./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_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/safe023_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe023_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 14:05:31,031 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:05:31,088 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:05:31,094 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:05:31,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:05:31,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:05:31,119 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:05:31,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:05:31,120 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:05:31,124 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:05:31,124 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:05:31,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:05:31,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:05:31,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:05:31,126 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:05:31,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:05:31,126 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:05:31,126 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:05:31,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:05:31,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:05:31,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:05:31,131 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:05:31,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:05:31,131 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:05:31,131 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:05:31,132 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:05:31,132 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:05:31,132 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:05:31,133 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:05:31,133 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:05:31,134 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:05:31,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:05:31,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:05:31,134 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:05:31,135 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:05:31,135 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:05:31,135 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:05:31,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:05:31,135 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:05:31,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:05:31,136 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:05:31,136 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:05:31,136 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:05:31,137 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:05:31,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:05:31,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:05:31,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:05:31,371 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:05:31,372 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:05:31,372 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe023_tso.yml/witness.yml [2024-06-14 14:05:31,542 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:05:31,542 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:05:31,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-14 14:05:32,560 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:05:32,717 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:05:32,717 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-14 14:05:32,727 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c072d47f6/ae5b15b537d74edaa6dc6f74bf646dc1/FLAGe00afed70 [2024-06-14 14:05:32,738 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c072d47f6/ae5b15b537d74edaa6dc6f74bf646dc1 [2024-06-14 14:05:32,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:05:32,739 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:05:32,740 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:05:32,740 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:05:32,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:05:32,744 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:05:31" (1/2) ... [2024-06-14 14:05:32,745 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670326ba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:32, skipping insertion in model container [2024-06-14 14:05:32,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:05:31" (1/2) ... [2024-06-14 14:05:32,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f410076 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:32, skipping insertion in model container [2024-06-14 14:05:32,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:05:32" (2/2) ... [2024-06-14 14:05:32,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670326ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:32, skipping insertion in model container [2024-06-14 14:05:32,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:05:32" (2/2) ... [2024-06-14 14:05:32,747 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:05:32,779 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:05:32,780 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:05:32,780 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:05:32,780 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:05:32,781 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:05:32,781 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-14 14:05:32,802 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:05:33,087 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:05:33,094 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:05:33,214 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:05:33,242 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:05:33,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33 WrapperNode [2024-06-14 14:05:33,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:05:33,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:05:33,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:05:33,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:05:33,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,276 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,317 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-14 14:05:33,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:05:33,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:05:33,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:05:33,319 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:05:33,328 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,338 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,358 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 14:05:33,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,359 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,368 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,374 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:05:33,384 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:05:33,384 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:05:33,384 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:05:33,385 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (1/1) ... [2024-06-14 14:05:33,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:05:33,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:05:33,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 14:05:33,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 14:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:05:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:05:33,439 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:05:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:05:33,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:05:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:05:33,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:05:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:05:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:05:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:05:33,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:05:33,442 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:05:33,574 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:05:33,576 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:05:33,853 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:05:33,853 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:05:33,921 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:05:33,922 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:05:33,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:05:33 BoogieIcfgContainer [2024-06-14 14:05:33,922 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:05:33,924 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:05:33,925 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:05:33,927 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:05:33,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:05:31" (1/4) ... [2024-06-14 14:05:33,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea063f0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:05:33, skipping insertion in model container [2024-06-14 14:05:33,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:05:32" (2/4) ... [2024-06-14 14:05:33,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea063f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:05:33, skipping insertion in model container [2024-06-14 14:05:33,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:33" (3/4) ... [2024-06-14 14:05:33,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea063f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:05:33, skipping insertion in model container [2024-06-14 14:05:33,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:05:33" (4/4) ... [2024-06-14 14:05:33,930 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2024-06-14 14:05:33,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:05:33,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 14:05:33,943 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:05:33,991 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:05:34,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 14:05:34,046 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 14:05:34,047 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:05:34,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:05:34,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 14:05:34,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 14:05:34,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:05:34,069 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;@1619f324, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:05:34,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 14:05:34,074 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:05:34,074 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:05:34,074 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:05:34,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:34,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:05:34,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:34,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-14 14:05:34,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:34,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131632418] [2024-06-14 14:05:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:34,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:34,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:34,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131632418] [2024-06-14 14:05:34,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131632418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:34,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:34,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:05:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306373452] [2024-06-14 14:05:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:34,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:05:34,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:05:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:05:34,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-14 14:05:34,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:34,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:34,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-14 14:05:34,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:34,934 INFO L124 PetriNetUnfolderBase]: 470/795 cut-off events. [2024-06-14 14:05:34,934 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 14:05:34,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 795 events. 470/795 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3833 event pairs, 281 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-14 14:05:34,945 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 29 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 14:05:34,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 167 flow [2024-06-14 14:05:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:05:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:05:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-14 14:05:34,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-14 14:05:34,957 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 87 transitions. [2024-06-14 14:05:34,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 167 flow [2024-06-14 14:05:34,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:34,962 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 14:05:34,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 14:05:34,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 14:05:34,967 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 14:05:34,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:34,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:34,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:34,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:05:34,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:34,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-14 14:05:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:34,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100037731] [2024-06-14 14:05:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:34,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100037731] [2024-06-14 14:05:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100037731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:35,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:35,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:05:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768892330] [2024-06-14 14:05:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:35,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:05:35,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:35,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:05:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:05:35,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:35,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:35,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:35,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:35,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:35,428 INFO L124 PetriNetUnfolderBase]: 781/1325 cut-off events. [2024-06-14 14:05:35,428 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-14 14:05:35,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2969 conditions, 1325 events. 781/1325 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6749 event pairs, 376 based on Foata normal form. 5/1321 useless extension candidates. Maximal degree in co-relation 2954. Up to 1146 conditions per place. [2024-06-14 14:05:35,436 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 44 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-14 14:05:35,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 284 flow [2024-06-14 14:05:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-14 14:05:35,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6726190476190477 [2024-06-14 14:05:35,438 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 113 transitions. [2024-06-14 14:05:35,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 284 flow [2024-06-14 14:05:35,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:35,440 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 173 flow [2024-06-14 14:05:35,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-06-14 14:05:35,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-14 14:05:35,441 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 173 flow [2024-06-14 14:05:35,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:35,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:35,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:35,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:05:35,442 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)] === [2024-06-14 14:05:35,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:35,442 INFO L85 PathProgramCache]: Analyzing trace with hash -263580670, now seen corresponding path program 1 times [2024-06-14 14:05:35,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:35,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226401217] [2024-06-14 14:05:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:35,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:35,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226401217] [2024-06-14 14:05:35,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226401217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:35,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:35,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005612727] [2024-06-14 14:05:35,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:35,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:35,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:35,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:35,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:35,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:35,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:35,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:35,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:35,839 INFO L124 PetriNetUnfolderBase]: 789/1357 cut-off events. [2024-06-14 14:05:35,839 INFO L125 PetriNetUnfolderBase]: For 893/934 co-relation queries the response was YES. [2024-06-14 14:05:35,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1357 events. 789/1357 cut-off events. For 893/934 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7079 event pairs, 265 based on Foata normal form. 15/1360 useless extension candidates. Maximal degree in co-relation 3578. Up to 1114 conditions per place. [2024-06-14 14:05:35,861 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-14 14:05:35,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 405 flow [2024-06-14 14:05:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-14 14:05:35,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-14 14:05:35,875 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 173 flow. Second operand 5 states and 140 transitions. [2024-06-14 14:05:35,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 405 flow [2024-06-14 14:05:35,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 403 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:35,878 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 248 flow [2024-06-14 14:05:35,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-14 14:05:35,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 14:05:35,879 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 248 flow [2024-06-14 14:05:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:35,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:35,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:35,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:05:35,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:35,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash -364981210, now seen corresponding path program 1 times [2024-06-14 14:05:35,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:35,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079881504] [2024-06-14 14:05:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:35,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:36,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079881504] [2024-06-14 14:05:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079881504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:36,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:36,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:05:36,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322690357] [2024-06-14 14:05:36,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:36,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:05:36,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:05:36,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:05:36,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:36,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 248 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) [2024-06-14 14:05:36,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:36,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:36,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:36,304 INFO L124 PetriNetUnfolderBase]: 773/1297 cut-off events. [2024-06-14 14:05:36,304 INFO L125 PetriNetUnfolderBase]: For 1645/1660 co-relation queries the response was YES. [2024-06-14 14:05:36,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 1297 events. 773/1297 cut-off events. For 1645/1660 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6615 event pairs, 312 based on Foata normal form. 15/1305 useless extension candidates. Maximal degree in co-relation 3927. Up to 1140 conditions per place. [2024-06-14 14:05:36,312 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-14 14:05:36,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 401 flow [2024-06-14 14:05:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-14 14:05:36,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-14 14:05:36,314 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 248 flow. Second operand 4 states and 107 transitions. [2024-06-14 14:05:36,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 401 flow [2024-06-14 14:05:36,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 387 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:36,317 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 287 flow [2024-06-14 14:05:36,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-14 14:05:36,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-14 14:05:36,318 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 287 flow [2024-06-14 14:05:36,318 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) [2024-06-14 14:05:36,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:36,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:36,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:05:36,319 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:36,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:36,319 INFO L85 PathProgramCache]: Analyzing trace with hash -848364989, now seen corresponding path program 1 times [2024-06-14 14:05:36,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:36,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078886013] [2024-06-14 14:05:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:36,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:36,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:36,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078886013] [2024-06-14 14:05:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078886013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:36,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:36,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:36,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435328198] [2024-06-14 14:05:36,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:36,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:36,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:36,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:36,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:36,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:36,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:36,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:36,776 INFO L124 PetriNetUnfolderBase]: 781/1330 cut-off events. [2024-06-14 14:05:36,777 INFO L125 PetriNetUnfolderBase]: For 2266/2340 co-relation queries the response was YES. [2024-06-14 14:05:36,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4191 conditions, 1330 events. 781/1330 cut-off events. For 2266/2340 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6821 event pairs, 210 based on Foata normal form. 30/1350 useless extension candidates. Maximal degree in co-relation 4166. Up to 1064 conditions per place. [2024-06-14 14:05:36,785 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 56 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-14 14:05:36,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 537 flow [2024-06-14 14:05:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-14 14:05:36,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-14 14:05:36,787 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 287 flow. Second operand 6 states and 162 transitions. [2024-06-14 14:05:36,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 537 flow [2024-06-14 14:05:36,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 527 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:36,790 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 343 flow [2024-06-14 14:05:36,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-14 14:05:36,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-14 14:05:36,791 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 343 flow [2024-06-14 14:05:36,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:36,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:36,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:36,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:05:36,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:36,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:36,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1570485163, now seen corresponding path program 1 times [2024-06-14 14:05:36,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:36,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790741894] [2024-06-14 14:05:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:36,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:37,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:37,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790741894] [2024-06-14 14:05:37,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790741894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:37,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:37,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:37,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175909235] [2024-06-14 14:05:37,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:37,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:37,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:37,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:37,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:37,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:37,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:37,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:37,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:37,230 INFO L124 PetriNetUnfolderBase]: 955/1562 cut-off events. [2024-06-14 14:05:37,231 INFO L125 PetriNetUnfolderBase]: For 3564/3564 co-relation queries the response was YES. [2024-06-14 14:05:37,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 1562 events. 955/1562 cut-off events. For 3564/3564 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7919 event pairs, 342 based on Foata normal form. 4/1558 useless extension candidates. Maximal degree in co-relation 5325. Up to 1371 conditions per place. [2024-06-14 14:05:37,241 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 67 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-06-14 14:05:37,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 677 flow [2024-06-14 14:05:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 14:05:37,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-14 14:05:37,242 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 343 flow. Second operand 5 states and 128 transitions. [2024-06-14 14:05:37,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 677 flow [2024-06-14 14:05:37,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 615 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:37,248 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 446 flow [2024-06-14 14:05:37,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2024-06-14 14:05:37,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-14 14:05:37,249 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 446 flow [2024-06-14 14:05:37,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:37,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:37,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:37,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:05:37,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:37,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1727404290, now seen corresponding path program 1 times [2024-06-14 14:05:37,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:37,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837245171] [2024-06-14 14:05:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:37,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:37,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:37,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837245171] [2024-06-14 14:05:37,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837245171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:37,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:37,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:37,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830282494] [2024-06-14 14:05:37,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:37,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:37,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:37,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:37,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:37,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:37,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:37,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:37,655 INFO L124 PetriNetUnfolderBase]: 966/1590 cut-off events. [2024-06-14 14:05:37,655 INFO L125 PetriNetUnfolderBase]: For 4475/4481 co-relation queries the response was YES. [2024-06-14 14:05:37,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5799 conditions, 1590 events. 966/1590 cut-off events. For 4475/4481 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8096 event pairs, 346 based on Foata normal form. 6/1588 useless extension candidates. Maximal degree in co-relation 5769. Up to 1383 conditions per place. [2024-06-14 14:05:37,666 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 69 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-06-14 14:05:37,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 723 flow [2024-06-14 14:05:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 14:05:37,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:05:37,667 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 446 flow. Second operand 5 states and 126 transitions. [2024-06-14 14:05:37,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 723 flow [2024-06-14 14:05:37,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 717 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:37,672 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 521 flow [2024-06-14 14:05:37,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-14 14:05:37,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-14 14:05:37,673 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 521 flow [2024-06-14 14:05:37,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:37,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:37,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:37,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:05:37,674 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:37,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:37,674 INFO L85 PathProgramCache]: Analyzing trace with hash -761795358, now seen corresponding path program 2 times [2024-06-14 14:05:37,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:37,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970600770] [2024-06-14 14:05:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:37,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:37,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970600770] [2024-06-14 14:05:37,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970600770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:37,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:37,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467224025] [2024-06-14 14:05:37,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:37,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:37,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:37,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:37,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:37,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:37,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:37,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:38,086 INFO L124 PetriNetUnfolderBase]: 961/1587 cut-off events. [2024-06-14 14:05:38,086 INFO L125 PetriNetUnfolderBase]: For 5423/5429 co-relation queries the response was YES. [2024-06-14 14:05:38,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 1587 events. 961/1587 cut-off events. For 5423/5429 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8071 event pairs, 343 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 5992. Up to 1378 conditions per place. [2024-06-14 14:05:38,097 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 20 changer transitions 0/95 dead transitions. [2024-06-14 14:05:38,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 760 flow [2024-06-14 14:05:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 14:05:38,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-14 14:05:38,098 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 521 flow. Second operand 5 states and 129 transitions. [2024-06-14 14:05:38,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 760 flow [2024-06-14 14:05:38,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 741 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:38,105 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 580 flow [2024-06-14 14:05:38,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=580, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 14:05:38,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-14 14:05:38,106 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 580 flow [2024-06-14 14:05:38,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:38,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:38,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:38,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:05:38,107 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:38,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1702746890, now seen corresponding path program 1 times [2024-06-14 14:05:38,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:38,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37492163] [2024-06-14 14:05:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:38,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:38,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:38,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37492163] [2024-06-14 14:05:38,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37492163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:38,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:38,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:38,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562145904] [2024-06-14 14:05:38,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:38,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:38,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:38,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:38,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 580 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:38,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:38,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:38,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:38,592 INFO L124 PetriNetUnfolderBase]: 970/1591 cut-off events. [2024-06-14 14:05:38,592 INFO L125 PetriNetUnfolderBase]: For 6620/6620 co-relation queries the response was YES. [2024-06-14 14:05:38,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 1591 events. 970/1591 cut-off events. For 6620/6620 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8073 event pairs, 316 based on Foata normal form. 8/1591 useless extension candidates. Maximal degree in co-relation 6197. Up to 1357 conditions per place. [2024-06-14 14:05:38,604 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 70 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2024-06-14 14:05:38,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 834 flow [2024-06-14 14:05:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:05:38,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:05:38,605 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 580 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:05:38,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 834 flow [2024-06-14 14:05:38,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 810 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:38,615 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 634 flow [2024-06-14 14:05:38,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-14 14:05:38,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-14 14:05:38,616 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 634 flow [2024-06-14 14:05:38,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:38,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:38,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:38,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:05:38,616 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:38,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash -512207174, now seen corresponding path program 1 times [2024-06-14 14:05:38,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:38,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761895827] [2024-06-14 14:05:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:38,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:38,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:38,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761895827] [2024-06-14 14:05:38,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761895827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:38,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:38,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535774706] [2024-06-14 14:05:38,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:38,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:38,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:38,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:38,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:38,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:38,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:38,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:39,137 INFO L124 PetriNetUnfolderBase]: 925/1553 cut-off events. [2024-06-14 14:05:39,137 INFO L125 PetriNetUnfolderBase]: For 8783/8816 co-relation queries the response was YES. [2024-06-14 14:05:39,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 1553 events. 925/1553 cut-off events. For 8783/8816 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8064 event pairs, 282 based on Foata normal form. 33/1535 useless extension candidates. Maximal degree in co-relation 6451. Up to 1281 conditions per place. [2024-06-14 14:05:39,147 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 25 changer transitions 0/108 dead transitions. [2024-06-14 14:05:39,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 108 transitions, 900 flow [2024-06-14 14:05:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:05:39,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-14 14:05:39,149 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 634 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:05:39,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 108 transitions, 900 flow [2024-06-14 14:05:39,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 846 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:39,163 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 660 flow [2024-06-14 14:05:39,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=660, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-14 14:05:39,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-14 14:05:39,164 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 660 flow [2024-06-14 14:05:39,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:39,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:39,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:39,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:05:39,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:39,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash 727180166, now seen corresponding path program 2 times [2024-06-14 14:05:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:39,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93912935] [2024-06-14 14:05:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:39,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:39,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:39,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93912935] [2024-06-14 14:05:39,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93912935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:39,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:39,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:39,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735863996] [2024-06-14 14:05:39,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:39,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:39,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:39,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:39,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 660 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:39,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:39,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:39,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:39,670 INFO L124 PetriNetUnfolderBase]: 917/1534 cut-off events. [2024-06-14 14:05:39,670 INFO L125 PetriNetUnfolderBase]: For 9738/9777 co-relation queries the response was YES. [2024-06-14 14:05:39,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6532 conditions, 1534 events. 917/1534 cut-off events. For 9738/9777 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7966 event pairs, 284 based on Foata normal form. 40/1521 useless extension candidates. Maximal degree in co-relation 6492. Up to 1258 conditions per place. [2024-06-14 14:05:39,683 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-14 14:05:39,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 109 transitions, 914 flow [2024-06-14 14:05:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:05:39,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 14:05:39,685 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 660 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:05:39,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 109 transitions, 914 flow [2024-06-14 14:05:39,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 864 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:39,695 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 675 flow [2024-06-14 14:05:39,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-06-14 14:05:39,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-14 14:05:39,696 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 675 flow [2024-06-14 14:05:39,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:39,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:39,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:39,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:05:39,697 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:39,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:39,697 INFO L85 PathProgramCache]: Analyzing trace with hash 608205135, now seen corresponding path program 1 times [2024-06-14 14:05:39,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:39,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366266451] [2024-06-14 14:05:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:39,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:39,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:39,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366266451] [2024-06-14 14:05:39,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366266451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:39,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:39,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:39,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288612620] [2024-06-14 14:05:39,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:39,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:39,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:39,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:39,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:40,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:40,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 675 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:40,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:40,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:40,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:40,284 INFO L124 PetriNetUnfolderBase]: 1005/1663 cut-off events. [2024-06-14 14:05:40,284 INFO L125 PetriNetUnfolderBase]: For 10565/10571 co-relation queries the response was YES. [2024-06-14 14:05:40,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7022 conditions, 1663 events. 1005/1663 cut-off events. For 10565/10571 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8528 event pairs, 315 based on Foata normal form. 2/1658 useless extension candidates. Maximal degree in co-relation 6981. Up to 1381 conditions per place. [2024-06-14 14:05:40,296 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 30 changer transitions 0/126 dead transitions. [2024-06-14 14:05:40,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1110 flow [2024-06-14 14:05:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:05:40,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-14 14:05:40,297 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 675 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:05:40,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1110 flow [2024-06-14 14:05:40,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 1018 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:40,311 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 747 flow [2024-06-14 14:05:40,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=747, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-14 14:05:40,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-14 14:05:40,313 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 747 flow [2024-06-14 14:05:40,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:40,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:40,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:40,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:05:40,314 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:40,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1067956841, now seen corresponding path program 2 times [2024-06-14 14:05:40,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:40,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462058789] [2024-06-14 14:05:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:40,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:40,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:40,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462058789] [2024-06-14 14:05:40,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462058789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:40,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:40,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:40,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469171641] [2024-06-14 14:05:40,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:40,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:40,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:40,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:40,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:40,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:40,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 747 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:40,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:40,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:40,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:40,882 INFO L124 PetriNetUnfolderBase]: 1016/1671 cut-off events. [2024-06-14 14:05:40,882 INFO L125 PetriNetUnfolderBase]: For 12073/12073 co-relation queries the response was YES. [2024-06-14 14:05:40,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7455 conditions, 1671 events. 1016/1671 cut-off events. For 12073/12073 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8541 event pairs, 312 based on Foata normal form. 2/1665 useless extension candidates. Maximal degree in co-relation 7412. Up to 1368 conditions per place. [2024-06-14 14:05:40,893 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 40 changer transitions 0/142 dead transitions. [2024-06-14 14:05:40,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 142 transitions, 1270 flow [2024-06-14 14:05:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 14:05:40,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:05:40,895 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 747 flow. Second operand 9 states and 219 transitions. [2024-06-14 14:05:40,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 142 transitions, 1270 flow [2024-06-14 14:05:40,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 142 transitions, 1231 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:40,916 INFO L231 Difference]: Finished difference. Result has 94 places, 103 transitions, 872 flow [2024-06-14 14:05:40,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=872, PETRI_PLACES=94, PETRI_TRANSITIONS=103} [2024-06-14 14:05:40,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-14 14:05:40,917 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 103 transitions, 872 flow [2024-06-14 14:05:40,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:40,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:40,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:40,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:05:40,918 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:40,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:40,918 INFO L85 PathProgramCache]: Analyzing trace with hash 755814735, now seen corresponding path program 3 times [2024-06-14 14:05:40,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:40,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58412410] [2024-06-14 14:05:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:41,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58412410] [2024-06-14 14:05:41,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58412410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:41,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:41,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:41,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541369491] [2024-06-14 14:05:41,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:41,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:41,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:41,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:41,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 103 transitions, 872 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:41,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:41,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:41,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:41,412 INFO L124 PetriNetUnfolderBase]: 1011/1664 cut-off events. [2024-06-14 14:05:41,412 INFO L125 PetriNetUnfolderBase]: For 13939/13939 co-relation queries the response was YES. [2024-06-14 14:05:41,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7897 conditions, 1664 events. 1011/1664 cut-off events. For 13939/13939 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8506 event pairs, 312 based on Foata normal form. 2/1658 useless extension candidates. Maximal degree in co-relation 7851. Up to 1363 conditions per place. [2024-06-14 14:05:41,423 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 91 selfloop transitions, 38 changer transitions 0/136 dead transitions. [2024-06-14 14:05:41,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1267 flow [2024-06-14 14:05:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:05:41,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 14:05:41,425 INFO L175 Difference]: Start difference. First operand has 94 places, 103 transitions, 872 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:05:41,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1267 flow [2024-06-14 14:05:41,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 1202 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:41,442 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 891 flow [2024-06-14 14:05:41,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-14 14:05:41,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-14 14:05:41,444 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 891 flow [2024-06-14 14:05:41,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:41,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:41,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:41,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:05:41,444 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)] === [2024-06-14 14:05:41,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1396806331, now seen corresponding path program 4 times [2024-06-14 14:05:41,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:41,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939457739] [2024-06-14 14:05:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:41,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:41,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939457739] [2024-06-14 14:05:41,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939457739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:41,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:41,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872025203] [2024-06-14 14:05:41,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:41,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:41,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:41,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:41,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 891 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:41,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:41,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:41,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:41,912 INFO L124 PetriNetUnfolderBase]: 1022/1696 cut-off events. [2024-06-14 14:05:41,912 INFO L125 PetriNetUnfolderBase]: For 15255/15261 co-relation queries the response was YES. [2024-06-14 14:05:41,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8035 conditions, 1696 events. 1022/1696 cut-off events. For 15255/15261 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8770 event pairs, 309 based on Foata normal form. 2/1691 useless extension candidates. Maximal degree in co-relation 7987. Up to 1375 conditions per place. [2024-06-14 14:05:41,923 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 41 changer transitions 0/138 dead transitions. [2024-06-14 14:05:41,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 138 transitions, 1320 flow [2024-06-14 14:05:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:05:41,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 14:05:41,926 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 891 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:05:41,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 138 transitions, 1320 flow [2024-06-14 14:05:41,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 1210 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:41,948 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 915 flow [2024-06-14 14:05:41,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=915, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2024-06-14 14:05:41,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-14 14:05:41,949 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 915 flow [2024-06-14 14:05:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:41,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:41,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:41,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:05:41,949 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:41,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:41,950 INFO L85 PathProgramCache]: Analyzing trace with hash -52293399, now seen corresponding path program 5 times [2024-06-14 14:05:41,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:41,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011528981] [2024-06-14 14:05:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:41,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:42,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:42,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011528981] [2024-06-14 14:05:42,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011528981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:42,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:42,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975343695] [2024-06-14 14:05:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:42,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:42,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:42,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:42,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 915 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:42,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:42,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:42,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:42,438 INFO L124 PetriNetUnfolderBase]: 1033/1713 cut-off events. [2024-06-14 14:05:42,439 INFO L125 PetriNetUnfolderBase]: For 17329/17335 co-relation queries the response was YES. [2024-06-14 14:05:42,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8182 conditions, 1713 events. 1033/1713 cut-off events. For 17329/17335 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8876 event pairs, 312 based on Foata normal form. 6/1711 useless extension candidates. Maximal degree in co-relation 8133. Up to 1387 conditions per place. [2024-06-14 14:05:42,451 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 45 changer transitions 0/143 dead transitions. [2024-06-14 14:05:42,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 143 transitions, 1365 flow [2024-06-14 14:05:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 14:05:42,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 14:05:42,452 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 915 flow. Second operand 8 states and 193 transitions. [2024-06-14 14:05:42,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 143 transitions, 1365 flow [2024-06-14 14:05:42,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 143 transitions, 1273 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:42,472 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 959 flow [2024-06-14 14:05:42,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=959, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2024-06-14 14:05:42,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-14 14:05:42,473 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 959 flow [2024-06-14 14:05:42,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:42,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:42,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:42,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:05:42,474 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:42,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2028921553, now seen corresponding path program 6 times [2024-06-14 14:05:42,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:42,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585558241] [2024-06-14 14:05:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:42,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:42,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:42,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585558241] [2024-06-14 14:05:42,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585558241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:42,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:42,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:42,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815881320] [2024-06-14 14:05:42,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:42,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:42,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:42,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:42,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:42,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 959 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:42,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:42,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:42,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:42,963 INFO L124 PetriNetUnfolderBase]: 1028/1710 cut-off events. [2024-06-14 14:05:42,963 INFO L125 PetriNetUnfolderBase]: For 18671/18677 co-relation queries the response was YES. [2024-06-14 14:05:42,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8247 conditions, 1710 events. 1028/1710 cut-off events. For 18671/18677 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8855 event pairs, 309 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8197. Up to 1382 conditions per place. [2024-06-14 14:05:42,975 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 46 changer transitions 0/148 dead transitions. [2024-06-14 14:05:42,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1335 flow [2024-06-14 14:05:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 14:05:42,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:05:42,977 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 959 flow. Second operand 9 states and 219 transitions. [2024-06-14 14:05:42,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1335 flow [2024-06-14 14:05:42,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 1270 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:42,999 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 994 flow [2024-06-14 14:05:42,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=994, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2024-06-14 14:05:43,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-14 14:05:43,000 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 994 flow [2024-06-14 14:05:43,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:43,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:43,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:05:43,000 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:43,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2028913617, now seen corresponding path program 1 times [2024-06-14 14:05:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:43,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831613587] [2024-06-14 14:05:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:43,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:43,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831613587] [2024-06-14 14:05:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831613587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:43,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:43,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:43,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533813456] [2024-06-14 14:05:43,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:43,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:43,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:43,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:43,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:43,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:43,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 994 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:43,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:43,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:43,480 INFO L124 PetriNetUnfolderBase]: 1045/1737 cut-off events. [2024-06-14 14:05:43,481 INFO L125 PetriNetUnfolderBase]: For 21148/21154 co-relation queries the response was YES. [2024-06-14 14:05:43,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8508 conditions, 1737 events. 1045/1737 cut-off events. For 21148/21154 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8987 event pairs, 309 based on Foata normal form. 4/1734 useless extension candidates. Maximal degree in co-relation 8457. Up to 1487 conditions per place. [2024-06-14 14:05:43,495 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 107 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-06-14 14:05:43,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 136 transitions, 1326 flow [2024-06-14 14:05:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 14:05:43,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:05:43,497 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 994 flow. Second operand 6 states and 150 transitions. [2024-06-14 14:05:43,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 136 transitions, 1326 flow [2024-06-14 14:05:43,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 136 transitions, 1214 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:43,525 INFO L231 Difference]: Finished difference. Result has 105 places, 113 transitions, 953 flow [2024-06-14 14:05:43,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=953, PETRI_PLACES=105, PETRI_TRANSITIONS=113} [2024-06-14 14:05:43,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-14 14:05:43,525 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 113 transitions, 953 flow [2024-06-14 14:05:43,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:43,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:43,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:05:43,526 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:43,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1933722735, now seen corresponding path program 2 times [2024-06-14 14:05:43,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:43,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132716615] [2024-06-14 14:05:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:43,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:43,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:43,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132716615] [2024-06-14 14:05:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132716615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:43,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:43,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:43,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706312632] [2024-06-14 14:05:43,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:43,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:43,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:43,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:43,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:43,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 113 transitions, 953 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:43,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:43,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:44,006 INFO L124 PetriNetUnfolderBase]: 1062/1765 cut-off events. [2024-06-14 14:05:44,006 INFO L125 PetriNetUnfolderBase]: For 23440/23446 co-relation queries the response was YES. [2024-06-14 14:05:44,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8741 conditions, 1765 events. 1062/1765 cut-off events. For 23440/23446 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9214 event pairs, 317 based on Foata normal form. 8/1765 useless extension candidates. Maximal degree in co-relation 8689. Up to 1514 conditions per place. [2024-06-14 14:05:44,020 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 108 selfloop transitions, 20 changer transitions 0/135 dead transitions. [2024-06-14 14:05:44,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 1279 flow [2024-06-14 14:05:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:05:44,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-14 14:05:44,021 INFO L175 Difference]: Start difference. First operand has 105 places, 113 transitions, 953 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:05:44,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 1279 flow [2024-06-14 14:05:44,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1226 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:44,047 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 971 flow [2024-06-14 14:05:44,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=971, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-06-14 14:05:44,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-14 14:05:44,048 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 971 flow [2024-06-14 14:05:44,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:44,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:44,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:44,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:05:44,049 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:44,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -42762263, now seen corresponding path program 3 times [2024-06-14 14:05:44,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:44,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131097053] [2024-06-14 14:05:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:44,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:44,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:44,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131097053] [2024-06-14 14:05:44,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131097053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:44,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:44,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141008281] [2024-06-14 14:05:44,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:44,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:44,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:44,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:44,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 971 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:44,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:44,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:44,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:44,483 INFO L124 PetriNetUnfolderBase]: 1054/1752 cut-off events. [2024-06-14 14:05:44,483 INFO L125 PetriNetUnfolderBase]: For 25184/25190 co-relation queries the response was YES. [2024-06-14 14:05:44,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8807 conditions, 1752 events. 1054/1752 cut-off events. For 25184/25190 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9145 event pairs, 286 based on Foata normal form. 8/1752 useless extension candidates. Maximal degree in co-relation 8754. Up to 1425 conditions per place. [2024-06-14 14:05:44,495 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 105 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-06-14 14:05:44,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 138 transitions, 1309 flow [2024-06-14 14:05:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:05:44,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:05:44,499 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 971 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:05:44,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 138 transitions, 1309 flow [2024-06-14 14:05:44,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 138 transitions, 1256 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:44,527 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 1005 flow [2024-06-14 14:05:44,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1005, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-06-14 14:05:44,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-14 14:05:44,528 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 1005 flow [2024-06-14 14:05:44,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:44,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:44,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:44,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:05:44,528 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:44,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:44,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1692425491, now seen corresponding path program 1 times [2024-06-14 14:05:44,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:44,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836937864] [2024-06-14 14:05:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:44,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:44,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:44,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836937864] [2024-06-14 14:05:44,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836937864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:44,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:44,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:44,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784819271] [2024-06-14 14:05:44,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:44,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:44,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:44,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:44,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:44,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 1005 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:44,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:44,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:44,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:45,149 INFO L124 PetriNetUnfolderBase]: 1055/1778 cut-off events. [2024-06-14 14:05:45,154 INFO L125 PetriNetUnfolderBase]: For 30598/30632 co-relation queries the response was YES. [2024-06-14 14:05:45,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 1778 events. 1055/1778 cut-off events. For 30598/30632 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9550 event pairs, 179 based on Foata normal form. 10/1730 useless extension candidates. Maximal degree in co-relation 9244. Up to 1353 conditions per place. [2024-06-14 14:05:45,209 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 37 changer transitions 0/158 dead transitions. [2024-06-14 14:05:45,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 1471 flow [2024-06-14 14:05:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 14:05:45,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 14:05:45,211 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 1005 flow. Second operand 8 states and 204 transitions. [2024-06-14 14:05:45,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 1471 flow [2024-06-14 14:05:45,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 158 transitions, 1402 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:45,237 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 1053 flow [2024-06-14 14:05:45,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1053, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2024-06-14 14:05:45,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-14 14:05:45,238 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 1053 flow [2024-06-14 14:05:45,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:45,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:45,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:45,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:05:45,239 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:45,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:45,239 INFO L85 PathProgramCache]: Analyzing trace with hash -785006771, now seen corresponding path program 2 times [2024-06-14 14:05:45,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:45,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788502725] [2024-06-14 14:05:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:45,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:45,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:45,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788502725] [2024-06-14 14:05:45,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788502725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:45,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588659615] [2024-06-14 14:05:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:45,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:45,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:45,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:45,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 1053 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:45,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:45,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:45,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:45,798 INFO L124 PetriNetUnfolderBase]: 1043/1758 cut-off events. [2024-06-14 14:05:45,798 INFO L125 PetriNetUnfolderBase]: For 32326/32361 co-relation queries the response was YES. [2024-06-14 14:05:45,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9363 conditions, 1758 events. 1043/1758 cut-off events. For 32326/32361 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9409 event pairs, 246 based on Foata normal form. 8/1707 useless extension candidates. Maximal degree in co-relation 9308. Up to 1409 conditions per place. [2024-06-14 14:05:45,810 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-06-14 14:05:45,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 155 transitions, 1395 flow [2024-06-14 14:05:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:05:45,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-14 14:05:45,811 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 1053 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:05:45,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 155 transitions, 1395 flow [2024-06-14 14:05:45,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 155 transitions, 1335 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:45,836 INFO L231 Difference]: Finished difference. Result has 117 places, 121 transitions, 1075 flow [2024-06-14 14:05:45,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1075, PETRI_PLACES=117, PETRI_TRANSITIONS=121} [2024-06-14 14:05:45,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-14 14:05:45,837 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 121 transitions, 1075 flow [2024-06-14 14:05:45,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:45,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:45,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:45,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:05:45,837 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:45,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1259509531, now seen corresponding path program 3 times [2024-06-14 14:05:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:45,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129523393] [2024-06-14 14:05:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:46,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:46,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129523393] [2024-06-14 14:05:46,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129523393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:46,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:46,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:46,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588934439] [2024-06-14 14:05:46,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:46,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:46,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:46,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:46,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:46,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:46,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 121 transitions, 1075 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:46,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:46,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:46,381 INFO L124 PetriNetUnfolderBase]: 1031/1732 cut-off events. [2024-06-14 14:05:46,381 INFO L125 PetriNetUnfolderBase]: For 33642/33671 co-relation queries the response was YES. [2024-06-14 14:05:46,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9329 conditions, 1732 events. 1031/1732 cut-off events. For 33642/33671 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9221 event pairs, 244 based on Foata normal form. 6/1678 useless extension candidates. Maximal degree in co-relation 9272. Up to 1392 conditions per place. [2024-06-14 14:05:46,394 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 90 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-14 14:05:46,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 154 transitions, 1427 flow [2024-06-14 14:05:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:05:46,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 14:05:46,396 INFO L175 Difference]: Start difference. First operand has 117 places, 121 transitions, 1075 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:05:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 154 transitions, 1427 flow [2024-06-14 14:05:46,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1344 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:46,426 INFO L231 Difference]: Finished difference. Result has 118 places, 123 transitions, 1098 flow [2024-06-14 14:05:46,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=118, PETRI_TRANSITIONS=123} [2024-06-14 14:05:46,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-14 14:05:46,427 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 123 transitions, 1098 flow [2024-06-14 14:05:46,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:46,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:46,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:05:46,427 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:46,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1063539590, now seen corresponding path program 1 times [2024-06-14 14:05:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:46,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891182209] [2024-06-14 14:05:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:46,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:46,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891182209] [2024-06-14 14:05:46,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891182209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:46,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:46,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850665479] [2024-06-14 14:05:46,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:46,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:46,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:46,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:46,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:46,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:46,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 123 transitions, 1098 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:46,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:46,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:46,917 INFO L124 PetriNetUnfolderBase]: 1119/1867 cut-off events. [2024-06-14 14:05:46,917 INFO L125 PetriNetUnfolderBase]: For 33407/33413 co-relation queