. 1578/2677 cut-off events. For 50301/50303 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15710 event pairs, 362 based on Foata normal form. 8/2684 useless extension candidates. Maximal degree in co-relation 13441. Up to 2191 conditions per place. [2024-06-03 20:33:41,498 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 68 changer transitions 0/191 dead transitions. [2024-06-03 20:33:41,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 2091 flow [2024-06-03 20:33:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-03 20:33:41,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-03 20:33:41,500 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1282 flow. Second operand 6 states and 158 transitions. [2024-06-03 20:33:41,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 2091 flow [2024-06-03 20:33:41,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 2025 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:41,559 INFO L231 Difference]: Finished difference. Result has 127 places, 162 transitions, 1705 flow [2024-06-03 20:33:41,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1705, PETRI_PLACES=127, PETRI_TRANSITIONS=162} [2024-06-03 20:33:41,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-03 20:33:41,560 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 162 transitions, 1705 flow [2024-06-03 20:33:41,560 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) [2024-06-03 20:33:41,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:41,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:41,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:33:41,560 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:41,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:41,561 INFO L85 PathProgramCache]: Analyzing trace with hash 26943536, now seen corresponding path program 1 times [2024-06-03 20:33:41,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:41,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118509097] [2024-06-03 20:33:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:41,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:41,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:41,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118509097] [2024-06-03 20:33:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118509097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:41,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925527596] [2024-06-03 20:33:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:41,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:41,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:41,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 162 transitions, 1705 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) [2024-06-03 20:33:41,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:41,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:41,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:42,107 INFO L124 PetriNetUnfolderBase]: 1601/2702 cut-off events. [2024-06-03 20:33:42,107 INFO L125 PetriNetUnfolderBase]: For 56763/56771 co-relation queries the response was YES. [2024-06-03 20:33:42,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14943 conditions, 2702 events. 1601/2702 cut-off events. For 56763/56771 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 15837 event pairs, 395 based on Foata normal form. 6/2703 useless extension candidates. Maximal degree in co-relation 14879. Up to 2191 conditions per place. [2024-06-03 20:33:42,128 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 111 selfloop transitions, 77 changer transitions 0/194 dead transitions. [2024-06-03 20:33:42,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 194 transitions, 2447 flow [2024-06-03 20:33:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:33:42,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-03 20:33:42,130 INFO L175 Difference]: Start difference. First operand has 127 places, 162 transitions, 1705 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:33:42,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 194 transitions, 2447 flow [2024-06-03 20:33:42,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 194 transitions, 2397 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:42,234 INFO L231 Difference]: Finished difference. Result has 133 places, 175 transitions, 2001 flow [2024-06-03 20:33:42,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2001, PETRI_PLACES=133, PETRI_TRANSITIONS=175} [2024-06-03 20:33:42,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-03 20:33:42,235 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 175 transitions, 2001 flow [2024-06-03 20:33:42,235 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) [2024-06-03 20:33:42,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:42,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:42,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:33:42,236 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:42,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash 484360834, now seen corresponding path program 2 times [2024-06-03 20:33:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:42,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875198500] [2024-06-03 20:33:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:42,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:42,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:42,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875198500] [2024-06-03 20:33:42,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875198500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:42,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:42,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:42,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098196304] [2024-06-03 20:33:42,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:42,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:42,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:42,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:42,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:42,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 2001 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) [2024-06-03 20:33:42,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:42,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:42,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:42,820 INFO L124 PetriNetUnfolderBase]: 1667/2819 cut-off events. [2024-06-03 20:33:42,820 INFO L125 PetriNetUnfolderBase]: For 63158/63158 co-relation queries the response was YES. [2024-06-03 20:33:42,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16434 conditions, 2819 events. 1667/2819 cut-off events. For 63158/63158 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16649 event pairs, 359 based on Foata normal form. 4/2822 useless extension candidates. Maximal degree in co-relation 16367. Up to 2518 conditions per place. [2024-06-03 20:33:42,843 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-03 20:33:42,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 212 transitions, 2840 flow [2024-06-03 20:33:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 20:33:42,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-03 20:33:42,845 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 2001 flow. Second operand 7 states and 155 transitions. [2024-06-03 20:33:42,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 212 transitions, 2840 flow [2024-06-03 20:33:42,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 212 transitions, 2744 flow, removed 48 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:42,944 INFO L231 Difference]: Finished difference. Result has 141 places, 196 transitions, 2360 flow [2024-06-03 20:33:42,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2360, PETRI_PLACES=141, PETRI_TRANSITIONS=196} [2024-06-03 20:33:42,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-03 20:33:42,945 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 196 transitions, 2360 flow [2024-06-03 20:33:42,946 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) [2024-06-03 20:33:42,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:42,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:42,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:33:42,946 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:42,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:42,946 INFO L85 PathProgramCache]: Analyzing trace with hash 226803790, now seen corresponding path program 3 times [2024-06-03 20:33:42,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:42,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822424106] [2024-06-03 20:33:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:42,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:43,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:43,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822424106] [2024-06-03 20:33:43,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822424106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:43,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:43,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:43,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371259522] [2024-06-03 20:33:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:43,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:43,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:43,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 196 transitions, 2360 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) [2024-06-03 20:33:43,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:43,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:43,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:43,550 INFO L124 PetriNetUnfolderBase]: 1665/2825 cut-off events. [2024-06-03 20:33:43,550 INFO L125 PetriNetUnfolderBase]: For 66019/66019 co-relation queries the response was YES. [2024-06-03 20:33:43,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16557 conditions, 2825 events. 1665/2825 cut-off events. For 66019/66019 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16710 event pairs, 354 based on Foata normal form. 6/2830 useless extension candidates. Maximal degree in co-relation 16486. Up to 2266 conditions per place. [2024-06-03 20:33:43,574 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 99 changer transitions 0/229 dead transitions. [2024-06-03 20:33:43,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 229 transitions, 3077 flow [2024-06-03 20:33:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:33:43,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-03 20:33:43,575 INFO L175 Difference]: Start difference. First operand has 141 places, 196 transitions, 2360 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:33:43,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 229 transitions, 3077 flow [2024-06-03 20:33:43,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 229 transitions, 2947 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:43,690 INFO L231 Difference]: Finished difference. Result has 145 places, 201 transitions, 2545 flow [2024-06-03 20:33:43,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2545, PETRI_PLACES=145, PETRI_TRANSITIONS=201} [2024-06-03 20:33:43,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-03 20:33:43,691 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 201 transitions, 2545 flow [2024-06-03 20:33:43,691 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) [2024-06-03 20:33:43,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:43,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:43,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:33:43,691 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:43,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash 199344424, now seen corresponding path program 1 times [2024-06-03 20:33:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:43,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733820050] [2024-06-03 20:33:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:43,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:43,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733820050] [2024-06-03 20:33:43,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733820050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:43,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:43,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:43,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468135860] [2024-06-03 20:33:43,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:43,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:43,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:43,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:43,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:43,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:43,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 201 transitions, 2545 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) [2024-06-03 20:33:43,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:43,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:43,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:44,264 INFO L124 PetriNetUnfolderBase]: 1660/2801 cut-off events. [2024-06-03 20:33:44,264 INFO L125 PetriNetUnfolderBase]: For 67797/67797 co-relation queries the response was YES. [2024-06-03 20:33:44,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16906 conditions, 2801 events. 1660/2801 cut-off events. For 67797/67797 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 16486 event pairs, 355 based on Foata normal form. 2/2802 useless extension candidates. Maximal degree in co-relation 16834. Up to 2557 conditions per place. [2024-06-03 20:33:44,284 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 196 selfloop transitions, 10 changer transitions 0/212 dead transitions. [2024-06-03 20:33:44,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 212 transitions, 3009 flow [2024-06-03 20:33:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:33:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:33:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-03 20:33:44,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:33:44,286 INFO L175 Difference]: Start difference. First operand has 145 places, 201 transitions, 2545 flow. Second operand 4 states and 93 transitions. [2024-06-03 20:33:44,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 212 transitions, 3009 flow [2024-06-03 20:33:44,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 212 transitions, 2831 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:44,416 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2426 flow [2024-06-03 20:33:44,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2426, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-03 20:33:44,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-03 20:33:44,417 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2426 flow [2024-06-03 20:33:44,417 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) [2024-06-03 20:33:44,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:44,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:44,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:33:44,418 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:44,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:44,418 INFO L85 PathProgramCache]: Analyzing trace with hash -389191924, now seen corresponding path program 1 times [2024-06-03 20:33:44,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:44,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921308994] [2024-06-03 20:33:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:44,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:44,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:44,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921308994] [2024-06-03 20:33:44,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921308994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:44,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:44,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862582384] [2024-06-03 20:33:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:44,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:44,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:44,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:44,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2426 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:44,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:44,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:44,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:44,995 INFO L124 PetriNetUnfolderBase]: 1699/2861 cut-off events. [2024-06-03 20:33:44,995 INFO L125 PetriNetUnfolderBase]: For 74314/74314 co-relation queries the response was YES. [2024-06-03 20:33:45,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17139 conditions, 2861 events. 1699/2861 cut-off events. For 74314/74314 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16929 event pairs, 389 based on Foata normal form. 3/2859 useless extension candidates. Maximal degree in co-relation 17066. Up to 2080 conditions per place. [2024-06-03 20:33:45,019 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 124 changer transitions 0/249 dead transitions. [2024-06-03 20:33:45,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 249 transitions, 3444 flow [2024-06-03 20:33:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:33:45,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-03 20:33:45,021 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2426 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:33:45,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 249 transitions, 3444 flow [2024-06-03 20:33:45,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 249 transitions, 3397 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:45,181 INFO L231 Difference]: Finished difference. Result has 152 places, 222 transitions, 3017 flow [2024-06-03 20:33:45,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3017, PETRI_PLACES=152, PETRI_TRANSITIONS=222} [2024-06-03 20:33:45,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-03 20:33:45,182 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 222 transitions, 3017 flow [2024-06-03 20:33:45,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:45,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:45,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:45,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:33:45,182 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)] === [2024-06-03 20:33:45,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:45,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1269540601, now seen corresponding path program 1 times [2024-06-03 20:33:45,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:45,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698111246] [2024-06-03 20:33:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:45,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:45,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:45,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698111246] [2024-06-03 20:33:45,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698111246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:45,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:45,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:45,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974582699] [2024-06-03 20:33:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:45,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:45,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 222 transitions, 3017 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) [2024-06-03 20:33:45,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:45,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:45,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:45,740 INFO L124 PetriNetUnfolderBase]: 1725/2893 cut-off events. [2024-06-03 20:33:45,741 INFO L125 PetriNetUnfolderBase]: For 83053/83053 co-relation queries the response was YES. [2024-06-03 20:33:45,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18977 conditions, 2893 events. 1725/2893 cut-off events. For 83053/83053 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17070 event pairs, 386 based on Foata normal form. 2/2890 useless extension candidates. Maximal degree in co-relation 18901. Up to 2320 conditions per place. [2024-06-03 20:33:45,767 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 91 changer transitions 0/254 dead transitions. [2024-06-03 20:33:45,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 254 transitions, 3972 flow [2024-06-03 20:33:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:45,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:33:45,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-03 20:33:45,768 INFO L175 Difference]: Start difference. First operand has 152 places, 222 transitions, 3017 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:33:45,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 254 transitions, 3972 flow [2024-06-03 20:33:45,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 3888 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:45,926 INFO L231 Difference]: Finished difference. Result has 158 places, 232 transitions, 3346 flow [2024-06-03 20:33:45,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3346, PETRI_PLACES=158, PETRI_TRANSITIONS=232} [2024-06-03 20:33:45,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-03 20:33:45,929 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 232 transitions, 3346 flow [2024-06-03 20:33:45,929 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) [2024-06-03 20:33:45,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:45,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:45,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:33:45,929 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)] === [2024-06-03 20:33:45,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:45,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1275254521, now seen corresponding path program 2 times [2024-06-03 20:33:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:45,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109371765] [2024-06-03 20:33:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:45,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:46,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:46,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109371765] [2024-06-03 20:33:46,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109371765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:46,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:46,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:46,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634831756] [2024-06-03 20:33:46,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:46,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:46,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:46,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:46,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 232 transitions, 3346 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) [2024-06-03 20:33:46,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:46,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:46,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:46,595 INFO L124 PetriNetUnfolderBase]: 1719/2884 cut-off events. [2024-06-03 20:33:46,596 INFO L125 PetriNetUnfolderBase]: For 84745/84745 co-relation queries the response was YES. [2024-06-03 20:33:46,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18838 conditions, 2884 events. 1719/2884 cut-off events. For 84745/84745 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17001 event pairs, 386 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 18758. Up to 2317 conditions per place. [2024-06-03 20:33:46,624 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 87 changer transitions 0/251 dead transitions. [2024-06-03 20:33:46,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 251 transitions, 4092 flow [2024-06-03 20:33:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 20:33:46,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:33:46,626 INFO L175 Difference]: Start difference. First operand has 158 places, 232 transitions, 3346 flow. Second operand 6 states and 147 transitions. [2024-06-03 20:33:46,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 251 transitions, 4092 flow [2024-06-03 20:33:46,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 251 transitions, 3965 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:46,780 INFO L231 Difference]: Finished difference. Result has 162 places, 232 transitions, 3402 flow [2024-06-03 20:33:46,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3402, PETRI_PLACES=162, PETRI_TRANSITIONS=232} [2024-06-03 20:33:46,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-03 20:33:46,781 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 232 transitions, 3402 flow [2024-06-03 20:33:46,781 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) [2024-06-03 20:33:46,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:46,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:46,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:33:46,782 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:46,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:46,782 INFO L85 PathProgramCache]: Analyzing trace with hash -379926334, now seen corresponding path program 2 times [2024-06-03 20:33:46,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:46,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015049542] [2024-06-03 20:33:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:46,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:46,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015049542] [2024-06-03 20:33:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015049542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:46,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:46,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:46,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85336219] [2024-06-03 20:33:46,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:46,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:47,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:47,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 232 transitions, 3402 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:47,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:47,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:47,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:47,387 INFO L124 PetriNetUnfolderBase]: 1786/2996 cut-off events. [2024-06-03 20:33:47,387 INFO L125 PetriNetUnfolderBase]: For 94612/94612 co-relation queries the response was YES. [2024-06-03 20:33:47,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 2996 events. 1786/2996 cut-off events. For 94612/94612 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17814 event pairs, 392 based on Foata normal form. 3/2994 useless extension candidates. Maximal degree in co-relation 19813. Up to 2136 conditions per place. [2024-06-03 20:33:47,414 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 134 selfloop transitions, 129 changer transitions 0/269 dead transitions. [2024-06-03 20:33:47,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 269 transitions, 4516 flow [2024-06-03 20:33:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:33:47,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:33:47,416 INFO L175 Difference]: Start difference. First operand has 162 places, 232 transitions, 3402 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:33:47,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 269 transitions, 4516 flow [2024-06-03 20:33:47,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 269 transitions, 4356 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:47,677 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 3740 flow [2024-06-03 20:33:47,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3242, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3740, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2024-06-03 20:33:47,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-03 20:33:47,678 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 3740 flow [2024-06-03 20:33:47,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:47,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:47,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:47,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:33:47,679 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:47,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1275250894, now seen corresponding path program 3 times [2024-06-03 20:33:47,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:47,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775763401] [2024-06-03 20:33:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:47,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:47,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:47,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775763401] [2024-06-03 20:33:47,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775763401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:47,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:47,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:47,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781695419] [2024-06-03 20:33:47,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:47,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:47,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:47,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:47,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 3740 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:47,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:47,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:47,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:48,262 INFO L124 PetriNetUnfolderBase]: 1781/2992 cut-off events. [2024-06-03 20:33:48,263 INFO L125 PetriNetUnfolderBase]: For 98313/98313 co-relation queries the response was YES. [2024-06-03 20:33:48,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20175 conditions, 2992 events. 1781/2992 cut-off events. For 98313/98313 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17823 event pairs, 393 based on Foata normal form. 3/2990 useless extension candidates. Maximal degree in co-relation 20092. Up to 2134 conditions per place. [2024-06-03 20:33:48,290 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 130 changer transitions 0/268 dead transitions. [2024-06-03 20:33:48,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 4581 flow [2024-06-03 20:33:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:33:48,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:33:48,292 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 3740 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:33:48,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 4581 flow [2024-06-03 20:33:48,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 268 transitions, 4325 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:48,497 INFO L231 Difference]: Finished difference. Result has 171 places, 247 transitions, 3775 flow [2024-06-03 20:33:48,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3775, PETRI_PLACES=171, PETRI_TRANSITIONS=247} [2024-06-03 20:33:48,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-03 20:33:48,498 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 247 transitions, 3775 flow [2024-06-03 20:33:48,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:48,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:48,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:48,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:33:48,498 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)] === [2024-06-03 20:33:48,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:48,499 INFO L85 PathProgramCache]: Analyzing trace with hash 827533781, now seen corresponding path program 3 times [2024-06-03 20:33:48,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:48,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819306122] [2024-06-03 20:33:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:48,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:48,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819306122] [2024-06-03 20:33:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819306122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:48,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:48,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941222632] [2024-06-03 20:33:48,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:48,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:48,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:48,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 247 transitions, 3775 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) [2024-06-03 20:33:48,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:48,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:48,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:49,089 INFO L124 PetriNetUnfolderBase]: 1767/2966 cut-off events. [2024-06-03 20:33:49,089 INFO L125 PetriNetUnfolderBase]: For 102161/102169 co-relation queries the response was YES. [2024-06-03 20:33:49,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19941 conditions, 2966 events. 1767/2966 cut-off events. For 102161/102169 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 17632 event pairs, 392 based on Foata normal form. 5/2966 useless extension candidates. Maximal degree in co-relation 19857. Up to 2390 conditions per place. [2024-06-03 20:33:49,115 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 93 changer transitions 0/266 dead transitions. [2024-06-03 20:33:49,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 266 transitions, 4569 flow [2024-06-03 20:33:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:33:49,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-03 20:33:49,117 INFO L175 Difference]: Start difference. First operand has 171 places, 247 transitions, 3775 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:33:49,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 266 transitions, 4569 flow [2024-06-03 20:33:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 4296 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:49,335 INFO L231 Difference]: Finished difference. Result has 173 places, 247 transitions, 3695 flow [2024-06-03 20:33:49,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3695, PETRI_PLACES=173, PETRI_TRANSITIONS=247} [2024-06-03 20:33:49,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-03 20:33:49,335 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 247 transitions, 3695 flow [2024-06-03 20:33:49,335 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) [2024-06-03 20:33:49,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:49,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:49,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:33:49,336 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)] === [2024-06-03 20:33:49,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2130276901, now seen corresponding path program 4 times [2024-06-03 20:33:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:49,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561198698] [2024-06-03 20:33:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:49,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:49,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:49,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561198698] [2024-06-03 20:33:49,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561198698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:49,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:49,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:49,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480111974] [2024-06-03 20:33:49,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:49,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:49,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:49,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 247 transitions, 3695 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) [2024-06-03 20:33:49,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:49,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:49,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:50,005 INFO L124 PetriNetUnfolderBase]: 1751/2950 cut-off events. [2024-06-03 20:33:50,006 INFO L125 PetriNetUnfolderBase]: For 100259/100259 co-relation queries the response was YES. [2024-06-03 20:33:50,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 2950 events. 1751/2950 cut-off events. For 100259/100259 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17529 event pairs, 351 based on Foata normal form. 4/2953 useless extension candidates. Maximal degree in co-relation 19401. Up to 2643 conditions per place. [2024-06-03 20:33:50,032 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 37 changer transitions 0/262 dead transitions. [2024-06-03 20:33:50,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 4251 flow [2024-06-03 20:33:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 20:33:50,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:33:50,033 INFO L175 Difference]: Start difference. First operand has 173 places, 247 transitions, 3695 flow. Second operand 7 states and 154 transitions. [2024-06-03 20:33:50,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 4251 flow [2024-06-03 20:33:50,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 262 transitions, 3899 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 20:33:50,259 INFO L231 Difference]: Finished difference. Result has 172 places, 247 transitions, 3432 flow [2024-06-03 20:33:50,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3432, PETRI_PLACES=172, PETRI_TRANSITIONS=247} [2024-06-03 20:33:50,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-03 20:33:50,259 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 247 transitions, 3432 flow [2024-06-03 20:33:50,260 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) [2024-06-03 20:33:50,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:50,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:50,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:33:50,260 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)] === [2024-06-03 20:33:50,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:50,260 INFO L85 PathProgramCache]: Analyzing trace with hash 745600613, now seen corresponding path program 5 times [2024-06-03 20:33:50,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:50,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149666519] [2024-06-03 20:33:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:50,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149666519] [2024-06-03 20:33:50,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149666519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:50,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:50,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970955752] [2024-06-03 20:33:50,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:50,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:50,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:50,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:50,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:50,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 247 transitions, 3432 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) [2024-06-03 20:33:50,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:50,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:50,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:50,875 INFO L124 PetriNetUnfolderBase]: 1743/2935 cut-off events. [2024-06-03 20:33:50,875 INFO L125 PetriNetUnfolderBase]: For 100115/100115 co-relation queries the response was YES. [2024-06-03 20:33:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18876 conditions, 2935 events. 1743/2935 cut-off events. For 100115/100115 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17394 event pairs, 351 based on Foata normal form. 4/2938 useless extension candidates. Maximal degree in co-relation 18792. Up to 2381 conditions per place. [2024-06-03 20:33:50,902 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 170 selfloop transitions, 102 changer transitions 0/278 dead transitions. [2024-06-03 20:33:50,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 278 transitions, 4276 flow [2024-06-03 20:33:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:33:50,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-03 20:33:50,903 INFO L175 Difference]: Start difference. First operand has 172 places, 247 transitions, 3432 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:33:50,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 278 transitions, 4276 flow [2024-06-03 20:33:51,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 278 transitions, 4202 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:33:51,108 INFO L231 Difference]: Finished difference. Result has 173 places, 250 transitions, 3666 flow [2024-06-03 20:33:51,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3666, PETRI_PLACES=173, PETRI_TRANSITIONS=250} [2024-06-03 20:33:51,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-03 20:33:51,109 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 250 transitions, 3666 flow [2024-06-03 20:33:51,109 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) [2024-06-03 20:33:51,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:51,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:51,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:33:51,110 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)] === [2024-06-03 20:33:51,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1871354679, now seen corresponding path program 6 times [2024-06-03 20:33:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:51,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621507015] [2024-06-03 20:33:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:51,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:51,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:51,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621507015] [2024-06-03 20:33:51,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621507015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:51,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:51,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335033518] [2024-06-03 20:33:51,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:51,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:51,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:51,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 250 transitions, 3666 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) [2024-06-03 20:33:51,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:51,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:51,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:51,718 INFO L124 PetriNetUnfolderBase]: 1719/2900 cut-off events. [2024-06-03 20:33:51,718 INFO L125 PetriNetUnfolderBase]: For 102423/102425 co-relation queries the response was YES. [2024-06-03 20:33:51,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18853 conditions, 2900 events. 1719/2900 cut-off events. For 102423/102425 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17227 event pairs, 358 based on Foata normal form. 6/2905 useless extension candidates. Maximal degree in co-relation 18768. Up to 2361 conditions per place. [2024-06-03 20:33:51,745 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 95 changer transitions 0/273 dead transitions. [2024-06-03 20:33:51,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 273 transitions, 4340 flow [2024-06-03 20:33:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 20:33:51,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 20:33:51,747 INFO L175 Difference]: Start difference. First operand has 173 places, 250 transitions, 3666 flow. Second operand 6 states and 153 transitions. [2024-06-03 20:33:51,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 273 transitions, 4340 flow [2024-06-03 20:33:51,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 273 transitions, 4112 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 20:33:51,990 INFO L231 Difference]: Finished difference. Result has 173 places, 250 transitions, 3652 flow [2024-06-03 20:33:51,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3652, PETRI_PLACES=173, PETRI_TRANSITIONS=250} [2024-06-03 20:33:51,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-03 20:33:51,991 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 250 transitions, 3652 flow [2024-06-03 20:33:51,991 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) [2024-06-03 20:33:51,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:51,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:51,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:33:51,992 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)] === [2024-06-03 20:33:51,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1871351052, now seen corresponding path program 4 times [2024-06-03 20:33:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:51,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902316290] [2024-06-03 20:33:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:51,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:52,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:52,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902316290] [2024-06-03 20:33:52,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902316290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:52,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:52,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:52,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594994241] [2024-06-03 20:33:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:52,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:52,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:52,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:52,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:52,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 250 transitions, 3652 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:52,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:52,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:52,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:52,610 INFO L124 PetriNetUnfolderBase]: 1774/2993 cut-off events. [2024-06-03 20:33:52,610 INFO L125 PetriNetUnfolderBase]: For 101639/101641 co-relation queries the response was YES. [2024-06-03 20:33:52,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19456 conditions, 2993 events. 1774/2993 cut-off events. For 101639/101641 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17885 event pairs, 358 based on Foata normal form. 5/2997 useless extension candidates. Maximal degree in co-relation 19372. Up to 2350 conditions per place. [2024-06-03 20:33:52,638 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 114 changer transitions 0/295 dead transitions. [2024-06-03 20:33:52,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 295 transitions, 4796 flow [2024-06-03 20:33:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 20:33:52,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-03 20:33:52,640 INFO L175 Difference]: Start difference. First operand has 173 places, 250 transitions, 3652 flow. Second operand 7 states and 178 transitions. [2024-06-03 20:33:52,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 295 transitions, 4796 flow [2024-06-03 20:33:52,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 295 transitions, 4506 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:33:52,854 INFO L231 Difference]: Finished difference. Result has 175 places, 265 transitions, 3962 flow [2024-06-03 20:33:52,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3962, PETRI_PLACES=175, PETRI_TRANSITIONS=265} [2024-06-03 20:33:52,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-03 20:33:52,855 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 265 transitions, 3962 flow [2024-06-03 20:33:52,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:52,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:52,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:52,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:33:52,856 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)] === [2024-06-03 20:33:52,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1871362212, now seen corresponding path program 5 times [2024-06-03 20:33:52,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:52,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961947813] [2024-06-03 20:33:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:52,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:53,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961947813] [2024-06-03 20:33:53,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961947813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:53,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:53,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:53,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525484719] [2024-06-03 20:33:53,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:53,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:53,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:53,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 265 transitions, 3962 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:53,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:53,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:53,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:53,529 INFO L124 PetriNetUnfolderBase]: 1785/3014 cut-off events. [2024-06-03 20:33:53,529 INFO L125 PetriNetUnfolderBase]: For 101884/101886 co-relation queries the response was YES. [2024-06-03 20:33:53,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19928 conditions, 3014 events. 1785/3014 cut-off events. For 101884/101886 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18078 event pairs, 358 based on Foata normal form. 5/3018 useless extension candidates. Maximal degree in co-relation 19842. Up to 2363 conditions per place. [2024-06-03 20:33:53,552 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 181 selfloop transitions, 108 changer transitions 0/295 dead transitions. [2024-06-03 20:33:53,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 295 transitions, 4973 flow [2024-06-03 20:33:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:33:53,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:33:53,554 INFO L175 Difference]: Start difference. First operand has 175 places, 265 transitions, 3962 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:33:53,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 295 transitions, 4973 flow [2024-06-03 20:33:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 295 transitions, 4902 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:53,772 INFO L231 Difference]: Finished difference. Result has 182 places, 271 transitions, 4246 flow [2024-06-03 20:33:53,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3893, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4246, PETRI_PLACES=182, PETRI_TRANSITIONS=271} [2024-06-03 20:33:53,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-03 20:33:53,773 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 271 transitions, 4246 flow [2024-06-03 20:33:53,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:53,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:53,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:53,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:33:53,774 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)] === [2024-06-03 20:33:53,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 835250642, now seen corresponding path program 1 times [2024-06-03 20:33:53,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:53,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62402890] [2024-06-03 20:33:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:53,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:53,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:53,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62402890] [2024-06-03 20:33:53,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62402890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:53,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:53,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:53,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974287441] [2024-06-03 20:33:53,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:53,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:53,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:53,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:53,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:53,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:53,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 271 transitions, 4246 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:53,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:53,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:53,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:54,392 INFO L124 PetriNetUnfolderBase]: 1808/3029 cut-off events. [2024-06-03 20:33:54,392 INFO L125 PetriNetUnfolderBase]: For 112099/112107 co-relation queries the response was YES. [2024-06-03 20:33:54,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20738 conditions, 3029 events. 1808/3029 cut-off events. For 112099/112107 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18049 event pairs, 415 based on Foata normal form. 6/3030 useless extension candidates. Maximal degree in co-relation 20649. Up to 2186 conditions per place. [2024-06-03 20:33:54,421 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 118 selfloop transitions, 178 changer transitions 0/302 dead transitions. [2024-06-03 20:33:54,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 302 transitions, 5322 flow [2024-06-03 20:33:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:33:54,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:33:54,423 INFO L175 Difference]: Start difference. First operand has 182 places, 271 transitions, 4246 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:33:54,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 302 transitions, 5322 flow [2024-06-03 20:33:54,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 302 transitions, 5100 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:54,669 INFO L231 Difference]: Finished difference. Result has 186 places, 282 transitions, 4580 flow [2024-06-03 20:33:54,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4580, PETRI_PLACES=186, PETRI_TRANSITIONS=282} [2024-06-03 20:33:54,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-03 20:33:54,670 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 282 transitions, 4580 flow [2024-06-03 20:33:54,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:54,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:54,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:54,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:33:54,670 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)] === [2024-06-03 20:33:54,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:54,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2130284992, now seen corresponding path program 2 times [2024-06-03 20:33:54,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:54,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243236828] [2024-06-03 20:33:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:54,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:54,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:54,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243236828] [2024-06-03 20:33:54,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243236828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:54,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:54,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:54,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384719695] [2024-06-03 20:33:54,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:54,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:54,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:54,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:54,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 282 transitions, 4580 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:54,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:54,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:54,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:55,358 INFO L124 PetriNetUnfolderBase]: 1850/3120 cut-off events. [2024-06-03 20:33:55,359 INFO L125 PetriNetUnfolderBase]: For 118025/118025 co-relation queries the response was YES. [2024-06-03 20:33:55,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21877 conditions, 3120 events. 1850/3120 cut-off events. For 118025/118025 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 18791 event pairs, 351 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 21787. Up to 2757 conditions per place. [2024-06-03 20:33:55,389 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 50 changer transitions 0/314 dead transitions. [2024-06-03 20:33:55,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 314 transitions, 5730 flow [2024-06-03 20:33:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:33:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:33:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 20:33:55,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 20:33:55,391 INFO L175 Difference]: Start difference. First operand has 186 places, 282 transitions, 4580 flow. Second operand 8 states and 174 transitions. [2024-06-03 20:33:55,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 314 transitions, 5730 flow [2024-06-03 20:33:55,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 314 transitions, 5495 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:55,634 INFO L231 Difference]: Finished difference. Result has 193 places, 296 transitions, 4810 flow [2024-06-03 20:33:55,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4810, PETRI_PLACES=193, PETRI_TRANSITIONS=296} [2024-06-03 20:33:55,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-03 20:33:55,635 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 296 transitions, 4810 flow [2024-06-03 20:33:55,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:55,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:55,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:55,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:33:55,635 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)] === [2024-06-03 20:33:55,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1877076690, now seen corresponding path program 3 times [2024-06-03 20:33:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:55,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378186507] [2024-06-03 20:33:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:55,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:55,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:55,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378186507] [2024-06-03 20:33:55,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378186507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:55,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:55,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:55,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365108367] [2024-06-03 20:33:55,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:55,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:55,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:55,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:55,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:55,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 296 transitions, 4810 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:55,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:55,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:55,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:56,313 INFO L124 PetriNetUnfolderBase]: 1857/3139 cut-off events. [2024-06-03 20:33:56,314 INFO L125 PetriNetUnfolderBase]: For 121821/121821 co-relation queries the response was YES. [2024-06-03 20:33:56,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21735 conditions, 3139 events. 1857/3139 cut-off events. For 121821/121821 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18982 event pairs, 350 based on Foata normal form. 3/3141 useless extension candidates. Maximal degree in co-relation 21642. Up to 2430 conditions per place. [2024-06-03 20:33:56,345 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 146 changer transitions 0/331 dead transitions. [2024-06-03 20:33:56,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 331 transitions, 5890 flow [2024-06-03 20:33:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:33:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:33:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:33:56,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:33:56,347 INFO L175 Difference]: Start difference. First operand has 193 places, 296 transitions, 4810 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:33:56,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 331 transitions, 5890 flow [2024-06-03 20:33:56,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 331 transitions, 5826 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:56,648 INFO L231 Difference]: Finished difference. Result has 199 places, 301 transitions, 5151 flow [2024-06-03 20:33:56,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5151, PETRI_PLACES=199, PETRI_TRANSITIONS=301} [2024-06-03 20:33:56,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-03 20:33:56,648 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 301 transitions, 5151 flow [2024-06-03 20:33:56,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:56,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:56,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:56,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:33:56,649 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)] === [2024-06-03 20:33:56,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash 811371509, now seen corresponding path program 1 times [2024-06-03 20:33:56,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:56,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20738214] [2024-06-03 20:33:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:56,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20738214] [2024-06-03 20:33:56,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20738214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:56,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:56,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397438692] [2024-06-03 20:33:56,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:56,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:56,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:56,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 301 transitions, 5151 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:56,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:56,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:56,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:57,375 INFO L124 PetriNetUnfolderBase]: 1960/3282 cut-off events. [2024-06-03 20:33:57,375 INFO L125 PetriNetUnfolderBase]: For 149021/149021 co-relation queries the response was YES. [2024-06-03 20:33:57,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23373 conditions, 3282 events. 1960/3282 cut-off events. For 149021/149021 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19761 event pairs, 305 based on Foata normal form. 12/3289 useless extension candidates. Maximal degree in co-relation 23278. Up to 2400 conditions per place. [2024-06-03 20:33:57,410 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 104 changer transitions 0/345 dead transitions. [2024-06-03 20:33:57,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 345 transitions, 6383 flow [2024-06-03 20:33:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 20:33:57,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-03 20:33:57,411 INFO L175 Difference]: Start difference. First operand has 199 places, 301 transitions, 5151 flow. Second operand 7 states and 182 transitions. [2024-06-03 20:33:57,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 345 transitions, 6383 flow [2024-06-03 20:33:57,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 345 transitions, 6229 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:57,714 INFO L231 Difference]: Finished difference. Result has 203 places, 307 transitions, 5313 flow [2024-06-03 20:33:57,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5313, PETRI_PLACES=203, PETRI_TRANSITIONS=307} [2024-06-03 20:33:57,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-03 20:33:57,715 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 307 transitions, 5313 flow [2024-06-03 20:33:57,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:57,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:57,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:57,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:33:57,716 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)] === [2024-06-03 20:33:57,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:57,716 INFO L85 PathProgramCache]: Analyzing trace with hash 591174865, now seen corresponding path program 2 times [2024-06-03 20:33:57,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:57,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151161479] [2024-06-03 20:33:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:57,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:57,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:57,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151161479] [2024-06-03 20:33:57,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151161479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:57,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:57,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092784627] [2024-06-03 20:33:57,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:57,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:57,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:57,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:57,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 307 transitions, 5313 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:57,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:57,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:57,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:58,492 INFO L124 PetriNetUnfolderBase]: 2004/3344 cut-off events. [2024-06-03 20:33:58,492 INFO L125 PetriNetUnfolderBase]: For 151065/151065 co-relation queries the response was YES. [2024-06-03 20:33:58,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24182 conditions, 3344 events. 2004/3344 cut-off events. For 151065/151065 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20144 event pairs, 421 based on Foata normal form. 12/3351 useless extension candidates. Maximal degree in co-relation 24085. Up to 2714 conditions per place. [2024-06-03 20:33:58,530 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 99 changer transitions 0/340 dead transitions. [2024-06-03 20:33:58,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 340 transitions, 6379 flow [2024-06-03 20:33:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:33:58,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:33:58,532 INFO L175 Difference]: Start difference. First operand has 203 places, 307 transitions, 5313 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:33:58,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 340 transitions, 6379 flow [2024-06-03 20:33:58,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 340 transitions, 6203 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:58,916 INFO L231 Difference]: Finished difference. Result has 207 places, 310 transitions, 5398 flow [2024-06-03 20:33:58,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5398, PETRI_PLACES=207, PETRI_TRANSITIONS=310} [2024-06-03 20:33:58,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-03 20:33:58,917 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 310 transitions, 5398 flow [2024-06-03 20:33:58,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:58,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:58,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:58,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:33:58,917 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)] === [2024-06-03 20:33:58,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:58,918 INFO L85 PathProgramCache]: Analyzing trace with hash 701053993, now seen corresponding path program 1 times [2024-06-03 20:33:58,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:58,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334226017] [2024-06-03 20:33:58,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:58,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:59,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334226017] [2024-06-03 20:33:59,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334226017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:59,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:59,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:59,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569574893] [2024-06-03 20:33:59,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:59,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:59,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:59,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:59,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 310 transitions, 5398 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:59,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:59,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:59,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:59,643 INFO L124 PetriNetUnfolderBase]: 2030/3390 cut-off events. [2024-06-03 20:33:59,643 INFO L125 PetriNetUnfolderBase]: For 149647/149647 co-relation queries the response was YES. [2024-06-03 20:33:59,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24920 conditions, 3390 events. 2030/3390 cut-off events. For 149647/149647 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20535 event pairs, 443 based on Foata normal form. 2/3387 useless extension candidates. Maximal degree in co-relation 24821. Up to 2460 conditions per place. [2024-06-03 20:33:59,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 146 selfloop transitions, 191 changer transitions 0/343 dead transitions. [2024-06-03 20:33:59,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 343 transitions, 6593 flow [2024-06-03 20:33:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:33:59,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:33:59,683 INFO L175 Difference]: Start difference. First operand has 207 places, 310 transitions, 5398 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:33:59,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 343 transitions, 6593 flow [2024-06-03 20:34:00,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 343 transitions, 6380 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:00,080 INFO L231 Difference]: Finished difference. Result has 210 places, 320 transitions, 5811 flow [2024-06-03 20:34:00,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5185, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5811, PETRI_PLACES=210, PETRI_TRANSITIONS=320} [2024-06-03 20:34:00,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-03 20:34:00,081 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 320 transitions, 5811 flow [2024-06-03 20:34:00,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:00,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:00,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:00,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:34:00,082 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)] === [2024-06-03 20:34:00,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:00,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1521460397, now seen corresponding path program 1 times [2024-06-03 20:34:00,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:00,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29581581] [2024-06-03 20:34:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:00,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:00,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29581581] [2024-06-03 20:34:00,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29581581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:00,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:00,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:00,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250096887] [2024-06-03 20:34:00,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:00,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:00,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:00,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:00,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 320 transitions, 5811 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:00,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:00,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:00,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:00,824 INFO L124 PetriNetUnfolderBase]: 2040/3407 cut-off events. [2024-06-03 20:34:00,824 INFO L125 PetriNetUnfolderBase]: For 156660/156660 co-relation queries the response was YES. [2024-06-03 20:34:00,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25529 conditions, 3407 events. 2040/3407 cut-off events. For 156660/156660 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20620 event pairs, 418 based on Foata normal form. 2/3404 useless extension candidates. Maximal degree in co-relation 25428. Up to 2804 conditions per place. [2024-06-03 20:34:00,856 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 95 changer transitions 0/346 dead transitions. [2024-06-03 20:34:00,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 346 transitions, 6801 flow [2024-06-03 20:34:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:34:00,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:34:00,858 INFO L175 Difference]: Start difference. First operand has 210 places, 320 transitions, 5811 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:34:00,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 346 transitions, 6801 flow [2024-06-03 20:34:01,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 346 transitions, 6544 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 20:34:01,221 INFO L231 Difference]: Finished difference. Result has 214 places, 324 transitions, 5825 flow [2024-06-03 20:34:01,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5558, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5825, PETRI_PLACES=214, PETRI_TRANSITIONS=324} [2024-06-03 20:34:01,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-03 20:34:01,222 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 324 transitions, 5825 flow [2024-06-03 20:34:01,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:01,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:01,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:01,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:34:01,223 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)] === [2024-06-03 20:34:01,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:01,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1107190187, now seen corresponding path program 2 times [2024-06-03 20:34:01,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:01,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339226397] [2024-06-03 20:34:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:01,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:01,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:01,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339226397] [2024-06-03 20:34:01,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339226397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:01,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:01,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895531869] [2024-06-03 20:34:01,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:01,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:01,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:01,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 324 transitions, 5825 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:01,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:01,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:01,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:01,925 INFO L124 PetriNetUnfolderBase]: 2050/3421 cut-off events. [2024-06-03 20:34:01,926 INFO L125 PetriNetUnfolderBase]: For 163210/163210 co-relation queries the response was YES. [2024-06-03 20:34:01,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25503 conditions, 3421 events. 2050/3421 cut-off events. For 163210/163210 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 20712 event pairs, 443 based on Foata normal form. 2/3418 useless extension candidates. Maximal degree in co-relation 25401. Up to 2472 conditions per place. [2024-06-03 20:34:01,965 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 185 changer transitions 0/348 dead transitions. [2024-06-03 20:34:01,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 348 transitions, 6913 flow [2024-06-03 20:34:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:34:01,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 20:34:01,967 INFO L175 Difference]: Start difference. First operand has 214 places, 324 transitions, 5825 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:34:01,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 348 transitions, 6913 flow [2024-06-03 20:34:02,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 348 transitions, 6701 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:02,329 INFO L231 Difference]: Finished difference. Result has 216 places, 328 transitions, 6069 flow [2024-06-03 20:34:02,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6069, PETRI_PLACES=216, PETRI_TRANSITIONS=328} [2024-06-03 20:34:02,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-03 20:34:02,330 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 328 transitions, 6069 flow [2024-06-03 20:34:02,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:02,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:02,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:02,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:34:02,331 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)] === [2024-06-03 20:34:02,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash 141413913, now seen corresponding path program 2 times [2024-06-03 20:34:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:02,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717893547] [2024-06-03 20:34:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:02,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:02,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:02,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717893547] [2024-06-03 20:34:02,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717893547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:02,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:02,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:02,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214630416] [2024-06-03 20:34:02,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:02,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:02,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:02,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:02,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 328 transitions, 6069 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:02,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:02,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:02,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:03,064 INFO L124 PetriNetUnfolderBase]: 2060/3441 cut-off events. [2024-06-03 20:34:03,064 INFO L125 PetriNetUnfolderBase]: For 170755/170755 co-relation queries the response was YES. [2024-06-03 20:34:03,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26077 conditions, 3441 events. 2060/3441 cut-off events. For 170755/170755 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 20899 event pairs, 416 based on Foata normal form. 2/3438 useless extension candidates. Maximal degree in co-relation 25974. Up to 2828 conditions per place. [2024-06-03 20:34:03,102 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 96 changer transitions 0/355 dead transitions. [2024-06-03 20:34:03,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 355 transitions, 7209 flow [2024-06-03 20:34:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 20:34:03,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-03 20:34:03,103 INFO L175 Difference]: Start difference. First operand has 216 places, 328 transitions, 6069 flow. Second operand 8 states and 183 transitions. [2024-06-03 20:34:03,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 355 transitions, 7209 flow [2024-06-03 20:34:03,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 355 transitions, 6848 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:03,487 INFO L231 Difference]: Finished difference. Result has 220 places, 334 transitions, 6013 flow [2024-06-03 20:34:03,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6013, PETRI_PLACES=220, PETRI_TRANSITIONS=334} [2024-06-03 20:34:03,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-03 20:34:03,488 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 334 transitions, 6013 flow [2024-06-03 20:34:03,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:03,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:03,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:03,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:34:03,488 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)] === [2024-06-03 20:34:03,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash 878185513, now seen corresponding path program 3 times [2024-06-03 20:34:03,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:03,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188361517] [2024-06-03 20:34:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:03,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188361517] [2024-06-03 20:34:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188361517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:03,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:03,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276794902] [2024-06-03 20:34:03,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:03,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:03,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:03,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:03,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 334 transitions, 6013 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:03,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:03,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:03,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:04,204 INFO L124 PetriNetUnfolderBase]: 2054/3425 cut-off events. [2024-06-03 20:34:04,205 INFO L125 PetriNetUnfolderBase]: For 172499/172499 co-relation queries the response was YES. [2024-06-03 20:34:04,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25705 conditions, 3425 events. 2054/3425 cut-off events. For 172499/172499 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 20743 event pairs, 444 based on Foata normal form. 2/3422 useless extension candidates. Maximal degree in co-relation 25601. Up to 2475 conditions per place. [2024-06-03 20:34:04,241 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 188 changer transitions 0/354 dead transitions. [2024-06-03 20:34:04,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 354 transitions, 7051 flow [2024-06-03 20:34:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:34:04,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 20:34:04,242 INFO L175 Difference]: Start difference. First operand has 220 places, 334 transitions, 6013 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:34:04,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 354 transitions, 7051 flow [2024-06-03 20:34:04,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 354 transitions, 6872 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:04,646 INFO L231 Difference]: Finished difference. Result has 223 places, 334 transitions, 6217 flow [2024-06-03 20:34:04,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5834, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6217, PETRI_PLACES=223, PETRI_TRANSITIONS=334} [2024-06-03 20:34:04,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-03 20:34:04,647 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 334 transitions, 6217 flow [2024-06-03 20:34:04,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:04,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:04,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:04,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:34:04,647 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)] === [2024-06-03 20:34:04,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:04,648 INFO L85 PathProgramCache]: Analyzing trace with hash 878062195, now seen corresponding path program 3 times [2024-06-03 20:34:04,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:04,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178850242] [2024-06-03 20:34:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:04,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:04,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178850242] [2024-06-03 20:34:04,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178850242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:04,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:04,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633547998] [2024-06-03 20:34:04,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:04,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:04,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:04,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:04,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:04,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:04,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 334 transitions, 6217 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:04,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:04,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:04,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:05,419 INFO L124 PetriNetUnfolderBase]: 2098/3495 cut-off events. [2024-06-03 20:34:05,419 INFO L125 PetriNetUnfolderBase]: For 194331/194331 co-relation queries the response was YES. [2024-06-03 20:34:05,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26449 conditions, 3495 events. 2098/3495 cut-off events. For 194331/194331 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21176 event pairs, 426 based on Foata normal form. 12/3502 useless extension candidates. Maximal degree in co-relation 26343. Up to 2844 conditions per place. [2024-06-03 20:34:05,458 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 99 changer transitions 0/360 dead transitions. [2024-06-03 20:34:05,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 360 transitions, 7239 flow [2024-06-03 20:34:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:34:05,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:34:05,460 INFO L175 Difference]: Start difference. First operand has 223 places, 334 transitions, 6217 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:34:05,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 360 transitions, 7239 flow [2024-06-03 20:34:05,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 360 transitions, 6883 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:05,860 INFO L231 Difference]: Finished difference. Result has 226 places, 337 transitions, 6120 flow [2024-06-03 20:34:05,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5861, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6120, PETRI_PLACES=226, PETRI_TRANSITIONS=337} [2024-06-03 20:34:05,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-03 20:34:05,861 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 337 transitions, 6120 flow [2024-06-03 20:34:05,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:05,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:05,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:05,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:34:05,861 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)] === [2024-06-03 20:34:05,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash 878431591, now seen corresponding path program 1 times [2024-06-03 20:34:05,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:05,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204083954] [2024-06-03 20:34:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:05,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204083954] [2024-06-03 20:34:06,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204083954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:06,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339930054] [2024-06-03 20:34:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:06,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:06,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 337 transitions, 6120 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:06,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:06,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:06,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:06,613 INFO L124 PetriNetUnfolderBase]: 2106/3524 cut-off events. [2024-06-03 20:34:06,614 INFO L125 PetriNetUnfolderBase]: For 184614/184614 co-relation queries the response was YES. [2024-06-03 20:34:06,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26476 conditions, 3524 events. 2106/3524 cut-off events. For 184614/184614 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21453 event pairs, 389 based on Foata normal form. 2/3525 useless extension candidates. Maximal degree in co-relation 26369. Up to 3176 conditions per place. [2024-06-03 20:34:06,655 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 324 selfloop transitions, 27 changer transitions 0/357 dead transitions. [2024-06-03 20:34:06,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 357 transitions, 6914 flow [2024-06-03 20:34:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 20:34:06,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 20:34:06,657 INFO L175 Difference]: Start difference. First operand has 226 places, 337 transitions, 6120 flow. Second operand 7 states and 152 transitions. [2024-06-03 20:34:06,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 357 transitions, 6914 flow [2024-06-03 20:34:07,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 357 transitions, 6695 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:07,069 INFO L231 Difference]: Finished difference. Result has 228 places, 339 transitions, 6012 flow [2024-06-03 20:34:07,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5901, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6012, PETRI_PLACES=228, PETRI_TRANSITIONS=339} [2024-06-03 20:34:07,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-03 20:34:07,069 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 339 transitions, 6012 flow [2024-06-03 20:34:07,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:07,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:07,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:07,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:34:07,070 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)] === [2024-06-03 20:34:07,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:07,071 INFO L85 PathProgramCache]: Analyzing trace with hash -645479789, now seen corresponding path program 3 times [2024-06-03 20:34:07,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:07,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824205360] [2024-06-03 20:34:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:07,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:07,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:07,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824205360] [2024-06-03 20:34:07,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824205360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:07,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:07,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:07,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496010899] [2024-06-03 20:34:07,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:07,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:07,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:07,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:07,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:07,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 339 transitions, 6012 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:07,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:07,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:07,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:07,798 INFO L124 PetriNetUnfolderBase]: 2103/3504 cut-off events. [2024-06-03 20:34:07,798 INFO L125 PetriNetUnfolderBase]: For 189569/189577 co-relation queries the response was YES. [2024-06-03 20:34:07,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26187 conditions, 3504 events. 2103/3504 cut-off events. For 189569/189577 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21299 event pairs, 428 based on Foata normal form. 4/3503 useless extension candidates. Maximal degree in co-relation 26079. Up to 2898 conditions per place. [2024-06-03 20:34:07,834 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 103 changer transitions 0/358 dead transitions. [2024-06-03 20:34:07,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 358 transitions, 6970 flow [2024-06-03 20:34:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:34:07,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-03 20:34:07,836 INFO L175 Difference]: Start difference. First operand has 228 places, 339 transitions, 6012 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:34:07,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 358 transitions, 6970 flow [2024-06-03 20:34:08,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 358 transitions, 6867 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:08,267 INFO L231 Difference]: Finished difference. Result has 230 places, 339 transitions, 6121 flow [2024-06-03 20:34:08,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6121, PETRI_PLACES=230, PETRI_TRANSITIONS=339} [2024-06-03 20:34:08,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-03 20:34:08,268 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 339 transitions, 6121 flow [2024-06-03 20:34:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:08,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:08,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:08,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:34:08,269 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)] === [2024-06-03 20:34:08,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1259812477, now seen corresponding path program 4 times [2024-06-03 20:34:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:08,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288609882] [2024-06-03 20:34:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:08,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:08,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:08,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288609882] [2024-06-03 20:34:08,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288609882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:08,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:08,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:08,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733333574] [2024-06-03 20:34:08,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:08,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:08,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:08,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:08,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:08,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:08,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 339 transitions, 6121 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:08,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:08,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:08,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:08,973 INFO L124 PetriNetUnfolderBase]: 2093/3484 cut-off events. [2024-06-03 20:34:08,973 INFO L125 PetriNetUnfolderBase]: For 196516/196524 co-relation queries the response was YES. [2024-06-03 20:34:08,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26318 conditions, 3484 events. 2093/3484 cut-off events. For 196516/196524 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21140 event pairs, 447 based on Foata normal form. 5/3484 useless extension candidates. Maximal degree in co-relation 26209. Up to 2546 conditions per place. [2024-06-03 20:34:09,010 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 209 changer transitions 0/359 dead transitions. [2024-06-03 20:34:09,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 359 transitions, 7193 flow [2024-06-03 20:34:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:34:09,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-03 20:34:09,012 INFO L175 Difference]: Start difference. First operand has 230 places, 339 transitions, 6121 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:34:09,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 359 transitions, 7193 flow [2024-06-03 20:34:09,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 359 transitions, 6951 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:09,424 INFO L231 Difference]: Finished difference. Result has 232 places, 339 transitions, 6304 flow [2024-06-03 20:34:09,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5879, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6304, PETRI_PLACES=232, PETRI_TRANSITIONS=339} [2024-06-03 20:34:09,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-03 20:34:09,425 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 339 transitions, 6304 flow [2024-06-03 20:34:09,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:09,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:09,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:09,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:34:09,426 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)] === [2024-06-03 20:34:09,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:09,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1499021311, now seen corresponding path program 4 times [2024-06-03 20:34:09,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:09,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26007320] [2024-06-03 20:34:09,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:09,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:09,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:09,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26007320] [2024-06-03 20:34:09,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26007320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:09,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:09,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:09,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993175449] [2024-06-03 20:34:09,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:09,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:09,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:09,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:09,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 339 transitions, 6304 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:09,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:09,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:09,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:10,147 INFO L124 PetriNetUnfolderBase]: 2090/3486 cut-off events. [2024-06-03 20:34:10,148 INFO L125 PetriNetUnfolderBase]: For 200337/200345 co-relation queries the response was YES. [2024-06-03 20:34:10,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26650 conditions, 3486 events. 2090/3486 cut-off events. For 200337/200345 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21169 event pairs, 428 based on Foata normal form. 4/3485 useless extension candidates. Maximal degree in co-relation 26540. Up to 2882 conditions per place. [2024-06-03 20:34:10,187 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 107 changer transitions 0/357 dead transitions. [2024-06-03 20:34:10,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 357 transitions, 7158 flow [2024-06-03 20:34:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:34:10,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:34:10,188 INFO L175 Difference]: Start difference. First operand has 232 places, 339 transitions, 6304 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:34:10,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 357 transitions, 7158 flow [2024-06-03 20:34:10,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 357 transitions, 6214 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-03 20:34:10,619 INFO L231 Difference]: Finished difference. Result has 226 places, 339 transitions, 5580 flow [2024-06-03 20:34:10,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5580, PETRI_PLACES=226, PETRI_TRANSITIONS=339} [2024-06-03 20:34:10,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-03 20:34:10,620 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 339 transitions, 5580 flow [2024-06-03 20:34:10,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:10,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:10,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:10,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:34:10,621 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)] === [2024-06-03 20:34:10,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1269989467, now seen corresponding path program 5 times [2024-06-03 20:34:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:10,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692233089] [2024-06-03 20:34:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:10,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:10,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692233089] [2024-06-03 20:34:10,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692233089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:10,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:10,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:10,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222267380] [2024-06-03 20:34:10,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:10,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:10,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:10,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:10,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:10,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:10,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 339 transitions, 5580 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:10,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:10,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:10,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:11,342 INFO L124 PetriNetUnfolderBase]: 2084/3492 cut-off events. [2024-06-03 20:34:11,343 INFO L125 PetriNetUnfolderBase]: For 194869/194869 co-relation queries the response was YES. [2024-06-03 20:34:11,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25791 conditions, 3492 events. 2084/3492 cut-off events. For 194869/194869 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21274 event pairs, 385 based on Foata normal form. 2/3493 useless extension candidates. Maximal degree in co-relation 25682. Up to 3115 conditions per place. [2024-06-03 20:34:11,381 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 50 changer transitions 0/357 dead transitions. [2024-06-03 20:34:11,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 357 transitions, 6555 flow [2024-06-03 20:34:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:11,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 20:34:11,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 20:34:11,383 INFO L175 Difference]: Start difference. First operand has 226 places, 339 transitions, 5580 flow. Second operand 8 states and 174 transitions. [2024-06-03 20:34:11,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 357 transitions, 6555 flow [2024-06-03 20:34:11,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 357 transitions, 6339 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:11,836 INFO L231 Difference]: Finished difference. Result has 230 places, 339 transitions, 5477 flow [2024-06-03 20:34:11,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5370, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5477, PETRI_PLACES=230, PETRI_TRANSITIONS=339} [2024-06-03 20:34:11,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-03 20:34:11,837 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 339 transitions, 5477 flow [2024-06-03 20:34:11,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:11,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:11,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:11,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:34:11,838 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)] === [2024-06-03 20:34:11,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1085107895, now seen corresponding path program 6 times [2024-06-03 20:34:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:11,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114467150] [2024-06-03 20:34:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:11,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:12,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114467150] [2024-06-03 20:34:12,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114467150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:12,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:12,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:12,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347415982] [2024-06-03 20:34:12,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:12,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:12,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:12,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:12,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 339 transitions, 5477 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:12,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:12,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:12,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:12,586 INFO L124 PetriNetUnfolderBase]: 2076/3480 cut-off events. [2024-06-03 20:34:12,586 INFO L125 PetriNetUnfolderBase]: For 190791/190791 co-relation queries the response was YES. [2024-06-03 20:34:12,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25292 conditions, 3480 events. 2076/3480 cut-off events. For 190791/190791 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21245 event pairs, 385 based on Foata normal form. 2/3481 useless extension candidates. Maximal degree in co-relation 25182. Up to 2766 conditions per place. [2024-06-03 20:34:12,624 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 145 changer transitions 0/369 dead transitions. [2024-06-03 20:34:12,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 369 transitions, 6607 flow [2024-06-03 20:34:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:34:12,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-03 20:34:12,625 INFO L175 Difference]: Start difference. First operand has 230 places, 339 transitions, 5477 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:34:12,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 369 transitions, 6607 flow [2024-06-03 20:34:13,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 369 transitions, 6485 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:13,054 INFO L231 Difference]: Finished difference. Result has 233 places, 339 transitions, 5657 flow [2024-06-03 20:34:13,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5657, PETRI_PLACES=233, PETRI_TRANSITIONS=339} [2024-06-03 20:34:13,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-03 20:34:13,055 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 339 transitions, 5657 flow [2024-06-03 20:34:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:13,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:13,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:13,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:34:13,056 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)] === [2024-06-03 20:34:13,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1927407209, now seen corresponding path program 7 times [2024-06-03 20:34:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:13,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575705795] [2024-06-03 20:34:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:13,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:13,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575705795] [2024-06-03 20:34:13,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575705795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:13,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:13,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:13,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714577708] [2024-06-03 20:34:13,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:13,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:13,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:13,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 339 transitions, 5657 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:13,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:13,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:13,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:13,797 INFO L124 PetriNetUnfolderBase]: 2086/3495 cut-off events. [2024-06-03 20:34:13,810 INFO L125 PetriNetUnfolderBase]: For 199203/199205 co-relation queries the response was YES. [2024-06-03 20:34:13,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25904 conditions, 3495 events. 2086/3495 cut-off events. For 199203/199205 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21345 event pairs, 392 based on Foata normal form. 4/3498 useless extension candidates. Maximal degree in co-relation 25793. Up to 2772 conditions per place. [2024-06-03 20:34:13,847 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 136 changer transitions 0/369 dead transitions. [2024-06-03 20:34:13,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 369 transitions, 6864 flow [2024-06-03 20:34:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:34:13,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-03 20:34:13,858 INFO L175 Difference]: Start difference. First operand has 233 places, 339 transitions, 5657 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:34:13,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 369 transitions, 6864 flow [2024-06-03 20:34:14,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 369 transitions, 6621 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:14,326 INFO L231 Difference]: Finished difference. Result has 234 places, 343 transitions, 5780 flow [2024-06-03 20:34:14,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5780, PETRI_PLACES=234, PETRI_TRANSITIONS=343} [2024-06-03 20:34:14,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-03 20:34:14,327 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 343 transitions, 5780 flow [2024-06-03 20:34:14,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:14,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:14,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:14,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:34:14,327 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)] === [2024-06-03 20:34:14,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:14,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2117308919, now seen corresponding path program 8 times [2024-06-03 20:34:14,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:14,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446743677] [2024-06-03 20:34:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:14,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:14,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:14,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446743677] [2024-06-03 20:34:14,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446743677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:14,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:14,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:14,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531107861] [2024-06-03 20:34:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:14,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:14,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:14,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:14,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:14,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 343 transitions, 5780 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:14,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:14,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:14,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:15,032 INFO L124 PetriNetUnfolderBase]: 2078/3483 cut-off events. [2024-06-03 20:34:15,033 INFO L125 PetriNetUnfolderBase]: For 196762/196764 co-relation queries the response was YES. [2024-06-03 20:34:15,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25636 conditions, 3483 events. 2078/3483 cut-off events. For 196762/196764 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21236 event pairs, 392 based on Foata normal form. 4/3486 useless extension candidates. Maximal degree in co-relation 25526. Up to 2767 conditions per place. [2024-06-03 20:34:15,070 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 130 changer transitions 0/365 dead transitions. [2024-06-03 20:34:15,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 365 transitions, 6776 flow [2024-06-03 20:34:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:34:15,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 20:34:15,072 INFO L175 Difference]: Start difference. First operand has 234 places, 343 transitions, 5780 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:34:15,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 365 transitions, 6776 flow [2024-06-03 20:34:15,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 365 transitions, 6296 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:34:15,542 INFO L231 Difference]: Finished difference. Result has 234 places, 343 transitions, 5569 flow [2024-06-03 20:34:15,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5569, PETRI_PLACES=234, PETRI_TRANSITIONS=343} [2024-06-03 20:34:15,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-03 20:34:15,543 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 343 transitions, 5569 flow [2024-06-03 20:34:15,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:15,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:15,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:15,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:34:15,544 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)] === [2024-06-03 20:34:15,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1927283891, now seen corresponding path program 4 times [2024-06-03 20:34:15,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:15,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513328599] [2024-06-03 20:34:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:15,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:15,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513328599] [2024-06-03 20:34:15,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513328599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:15,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:15,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:15,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680125068] [2024-06-03 20:34:15,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:15,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:15,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:15,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:15,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:15,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:15,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 343 transitions, 5569 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:15,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:15,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:15,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:16,335 INFO L124 PetriNetUnfolderBase]: 2228/3729 cut-off events. [2024-06-03 20:34:16,335 INFO L125 PetriNetUnfolderBase]: For 282769/282771 co-relation queries the response was YES. [2024-06-03 20:34:16,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26409 conditions, 3729 events. 2228/3729 cut-off events. For 282769/282771 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22921 event pairs, 326 based on Foata normal form. 56/3784 useless extension candidates. Maximal degree in co-relation 26298. Up to 2754 conditions per place. [2024-06-03 20:34:16,374 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 107 changer transitions 1/382 dead transitions. [2024-06-03 20:34:16,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 382 transitions, 6599 flow [2024-06-03 20:34:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 20:34:16,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-03 20:34:16,375 INFO L175 Difference]: Start difference. First operand has 234 places, 343 transitions, 5569 flow. Second operand 7 states and 184 transitions. [2024-06-03 20:34:16,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 382 transitions, 6599 flow [2024-06-03 20:34:16,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 382 transitions, 6293 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:34:16,817 INFO L231 Difference]: Finished difference. Result has 234 places, 345 transitions, 5533 flow [2024-06-03 20:34:16,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5263, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5533, PETRI_PLACES=234, PETRI_TRANSITIONS=345} [2024-06-03 20:34:16,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-03 20:34:16,818 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 345 transitions, 5533 flow [2024-06-03 20:34:16,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:16,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:16,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:16,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:34:16,819 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)] === [2024-06-03 20:34:16,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:16,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1927653287, now seen corresponding path program 2 times [2024-06-03 20:34:16,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:16,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248039191] [2024-06-03 20:34:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:16,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:17,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:17,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248039191] [2024-06-03 20:34:17,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248039191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:17,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:17,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:17,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068348099] [2024-06-03 20:34:17,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:17,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:17,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:17,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:17,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 345 transitions, 5533 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:17,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:17,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:17,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:17,566 INFO L124 PetriNetUnfolderBase]: 2226/3726 cut-off events. [2024-06-03 20:34:17,566 INFO L125 PetriNetUnfolderBase]: For 203683/203683 co-relation queries the response was YES. [2024-06-03 20:34:17,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26740 conditions, 3726 events. 2226/3726 cut-off events. For 203683/203683 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22888 event pairs, 430 based on Foata normal form. 2/3727 useless extension candidates. Maximal degree in co-relation 26628. Up to 3388 conditions per place. [2024-06-03 20:34:17,604 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 336 selfloop transitions, 22 changer transitions 0/364 dead transitions. [2024-06-03 20:34:17,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 364 transitions, 6343 flow [2024-06-03 20:34:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 20:34:17,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:34:17,606 INFO L175 Difference]: Start difference. First operand has 234 places, 345 transitions, 5533 flow. Second operand 6 states and 135 transitions. [2024-06-03 20:34:17,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 364 transitions, 6343 flow [2024-06-03 20:34:18,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 364 transitions, 6101 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:18,052 INFO L231 Difference]: Finished difference. Result has 235 places, 347 transitions, 5396 flow [2024-06-03 20:34:18,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5396, PETRI_PLACES=235, PETRI_TRANSITIONS=347} [2024-06-03 20:34:18,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-03 20:34:18,053 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 347 transitions, 5396 flow [2024-06-03 20:34:18,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:18,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:18,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:18,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:34:18,053 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)] === [2024-06-03 20:34:18,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1939271777, now seen corresponding path program 3 times [2024-06-03 20:34:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:18,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123241978] [2024-06-03 20:34:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:18,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:18,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:18,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123241978] [2024-06-03 20:34:18,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123241978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:18,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:18,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:18,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678723181] [2024-06-03 20:34:18,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:18,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:18,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:18,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 347 transitions, 5396 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:18,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:18,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:18,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:18,807 INFO L124 PetriNetUnfolderBase]: 2234/3738 cut-off events. [2024-06-03 20:34:18,807 INFO L125 PetriNetUnfolderBase]: For 201608/201608 co-relation queries the response was YES. [2024-06-03 20:34:18,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26296 conditions, 3738 events. 2234/3738 cut-off events. For 201608/201608 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22996 event pairs, 432 based on Foata normal form. 2/3739 useless extension candidates. Maximal degree in co-relation 26183. Up to 3403 conditions per place. [2024-06-03 20:34:18,845 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 340 selfloop transitions, 19 changer transitions 0/365 dead transitions. [2024-06-03 20:34:18,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 365 transitions, 6208 flow [2024-06-03 20:34:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:34:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:34:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 20:34:18,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-03 20:34:18,847 INFO L175 Difference]: Start difference. First operand has 235 places, 347 transitions, 5396 flow. Second operand 5 states and 118 transitions. [2024-06-03 20:34:18,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 365 transitions, 6208 flow [2024-06-03 20:34:19,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 365 transitions, 6117 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:19,309 INFO L231 Difference]: Finished difference. Result has 236 places, 349 transitions, 5406 flow [2024-06-03 20:34:19,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5406, PETRI_PLACES=236, PETRI_TRANSITIONS=349} [2024-06-03 20:34:19,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-03 20:34:19,309 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 349 transitions, 5406 flow [2024-06-03 20:34:19,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:19,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:19,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:19,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:34:19,310 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)] === [2024-06-03 20:34:19,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1703517881, now seen corresponding path program 4 times [2024-06-03 20:34:19,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:19,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450354930] [2024-06-03 20:34:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:19,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:19,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:19,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450354930] [2024-06-03 20:34:19,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450354930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:19,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:19,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:19,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014491148] [2024-06-03 20:34:19,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:19,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:19,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:19,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:19,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:19,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:19,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 349 transitions, 5406 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:19,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:19,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:19,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:20,088 INFO L124 PetriNetUnfolderBase]: 2229/3731 cut-off events. [2024-06-03 20:34:20,088 INFO L125 PetriNetUnfolderBase]: For 203950/203950 co-relation queries the response was YES. [2024-06-03 20:34:20,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26166 conditions, 3731 events. 2229/3731 cut-off events. For 203950/203950 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22897 event pairs, 429 based on Foata normal form. 2/3732 useless extension candidates. Maximal degree in co-relation 26052. Up to 3382 conditions per place. [2024-06-03 20:34:20,126 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 340 selfloop transitions, 23 changer transitions 0/369 dead transitions. [2024-06-03 20:34:20,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 369 transitions, 6234 flow [2024-06-03 20:34:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:20,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 20:34:20,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 20:34:20,127 INFO L175 Difference]: Start difference. First operand has 236 places, 349 transitions, 5406 flow. Second operand 6 states and 136 transitions. [2024-06-03 20:34:20,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 369 transitions, 6234 flow [2024-06-03 20:34:20,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 369 transitions, 6149 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 20:34:20,540 INFO L231 Difference]: Finished difference. Result has 239 places, 351 transitions, 5434 flow [2024-06-03 20:34:20,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5321, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5434, PETRI_PLACES=239, PETRI_TRANSITIONS=351} [2024-06-03 20:34:20,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-03 20:34:20,541 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 351 transitions, 5434 flow [2024-06-03 20:34:20,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:20,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:20,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:20,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:34:20,541 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)] === [2024-06-03 20:34:20,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1970058095, now seen corresponding path program 1 times [2024-06-03 20:34:20,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:20,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891038770] [2024-06-03 20:34:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:20,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:20,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891038770] [2024-06-03 20:34:20,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891038770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:20,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:20,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:20,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770197076] [2024-06-03 20:34:20,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:20,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:20,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:20,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 351 transitions, 5434 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:20,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:20,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:20,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:21,372 INFO L124 PetriNetUnfolderBase]: 2332/3880 cut-off events. [2024-06-03 20:34:21,372 INFO L125 PetriNetUnfolderBase]: For 249837/249845 co-relation queries the response was YES. [2024-06-03 20:34:21,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27542 conditions, 3880 events. 2332/3880 cut-off events. For 249837/249845 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23896 event pairs, 415 based on Foata normal form. 15/3890 useless extension candidates. Maximal degree in co-relation 27427. Up to 2990 conditions per place. [2024-06-03 20:34:21,409 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 115 changer transitions 0/387 dead transitions. [2024-06-03 20:34:21,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 387 transitions, 6630 flow [2024-06-03 20:34:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 20:34:21,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-03 20:34:21,410 INFO L175 Difference]: Start difference. First operand has 239 places, 351 transitions, 5434 flow. Second operand 7 states and 174 transitions. [2024-06-03 20:34:21,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 387 transitions, 6630 flow [2024-06-03 20:34:21,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 387 transitions, 6533 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:21,857 INFO L231 Difference]: Finished difference. Result has 242 places, 357 transitions, 5679 flow [2024-06-03 20:34:21,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5679, PETRI_PLACES=242, PETRI_TRANSITIONS=357} [2024-06-03 20:34:21,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-03 20:34:21,857 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 357 transitions, 5679 flow [2024-06-03 20:34:21,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:21,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:21,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:21,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:34:21,858 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)] === [2024-06-03 20:34:21,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:21,858 INFO L85 PathProgramCache]: Analyzing trace with hash -406261841, now seen corresponding path program 2 times [2024-06-03 20:34:21,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:21,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301506953] [2024-06-03 20:34:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:21,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:22,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301506953] [2024-06-03 20:34:22,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301506953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:22,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:22,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:22,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998583399] [2024-06-03 20:34:22,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:22,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:22,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:22,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:22,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:22,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:22,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 357 transitions, 5679 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:22,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:22,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:22,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:22,663 INFO L124 PetriNetUnfolderBase]: 2376/3951 cut-off events. [2024-06-03 20:34:22,663 INFO L125 PetriNetUnfolderBase]: For 259741/259749 co-relation queries the response was YES. [2024-06-03 20:34:22,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28470 conditions, 3951 events. 2376/3951 cut-off events. For 259741/259749 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24383 event pairs, 501 based on Foata normal form. 15/3961 useless extension candidates. Maximal degree in co-relation 28354. Up to 3296 conditions per place. [2024-06-03 20:34:22,706 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 110 changer transitions 0/382 dead transitions. [2024-06-03 20:34:22,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 382 transitions, 6673 flow [2024-06-03 20:34:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:34:22,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-03 20:34:22,707 INFO L175 Difference]: Start difference. First operand has 242 places, 357 transitions, 5679 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:34:22,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 382 transitions, 6673 flow [2024-06-03 20:34:23,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 382 transitions, 6457 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-03 20:34:23,127 INFO L231 Difference]: Finished difference. Result has 246 places, 360 transitions, 5752 flow [2024-06-03 20:34:23,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5477, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5752, PETRI_PLACES=246, PETRI_TRANSITIONS=360} [2024-06-03 20:34:23,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 20:34:23,128 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 360 transitions, 5752 flow [2024-06-03 20:34:23,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:23,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:23,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:23,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:34:23,128 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)] === [2024-06-03 20:34:23,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash -290970671, now seen corresponding path program 3 times [2024-06-03 20:34:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585187060] [2024-06-03 20:34:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:23,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:23,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585187060] [2024-06-03 20:34:23,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585187060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:23,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:23,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:23,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596195446] [2024-06-03 20:34:23,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:23,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:23,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:23,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:23,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:23,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:23,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 360 transitions, 5752 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:23,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:23,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:23,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:23,948 INFO L124 PetriNetUnfolderBase]: 2448/4074 cut-off events. [2024-06-03 20:34:23,949 INFO L125 PetriNetUnfolderBase]: For 281121/281121 co-relation queries the response was YES. [2024-06-03 20:34:23,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29399 conditions, 4074 events. 2448/4074 cut-off events. For 281121/281121 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25259 event pairs, 468 based on Foata normal form. 20/4093 useless extension candidates. Maximal degree in co-relation 29281. Up to 3637 conditions per place. [2024-06-03 20:34:23,994 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 42 changer transitions 0/385 dead transitions. [2024-06-03 20:34:23,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 385 transitions, 6678 flow [2024-06-03 20:34:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 20:34:23,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-03 20:34:23,995 INFO L175 Difference]: Start difference. First operand has 246 places, 360 transitions, 5752 flow. Second operand 8 states and 175 transitions. [2024-06-03 20:34:23,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 385 transitions, 6678 flow [2024-06-03 20:34:24,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 385 transitions, 6433 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:24,500 INFO L231 Difference]: Finished difference. Result has 249 places, 365 transitions, 5707 flow [2024-06-03 20:34:24,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5707, PETRI_PLACES=249, PETRI_TRANSITIONS=365} [2024-06-03 20:34:24,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-03 20:34:24,500 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 365 transitions, 5707 flow [2024-06-03 20:34:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:24,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:24,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:24,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:34:24,501 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)] === [2024-06-03 20:34:24,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:24,501 INFO L85 PathProgramCache]: Analyzing trace with hash -290785973, now seen corresponding path program 1 times [2024-06-03 20:34:24,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:24,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619668212] [2024-06-03 20:34:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:24,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:24,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:24,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619668212] [2024-06-03 20:34:24,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619668212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:24,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:24,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231954963] [2024-06-03 20:34:24,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:24,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:24,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:24,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 365 transitions, 5707 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:24,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:24,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:24,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:25,312 INFO L124 PetriNetUnfolderBase]: 2456/4088 cut-off events. [2024-06-03 20:34:25,312 INFO L125 PetriNetUnfolderBase]: For 253357/253357 co-relation queries the response was YES. [2024-06-03 20:34:25,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29431 conditions, 4088 events. 2456/4088 cut-off events. For 253357/253357 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25404 event pairs, 468 based on Foata normal form. 2/4089 useless extension candidates. Maximal degree in co-relation 29312. Up to 3743 conditions per place. [2024-06-03 20:34:25,358 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 353 selfloop transitions, 24 changer transitions 0/383 dead transitions. [2024-06-03 20:34:25,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 383 transitions, 6543 flow [2024-06-03 20:34:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-03 20:34:25,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-03 20:34:25,359 INFO L175 Difference]: Start difference. First operand has 249 places, 365 transitions, 5707 flow. Second operand 7 states and 149 transitions. [2024-06-03 20:34:25,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 383 transitions, 6543 flow [2024-06-03 20:34:25,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 383 transitions, 6409 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:25,891 INFO L231 Difference]: Finished difference. Result has 251 places, 368 transitions, 5682 flow [2024-06-03 20:34:25,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5682, PETRI_PLACES=251, PETRI_TRANSITIONS=368} [2024-06-03 20:34:25,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-03 20:34:25,892 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 368 transitions, 5682 flow [2024-06-03 20:34:25,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:25,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:25,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:25,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:34:25,893 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)] === [2024-06-03 20:34:25,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:25,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1940168657, now seen corresponding path program 4 times [2024-06-03 20:34:25,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:25,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338325688] [2024-06-03 20:34:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:25,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:26,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338325688] [2024-06-03 20:34:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338325688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:26,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:26,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:26,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740852751] [2024-06-03 20:34:26,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:26,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:26,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:26,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:26,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 368 transitions, 5682 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:26,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:26,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:26,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:26,835 INFO L124 PetriNetUnfolderBase]: 2619/4353 cut-off events. [2024-06-03 20:34:26,835 INFO L125 PetriNetUnfolderBase]: For 364882/364882 co-relation queries the response was YES. [2024-06-03 20:34:26,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30418 conditions, 4353 events. 2619/4353 cut-off events. For 364882/364882 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27286 event pairs, 433 based on Foata normal form. 54/4406 useless extension candidates. Maximal degree in co-relation 30297. Up to 3307 conditions per place. [2024-06-03 20:34:26,887 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 116 changer transitions 1/409 dead transitions. [2024-06-03 20:34:26,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 409 transitions, 6818 flow [2024-06-03 20:34:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 20:34:26,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-03 20:34:26,889 INFO L175 Difference]: Start difference. First operand has 251 places, 368 transitions, 5682 flow. Second operand 8 states and 202 transitions. [2024-06-03 20:34:26,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 409 transitions, 6818 flow [2024-06-03 20:34:27,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 409 transitions, 6735 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:27,483 INFO L231 Difference]: Finished difference. Result has 254 places, 371 transitions, 5932 flow [2024-06-03 20:34:27,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5932, PETRI_PLACES=254, PETRI_TRANSITIONS=371} [2024-06-03 20:34:27,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-03 20:34:27,483 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 371 transitions, 5932 flow [2024-06-03 20:34:27,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:27,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:27,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:27,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:34:27,484 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)] === [2024-06-03 20:34:27,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1939983959, now seen corresponding path program 2 times [2024-06-03 20:34:27,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:27,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033306726] [2024-06-03 20:34:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:27,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:27,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033306726] [2024-06-03 20:34:27,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033306726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:27,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:27,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:27,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722518298] [2024-06-03 20:34:27,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:27,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:27,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:27,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:27,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 371 transitions, 5932 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:27,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:27,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:27,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:28,382 INFO L124 PetriNetUnfolderBase]: 2622/4358 cut-off events. [2024-06-03 20:34:28,382 INFO L125 PetriNetUnfolderBase]: For 268244/268244 co-relation queries the response was YES. [2024-06-03 20:34:28,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31287 conditions, 4358 events. 2622/4358 cut-off events. For 268244/268244 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 27290 event pairs, 515 based on Foata normal form. 2/4359 useless extension candidates. Maximal degree in co-relation 31165. Up to 4006 conditions per place. [2024-06-03 20:34:28,426 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 355 selfloop transitions, 29 changer transitions 0/390 dead transitions. [2024-06-03 20:34:28,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 390 transitions, 6827 flow [2024-06-03 20:34:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:28,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-03 20:34:28,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:34:28,427 INFO L175 Difference]: Start difference. First operand has 254 places, 371 transitions, 5932 flow. Second operand 6 states and 132 transitions. [2024-06-03 20:34:28,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 390 transitions, 6827 flow [2024-06-03 20:34:28,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 390 transitions, 6547 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:28,966 INFO L231 Difference]: Finished difference. Result has 254 places, 376 transitions, 5815 flow [2024-06-03 20:34:28,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5815, PETRI_PLACES=254, PETRI_TRANSITIONS=376} [2024-06-03 20:34:28,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-03 20:34:28,967 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 376 transitions, 5815 flow [2024-06-03 20:34:28,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:28,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:28,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:28,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:34:28,968 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)] === [2024-06-03 20:34:28,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1712082809, now seen corresponding path program 3 times [2024-06-03 20:34:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:28,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283984934] [2024-06-03 20:34:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:28,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:29,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:29,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283984934] [2024-06-03 20:34:29,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283984934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:29,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:29,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:29,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029131604] [2024-06-03 20:34:29,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:29,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:29,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:29,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:29,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:29,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:29,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 376 transitions, 5815 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:29,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:29,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:29,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:29,834 INFO L124 PetriNetUnfolderBase]: 2630/4370 cut-off events. [2024-06-03 20:34:29,835 INFO L125 PetriNetUnfolderBase]: For 264405/264405 co-relation queries the response was YES. [2024-06-03 20:34:29,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30659 conditions, 4370 events. 2630/4370 cut-off events. For 264405/264405 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27366 event pairs, 517 based on Foata normal form. 2/4371 useless extension candidates. Maximal degree in co-relation 30536. Up to 4012 conditions per place. [2024-06-03 20:34:29,884 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 356 selfloop transitions, 29 changer transitions 0/391 dead transitions. [2024-06-03 20:34:29,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 391 transitions, 6659 flow [2024-06-03 20:34:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:34:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:34:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-03 20:34:29,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:34:29,885 INFO L175 Difference]: Start difference. First operand has 254 places, 376 transitions, 5815 flow. Second operand 5 states and 115 transitions. [2024-06-03 20:34:29,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 391 transitions, 6659 flow [2024-06-03 20:34:30,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 391 transitions, 6585 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-03 20:34:30,504 INFO L231 Difference]: Finished difference. Result has 257 places, 378 transitions, 5856 flow [2024-06-03 20:34:30,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5745, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5856, PETRI_PLACES=257, PETRI_TRANSITIONS=378} [2024-06-03 20:34:30,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-03 20:34:30,505 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 378 transitions, 5856 flow [2024-06-03 20:34:30,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:30,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:30,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:30,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:34:30,506 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)] === [2024-06-03 20:34:30,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1703511929, now seen corresponding path program 4 times [2024-06-03 20:34:30,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:30,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181161839] [2024-06-03 20:34:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:30,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:30,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:30,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181161839] [2024-06-03 20:34:30,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181161839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:30,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:30,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:30,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499687741] [2024-06-03 20:34:30,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:30,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:30,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:30,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:30,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 378 transitions, 5856 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:30,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:30,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:30,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:31,373 INFO L124 PetriNetUnfolderBase]: 2625/4356 cut-off events. [2024-06-03 20:34:31,373 INFO L125 PetriNetUnfolderBase]: For 260289/260291 co-relation queries the response was YES. [2024-06-03 20:34:31,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30444 conditions, 4356 events. 2625/4356 cut-off events. For 260289/260291 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27202 event pairs, 521 based on Foata normal form. 4/4359 useless extension candidates. Maximal degree in co-relation 30320. Up to 3991 conditions per place. [2024-06-03 20:34:31,424 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 355 selfloop transitions, 30 changer transitions 0/391 dead transitions. [2024-06-03 20:34:31,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 391 transitions, 6694 flow [2024-06-03 20:34:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:34:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:34:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-03 20:34:31,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-03 20:34:31,425 INFO L175 Difference]: Start difference. First operand has 257 places, 378 transitions, 5856 flow. Second operand 5 states and 112 transitions. [2024-06-03 20:34:31,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 391 transitions, 6694 flow [2024-06-03 20:34:32,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 391 transitions, 6605 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 20:34:32,100 INFO L231 Difference]: Finished difference. Result has 259 places, 380 transitions, 5878 flow [2024-06-03 20:34:32,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5878, PETRI_PLACES=259, PETRI_TRANSITIONS=380} [2024-06-03 20:34:32,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-03 20:34:32,101 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 380 transitions, 5878 flow [2024-06-03 20:34:32,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:32,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:32,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:32,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:34:32,102 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)] === [2024-06-03 20:34:32,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:32,102 INFO L85 PathProgramCache]: Analyzing trace with hash -617285971, now seen corresponding path program 1 times [2024-06-03 20:34:32,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:32,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211972274] [2024-06-03 20:34:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:32,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:32,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211972274] [2024-06-03 20:34:32,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211972274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:32,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:32,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:32,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264416254] [2024-06-03 20:34:32,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:32,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:32,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:32,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 380 transitions, 5878 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:32,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:32,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:32,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:33,301 INFO L124 PetriNetUnfolderBase]: 2939/4890 cut-off events. [2024-06-03 20:34:33,301 INFO L125 PetriNetUnfolderBase]: For 419969/419969 co-relation queries the response was YES. [2024-06-03 20:34:33,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35370 conditions, 4890 events. 2939/4890 cut-off events. For 419969/419969 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31131 event pairs, 589 based on Foata normal form. 36/4921 useless extension candidates. Maximal degree in co-relation 35245. Up to 2682 conditions per place. [2024-06-03 20:34:33,348 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 232 changer transitions 7/431 dead transitions. [2024-06-03 20:34:33,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 431 transitions, 7520 flow [2024-06-03 20:34:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-03 20:34:33,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-03 20:34:33,350 INFO L175 Difference]: Start difference. First operand has 259 places, 380 transitions, 5878 flow. Second operand 8 states and 209 transitions. [2024-06-03 20:34:33,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 431 transitions, 7520 flow [2024-06-03 20:34:34,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 431 transitions, 7429 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 20:34:34,167 INFO L231 Difference]: Finished difference. Result has 264 places, 383 transitions, 6338 flow [2024-06-03 20:34:34,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6338, PETRI_PLACES=264, PETRI_TRANSITIONS=383} [2024-06-03 20:34:34,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-03 20:34:34,168 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 383 transitions, 6338 flow [2024-06-03 20:34:34,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:34,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:34,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:34,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:34:34,169 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)] === [2024-06-03 20:34:34,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:34,169 INFO L85 PathProgramCache]: Analyzing trace with hash -351588691, now seen corresponding path program 2 times [2024-06-03 20:34:34,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:34,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541475315] [2024-06-03 20:34:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:34,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:34,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:34,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541475315] [2024-06-03 20:34:34,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541475315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:34,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:34,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:34,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423599405] [2024-06-03 20:34:34,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:34,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:34,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:34,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:34,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:34,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 383 transitions, 6338 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:34,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:34,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:34,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:35,280 INFO L124 PetriNetUnfolderBase]: 3216/5341 cut-off events. [2024-06-03 20:34:35,280 INFO L125 PetriNetUnfolderBase]: For 535782/535782 co-relation queries the response was YES. [2024-06-03 20:34:35,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41366 conditions, 5341 events. 3216/5341 cut-off events. For 535782/535782 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 34530 event pairs, 831 based on Foata normal form. 36/5372 useless extension candidates. Maximal degree in co-relation 41240. Up to 3825 conditions per place. [2024-06-03 20:34:35,344 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 221 changer transitions 4/427 dead transitions. [2024-06-03 20:34:35,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 427 transitions, 7960 flow [2024-06-03 20:34:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 20:34:35,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 20:34:35,345 INFO L175 Difference]: Start difference. First operand has 264 places, 383 transitions, 6338 flow. Second operand 8 states and 204 transitions. [2024-06-03 20:34:35,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 427 transitions, 7960 flow [2024-06-03 20:34:36,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 427 transitions, 7610 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:36,300 INFO L231 Difference]: Finished difference. Result has 268 places, 386 transitions, 6540 flow [2024-06-03 20:34:36,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5996, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6540, PETRI_PLACES=268, PETRI_TRANSITIONS=386} [2024-06-03 20:34:36,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-03 20:34:36,301 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 386 transitions, 6540 flow [2024-06-03 20:34:36,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:36,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:36,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:36,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:34:36,302 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)] === [2024-06-03 20:34:36,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1146879087, now seen corresponding path program 3 times [2024-06-03 20:34:36,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:36,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092461940] [2024-06-03 20:34:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:36,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:36,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:36,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092461940] [2024-06-03 20:34:36,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092461940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:36,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:36,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:36,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676806682] [2024-06-03 20:34:36,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:36,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:36,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:36,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:36,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 386 transitions, 6540 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:36,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:36,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:36,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:37,384 INFO L124 PetriNetUnfolderBase]: 3099/5162 cut-off events. [2024-06-03 20:34:37,384 INFO L125 PetriNetUnfolderBase]: For 469387/469387 co-relation queries the response was YES. [2024-06-03 20:34:37,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38268 conditions, 5162 events. 3099/5162 cut-off events. For 469387/469387 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33297 event pairs, 828 based on Foata normal form. 42/5199 useless extension candidates. Maximal degree in co-relation 38140. Up to 3987 conditions per place. [2024-06-03 20:34:37,444 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 216 changer transitions 3/419 dead transitions. [2024-06-03 20:34:37,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 419 transitions, 7868 flow [2024-06-03 20:34:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:34:37,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-03 20:34:37,445 INFO L175 Difference]: Start difference. First operand has 268 places, 386 transitions, 6540 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:34:37,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 419 transitions, 7868 flow [2024-06-03 20:34:38,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 419 transitions, 7511 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:38,316 INFO L231 Difference]: Finished difference. Result has 272 places, 385 transitions, 6612 flow [2024-06-03 20:34:38,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6612, PETRI_PLACES=272, PETRI_TRANSITIONS=385} [2024-06-03 20:34:38,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-03 20:34:38,317 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 385 transitions, 6612 flow [2024-06-03 20:34:38,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:38,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:38,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:38,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:34:38,318 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)] === [2024-06-03 20:34:38,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash -610793409, now seen corresponding path program 1 times [2024-06-03 20:34:38,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:38,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911686524] [2024-06-03 20:34:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:38,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:38,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:38,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911686524] [2024-06-03 20:34:38,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911686524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:38,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:38,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:34:38,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225217828] [2024-06-03 20:34:38,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:38,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:34:38,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:38,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:34:38,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:34:38,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:38,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 385 transitions, 6612 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:38,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:38,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:38,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:39,313 INFO L124 PetriNetUnfolderBase]: 3118/5211 cut-off events. [2024-06-03 20:34:39,314 INFO L125 PetriNetUnfolderBase]: For 393002/393012 co-relation queries the response was YES. [2024-06-03 20:34:39,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39182 conditions, 5211 events. 3118/5211 cut-off events. For 393002/393012 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 33854 event pairs, 831 based on Foata normal form. 6/5215 useless extension candidates. Maximal degree in co-relation 39052. Up to 4538 conditions per place. [2024-06-03 20:34:39,375 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 104 changer transitions 0/416 dead transitions. [2024-06-03 20:34:39,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 416 transitions, 8128 flow [2024-06-03 20:34:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:34:39,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-03 20:34:39,376 INFO L175 Difference]: Start difference. First operand has 272 places, 385 transitions, 6612 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:34:39,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 416 transitions, 8128 flow [2024-06-03 20:34:40,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 416 transitions, 7672 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:34:40,326 INFO L231 Difference]: Finished difference. Result has 271 places, 397 transitions, 6612 flow [2024-06-03 20:34:40,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6612, PETRI_PLACES=271, PETRI_TRANSITIONS=397} [2024-06-03 20:34:40,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-03 20:34:40,327 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 397 transitions, 6612 flow [2024-06-03 20:34:40,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:40,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:40,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:40,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:34:40,327 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)] === [2024-06-03 20:34:40,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash -198502095, now seen corresponding path program 2 times [2024-06-03 20:34:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:40,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904418919] [2024-06-03 20:34:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:40,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:40,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:40,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904418919] [2024-06-03 20:34:40,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904418919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:40,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:40,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:40,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939234081] [2024-06-03 20:34:40,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:40,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:40,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:40,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:40,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 397 transitions, 6612 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:40,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:40,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:41,436 INFO L124 PetriNetUnfolderBase]: 3115/5194 cut-off events. [2024-06-03 20:34:41,436 INFO L125 PetriNetUnfolderBase]: For 397662/397662 co-relation queries the response was YES. [2024-06-03 20:34:41,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38749 conditions, 5194 events. 3115/5194 cut-off events. For 397662/397662 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 33625 event pairs, 793 based on Foata normal form. 1/5191 useless extension candidates. Maximal degree in co-relation 38618. Up to 4535 conditions per place. [2024-06-03 20:34:41,500 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 301 selfloop transitions, 123 changer transitions 0/430 dead transitions. [2024-06-03 20:34:41,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 430 transitions, 7956 flow [2024-06-03 20:34:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:34:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:34:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-03 20:34:41,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:34:41,501 INFO L175 Difference]: Start difference. First operand has 271 places, 397 transitions, 6612 flow. Second operand 9 states and 207 transitions. [2024-06-03 20:34:41,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 430 transitions, 7956 flow [2024-06-03 20:34:42,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 430 transitions, 7810 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 20:34:42,568 INFO L231 Difference]: Finished difference. Result has 278 places, 397 transitions, 6718 flow [2024-06-03 20:34:42,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6466, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6718, PETRI_PLACES=278, PETRI_TRANSITIONS=397} [2024-06-03 20:34:42,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-03 20:34:42,568 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 397 transitions, 6718 flow [2024-06-03 20:34:42,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:42,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:42,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:42,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:34:42,569 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)] === [2024-06-03 20:34:42,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash 248572181, now seen corresponding path program 3 times [2024-06-03 20:34:42,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:42,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644867029] [2024-06-03 20:34:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:42,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:42,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:42,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644867029] [2024-06-03 20:34:42,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644867029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:42,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:42,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:42,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111039943] [2024-06-03 20:34:42,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:42,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:42,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:42,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:42,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:42,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:42,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 397 transitions, 6718 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:42,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:42,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:42,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:43,718 INFO L124 PetriNetUnfolderBase]: 3120/5199 cut-off events. [2024-06-03 20:34:43,719 INFO L125 PetriNetUnfolderBase]: For 410064/410064 co-relation queries the response was YES. [2024-06-03 20:34:43,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39097 conditions, 5199 events. 3120/5199 cut-off events. For 410064/410064 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33717 event pairs, 807 based on Foata normal form. 1/5195 useless extension candidates. Maximal degree in co-relation 38964. Up to 4541 conditions per place. [2024-06-03 20:34:43,781 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 118 changer transitions 0/425 dead transitions. [2024-06-03 20:34:43,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 425 transitions, 7951 flow [2024-06-03 20:34:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:34:43,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 20:34:43,782 INFO L175 Difference]: Start difference. First operand has 278 places, 397 transitions, 6718 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:34:43,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 425 transitions, 7951 flow [2024-06-03 20:34:44,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 425 transitions, 7560 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 20:34:44,929 INFO L231 Difference]: Finished difference. Result has 277 places, 400 transitions, 6622 flow [2024-06-03 20:34:44,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6339, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6622, PETRI_PLACES=277, PETRI_TRANSITIONS=400} [2024-06-03 20:34:44,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-03 20:34:44,929 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 400 transitions, 6622 flow [2024-06-03 20:34:44,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:44,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:44,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:44,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:34:44,930 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)] === [2024-06-03 20:34:44,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash -576331329, now seen corresponding path program 4 times [2024-06-03 20:34:44,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:44,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055900675] [2024-06-03 20:34:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:44,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:45,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:45,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055900675] [2024-06-03 20:34:45,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055900675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:45,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:45,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:34:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436889715] [2024-06-03 20:34:45,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:45,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:34:45,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:34:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:34:45,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 400 transitions, 6622 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:45,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:45,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:45,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:45,922 INFO L124 PetriNetUnfolderBase]: 3117/5213 cut-off events. [2024-06-03 20:34:45,922 INFO L125 PetriNetUnfolderBase]: For 416519/416529 co-relation queries the response was YES. [2024-06-03 20:34:45,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39033 conditions, 5213 events. 3117/5213 cut-off events. For 416519/416529 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33910 event pairs, 830 based on Foata normal form. 6/5217 useless extension candidates. Maximal degree in co-relation 38901. Up to 4538 conditions per place. [2024-06-03 20:34:45,985 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 103 changer transitions 0/415 dead transitions. [2024-06-03 20:34:45,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 415 transitions, 7760 flow [2024-06-03 20:34:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-03 20:34:45,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 20:34:45,988 INFO L175 Difference]: Start difference. First operand has 277 places, 400 transitions, 6622 flow. Second operand 6 states and 140 transitions. [2024-06-03 20:34:45,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 415 transitions, 7760 flow [2024-06-03 20:34:46,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 415 transitions, 7595 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:46,972 INFO L231 Difference]: Finished difference. Result has 279 places, 400 transitions, 6669 flow [2024-06-03 20:34:46,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6669, PETRI_PLACES=279, PETRI_TRANSITIONS=400} [2024-06-03 20:34:46,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-03 20:34:46,973 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 400 transitions, 6669 flow [2024-06-03 20:34:46,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:46,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:46,973 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] [2024-06-03 20:34:46,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:34:46,974 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)] === [2024-06-03 20:34:46,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash 869953887, now seen corresponding path program 1 times [2024-06-03 20:34:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:46,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182091286] [2024-06-03 20:34:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:47,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:47,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182091286] [2024-06-03 20:34:47,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182091286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:47,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:47,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:47,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302290647] [2024-06-03 20:34:47,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:47,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:47,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:47,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:47,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:47,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 400 transitions, 6669 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:47,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:47,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:47,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:48,041 INFO L124 PetriNetUnfolderBase]: 3127/5212 cut-off events. [2024-06-03 20:34:48,042 INFO L125 PetriNetUnfolderBase]: For 430416/430416 co-relation queries the response was YES. [2024-06-03 20:34:48,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39296 conditions, 5212 events. 3127/5212 cut-off events. For 430416/430416 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 33786 event pairs, 834 based on Foata normal form. 2/5209 useless extension candidates. Maximal degree in co-relation 39162. Up to 4203 conditions per place. [2024-06-03 20:34:48,102 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 215 changer transitions 0/427 dead transitions. [2024-06-03 20:34:48,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 427 transitions, 7928 flow [2024-06-03 20:34:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:34:48,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 20:34:48,103 INFO L175 Difference]: Start difference. First operand has 279 places, 400 transitions, 6669 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:34:48,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 427 transitions, 7928 flow [2024-06-03 20:34:49,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 427 transitions, 7722 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:49,192 INFO L231 Difference]: Finished difference. Result has 283 places, 404 transitions, 6975 flow [2024-06-03 20:34:49,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6463, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6975, PETRI_PLACES=283, PETRI_TRANSITIONS=404} [2024-06-03 20:34:49,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-03 20:34:49,193 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 404 transitions, 6975 flow [2024-06-03 20:34:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:49,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:49,193 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] [2024-06-03 20:34:49,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:34:49,194 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)] === [2024-06-03 20:34:49,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1664166153, now seen corresponding path program 2 times [2024-06-03 20:34:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:49,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366351549] [2024-06-03 20:34:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:49,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:49,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:49,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366351549] [2024-06-03 20:34:49,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366351549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:49,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:49,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:49,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956617819] [2024-06-03 20:34:49,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:49,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:49,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:49,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:49,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:49,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:49,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 404 transitions, 6975 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:49,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:49,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:49,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:50,411 INFO L124 PetriNetUnfolderBase]: 3137/5230 cut-off events. [2024-06-03 20:34:50,411 INFO L125 PetriNetUnfolderBase]: For 443759/443759 co-relation queries the response was YES. [2024-06-03 20:34:50,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39883 conditions, 5230 events. 3137/5230 cut-off events. For 443759/443759 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33961 event pairs, 832 based on Foata normal form. 2/5227 useless extension candidates. Maximal degree in co-relation 39749. Up to 4213 conditions per place. [2024-06-03 20:34:50,469 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 205 selfloop transitions, 220 changer transitions 0/431 dead transitions. [2024-06-03 20:34:50,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 431 transitions, 8254 flow [2024-06-03 20:34:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:34:50,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 20:34:50,471 INFO L175 Difference]: Start difference. First operand has 283 places, 404 transitions, 6975 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:34:50,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 431 transitions, 8254 flow [2024-06-03 20:34:51,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 431 transitions, 7778 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:51,591 INFO L231 Difference]: Finished difference. Result has 285 places, 408 transitions, 7029 flow [2024-06-03 20:34:51,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7029, PETRI_PLACES=285, PETRI_TRANSITIONS=408} [2024-06-03 20:34:51,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-03 20:34:51,592 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 408 transitions, 7029 flow [2024-06-03 20:34:51,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:51,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:51,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:51,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:34:51,593 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)] === [2024-06-03 20:34:51,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1784867829, now seen corresponding path program 5 times [2024-06-03 20:34:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:51,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059549595] [2024-06-03 20:34:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:51,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:51,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059549595] [2024-06-03 20:34:51,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059549595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:51,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:51,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:51,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807827125] [2024-06-03 20:34:51,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:51,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:51,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:51,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:51,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:51,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 408 transitions, 7029 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:51,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:51,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:51,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:52,664 INFO L124 PetriNetUnfolderBase]: 3134/5233 cut-off events. [2024-06-03 20:34:52,665 INFO L125 PetriNetUnfolderBase]: For 448746/448746 co-relation queries the response was YES. [2024-06-03 20:34:52,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39891 conditions, 5233 events. 3134/5233 cut-off events. For 448746/448746 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34079 event pairs, 801 based on Foata normal form. 1/5229 useless extension candidates. Maximal degree in co-relation 39756. Up to 4563 conditions per place. [2024-06-03 20:34:52,727 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 314 selfloop transitions, 108 changer transitions 0/428 dead transitions. [2024-06-03 20:34:52,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 428 transitions, 8365 flow [2024-06-03 20:34:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:34:52,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:34:52,730 INFO L175 Difference]: Start difference. First operand has 285 places, 408 transitions, 7029 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:34:52,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 428 transitions, 8365 flow [2024-06-03 20:34:53,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 428 transitions, 7882 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:53,955 INFO L231 Difference]: Finished difference. Result has 286 places, 408 transitions, 6770 flow [2024-06-03 20:34:53,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6770, PETRI_PLACES=286, PETRI_TRANSITIONS=408} [2024-06-03 20:34:53,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-03 20:34:53,956 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 408 transitions, 6770 flow [2024-06-03 20:34:53,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:53,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:53,957 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] [2024-06-03 20:34:53,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:34:53,957 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)] === [2024-06-03 20:34:53,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash -243506703, now seen corresponding path program 6 times [2024-06-03 20:34:53,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:53,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320584678] [2024-06-03 20:34:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:54,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:54,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320584678] [2024-06-03 20:34:54,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320584678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:54,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:54,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:54,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576219861] [2024-06-03 20:34:54,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:54,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:54,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:54,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:54,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:54,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:54,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 408 transitions, 6770 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:54,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:54,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:54,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:55,032 INFO L124 PetriNetUnfolderBase]: 3131/5227 cut-off events. [2024-06-03 20:34:55,032 INFO L125 PetriNetUnfolderBase]: For 455184/455184 co-relation queries the response was YES. [2024-06-03 20:34:55,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39524 conditions, 5227 events. 3131/5227 cut-off events. For 455184/455184 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33956 event pairs, 801 based on Foata normal form. 1/5223 useless extension candidates. Maximal degree in co-relation 39388. Up to 4560 conditions per place. [2024-06-03 20:34:55,098 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 310 selfloop transitions, 113 changer transitions 0/429 dead transitions. [2024-06-03 20:34:55,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 429 transitions, 7966 flow [2024-06-03 20:34:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:34:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:34:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 20:34:55,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-03 20:34:55,099 INFO L175 Difference]: Start difference. First operand has 286 places, 408 transitions, 6770 flow. Second operand 9 states and 199 transitions. [2024-06-03 20:34:55,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 429 transitions, 7966 flow [2024-06-03 20:34:56,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 429 transitions, 7778 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:56,261 INFO L231 Difference]: Finished difference. Result has 291 places, 408 transitions, 6814 flow [2024-06-03 20:34:56,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6582, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6814, PETRI_PLACES=291, PETRI_TRANSITIONS=408} [2024-06-03 20:34:56,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-03 20:34:56,262 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 408 transitions, 6814 flow [2024-06-03 20:34:56,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:56,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:56,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:56,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:34:56,263 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)] === [2024-06-03 20:34:56,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash -44193381, now seen corresponding path program 3 times [2024-06-03 20:34:56,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:56,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438433970] [2024-06-03 20:34:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:56,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:56,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:56,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438433970] [2024-06-03 20:34:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438433970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:56,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:56,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:56,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266041450] [2024-06-03 20:34:56,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:56,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:56,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:56,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:56,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:56,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:56,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 408 transitions, 6814 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:56,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:56,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:56,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:57,444 INFO L124 PetriNetUnfolderBase]: 3141/5237 cut-off events. [2024-06-03 20:34:57,444 INFO L125 PetriNetUnfolderBase]: For 470223/470223 co-relation queries the response was YES. [2024-06-03 20:34:57,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39849 conditions, 5237 events. 3141/5237 cut-off events. For 470223/470223 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33991 event pairs, 838 based on Foata normal form. 2/5234 useless extension candidates. Maximal degree in co-relation 39712. Up to 4219 conditions per place. [2024-06-03 20:34:57,501 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 208 changer transitions 0/432 dead transitions. [2024-06-03 20:34:57,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 432 transitions, 8095 flow [2024-06-03 20:34:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:34:57,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:34:57,502 INFO L175 Difference]: Start difference. First operand has 291 places, 408 transitions, 6814 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:34:57,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 432 transitions, 8095 flow [2024-06-03 20:34:58,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 432 transitions, 7803 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:34:58,722 INFO L231 Difference]: Finished difference. Result has 290 places, 412 transitions, 7024 flow [2024-06-03 20:34:58,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7024, PETRI_PLACES=290, PETRI_TRANSITIONS=412} [2024-06-03 20:34:58,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-03 20:34:58,723 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 412 transitions, 7024 flow [2024-06-03 20:34:58,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:58,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:58,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:58,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:34:58,723 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)] === [2024-06-03 20:34:58,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:58,724 INFO L85 PathProgramCache]: Analyzing trace with hash 88865033, now seen corresponding path program 4 times [2024-06-03 20:34:58,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:58,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168257997] [2024-06-03 20:34:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:58,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:58,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:58,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168257997] [2024-06-03 20:34:58,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168257997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:58,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:58,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:58,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935472286] [2024-06-03 20:34:58,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:58,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:58,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:58,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:58,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:58,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:58,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 412 transitions, 7024 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:34:58,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:58,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:58,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:59,821 INFO L124 PetriNetUnfolderBase]: 3167/5289 cut-off events. [2024-06-03 20:34:59,822 INFO L125 PetriNetUnfolderBase]: For 487983/487983 co-relation queries the response was YES. [2024-06-03 20:34:59,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40855 conditions, 5289 events. 3167/5289 cut-off events. For 487983/487983 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34472 event pairs, 824 based on Foata normal form. 2/5286 useless extension candidates. Maximal degree in co-relation 40718. Up to 4244 conditions per place. [2024-06-03 20:34:59,886 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 219 changer transitions 0/445 dead transitions. [2024-06-03 20:34:59,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 445 transitions, 8784 flow [2024-06-03 20:34:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:34:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:34:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:34:59,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-03 20:34:59,887 INFO L175 Difference]: Start difference. First operand has 290 places, 412 transitions, 7024 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:34:59,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 445 transitions, 8784 flow [2024-06-03 20:35:01,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 445 transitions, 8438 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 20:35:01,240 INFO L231 Difference]: Finished difference. Result has 294 places, 422 transitions, 7337 flow [2024-06-03 20:35:01,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6686, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7337, PETRI_PLACES=294, PETRI_TRANSITIONS=422} [2024-06-03 20:35:01,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-03 20:35:01,241 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 422 transitions, 7337 flow [2024-06-03 20:35:01,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:01,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:01,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:01,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:35:01,242 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)] === [2024-06-03 20:35:01,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash 603365557, now seen corresponding path program 5 times [2024-06-03 20:35:01,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:01,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454726230] [2024-06-03 20:35:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:01,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:01,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:01,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454726230] [2024-06-03 20:35:01,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454726230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:01,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:01,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:01,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560756756] [2024-06-03 20:35:01,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:01,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:01,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:01,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:01,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:01,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 422 transitions, 7337 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:01,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:01,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:01,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:02,372 INFO L124 PetriNetUnfolderBase]: 3177/5302 cut-off events. [2024-06-03 20:35:02,372 INFO L125 PetriNetUnfolderBase]: For 502854/502854 co-relation queries the response was YES. [2024-06-03 20:35:02,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41215 conditions, 5302 events. 3177/5302 cut-off events. For 502854/502854 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34587 event pairs, 838 based on Foata normal form. 2/5299 useless extension candidates. Maximal degree in co-relation 41076. Up to 4254 conditions per place. [2024-06-03 20:35:02,437 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 221 changer transitions 0/450 dead transitions. [2024-06-03 20:35:02,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 450 transitions, 8879 flow [2024-06-03 20:35:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:35:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:35:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-03 20:35:02,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 20:35:02,438 INFO L175 Difference]: Start difference. First operand has 294 places, 422 transitions, 7337 flow. Second operand 9 states and 205 transitions. [2024-06-03 20:35:02,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 450 transitions, 8879 flow [2024-06-03 20:35:04,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 450 transitions, 8344 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-03 20:35:04,016 INFO L231 Difference]: Finished difference. Result has 298 places, 427 transitions, 7359 flow [2024-06-03 20:35:04,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7359, PETRI_PLACES=298, PETRI_TRANSITIONS=427} [2024-06-03 20:35:04,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-03 20:35:04,017 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 427 transitions, 7359 flow [2024-06-03 20:35:04,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:04,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:04,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:04,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:35:04,018 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)] === [2024-06-03 20:35:04,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:04,018 INFO L85 PathProgramCache]: Analyzing trace with hash -36964863, now seen corresponding path program 4 times [2024-06-03 20:35:04,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:04,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687170088] [2024-06-03 20:35:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:04,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:04,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:04,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687170088] [2024-06-03 20:35:04,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687170088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:04,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:04,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:04,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911971608] [2024-06-03 20:35:04,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:04,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:04,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:04,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:04,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:04,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:04,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 427 transitions, 7359 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:04,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:04,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:04,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:05,301 INFO L124 PetriNetUnfolderBase]: 3309/5508 cut-off events. [2024-06-03 20:35:05,301 INFO L125 PetriNetUnfolderBase]: For 645596/645596 co-relation queries the response was YES. [2024-06-03 20:35:05,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42038 conditions, 5508 events. 3309/5508 cut-off events. For 645596/645596 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36118 event pairs, 890 based on Foata normal form. 42/5545 useless extension candidates. Maximal degree in co-relation 41898. Up to 4272 conditions per place. [2024-06-03 20:35:05,362 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 222 changer transitions 3/455 dead transitions. [2024-06-03 20:35:05,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 455 transitions, 8713 flow [2024-06-03 20:35:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:35:05,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:35:05,363 INFO L175 Difference]: Start difference. First operand has 298 places, 427 transitions, 7359 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:35:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 455 transitions, 8713 flow [2024-06-03 20:35:06,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 455 transitions, 8247 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:06,759 INFO L231 Difference]: Finished difference. Result has 299 places, 428 transitions, 7395 flow [2024-06-03 20:35:06,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6893, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7395, PETRI_PLACES=299, PETRI_TRANSITIONS=428} [2024-06-03 20:35:06,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-03 20:35:06,759 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 428 transitions, 7395 flow [2024-06-03 20:35:06,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:06,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:06,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:06,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:35:06,760 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)] === [2024-06-03 20:35:06,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:06,760 INFO L85 PathProgramCache]: Analyzing trace with hash -48006753, now seen corresponding path program 5 times [2024-06-03 20:35:06,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:06,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948450675] [2024-06-03 20:35:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:06,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:06,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:06,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948450675] [2024-06-03 20:35:06,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948450675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:06,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:06,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:06,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282188373] [2024-06-03 20:35:06,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:06,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:06,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:06,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:06,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 428 transitions, 7395 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:06,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:06,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:06,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:07,945 INFO L124 PetriNetUnfolderBase]: 3431/5736 cut-off events. [2024-06-03 20:35:07,945 INFO L125 PetriNetUnfolderBase]: For 659593/659593 co-relation queries the response was YES. [2024-06-03 20:35:07,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43364 conditions, 5736 events. 3431/5736 cut-off events. For 659593/659593 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 38015 event pairs, 950 based on Foata normal form. 42/5773 useless extension candidates. Maximal degree in co-relation 43223. Up to 4474 conditions per place. [2024-06-03 20:35:08,014 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 225 selfloop transitions, 222 changer transitions 3/456 dead transitions. [2024-06-03 20:35:08,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 456 transitions, 8759 flow [2024-06-03 20:35:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:35:08,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:35:08,016 INFO L175 Difference]: Start difference. First operand has 299 places, 428 transitions, 7395 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:35:08,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 456 transitions, 8759 flow [2024-06-03 20:35:09,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 456 transitions, 8285 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:35:09,975 INFO L231 Difference]: Finished difference. Result has 301 places, 429 transitions, 7427 flow [2024-06-03 20:35:09,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7427, PETRI_PLACES=301, PETRI_TRANSITIONS=429} [2024-06-03 20:35:09,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-03 20:35:09,976 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 429 transitions, 7427 flow [2024-06-03 20:35:09,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:09,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:09,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:09,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:35:09,976 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)] === [2024-06-03 20:35:09,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:09,977 INFO L85 PathProgramCache]: Analyzing trace with hash 592191235, now seen corresponding path program 6 times [2024-06-03 20:35:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:09,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861882084] [2024-06-03 20:35:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:09,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:10,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:10,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861882084] [2024-06-03 20:35:10,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861882084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:10,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:10,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:10,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122252639] [2024-06-03 20:35:10,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:10,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:10,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:10,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:10,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:10,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 429 transitions, 7427 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:10,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:10,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:10,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:11,324 INFO L124 PetriNetUnfolderBase]: 3529/5900 cut-off events. [2024-06-03 20:35:11,325 INFO L125 PetriNetUnfolderBase]: For 657993/657993 co-relation queries the response was YES. [2024-06-03 20:35:11,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44177 conditions, 5900 events. 3529/5900 cut-off events. For 657993/657993 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39276 event pairs, 934 based on Foata normal form. 36/5931 useless extension candidates. Maximal degree in co-relation 44035. Up to 4246 conditions per place. [2024-06-03 20:35:11,397 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 227 changer transitions 6/463 dead transitions. [2024-06-03 20:35:11,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 463 transitions, 8847 flow [2024-06-03 20:35:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:35:11,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:35:11,398 INFO L175 Difference]: Start difference. First operand has 301 places, 429 transitions, 7427 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:35:11,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 463 transitions, 8847 flow [2024-06-03 20:35:13,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 463 transitions, 8369 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:35:13,387 INFO L231 Difference]: Finished difference. Result has 303 places, 430 transitions, 7461 flow [2024-06-03 20:35:13,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7461, PETRI_PLACES=303, PETRI_TRANSITIONS=430} [2024-06-03 20:35:13,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-03 20:35:13,388 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 430 transitions, 7461 flow [2024-06-03 20:35:13,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:13,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:13,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:13,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:35:13,389 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)] === [2024-06-03 20:35:13,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:13,389 INFO L85 PathProgramCache]: Analyzing trace with hash 603642139, now seen corresponding path program 1 times [2024-06-03 20:35:13,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:13,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911609264] [2024-06-03 20:35:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:13,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:13,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:13,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911609264] [2024-06-03 20:35:13,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911609264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:13,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:13,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:13,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933884406] [2024-06-03 20:35:13,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:13,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:13,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:13,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:13,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:13,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 430 transitions, 7461 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:13,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:13,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:13,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:14,713 INFO L124 PetriNetUnfolderBase]: 3741/6286 cut-off events. [2024-06-03 20:35:14,714 INFO L125 PetriNetUnfolderBase]: For 732345/732345 co-relation queries the response was YES. [2024-06-03 20:35:14,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47838 conditions, 6286 events. 3741/6286 cut-off events. For 732345/732345 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42663 event pairs, 988 based on Foata normal form. 36/6317 useless extension candidates. Maximal degree in co-relation 47695. Up to 4202 conditions per place. [2024-06-03 20:35:14,791 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 220 changer transitions 0/467 dead transitions. [2024-06-03 20:35:14,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 467 transitions, 9109 flow [2024-06-03 20:35:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:35:14,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:35:14,792 INFO L175 Difference]: Start difference. First operand has 303 places, 430 transitions, 7461 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:35:14,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 467 transitions, 9109 flow [2024-06-03 20:35:17,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 467 transitions, 8616 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:35:17,031 INFO L231 Difference]: Finished difference. Result has 306 places, 434 transitions, 7558 flow [2024-06-03 20:35:17,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6968, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7558, PETRI_PLACES=306, PETRI_TRANSITIONS=434} [2024-06-03 20:35:17,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-03 20:35:17,032 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 434 transitions, 7558 flow [2024-06-03 20:35:17,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:17,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:17,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:17,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:35:17,032 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)] === [2024-06-03 20:35:17,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash 751256655, now seen corresponding path program 6 times [2024-06-03 20:35:17,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:17,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615597014] [2024-06-03 20:35:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:17,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:17,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:17,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615597014] [2024-06-03 20:35:17,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615597014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:17,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:17,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:17,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850743915] [2024-06-03 20:35:17,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:17,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:17,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:17,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 434 transitions, 7558 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:17,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:17,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:17,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:18,330 INFO L124 PetriNetUnfolderBase]: 3738/6283 cut-off events. [2024-06-03 20:35:18,330 INFO L125 PetriNetUnfolderBase]: For 632905/632913 co-relation queries the response was YES. [2024-06-03 20:35:18,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47912 conditions, 6283 events. 3738/6283 cut-off events. For 632905/632913 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42875 event pairs, 1068 based on Foata normal form. 4/6282 useless extension candidates. Maximal degree in co-relation 47767. Up to 5188 conditions per place. [2024-06-03 20:35:18,421 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 244 changer transitions 0/457 dead transitions. [2024-06-03 20:35:18,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 457 transitions, 9202 flow [2024-06-03 20:35:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:35:18,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:35:18,422 INFO L175 Difference]: Start difference. First operand has 306 places, 434 transitions, 7558 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:35:18,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 457 transitions, 9202 flow [2024-06-03 20:35:20,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 457 transitions, 8881 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 20:35:20,319 INFO L231 Difference]: Finished difference. Result has 310 places, 435 transitions, 7757 flow [2024-06-03 20:35:20,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7237, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7757, PETRI_PLACES=310, PETRI_TRANSITIONS=435} [2024-06-03 20:35:20,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-03 20:35:20,320 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 435 transitions, 7757 flow [2024-06-03 20:35:20,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:20,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:20,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:20,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:35:20,321 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)] === [2024-06-03 20:35:20,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1464969627, now seen corresponding path program 7 times [2024-06-03 20:35:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:20,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412699935] [2024-06-03 20:35:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:20,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:20,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412699935] [2024-06-03 20:35:20,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412699935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:20,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:20,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418690740] [2024-06-03 20:35:20,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:20,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:20,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 435 transitions, 7757 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:20,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:20,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:20,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:21,629 INFO L124 PetriNetUnfolderBase]: 3735/6277 cut-off events. [2024-06-03 20:35:21,630 INFO L125 PetriNetUnfolderBase]: For 638201/638209 co-relation queries the response was YES. [2024-06-03 20:35:21,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48081 conditions, 6277 events. 3735/6277 cut-off events. For 638201/638209 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42800 event pairs, 1068 based on Foata normal form. 4/6276 useless extension candidates. Maximal degree in co-relation 47934. Up to 5186 conditions per place. [2024-06-03 20:35:21,711 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 244 changer transitions 0/456 dead transitions. [2024-06-03 20:35:21,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 456 transitions, 9211 flow [2024-06-03 20:35:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:35:21,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:35:21,713 INFO L175 Difference]: Start difference. First operand has 310 places, 435 transitions, 7757 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:35:21,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 456 transitions, 9211 flow [2024-06-03 20:35:23,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 456 transitions, 8584 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:35:23,327 INFO L231 Difference]: Finished difference. Result has 312 places, 435 transitions, 7624 flow [2024-06-03 20:35:23,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7130, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7624, PETRI_PLACES=312, PETRI_TRANSITIONS=435} [2024-06-03 20:35:23,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-03 20:35:23,328 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 435 transitions, 7624 flow [2024-06-03 20:35:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:23,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:23,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:23,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:35:23,329 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)] === [2024-06-03 20:35:23,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:23,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1634032055, now seen corresponding path program 8 times [2024-06-03 20:35:23,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:23,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238159249] [2024-06-03 20:35:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:23,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:23,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:23,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238159249] [2024-06-03 20:35:23,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238159249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:23,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:23,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76892948] [2024-06-03 20:35:23,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:23,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:23,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 435 transitions, 7624 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:23,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:23,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:23,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:24,634 INFO L124 PetriNetUnfolderBase]: 3740/6284 cut-off events. [2024-06-03 20:35:24,634 INFO L125 PetriNetUnfolderBase]: For 650933/650941 co-relation queries the response was YES. [2024-06-03 20:35:24,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48204 conditions, 6284 events. 3740/6284 cut-off events. For 650933/650941 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42879 event pairs, 1068 based on Foata normal form. 4/6283 useless extension candidates. Maximal degree in co-relation 48056. Up to 5190 conditions per place. [2024-06-03 20:35:24,714 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 257 changer transitions 0/459 dead transitions. [2024-06-03 20:35:24,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 459 transitions, 9157 flow [2024-06-03 20:35:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:35:24,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 20:35:24,715 INFO L175 Difference]: Start difference. First operand has 312 places, 435 transitions, 7624 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:35:24,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 459 transitions, 9157 flow [2024-06-03 20:35:26,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 459 transitions, 8657 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:26,604 INFO L231 Difference]: Finished difference. Result has 313 places, 438 transitions, 7711 flow [2024-06-03 20:35:26,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7130, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7711, PETRI_PLACES=313, PETRI_TRANSITIONS=438} [2024-06-03 20:35:26,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-03 20:35:26,605 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 438 transitions, 7711 flow [2024-06-03 20:35:26,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:26,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:26,605 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] [2024-06-03 20:35:26,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:35:26,605 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)] === [2024-06-03 20:35:26,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash 453798465, now seen corresponding path program 7 times [2024-06-03 20:35:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:26,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853530636] [2024-06-03 20:35:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:26,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:26,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853530636] [2024-06-03 20:35:26,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853530636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:26,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:26,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:35:26,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478281505] [2024-06-03 20:35:26,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:26,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:35:26,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:26,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:35:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:35:26,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:26,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 438 transitions, 7711 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:35:26,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:26,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:26,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:27,897 INFO L124 PetriNetUnfolderBase]: 3737/6316 cut-off events. [2024-06-03 20:35:27,897 INFO L125 PetriNetUnfolderBase]: For 660602/660612 co-relation queries the response was YES. [2024-06-03 20:35:27,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48334 conditions, 6316 events. 3737/6316 cut-off events. For 660602/660612 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43375 event pairs, 1092 based on Foata normal form. 6/6320 useless extension candidates. Maximal degree in co-relation 48185. Up to 5556 conditions per place. [2024-06-03 20:35:27,984 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 345 selfloop transitions, 102 changer transitions 0/453 dead transitions. [2024-06-03 20:35:27,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 453 transitions, 8813 flow [2024-06-03 20:35:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:35:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:35:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 20:35:27,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 20:35:27,985 INFO L175 Difference]: Start difference. First operand has 313 places, 438 transitions, 7711 flow. Second operand 7 states and 156 transitions. [2024-06-03 20:35:27,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 453 transitions, 8813 flow [2024-06-03 20:35:30,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 453 transitions, 8380 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:35:30,279 INFO L231 Difference]: Finished difference. Result has 315 places, 438 transitions, 7488 flow [2024-06-03 20:35:30,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7278, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7488, PETRI_PLACES=315, PETRI_TRANSITIONS=438} [2024-06-03 20:35:30,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-03 20:35:30,280 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 438 transitions, 7488 flow [2024-06-03 20:35:30,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:35:30,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:30,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:30,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:35:30,281 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)] === [2024-06-03 20:35:30,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:30,281 INFO L85 PathProgramCache]: Analyzing trace with hash -483414125, now seen corresponding path program 9 times [2024-06-03 20:35:30,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:30,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076678362] [2024-06-03 20:35:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:30,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:30,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:30,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076678362] [2024-06-03 20:35:30,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076678362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:30,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:30,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:30,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806112157] [2024-06-03 20:35:30,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:30,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:30,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:30,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:30,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:30,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:30,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 438 transitions, 7488 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:30,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:30,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:30,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:31,582 INFO L124 PetriNetUnfolderBase]: 3734/6284 cut-off events. [2024-06-03 20:35:31,582 INFO L125 PetriNetUnfolderBase]: For 669022/669030 co-relation queries the response was YES. [2024-06-03 20:35:31,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47893 conditions, 6284 events. 3734/6284 cut-off events. For 669022/669030 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42949 event pairs, 1079 based on Foata normal form. 4/6283 useless extension candidates. Maximal degree in co-relation 47743. Up to 5186 conditions per place. [2024-06-03 20:35:31,662 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 257 changer transitions 0/459 dead transitions. [2024-06-03 20:35:31,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 459 transitions, 8966 flow [2024-06-03 20:35:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:35:31,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 20:35:31,664 INFO L175 Difference]: Start difference. First operand has 315 places, 438 transitions, 7488 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:35:31,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 459 transitions, 8966 flow [2024-06-03 20:35:33,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 459 transitions, 8802 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:35:33,739 INFO L231 Difference]: Finished difference. Result has 319 places, 438 transitions, 7844 flow [2024-06-03 20:35:33,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7324, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7844, PETRI_PLACES=319, PETRI_TRANSITIONS=438} [2024-06-03 20:35:33,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-03 20:35:33,740 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 438 transitions, 7844 flow [2024-06-03 20:35:33,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:33,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:33,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:35:33,741 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)] === [2024-06-03 20:35:33,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:33,741 INFO L85 PathProgramCache]: Analyzing trace with hash 893141087, now seen corresponding path program 8 times [2024-06-03 20:35:33,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:33,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384908678] [2024-06-03 20:35:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:33,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:33,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:33,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384908678] [2024-06-03 20:35:33,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384908678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:33,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:33,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:35:33,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875645931] [2024-06-03 20:35:33,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:33,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:35:33,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:33,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:35:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:35:33,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:33,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 438 transitions, 7844 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:35:33,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:33,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:33,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:34,998 INFO L124 PetriNetUnfolderBase]: 3736/6309 cut-off events. [2024-06-03 20:35:34,998 INFO L125 PetriNetUnfolderBase]: For 684268/684270 co-relation queries the response was YES. [2024-06-03 20:35:35,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48524 conditions, 6309 events. 3736/6309 cut-off events. For 684268/684270 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43197 event pairs, 1032 based on Foata normal form. 4/6312 useless extension candidates. Maximal degree in co-relation 48372. Up to 5575 conditions per place. [2024-06-03 20:35:35,078 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 98 changer transitions 0/467 dead transitions. [2024-06-03 20:35:35,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 467 transitions, 9089 flow [2024-06-03 20:35:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:35:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:35:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 20:35:35,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-03 20:35:35,079 INFO L175 Difference]: Start difference. First operand has 319 places, 438 transitions, 7844 flow. Second operand 6 states and 156 transitions. [2024-06-03 20:35:35,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 467 transitions, 9089 flow [2024-06-03 20:35:36,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 467 transitions, 8286 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-03 20:35:36,818 INFO L231 Difference]: Finished difference. Result has 316 places, 441 transitions, 7332 flow [2024-06-03 20:35:36,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7047, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7332, PETRI_PLACES=316, PETRI_TRANSITIONS=441} [2024-06-03 20:35:36,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-03 20:35:36,819 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 441 transitions, 7332 flow [2024-06-03 20:35:36,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:35:36,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:36,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:36,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:35:36,819 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)] === [2024-06-03 20:35:36,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1344870543, now seen corresponding path program 10 times [2024-06-03 20:35:36,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:36,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335097356] [2024-06-03 20:35:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:36,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:37,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:37,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335097356] [2024-06-03 20:35:37,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335097356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:37,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:37,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:37,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229583485] [2024-06-03 20:35:37,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:37,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:37,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:37,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:37,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 441 transitions, 7332 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:37,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:37,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:37,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:38,286 INFO L124 PetriNetUnfolderBase]: 3733/6304 cut-off events. [2024-06-03 20:35:38,286 INFO L125 PetriNetUnfolderBase]: For 687174/687174 co-relation queries the response was YES. [2024-06-03 20:35:38,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47766 conditions, 6304 events. 3733/6304 cut-off events. For 687174/687174 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43150 event pairs, 1022 based on Foata normal form. 1/6304 useless extension candidates. Maximal degree in co-relation 47614. Up to 5795 conditions per place. [2024-06-03 20:35:38,357 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 399 selfloop transitions, 53 changer transitions 0/458 dead transitions. [2024-06-03 20:35:38,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 458 transitions, 8454 flow [2024-06-03 20:35:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:35:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:35:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-03 20:35:38,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-03 20:35:38,358 INFO L175 Difference]: Start difference. First operand has 316 places, 441 transitions, 7332 flow. Second operand 9 states and 190 transitions. [2024-06-03 20:35:38,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 458 transitions, 8454 flow [2024-06-03 20:35:40,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 458 transitions, 8222 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:35:40,605 INFO L231 Difference]: Finished difference. Result has 320 places, 441 transitions, 7214 flow [2024-06-03 20:35:40,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7214, PETRI_PLACES=320, PETRI_TRANSITIONS=441} [2024-06-03 20:35:40,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-03 20:35:40,606 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 441 transitions, 7214 flow [2024-06-03 20:35:40,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:40,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:40,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:40,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:35:40,606 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)] === [2024-06-03 20:35:40,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:40,607 INFO L85 PathProgramCache]: Analyzing trace with hash -437783973, now seen corresponding path program 9 times [2024-06-03 20:35:40,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:40,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610714810] [2024-06-03 20:35:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:40,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:40,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:40,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610714810] [2024-06-03 20:35:40,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610714810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:40,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:40,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:35:40,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971622447] [2024-06-03 20:35:40,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:40,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:35:40,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:40,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:35:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:35:40,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:40,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 441 transitions, 7214 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:35:40,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:40,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:40,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:41,884 INFO L124 PetriNetUnfolderBase]: 3727/6297 cut-off events. [2024-06-03 20:35:41,885 INFO L125 PetriNetUnfolderBase]: For 682282/682284 co-relation queries the response was YES. [2024-06-03 20:35:41,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47260 conditions, 6297 events. 3727/6297 cut-off events. For 682282/682284 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43189 event pairs, 1031 based on Foata normal form. 4/6300 useless extension candidates. Maximal degree in co-relation 47108. Up to 5565 conditions per place. [2024-06-03 20:35:41,973 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 97 changer transitions 0/463 dead transitions. [2024-06-03 20:35:41,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 463 transitions, 8184 flow [2024-06-03 20:35:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:35:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:35:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:35:41,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-03 20:35:41,974 INFO L175 Difference]: Start difference. First operand has 320 places, 441 transitions, 7214 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:35:41,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 463 transitions, 8184 flow [2024-06-03 20:35:44,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 463 transitions, 8044 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 20:35:44,007 INFO L231 Difference]: Finished difference. Result has 318 places, 441 transitions, 7284 flow [2024-06-03 20:35:44,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7074, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7284, PETRI_PLACES=318, PETRI_TRANSITIONS=441} [2024-06-03 20:35:44,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-03 20:35:44,008 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 441 transitions, 7284 flow [2024-06-03 20:35:44,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:35:44,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:44,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:44,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:35:44,009 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)] === [2024-06-03 20:35:44,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1352632323, now seen corresponding path program 11 times [2024-06-03 20:35:44,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:44,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91951248] [2024-06-03 20:35:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:44,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:44,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:44,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91951248] [2024-06-03 20:35:44,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91951248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:44,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:44,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:44,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196410875] [2024-06-03 20:35:44,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:44,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:44,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:44,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:44,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:44,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:44,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 441 transitions, 7284 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:44,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:44,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:44,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:45,485 INFO L124 PetriNetUnfolderBase]: 3724/6292 cut-off events. [2024-06-03 20:35:45,485 INFO L125 PetriNetUnfolderBase]: For 689607/689607 co-relation queries the response was YES. [2024-06-03 20:35:45,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47478 conditions, 6292 events. 3724/6292 cut-off events. For 689607/689607 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43101 event pairs, 1022 based on Foata normal form. 1/6292 useless extension candidates. Maximal degree in co-relation 47325. Up to 5784 conditions per place. [2024-06-03 20:35:45,566 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 53 changer transitions 0/457 dead transitions. [2024-06-03 20:35:45,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 457 transitions, 8224 flow [2024-06-03 20:35:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:35:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:35:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-03 20:35:45,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:35:45,568 INFO L175 Difference]: Start difference. First operand has 318 places, 441 transitions, 7284 flow. Second operand 9 states and 189 transitions. [2024-06-03 20:35:45,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 457 transitions, 8224 flow [2024-06-03 20:35:47,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 457 transitions, 7920 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:47,811 INFO L231 Difference]: Finished difference. Result has 320 places, 441 transitions, 7092 flow [2024-06-03 20:35:47,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6980, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7092, PETRI_PLACES=320, PETRI_TRANSITIONS=441} [2024-06-03 20:35:47,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-03 20:35:47,812 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 441 transitions, 7092 flow [2024-06-03 20:35:47,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:47,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:47,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:47,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:35:47,813 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)] === [2024-06-03 20:35:47,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:47,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1219417859, now seen corresponding path program 12 times [2024-06-03 20:35:47,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:47,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407095355] [2024-06-03 20:35:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:47,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:47,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:47,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407095355] [2024-06-03 20:35:47,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407095355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:47,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:47,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:47,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118091949] [2024-06-03 20:35:47,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:47,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:47,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:48,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:48,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:48,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 441 transitions, 7092 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:48,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:48,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:48,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:49,126 INFO L124 PetriNetUnfolderBase]: 3734/6311 cut-off events. [2024-06-03 20:35:49,126 INFO L125 PetriNetUnfolderBase]: For 676804/676806 co-relation queries the response was YES. [2024-06-03 20:35:49,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47091 conditions, 6311 events. 3734/6311 cut-off events. For 676804/676806 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43278 event pairs, 1031 based on Foata normal form. 4/6314 useless extension candidates. Maximal degree in co-relation 46938. Up to 5451 conditions per place. [2024-06-03 20:35:49,208 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 145 changer transitions 0/471 dead transitions. [2024-06-03 20:35:49,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 471 transitions, 8530 flow [2024-06-03 20:35:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:35:49,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-03 20:35:49,210 INFO L175 Difference]: Start difference. First operand has 320 places, 441 transitions, 7092 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:35:49,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 471 transitions, 8530 flow [2024-06-03 20:35:51,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 471 transitions, 8402 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 20:35:51,771 INFO L231 Difference]: Finished difference. Result has 320 places, 445 transitions, 7351 flow [2024-06-03 20:35:51,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7351, PETRI_PLACES=320, PETRI_TRANSITIONS=445} [2024-06-03 20:35:51,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-03 20:35:51,771 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 445 transitions, 7351 flow [2024-06-03 20:35:51,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:51,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:51,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:51,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:35:51,772 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)] === [2024-06-03 20:35:51,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash 721394463, now seen corresponding path program 13 times [2024-06-03 20:35:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:51,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270505363] [2024-06-03 20:35:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:51,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:51,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:51,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270505363] [2024-06-03 20:35:51,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270505363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:51,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:51,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:51,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039695468] [2024-06-03 20:35:51,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:51,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:51,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:51,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:51,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:51,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:51,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 445 transitions, 7351 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:51,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:51,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:51,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:53,113 INFO L124 PetriNetUnfolderBase]: 3739/6319 cut-off events. [2024-06-03 20:35:53,113 INFO L125 PetriNetUnfolderBase]: For 688437/688437 co-relation queries the response was YES. [2024-06-03 20:35:53,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47685 conditions, 6319 events. 3739/6319 cut-off events. For 688437/688437 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43366 event pairs, 1022 based on Foata normal form. 1/6319 useless extension candidates. Maximal degree in co-relation 47531. Up to 5455 conditions per place. [2024-06-03 20:35:53,195 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 313 selfloop transitions, 160 changer transitions 0/479 dead transitions. [2024-06-03 20:35:53,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 479 transitions, 8986 flow [2024-06-03 20:35:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:35:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:35:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 20:35:53,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-03 20:35:53,196 INFO L175 Difference]: Start difference. First operand has 320 places, 445 transitions, 7351 flow. Second operand 9 states and 212 transitions. [2024-06-03 20:35:53,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 479 transitions, 8986 flow [2024-06-03 20:35:55,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 479 transitions, 8656 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:35:55,431 INFO L231 Difference]: Finished difference. Result has 323 places, 448 transitions, 7424 flow [2024-06-03 20:35:55,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7025, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7424, PETRI_PLACES=323, PETRI_TRANSITIONS=448} [2024-06-03 20:35:55,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-03 20:35:55,432 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 448 transitions, 7424 flow [2024-06-03 20:35:55,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:55,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:55,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:55,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:35:55,433 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)] === [2024-06-03 20:35:55,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1212066209, now seen corresponding path program 14 times [2024-06-03 20:35:55,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:55,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569970818] [2024-06-03 20:35:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:55,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:55,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:55,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569970818] [2024-06-03 20:35:55,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569970818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:55,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:55,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:55,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191857407] [2024-06-03 20:35:55,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:55,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:55,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:55,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:55,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:55,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:55,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 448 transitions, 7424 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:55,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:55,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:55,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:56,831 INFO L124 PetriNetUnfolderBase]: 3741/6325 cut-off events. [2024-06-03 20:35:56,832 INFO L125 PetriNetUnfolderBase]: For 703163/703165 co-relation queries the response was YES. [2024-06-03 20:35:56,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47790 conditions, 6325 events. 3741/6325 cut-off events. For 703163/703165 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43409 event pairs, 1031 based on Foata normal form. 4/6328 useless extension candidates. Maximal degree in co-relation 47635. Up to 5459 conditions per place. [2024-06-03 20:35:56,904 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 144 changer transitions 0/476 dead transitions. [2024-06-03 20:35:56,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 476 transitions, 9044 flow [2024-06-03 20:35:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:35:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:35:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-03 20:35:56,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-03 20:35:56,905 INFO L175 Difference]: Start difference. First operand has 323 places, 448 transitions, 7424 flow. Second operand 9 states and 206 transitions. [2024-06-03 20:35:56,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 476 transitions, 9044 flow [2024-06-03 20:35:59,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 476 transitions, 8743 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:59,098 INFO L231 Difference]: Finished difference. Result has 325 places, 451 transitions, 7498 flow [2024-06-03 20:35:59,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7498, PETRI_PLACES=325, PETRI_TRANSITIONS=451} [2024-06-03 20:35:59,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-03 20:35:59,099 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 451 transitions, 7498 flow [2024-06-03 20:35:59,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:59,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:59,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:59,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:35:59,099 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)] === [2024-06-03 20:35:59,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -15546255, now seen corresponding path program 15 times [2024-06-03 20:35:59,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:59,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141269764] [2024-06-03 20:35:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:59,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:59,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141269764] [2024-06-03 20:35:59,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141269764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:59,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:59,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:59,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110928034] [2024-06-03 20:35:59,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:59,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:59,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:59,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:59,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:59,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:59,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 451 transitions, 7498 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:35:59,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:59,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:59,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:00,447 INFO L124 PetriNetUnfolderBase]: 3738/6320 cut-off events. [2024-06-03 20:36:00,448 INFO L125 PetriNetUnfolderBase]: For 695364/695364 co-relation queries the response was YES. [2024-06-03 20:36:00,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47618 conditions, 6320 events. 3738/6320 cut-off events. For 695364/695364 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43354 event pairs, 1022 based on Foata normal form. 1/6320 useless extension candidates. Maximal degree in co-relation 47463. Up to 5457 conditions per place. [2024-06-03 20:36:00,525 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 168 changer transitions 0/480 dead transitions. [2024-06-03 20:36:00,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 480 transitions, 8700 flow [2024-06-03 20:36:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:36:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:36:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 20:36:00,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-03 20:36:00,527 INFO L175 Difference]: Start difference. First operand has 325 places, 451 transitions, 7498 flow. Second operand 9 states and 211 transitions. [2024-06-03 20:36:00,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 480 transitions, 8700 flow [2024-06-03 20:36:02,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 480 transitions, 8310 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:36:02,820 INFO L231 Difference]: Finished difference. Result has 327 places, 451 transitions, 7454 flow [2024-06-03 20:36:02,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7108, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7454, PETRI_PLACES=327, PETRI_TRANSITIONS=451} [2024-06-03 20:36:02,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-03 20:36:02,821 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 451 transitions, 7454 flow [2024-06-03 20:36:02,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:02,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:02,821 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] [2024-06-03 20:36:02,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:36:02,822 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)] === [2024-06-03 20:36:02,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:02,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1222914101, now seen corresponding path program 7 times [2024-06-03 20:36:02,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:02,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716244850] [2024-06-03 20:36:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:02,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:03,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:03,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716244850] [2024-06-03 20:36:03,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716244850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:03,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:03,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:03,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522444895] [2024-06-03 20:36:03,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:03,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:03,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 451 transitions, 7454 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:03,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:03,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:03,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:04,191 INFO L124 PetriNetUnfolderBase]: 3870/6541 cut-off events. [2024-06-03 20:36:04,191 INFO L125 PetriNetUnfolderBase]: For 885568/885570 co-relation queries the response was YES. [2024-06-03 20:36:04,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48955 conditions, 6541 events. 3870/6541 cut-off events. For 885568/885570 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45181 event pairs, 1077 based on Foata normal form. 44/6584 useless extension candidates. Maximal degree in co-relation 48799. Up to 5475 conditions per place. [2024-06-03 20:36:04,278 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 159 changer transitions 3/488 dead transitions. [2024-06-03 20:36:04,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 488 transitions, 8962 flow [2024-06-03 20:36:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:36:04,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:36:04,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:36:04,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-03 20:36:04,279 INFO L175 Difference]: Start difference. First operand has 327 places, 451 transitions, 7454 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:36:04,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 488 transitions, 8962 flow [2024-06-03 20:36:07,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 488 transitions, 8500 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-03 20:36:07,357 INFO L231 Difference]: Finished difference. Result has 325 places, 452 transitions, 7384 flow [2024-06-03 20:36:07,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7000, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7384, PETRI_PLACES=325, PETRI_TRANSITIONS=452} [2024-06-03 20:36:07,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-03 20:36:07,358 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 452 transitions, 7384 flow [2024-06-03 20:36:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:07,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:07,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:07,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:36:07,359 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)] === [2024-06-03 20:36:07,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:07,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1223240531, now seen corresponding path program 8 times [2024-06-03 20:36:07,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:07,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870014973] [2024-06-03 20:36:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:07,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:07,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:07,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870014973] [2024-06-03 20:36:07,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870014973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:07,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:07,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:07,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274457799] [2024-06-03 20:36:07,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:07,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:07,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:07,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:07,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:07,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 452 transitions, 7384 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:07,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:07,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:07,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:08,808 INFO L124 PetriNetUnfolderBase]: 4095/6932 cut-off events. [2024-06-03 20:36:08,808 INFO L125 PetriNetUnfolderBase]: For 953862/953864 co-relation queries the response was YES. [2024-06-03 20:36:08,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52561 conditions, 6932 events. 4095/6932 cut-off events. For 953862/953864 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 48362 event pairs, 1021 based on Foata normal form. 38/6969 useless extension candidates. Maximal degree in co-relation 52406. Up to 5020 conditions per place. [2024-06-03 20:36:08,898 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 169 changer transitions 4/499 dead transitions. [2024-06-03 20:36:08,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 499 transitions, 9140 flow [2024-06-03 20:36:08,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:36:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:36:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-03 20:36:08,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-03 20:36:08,899 INFO L175 Difference]: Start difference. First operand has 325 places, 452 transitions, 7384 flow. Second operand 8 states and 208 transitions. [2024-06-03 20:36:08,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 499 transitions, 9140 flow [2024-06-03 20:36:11,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 499 transitions, 8776 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:36:11,320 INFO L231 Difference]: Finished difference. Result has 327 places, 453 transitions, 7408 flow [2024-06-03 20:36:11,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7020, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7408, PETRI_PLACES=327, PETRI_TRANSITIONS=453} [2024-06-03 20:36:11,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-03 20:36:11,321 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 453 transitions, 7408 flow [2024-06-03 20:36:11,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:11,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:11,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:11,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:36:11,321 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)] === [2024-06-03 20:36:11,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1212189341, now seen corresponding path program 9 times [2024-06-03 20:36:11,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:11,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031462218] [2024-06-03 20:36:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:11,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:11,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031462218] [2024-06-03 20:36:11,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031462218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:11,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:11,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:11,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940718164] [2024-06-03 20:36:11,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:11,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:11,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:11,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:11,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:11,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:11,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 453 transitions, 7408 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:11,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:11,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:11,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:12,775 INFO L124 PetriNetUnfolderBase]: 4105/6958 cut-off events. [2024-06-03 20:36:12,775 INFO L125 PetriNetUnfolderBase]: For 932204/932206 co-relation queries the response was YES. [2024-06-03 20:36:12,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50867 conditions, 6958 events. 4105/6958 cut-off events. For 932204/932206 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 48845 event pairs, 1226 based on Foata normal form. 44/7001 useless extension candidates. Maximal degree in co-relation 50711. Up to 5876 conditions per place. [2024-06-03 20:36:12,869 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 144 changer transitions 3/482 dead transitions. [2024-06-03 20:36:12,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 482 transitions, 8818 flow [2024-06-03 20:36:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:36:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:36:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:36:12,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:36:12,870 INFO L175 Difference]: Start difference. First operand has 327 places, 453 transitions, 7408 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:36:12,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 482 transitions, 8818 flow [2024-06-03 20:36:15,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 482 transitions, 8232 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 20:36:15,910 INFO L231 Difference]: Finished difference. Result has 328 places, 452 transitions, 7102 flow [2024-06-03 20:36:15,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6822, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7102, PETRI_PLACES=328, PETRI_TRANSITIONS=452} [2024-06-03 20:36:15,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-03 20:36:15,911 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 452 transitions, 7102 flow [2024-06-03 20:36:15,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:15,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:15,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:15,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:36:15,912 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)] === [2024-06-03 20:36:15,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1211789627, now seen corresponding path program 2 times [2024-06-03 20:36:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:15,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999046132] [2024-06-03 20:36:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:15,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:16,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:16,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999046132] [2024-06-03 20:36:16,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999046132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:16,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:16,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:16,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679897412] [2024-06-03 20:36:16,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:16,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:16,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:16,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:16,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:16,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 452 transitions, 7102 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:16,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:16,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:16,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:17,394 INFO L124 PetriNetUnfolderBase]: 4337/7376 cut-off events. [2024-06-03 20:36:17,395 INFO L125 PetriNetUnfolderBase]: For 998987/998989 co-relation queries the response was YES. [2024-06-03 20:36:17,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53892 conditions, 7376 events. 4337/7376 cut-off events. For 998987/998989 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 52497 event pairs, 1251 based on Foata normal form. 38/7413 useless extension candidates. Maximal degree in co-relation 53736. Up to 5670 conditions per place. [2024-06-03 20:36:17,482 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 343 selfloop transitions, 143 changer transitions 0/492 dead transitions. [2024-06-03 20:36:17,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 492 transitions, 8878 flow [2024-06-03 20:36:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:36:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:36:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:36:17,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-03 20:36:17,484 INFO L175 Difference]: Start difference. First operand has 328 places, 452 transitions, 7102 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:36:17,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 492 transitions, 8878 flow [2024-06-03 20:36:20,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 492 transitions, 8525 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:36:20,487 INFO L231 Difference]: Finished difference. Result has 330 places, 456 transitions, 7186 flow [2024-06-03 20:36:20,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7186, PETRI_PLACES=330, PETRI_TRANSITIONS=456} [2024-06-03 20:36:20,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-03 20:36:20,487 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 456 transitions, 7186 flow [2024-06-03 20:36:20,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:20,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:20,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:20,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:36:20,488 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)] === [2024-06-03 20:36:20,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1712274905, now seen corresponding path program 3 times [2024-06-03 20:36:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:20,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630342922] [2024-06-03 20:36:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:20,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:20,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:20,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630342922] [2024-06-03 20:36:20,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630342922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:20,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:20,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:20,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026737152] [2024-06-03 20:36:20,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:20,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:20,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:20,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 456 transitions, 7186 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:20,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:20,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:20,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:22,031 INFO L124 PetriNetUnfolderBase]: 4505/7684 cut-off events. [2024-06-03 20:36:22,032 INFO L125 PetriNetUnfolderBase]: For 1028100/1028102 co-relation queries the response was YES. [2024-06-03 20:36:22,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55864 conditions, 7684 events. 4505/7684 cut-off events. For 1028100/1028102 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55264 event pairs, 1096 based on Foata normal form. 44/7727 useless extension candidates. Maximal degree in co-relation 55706. Up to 5945 conditions per place. [2024-06-03 20:36:22,129 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 385 selfloop transitions, 110 changer transitions 0/501 dead transitions. [2024-06-03 20:36:22,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 501 transitions, 8648 flow [2024-06-03 20:36:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:36:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:36:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-03 20:36:22,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-03 20:36:22,130 INFO L175 Difference]: Start difference. First operand has 330 places, 456 transitions, 7186 flow. Second operand 7 states and 185 transitions. [2024-06-03 20:36:22,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 501 transitions, 8648 flow [2024-06-03 20:36:25,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 501 transitions, 8408 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 20:36:25,782 INFO L231 Difference]: Finished difference. Result has 334 places, 462 transitions, 7363 flow [2024-06-03 20:36:25,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7363, PETRI_PLACES=334, PETRI_TRANSITIONS=462} [2024-06-03 20:36:25,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-03 20:36:25,783 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 462 transitions, 7363 flow [2024-06-03 20:36:25,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:25,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:25,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:25,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:36:25,783 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)] === [2024-06-03 20:36:25,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1269446105, now seen corresponding path program 4 times [2024-06-03 20:36:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887486865] [2024-06-03 20:36:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:25,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:25,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:25,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887486865] [2024-06-03 20:36:25,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887486865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:25,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:25,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:25,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113351093] [2024-06-03 20:36:25,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:25,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:25,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:26,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:26,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 462 transitions, 7363 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:26,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:26,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:26,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:27,511 INFO L124 PetriNetUnfolderBase]: 4954/8465 cut-off events. [2024-06-03 20:36:27,512 INFO L125 PetriNetUnfolderBase]: For 1291156/1291158 co-relation queries the response was YES. [2024-06-03 20:36:27,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65086 conditions, 8465 events. 4954/8465 cut-off events. For 1291156/1291158 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 61892 event pairs, 1199 based on Foata normal form. 44/8508 useless extension candidates. Maximal degree in co-relation 64925. Up to 4666 conditions per place. [2024-06-03 20:36:27,622 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 393 selfloop transitions, 114 changer transitions 0/513 dead transitions. [2024-06-03 20:36:27,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 513 transitions, 9107 flow [2024-06-03 20:36:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:36:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:36:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-03 20:36:27,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-03 20:36:27,624 INFO L175 Difference]: Start difference. First operand has 334 places, 462 transitions, 7363 flow. Second operand 7 states and 188 transitions. [2024-06-03 20:36:27,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 513 transitions, 9107 flow [2024-06-03 20:36:31,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 513 transitions, 8899 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 20:36:31,183 INFO L231 Difference]: Finished difference. Result has 339 places, 469 transitions, 7646 flow [2024-06-03 20:36:31,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7646, PETRI_PLACES=339, PETRI_TRANSITIONS=469} [2024-06-03 20:36:31,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-03 20:36:31,184 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 469 transitions, 7646 flow [2024-06-03 20:36:31,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:31,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:31,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:31,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:36:31,184 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)] === [2024-06-03 20:36:31,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash -571703117, now seen corresponding path program 1 times [2024-06-03 20:36:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:31,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692513402] [2024-06-03 20:36:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:31,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:31,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692513402] [2024-06-03 20:36:31,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692513402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:31,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:31,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:31,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140626621] [2024-06-03 20:36:31,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:31,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:31,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:31,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:31,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:31,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:31,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 469 transitions, 7646 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:31,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:31,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:31,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:33,028 INFO L124 PetriNetUnfolderBase]: 5235/8953 cut-off events. [2024-06-03 20:36:33,028 INFO L125 PetriNetUnfolderBase]: For 1431921/1431929 co-relation queries the response was YES. [2024-06-03 20:36:33,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71007 conditions, 8953 events. 5235/8953 cut-off events. For 1431921/1431929 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 67044 event pairs, 1651 based on Foata normal form. 39/8987 useless extension candidates. Maximal degree in co-relation 70843. Up to 6372 conditions per place. [2024-06-03 20:36:33,156 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 213 selfloop transitions, 285 changer transitions 7/511 dead transitions. [2024-06-03 20:36:33,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 511 transitions, 9276 flow [2024-06-03 20:36:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:36:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:36:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:36:33,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-03 20:36:33,157 INFO L175 Difference]: Start difference. First operand has 339 places, 469 transitions, 7646 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:36:33,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 511 transitions, 9276 flow [2024-06-03 20:36:37,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 511 transitions, 9082 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-03 20:36:37,878 INFO L231 Difference]: Finished difference. Result has 344 places, 471 transitions, 8087 flow [2024-06-03 20:36:37,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7456, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8087, PETRI_PLACES=344, PETRI_TRANSITIONS=471} [2024-06-03 20:36:37,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-03 20:36:37,879 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 471 transitions, 8087 flow [2024-06-03 20:36:37,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:37,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:37,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:37,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:36:37,880 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)] === [2024-06-03 20:36:37,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 290785843, now seen corresponding path program 2 times [2024-06-03 20:36:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:37,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864851734] [2024-06-03 20:36:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:38,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864851734] [2024-06-03 20:36:38,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864851734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:38,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:38,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:38,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048755309] [2024-06-03 20:36:38,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:38,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:38,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:38,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:38,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 471 transitions, 8087 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:38,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:38,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:38,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:39,862 INFO L124 PetriNetUnfolderBase]: 5512/9406 cut-off events. [2024-06-03 20:36:39,862 INFO L125 PetriNetUnfolderBase]: For 1632364/1632372 co-relation queries the response was YES. [2024-06-03 20:36:39,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77401 conditions, 9406 events. 5512/9406 cut-off events. For 1632364/1632372 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 70967 event pairs, 1963 based on Foata normal form. 39/9440 useless extension candidates. Maximal degree in co-relation 77236. Up to 7574 conditions per place. [2024-06-03 20:36:39,988 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 271 changer transitions 4/507 dead transitions. [2024-06-03 20:36:39,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 507 transitions, 9709 flow [2024-06-03 20:36:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:36:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:36:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:36:39,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:36:39,989 INFO L175 Difference]: Start difference. First operand has 344 places, 471 transitions, 8087 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:36:39,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 507 transitions, 9709 flow [2024-06-03 20:36:45,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 507 transitions, 8936 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-03 20:36:45,933 INFO L231 Difference]: Finished difference. Result has 346 places, 474 transitions, 7968 flow [2024-06-03 20:36:45,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7346, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7968, PETRI_PLACES=346, PETRI_TRANSITIONS=474} [2024-06-03 20:36:45,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-03 20:36:45,934 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 474 transitions, 7968 flow [2024-06-03 20:36:45,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:45,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:45,935 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] [2024-06-03 20:36:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:36:45,935 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)] === [2024-06-03 20:36:45,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash 290933713, now seen corresponding path program 3 times [2024-06-03 20:36:45,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:45,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240356331] [2024-06-03 20:36:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:46,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:46,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240356331] [2024-06-03 20:36:46,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240356331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:46,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:46,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:46,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030543438] [2024-06-03 20:36:46,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:46,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:46,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:46,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:46,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:46,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:46,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 474 transitions, 7968 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:46,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:46,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:46,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:47,879 INFO L124 PetriNetUnfolderBase]: 5395/9227 cut-off events. [2024-06-03 20:36:47,879 INFO L125 PetriNetUnfolderBase]: For 1491183/1491191 co-relation queries the response was YES. [2024-06-03 20:36:47,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71914 conditions, 9227 events. 5395/9227 cut-off events. For 1491183/1491191 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 69474 event pairs, 1970 based on Foata normal form. 45/9267 useless extension candidates. Maximal degree in co-relation 71749. Up to 7736 conditions per place. [2024-06-03 20:36:47,992 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 266 changer transitions 3/499 dead transitions. [2024-06-03 20:36:47,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 499 transitions, 9226 flow [2024-06-03 20:36:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:36:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:36:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:36:47,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 20:36:47,993 INFO L175 Difference]: Start difference. First operand has 346 places, 474 transitions, 7968 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:36:47,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 499 transitions, 9226 flow [2024-06-03 20:36:52,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 499 transitions, 8805 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 20:36:52,448 INFO L231 Difference]: Finished difference. Result has 350 places, 473 transitions, 8073 flow [2024-06-03 20:36:52,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7547, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8073, PETRI_PLACES=350, PETRI_TRANSITIONS=473} [2024-06-03 20:36:52,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-03 20:36:52,449 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 473 transitions, 8073 flow [2024-06-03 20:36:52,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:52,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:52,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:52,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:36:52,450 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)] === [2024-06-03 20:36:52,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash -430007313, now seen corresponding path program 4 times [2024-06-03 20:36:52,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:52,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449157051] [2024-06-03 20:36:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:52,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:52,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:52,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449157051] [2024-06-03 20:36:52,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449157051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:52,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:52,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:52,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062433175] [2024-06-03 20:36:52,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:52,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:52,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:52,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:52,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:52,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:52,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 473 transitions, 8073 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:36:52,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:52,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:52,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:54,488 INFO L124 PetriNetUnfolderBase]: 5441/9333 cut-off events. [2024-06-03 20:36:54,489 INFO L125 PetriNetUnfolderBase]: For 1394253/1394253 co-relation queries the response was YES. [2024-06-03 20:36:54,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72979 conditions, 9333 events. 5441/9333 cut-off events. For 1394253/1394253 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 70529 event pairs, 1903 based on Foata normal form. 16/9348 useless extension candidates. Maximal degree in co-relation 72812. Up to 8551 conditions per place. [2024-06-03 20:36:54,605 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 55 changer transitions 0/495 dead transitions. [2024-06-03 20:36:54,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 495 transitions, 9163 flow [2024-06-03 20:36:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:36:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:36:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-03 20:36:54,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-03 20:36:54,606 INFO L175 Difference]: Start difference. First operand has 350 places, 473 transitions, 8073 flow. Second operand 9 states and 192 transitions. [2024-06-03 20:36:54,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 495 transitions, 9163 flow [2024-06-03 20:37:00,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 495 transitions, 8623 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:37:00,089 INFO L231 Difference]: Finished difference. Result has 352 places, 475 transitions, 7703 flow [2024-06-03 20:37:00,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7533, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7703, PETRI_PLACES=352, PETRI_TRANSITIONS=475} [2024-06-03 20:37:00,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-03 20:37:00,090 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 475 transitions, 7703 flow [2024-06-03 20:37:00,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:00,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:00,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:00,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:37:00,091 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)] === [2024-06-03 20:37:00,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:00,091 INFO L85 PathProgramCache]: Analyzing trace with hash -430155183, now seen corresponding path program 5 times [2024-06-03 20:37:00,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:00,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549867032] [2024-06-03 20:37:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:00,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:00,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:00,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549867032] [2024-06-03 20:37:00,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549867032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:00,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:00,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075602882] [2024-06-03 20:37:00,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:00,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:00,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:00,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:00,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 475 transitions, 7703 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:00,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:00,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:00,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:02,229 INFO L124 PetriNetUnfolderBase]: 5527/9469 cut-off events. [2024-06-03 20:37:02,230 INFO L125 PetriNetUnfolderBase]: For 1445309/1445309 co-relation queries the response was YES. [2024-06-03 20:37:02,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74376 conditions, 9469 events. 5527/9469 cut-off events. For 1445309/1445309 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 71674 event pairs, 1897 based on Foata normal form. 12/9480 useless extension candidates. Maximal degree in co-relation 74208. Up to 8511 conditions per place. [2024-06-03 20:37:02,338 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 62 changer transitions 0/502 dead transitions. [2024-06-03 20:37:02,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 502 transitions, 9055 flow [2024-06-03 20:37:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:37:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:37:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 20:37:02,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 20:37:02,339 INFO L175 Difference]: Start difference. First operand has 352 places, 475 transitions, 7703 flow. Second operand 9 states and 195 transitions. [2024-06-03 20:37:02,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 502 transitions, 9055 flow [2024-06-03 20:37:07,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 502 transitions, 8915 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:37:07,153 INFO L231 Difference]: Finished difference. Result has 354 places, 478 transitions, 7780 flow [2024-06-03 20:37:07,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7563, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7780, PETRI_PLACES=354, PETRI_TRANSITIONS=478} [2024-06-03 20:37:07,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-03 20:37:07,154 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 478 transitions, 7780 flow [2024-06-03 20:37:07,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:07,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:07,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:07,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:37:07,155 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)] === [2024-06-03 20:37:07,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash -424429731, now seen corresponding path program 1 times [2024-06-03 20:37:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583547793] [2024-06-03 20:37:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:07,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:07,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583547793] [2024-06-03 20:37:07,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583547793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:07,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:07,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:07,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112978617] [2024-06-03 20:37:07,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:07,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:07,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:07,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:07,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 478 transitions, 7780 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:07,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:07,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:07,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:09,431 INFO L124 PetriNetUnfolderBase]: 5692/9694 cut-off events. [2024-06-03 20:37:09,431 INFO L125 PetriNetUnfolderBase]: For 1574952/1574952 co-relation queries the response was YES. [2024-06-03 20:37:09,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78416 conditions, 9694 events. 5692/9694 cut-off events. For 1574952/1574952 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 73227 event pairs, 1923 based on Foata normal form. 12/9705 useless extension candidates. Maximal degree in co-relation 78247. Up to 8757 conditions per place. [2024-06-03 20:37:09,551 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 463 selfloop transitions, 39 changer transitions 0/508 dead transitions. [2024-06-03 20:37:09,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 508 transitions, 9213 flow [2024-06-03 20:37:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:37:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:37:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-03 20:37:09,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-03 20:37:09,552 INFO L175 Difference]: Start difference. First operand has 354 places, 478 transitions, 7780 flow. Second operand 9 states and 192 transitions. [2024-06-03 20:37:09,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 508 transitions, 9213 flow [2024-06-03 20:37:13,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 508 transitions, 9107 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:37:13,964 INFO L231 Difference]: Finished difference. Result has 359 places, 484 transitions, 7938 flow [2024-06-03 20:37:13,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7674, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7938, PETRI_PLACES=359, PETRI_TRANSITIONS=484} [2024-06-03 20:37:13,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-03 20:37:13,965 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 484 transitions, 7938 flow [2024-06-03 20:37:13,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:13,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:13,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:13,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:37:13,965 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)] === [2024-06-03 20:37:13,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:13,966 INFO L85 PathProgramCache]: Analyzing trace with hash -15537327, now seen corresponding path program 6 times [2024-06-03 20:37:13,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:13,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112795485] [2024-06-03 20:37:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:13,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:14,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:14,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112795485] [2024-06-03 20:37:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112795485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:14,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:14,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:14,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927669284] [2024-06-03 20:37:14,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:14,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:14,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:14,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:14,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 484 transitions, 7938 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:14,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:14,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:14,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:16,198 INFO L124 PetriNetUnfolderBase]: 5811/9937 cut-off events. [2024-06-03 20:37:16,198 INFO L125 PetriNetUnfolderBase]: For 1746688/1746688 co-relation queries the response was YES. [2024-06-03 20:37:16,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79778 conditions, 9937 events. 5811/9937 cut-off events. For 1746688/1746688 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 75793 event pairs, 2025 based on Foata normal form. 42/9978 useless extension candidates. Maximal degree in co-relation 79606. Up to 8592 conditions per place. [2024-06-03 20:37:16,316 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 167 changer transitions 3/521 dead transitions. [2024-06-03 20:37:16,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 521 transitions, 9332 flow [2024-06-03 20:37:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:37:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:37:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-03 20:37:16,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:37:16,317 INFO L175 Difference]: Start difference. First operand has 359 places, 484 transitions, 7938 flow. Second operand 9 states and 216 transitions. [2024-06-03 20:37:16,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 521 transitions, 9332 flow [2024-06-03 20:37:21,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 521 transitions, 9219 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:37:21,934 INFO L231 Difference]: Finished difference. Result has 363 places, 485 transitions, 8214 flow [2024-06-03 20:37:21,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7825, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8214, PETRI_PLACES=363, PETRI_TRANSITIONS=485} [2024-06-03 20:37:21,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-03 20:37:21,935 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 485 transitions, 8214 flow [2024-06-03 20:37:21,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:21,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:21,935 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] [2024-06-03 20:37:21,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:37:21,936 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)] === [2024-06-03 20:37:21,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash -15685197, now seen corresponding path program 7 times [2024-06-03 20:37:21,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:21,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475668708] [2024-06-03 20:37:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:22,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475668708] [2024-06-03 20:37:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475668708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:22,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:22,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390397206] [2024-06-03 20:37:22,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:22,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:22,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:22,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:22,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:22,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 485 transitions, 8214 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:22,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:22,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:22,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:24,265 INFO L124 PetriNetUnfolderBase]: 6049/10351 cut-off events. [2024-06-03 20:37:24,265 INFO L125 PetriNetUnfolderBase]: For 1897715/1897715 co-relation queries the response was YES. [2024-06-03 20:37:24,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84754 conditions, 10351 events. 6049/10351 cut-off events. For 1897715/1897715 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 79724 event pairs, 1889 based on Foata normal form. 36/10386 useless extension candidates. Maximal degree in co-relation 84581. Up to 8039 conditions per place. [2024-06-03 20:37:24,401 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 183 changer transitions 4/532 dead transitions. [2024-06-03 20:37:24,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 532 transitions, 9888 flow [2024-06-03 20:37:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:37:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:37:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-03 20:37:24,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:37:24,403 INFO L175 Difference]: Start difference. First operand has 363 places, 485 transitions, 8214 flow. Second operand 9 states and 225 transitions. [2024-06-03 20:37:24,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 532 transitions, 9888 flow [2024-06-03 20:37:31,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 532 transitions, 9526 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:37:31,689 INFO L231 Difference]: Finished difference. Result has 365 places, 486 transitions, 8260 flow [2024-06-03 20:37:31,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7852, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8260, PETRI_PLACES=365, PETRI_TRANSITIONS=486} [2024-06-03 20:37:31,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-03 20:37:31,690 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 486 transitions, 8260 flow [2024-06-03 20:37:31,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:31,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:31,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:31,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:37:31,690 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)] === [2024-06-03 20:37:31,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash -9959745, now seen corresponding path program 2 times [2024-06-03 20:37:31,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:31,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714515596] [2024-06-03 20:37:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:31,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:31,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:31,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714515596] [2024-06-03 20:37:31,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714515596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:31,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:31,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:31,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668170632] [2024-06-03 20:37:31,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:31,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:31,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 486 transitions, 8260 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:31,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:31,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:31,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:33,983 INFO L124 PetriNetUnfolderBase]: 6260/10640 cut-off events. [2024-06-03 20:37:33,983 INFO L125 PetriNetUnfolderBase]: For 1924041/1924041 co-relation queries the response was YES. [2024-06-03 20:37:34,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89766 conditions, 10640 events. 6260/10640 cut-off events. For 1924041/1924041 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 81580 event pairs, 2136 based on Foata normal form. 12/10651 useless extension candidates. Maximal degree in co-relation 89592. Up to 9380 conditions per place. [2024-06-03 20:37:34,129 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 466 selfloop transitions, 53 changer transitions 0/525 dead transitions. [2024-06-03 20:37:34,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 525 transitions, 9961 flow [2024-06-03 20:37:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:37:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:37:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 20:37:34,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-03 20:37:34,130 INFO L175 Difference]: Start difference. First operand has 365 places, 486 transitions, 8260 flow. Second operand 8 states and 175 transitions. [2024-06-03 20:37:34,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 525 transitions, 9961 flow [2024-06-03 20:37:41,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 525 transitions, 9663 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 20:37:41,888 INFO L231 Difference]: Finished difference. Result has 370 places, 499 transitions, 8474 flow [2024-06-03 20:37:41,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7981, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8474, PETRI_PLACES=370, PETRI_TRANSITIONS=499} [2024-06-03 20:37:41,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-03 20:37:41,889 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 499 transitions, 8474 flow [2024-06-03 20:37:41,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:41,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:41,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:41,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:37:41,890 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)] === [2024-06-03 20:37:41,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:41,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1534958687, now seen corresponding path program 3 times [2024-06-03 20:37:41,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:41,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282753911] [2024-06-03 20:37:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:41,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:42,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:42,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282753911] [2024-06-03 20:37:42,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282753911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:42,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:42,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:42,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686634829] [2024-06-03 20:37:42,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:42,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:42,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:42,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:42,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:42,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:42,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 499 transitions, 8474 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:42,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:42,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:42,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:44,387 INFO L124 PetriNetUnfolderBase]: 6542/11154 cut-off events. [2024-06-03 20:37:44,387 INFO L125 PetriNetUnfolderBase]: For 2180410/2180410 co-relation queries the response was YES. [2024-06-03 20:37:44,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94791 conditions, 11154 events. 6542/11154 cut-off events. For 2180410/2180410 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 86751 event pairs, 1926 based on Foata normal form. 42/11191 useless extension candidates. Maximal degree in co-relation 94614. Up to 8610 conditions per place. [2024-06-03 20:37:44,550 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 403 selfloop transitions, 141 changer transitions 0/550 dead transitions. [2024-06-03 20:37:44,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 550 transitions, 10114 flow [2024-06-03 20:37:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:37:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:37:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 20:37:44,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-03 20:37:44,551 INFO L175 Difference]: Start difference. First operand has 370 places, 499 transitions, 8474 flow. Second operand 8 states and 207 transitions. [2024-06-03 20:37:44,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 550 transitions, 10114 flow [2024-06-03 20:37:52,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 550 transitions, 9980 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-03 20:37:52,495 INFO L231 Difference]: Finished difference. Result has 376 places, 507 transitions, 8922 flow [2024-06-03 20:37:52,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8354, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8922, PETRI_PLACES=376, PETRI_TRANSITIONS=507} [2024-06-03 20:37:52,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-03 20:37:52,496 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 507 transitions, 8922 flow [2024-06-03 20:37:52,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:52,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:52,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:52,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:37:52,497 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)] === [2024-06-03 20:37:52,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash -522619683, now seen corresponding path program 4 times [2024-06-03 20:37:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:52,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744920640] [2024-06-03 20:37:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:52,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:52,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744920640] [2024-06-03 20:37:52,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744920640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:52,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:52,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479760743] [2024-06-03 20:37:52,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:52,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:52,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:52,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:52,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 507 transitions, 8922 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:37:52,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:52,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:52,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:54,970 INFO L124 PetriNetUnfolderBase]: 6640/11373 cut-off events. [2024-06-03 20:37:54,970 INFO L125 PetriNetUnfolderBase]: For 2108682/2108684 co-relation queries the response was YES. [2024-06-03 20:37:55,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94960 conditions, 11373 events. 6640/11373 cut-off events. For 2108682/2108684 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 88676 event pairs, 1870 based on Foata normal form. 44/11416 useless extension candidates. Maximal degree in co-relation 94781. Up to 6224 conditions per place. [2024-06-03 20:37:55,146 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 118 changer transitions 0/552 dead transitions. [2024-06-03 20:37:55,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 552 transitions, 10644 flow [2024-06-03 20:37:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:37:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:37:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-03 20:37:55,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-03 20:37:55,148 INFO L175 Difference]: Start difference. First operand has 376 places, 507 transitions, 8922 flow. Second operand 7 states and 188 transitions. [2024-06-03 20:37:55,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 552 transitions, 10644 flow [2024-06-03 20:38:04,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 552 transitions, 10356 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 20:38:04,484 INFO L231 Difference]: Finished difference. Result has 377 places, 509 transitions, 8948 flow [2024-06-03 20:38:04,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8644, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8948, PETRI_PLACES=377, PETRI_TRANSITIONS=509} [2024-06-03 20:38:04,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-03 20:38:04,485 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 509 transitions, 8948 flow [2024-06-03 20:38:04,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:38:04,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:04,485 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] [2024-06-03 20:38:04,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:38:04,485 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)] === [2024-06-03 20:38:04,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:04,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1961716716, now seen corresponding path program 1 times [2024-06-03 20:38:04,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:04,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005633610] [2024-06-03 20:38:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:04,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:04,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:04,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005633610] [2024-06-03 20:38:04,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005633610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:04,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:04,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:38:04,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024591406] [2024-06-03 20:38:04,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:04,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:38:04,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:38:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:38:04,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:04,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 509 transitions, 8948 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:04,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:04,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:04,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:07,592 INFO L124 PetriNetUnfolderBase]: 6707/11455 cut-off events. [2024-06-03 20:38:07,592 INFO L125 PetriNetUnfolderBase]: For 1930769/1930769 co-relation queries the response was YES. [2024-06-03 20:38:07,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95772 conditions, 11455 events. 6707/11455 cut-off events. For 1930769/1930769 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 89558 event pairs, 2196 based on Foata normal form. 2/11449 useless extension candidates. Maximal degree in co-relation 95593. Up to 9806 conditions per place. [2024-06-03 20:38:07,737 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 125 changer transitions 0/550 dead transitions. [2024-06-03 20:38:07,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 550 transitions, 10775 flow [2024-06-03 20:38:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:38:07,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-03 20:38:07,738 INFO L175 Difference]: Start difference. First operand has 377 places, 509 transitions, 8948 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:38:07,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 550 transitions, 10775 flow [2024-06-03 20:38:14,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 550 transitions, 10491 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 20:38:14,520 INFO L231 Difference]: Finished difference. Result has 381 places, 517 transitions, 9156 flow [2024-06-03 20:38:14,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8676, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9156, PETRI_PLACES=381, PETRI_TRANSITIONS=517} [2024-06-03 20:38:14,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-03 20:38:14,521 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 517 transitions, 9156 flow [2024-06-03 20:38:14,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:14,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:14,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:14,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:38:14,522 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)] === [2024-06-03 20:38:14,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:14,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1956002796, now seen corresponding path program 2 times [2024-06-03 20:38:14,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:14,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508848150] [2024-06-03 20:38:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:14,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508848150] [2024-06-03 20:38:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508848150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:14,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:14,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:38:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920077089] [2024-06-03 20:38:14,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:14,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:38:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:38:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:38:14,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:14,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 517 transitions, 9156 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:14,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:14,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:14,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:17,517 INFO L124 PetriNetUnfolderBase]: 6774/11560 cut-off events. [2024-06-03 20:38:17,517 INFO L125 PetriNetUnfolderBase]: For 1981003/1981003 co-relation queries the response was YES. [2024-06-03 20:38:17,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96972 conditions, 11560 events. 6774/11560 cut-off events. For 1981003/1981003 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 90493 event pairs, 2179 based on Foata normal form. 2/11554 useless extension candidates. Maximal degree in co-relation 96792. Up to 9850 conditions per place. [2024-06-03 20:38:17,770 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 129 changer transitions 1/555 dead transitions. [2024-06-03 20:38:17,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 555 transitions, 10959 flow [2024-06-03 20:38:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:38:17,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-03 20:38:17,781 INFO L175 Difference]: Start difference. First operand has 381 places, 517 transitions, 9156 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:38:17,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 555 transitions, 10959 flow [2024-06-03 20:38:24,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 555 transitions, 10748 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-03 20:38:24,783 INFO L231 Difference]: Finished difference. Result has 386 places, 521 transitions, 9300 flow [2024-06-03 20:38:24,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8971, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9300, PETRI_PLACES=386, PETRI_TRANSITIONS=521} [2024-06-03 20:38:24,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-03 20:38:24,783 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 521 transitions, 9300 flow [2024-06-03 20:38:24,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:24,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:24,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:24,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:38:24,784 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)] === [2024-06-03 20:38:24,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1903624266, now seen corresponding path program 3 times [2024-06-03 20:38:24,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:24,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924569366] [2024-06-03 20:38:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:24,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:24,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924569366] [2024-06-03 20:38:24,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924569366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:24,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:24,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:38:24,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574699874] [2024-06-03 20:38:24,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:24,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:38:24,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:38:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:38:25,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:25,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 521 transitions, 9300 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:25,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:25,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:25,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:27,709 INFO L124 PetriNetUnfolderBase]: 6769/11573 cut-off events. [2024-06-03 20:38:27,709 INFO L125 PetriNetUnfolderBase]: For 2009280/2009280 co-relation queries the response was YES. [2024-06-03 20:38:27,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97490 conditions, 11573 events. 6769/11573 cut-off events. For 2009280/2009280 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 91044 event pairs, 2507 based on Foata normal form. 2/11562 useless extension candidates. Maximal degree in co-relation 97308. Up to 10466 conditions per place. [2024-06-03 20:38:27,865 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 429 selfloop transitions, 115 changer transitions 0/550 dead transitions. [2024-06-03 20:38:27,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 550 transitions, 10706 flow [2024-06-03 20:38:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:38:27,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-03 20:38:27,867 INFO L175 Difference]: Start difference. First operand has 386 places, 521 transitions, 9300 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:38:27,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 550 transitions, 10706 flow [2024-06-03 20:38:35,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 550 transitions, 10479 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:38:35,652 INFO L231 Difference]: Finished difference. Result has 391 places, 524 transitions, 9374 flow [2024-06-03 20:38:35,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9078, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9374, PETRI_PLACES=391, PETRI_TRANSITIONS=524} [2024-06-03 20:38:35,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-03 20:38:35,652 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 524 transitions, 9374 flow [2024-06-03 20:38:35,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:35,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:35,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:38:35,655 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)] === [2024-06-03 20:38:35,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash 792392724, now seen corresponding path program 4 times [2024-06-03 20:38:35,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:35,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439902700] [2024-06-03 20:38:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:35,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:35,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439902700] [2024-06-03 20:38:35,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439902700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:35,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:35,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:38:35,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460954533] [2024-06-03 20:38:35,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:35,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:38:35,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:35,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:38:35,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:38:35,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:35,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 524 transitions, 9374 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:35,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:35,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:35,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:38,770 INFO L124 PetriNetUnfolderBase]: 6777/11593 cut-off events. [2024-06-03 20:38:38,770 INFO L125 PetriNetUnfolderBase]: For 2047425/2047425 co-relation queries the response was YES. [2024-06-03 20:38:38,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97874 conditions, 11593 events. 6777/11593 cut-off events. For 2047425/2047425 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 91177 event pairs, 2517 based on Foata normal form. 2/11590 useless extension candidates. Maximal degree in co-relation 97690. Up to 10518 conditions per place. [2024-06-03 20:38:38,920 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 431 selfloop transitions, 110 changer transitions 0/547 dead transitions. [2024-06-03 20:38:38,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 547 transitions, 10558 flow [2024-06-03 20:38:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:38:38,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:38:38,924 INFO L175 Difference]: Start difference. First operand has 391 places, 524 transitions, 9374 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:38:38,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 547 transitions, 10558 flow [2024-06-03 20:38:45,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 547 transitions, 10267 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 20:38:45,464 INFO L231 Difference]: Finished difference. Result has 394 places, 526 transitions, 9362 flow [2024-06-03 20:38:45,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9103, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9362, PETRI_PLACES=394, PETRI_TRANSITIONS=526} [2024-06-03 20:38:45,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-03 20:38:45,465 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 526 transitions, 9362 flow [2024-06-03 20:38:45,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:45,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:45,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:45,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:38:45,467 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)] === [2024-06-03 20:38:45,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:45,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1985645588, now seen corresponding path program 5 times [2024-06-03 20:38:45,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:45,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120586238] [2024-06-03 20:38:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:45,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:45,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:45,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120586238] [2024-06-03 20:38:45,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120586238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:45,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:45,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:38:45,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944980756] [2024-06-03 20:38:45,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:45,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:38:45,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:38:45,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:38:45,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:45,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 526 transitions, 9362 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:45,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:45,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:45,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:48,370 INFO L124 PetriNetUnfolderBase]: 6818/11632 cut-off events. [2024-06-03 20:38:48,371 INFO L125 PetriNetUnfolderBase]: For 2116866/2116866 co-relation queries the response was YES. [2024-06-03 20:38:48,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99099 conditions, 11632 events. 6818/11632 cut-off events. For 2116866/2116866 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 91344 event pairs, 2502 based on Foata normal form. 2/11617 useless extension candidates. Maximal degree in co-relation 98914. Up to 10444 conditions per place. [2024-06-03 20:38:48,714 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 431 selfloop transitions, 113 changer transitions 1/551 dead transitions. [2024-06-03 20:38:48,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 551 transitions, 10786 flow [2024-06-03 20:38:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:38:48,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:38:48,715 INFO L175 Difference]: Start difference. First operand has 394 places, 526 transitions, 9362 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:38:48,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 551 transitions, 10786 flow [2024-06-03 20:38:55,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 551 transitions, 10555 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:38:55,143 INFO L231 Difference]: Finished difference. Result has 397 places, 527 transitions, 9399 flow [2024-06-03 20:38:55,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9131, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9399, PETRI_PLACES=397, PETRI_TRANSITIONS=527} [2024-06-03 20:38:55,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-03 20:38:55,144 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 527 transitions, 9399 flow [2024-06-03 20:38:55,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:55,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:55,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:38:55,145 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)] === [2024-06-03 20:38:55,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:55,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1988502548, now seen corresponding path program 6 times [2024-06-03 20:38:55,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:55,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338272166] [2024-06-03 20:38:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:55,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:55,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338272166] [2024-06-03 20:38:55,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338272166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:55,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:55,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:38:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319889335] [2024-06-03 20:38:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:38:55,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:38:55,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:38:55,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:55,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 527 transitions, 9399 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:38:55,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:55,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:55,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:58,170 INFO L124 PetriNetUnfolderBase]: 6813/11653 cut-off events. [2024-06-03 20:38:58,171 INFO L125 PetriNetUnfolderBase]: For 2145665/2145665 co-relation queries the response was YES. [2024-06-03 20:38:58,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99427 conditions, 11653 events. 6813/11653 cut-off events. For 2145665/2145665 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 91710 event pairs, 2531 based on Foata normal form. 2/11650 useless extension candidates. Maximal degree in co-relation 99240. Up to 10574 conditions per place. [2024-06-03 20:38:58,348 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 433 selfloop transitions, 106 changer transitions 0/545 dead transitions. [2024-06-03 20:38:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 545 transitions, 10521 flow [2024-06-03 20:38:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:38:58,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:38:58,350 INFO L175 Difference]: Start difference. First operand has 397 places, 527 transitions, 9399 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:38:58,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 545 transitions, 10521 flow [2024-06-03 20:39:06,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 545 transitions, 10295 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:39:06,243 INFO L231 Difference]: Finished difference. Result has 400 places, 527 transitions, 9390 flow [2024-06-03 20:39:06,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9173, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9390, PETRI_PLACES=400, PETRI_TRANSITIONS=527} [2024-06-03 20:39:06,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-03 20:39:06,244 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 527 transitions, 9390 flow [2024-06-03 20:39:06,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:39:06,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:06,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:06,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:39:06,245 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)] === [2024-06-03 20:39:06,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1834532974, now seen corresponding path program 1 times [2024-06-03 20:39:06,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:06,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479545331] [2024-06-03 20:39:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:06,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:06,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:06,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479545331] [2024-06-03 20:39:06,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479545331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:06,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:06,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:39:06,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993446257] [2024-06-03 20:39:06,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:06,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:39:06,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:06,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:39:06,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:39:06,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:06,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 527 transitions, 9390 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:39:06,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:06,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:06,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:09,308 INFO L124 PetriNetUnfolderBase]: 6849/11710 cut-off events. [2024-06-03 20:39:09,308 INFO L125 PetriNetUnfolderBase]: For 2230095/2230095 co-relation queries the response was YES. [2024-06-03 20:39:09,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99950 conditions, 11710 events. 6849/11710 cut-off events. For 2230095/2230095 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 92244 event pairs, 2533 based on Foata normal form. 10/11715 useless extension candidates. Maximal degree in co-relation 99762. Up to 10598 conditions per place. [2024-06-03 20:39:09,472 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 437 selfloop transitions, 111 changer transitions 0/554 dead transitions. [2024-06-03 20:39:09,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 554 transitions, 10594 flow [2024-06-03 20:39:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:39:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:39:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:39:09,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:39:09,473 INFO L175 Difference]: Start difference. First operand has 400 places, 527 transitions, 9390 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:39:09,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 554 transitions, 10594 flow [2024-06-03 20:39:16,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 554 transitions, 10371 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:39:16,956 INFO L231 Difference]: Finished difference. Result has 403 places, 529 transitions, 9435 flow [2024-06-03 20:39:16,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9167, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9435, PETRI_PLACES=403, PETRI_TRANSITIONS=529} [2024-06-03 20:39:16,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-03 20:39:16,957 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 529 transitions, 9435 flow [2024-06-03 20:39:16,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 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) [2024-06-03 20:39:16,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:16,957 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] [2024-06-03 20:39:16,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:39:16,957 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)] === [2024-06-03 20:39:16,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:16,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1184534897, now seen corresponding path program 1 times [2024-06-03 20:39:16,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:16,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130186478] [2024-06-03 20:39:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:16,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:17,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:17,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130186478] [2024-06-03 20:39:17,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130186478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:17,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:17,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:39:17,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041225479] [2024-06-03 20:39:17,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:17,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:39:17,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:17,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:39:17,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:39:17,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:17,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 529 transitions, 9435 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:39:17,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:17,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:17,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:19,990 INFO L124 PetriNetUnfolderBase]: 6886/11809 cut-off events. [2024-06-03 20:39:19,991 INFO L125 PetriNetUnfolderBase]: For 2242355/2242365 co-relation queries the response was YES. [2024-06-03 20:39:20,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101336 conditions, 11809 events. 6886/11809 cut-off events. For 2242355/2242365 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 93342 event pairs, 2620 based on Foata normal form. 11/11818 useless extension candidates. Maximal degree in co-relation 101147. Up to 10300 conditions per place. [2024-06-03 20:39:20,158 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 304 selfloop transitions, 256 changer transitions 0/566 dead transitions. [2024-06-03 20:39:20,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 566 transitions, 11320 flow [2024-06-03 20:39:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:39:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:39:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:39:20,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 20:39:20,159 INFO L175 Difference]: Start difference. First operand has 403 places, 529 transitions, 9435 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:39:20,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 566 transitions, 11320 flow [2024-06-03 20:39:27,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 566 transitions, 11078 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:39:27,322 INFO L231 Difference]: Finished difference. Result has 404 places, 544 transitions, 9994 flow [2024-06-03 20:39:27,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9193, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9994, PETRI_PLACES=404, PETRI_TRANSITIONS=544} [2024-06-03 20:39:27,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-03 20:39:27,323 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 544 transitions, 9994 flow [2024-06-03 20:39:27,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:39:27,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:27,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:27,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:39:27,324 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)] === [2024-06-03 20:39:27,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:27,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1854871973, now seen corresponding path program 2 times [2024-06-03 20:39:27,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:27,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258140269] [2024-06-03 20:39:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:27,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:27,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:27,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258140269] [2024-06-03 20:39:27,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258140269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:27,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:27,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:39:27,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024180769] [2024-06-03 20:39:27,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:27,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:39:27,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:27,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:39:27,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:39:27,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:27,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 544 transitions, 9994 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:39:27,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:27,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:27,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:30,328 INFO L124 PetriNetUnfolderBase]: 6891/11771 cut-off events. [2024-06-03 20:39:30,328 INFO L125 PetriNetUnfolderBase]: For 2284449/2284449 co-relation queries the response was YES. [2024-06-03 20:39:30,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102057 conditions, 11771 events. 6891/11771 cut-off events. For 2284449/2284449 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 92629 event pairs, 2581 based on Foata normal form. 1/11767 useless extension candidates. Maximal degree in co-relation 101867. Up to 10306 conditions per place. [2024-06-03 20:39:30,493 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 272 changer transitions 0/573 dead transitions. [2024-06-03 20:39:30,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 573 transitions, 11669 flow [2024-06-03 20:39:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:39:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:39:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:39:30,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-03 20:39:30,495 INFO L175 Difference]: Start difference. First operand has 404 places, 544 transitions, 9994 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:39:30,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 573 transitions, 11669 flow [2024-06-03 20:39:37,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 573 transitions, 11133 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:39:37,988 INFO L231 Difference]: Finished difference. Result has 408 places, 547 transitions, 10053 flow [2024-06-03 20:39:37,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9464, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10053, PETRI_PLACES=408, PETRI_TRANSITIONS=547} [2024-06-03 20:39:37,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-03 20:39:37,988 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 547 transitions, 10053 flow [2024-06-03 20:39:37,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:39:37,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:37,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:37,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:39:37,991 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)] === [2024-06-03 20:39:37,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:37,991 INFO L85 PathProgramCache]: Analyzing trace with hash -258623923, now seen corresponding path program 3 times [2024-06-03 20:39:37,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:37,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134671619] [2024-06-03 20:39:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:37,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:38,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:38,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134671619] [2024-06-03 20:39:38,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134671619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:38,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:38,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:39:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241173076] [2024-06-03 20:39:38,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:38,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:39:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:39:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:39:38,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:38,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 547 transitions, 10053 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:39:38,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:38,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:38,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:41,001 INFO L124 PetriNetUnfolderBase]: 6896/11781 cut-off events. [2024-06-03 20:39:41,001 INFO L125 PetriNetUnfolderBase]: For 2325083/2325083 co-relation queries the response was YES. [2024-06-03 20:39:41,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102589 conditions, 11781 events. 6896/11781 cut-off events. For 2325083/2325083 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 92761 event pairs, 2580 based on Foata normal form. 1/11777 useless extension candidates. Maximal degree in co-relation 102399. Up to 10312 conditions per place. [2024-06-03 20:39:41,172 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 275 changer transitions 0/576 dead transitions. [2024-06-03 20:39:41,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 576 transitions, 11742 flow [2024-06-03 20:39:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:39:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:39:41,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:39:41,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:39:41,174 INFO L175 Difference]: Start difference. First operand has 408 places, 547 transitions, 10053 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:39:41,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 576 transitions, 11742 flow [2024-06-03 20:39:49,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 576 transitions, 11350 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:39:49,855 INFO L231 Difference]: Finished difference. Result has 411 places, 550 transitions, 10266 flow [2024-06-03 20:39:49,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10266, PETRI_PLACES=411, PETRI_TRANSITIONS=550} [2024-06-03 20:39:49,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-03 20:39:49,856 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 550 transitions, 10266 flow [2024-06-03 20:39:49,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:39:49,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:49,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:49,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:39:49,856 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)] === [2024-06-03 20:39:49,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:49,856 INFO L85 PathProgramCache]: Analyzing trace with hash -720679859, now seen corresponding path program 4 times [2024-06-03 20:39:49,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:49,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542708945] [2024-06-03 20:39:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:49,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:50,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:50,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542708945] [2024-06-03 20:39:50,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542708945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:50,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:50,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:39:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601309651] [2024-06-03 20:39:50,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:50,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:39:50,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:39:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:39:50,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:50,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 550 transitions, 10266 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:39:50,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:50,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:50,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:52,892 INFO L124 PetriNetUnfolderBase]: 6901/11816 cut-off events. [2024-06-03 20:39:52,892 INFO L125 PetriNetUnfolderBase]: For 2370631/2370641 co-relation queries the response was YES. [2024-06-03 20:39:53,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103158 conditions, 11816 events. 6901/11816 cut-off events. For 2370631/2370641 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 93285 event pairs, 2609 based on Foata normal form. 6/11820 useless extension candidates. Maximal degree in co-relation 102966. Up to 10318 conditions per place. [2024-06-03 20:39:53,264 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 258 changer transitions 0/573 dead transitions. [2024-06-03 20:39:53,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 573 transitions, 12176 flow [2024-06-03 20:39:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:39:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:39:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:39:53,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:39:53,266 INFO L175 Difference]: Start difference. First operand has 411 places, 550 transitions, 10266 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:39:53,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 573 transitions, 12176 flow [2024-06-03 20:40:00,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 573 transitions, 11608 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:00,547 INFO L231 Difference]: Finished difference. Result has 412 places, 553 transitions, 10288 flow [2024-06-03 20:40:00,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9704, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10288, PETRI_PLACES=412, PETRI_TRANSITIONS=553} [2024-06-03 20:40:00,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-03 20:40:00,548 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 553 transitions, 10288 flow [2024-06-03 20:40:00,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:00,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:00,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:00,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:40:00,548 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)] === [2024-06-03 20:40:00,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1683097253, now seen corresponding path program 5 times [2024-06-03 20:40:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:00,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706101431] [2024-06-03 20:40:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:00,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:00,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706101431] [2024-06-03 20:40:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706101431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810130368] [2024-06-03 20:40:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:00,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:00,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 553 transitions, 10288 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:00,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:00,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:00,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:03,539 INFO L124 PetriNetUnfolderBase]: 6906/11823 cut-off events. [2024-06-03 20:40:03,539 INFO L125 PetriNetUnfolderBase]: For 2409349/2409351 co-relation queries the response was YES. [2024-06-03 20:40:03,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103521 conditions, 11823 events. 6906/11823 cut-off events. For 2409349/2409351 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 93289 event pairs, 2495 based on Foata normal form. 3/11825 useless extension candidates. Maximal degree in co-relation 103328. Up to 10324 conditions per place. [2024-06-03 20:40:03,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 253 changer transitions 0/580 dead transitions. [2024-06-03 20:40:03,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 580 transitions, 12228 flow [2024-06-03 20:40:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-03 20:40:03,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-03 20:40:03,709 INFO L175 Difference]: Start difference. First operand has 412 places, 553 transitions, 10288 flow. Second operand 9 states and 200 transitions. [2024-06-03 20:40:03,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 580 transitions, 12228 flow [2024-06-03 20:40:13,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 580 transitions, 11442 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:13,844 INFO L231 Difference]: Finished difference. Result has 415 places, 556 transitions, 10082 flow [2024-06-03 20:40:13,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9511, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10082, PETRI_PLACES=415, PETRI_TRANSITIONS=556} [2024-06-03 20:40:13,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-03 20:40:13,845 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 556 transitions, 10082 flow [2024-06-03 20:40:13,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:13,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:13,845 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] [2024-06-03 20:40:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:40:13,846 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)] === [2024-06-03 20:40:13,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:13,846 INFO L85 PathProgramCache]: Analyzing trace with hash -712426815, now seen corresponding path program 6 times [2024-06-03 20:40:13,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:13,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289726314] [2024-06-03 20:40:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:13,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:14,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:14,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289726314] [2024-06-03 20:40:14,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289726314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:14,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:14,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:14,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593482725] [2024-06-03 20:40:14,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:14,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:14,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:14,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:14,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 556 transitions, 10082 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:14,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:14,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:14,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand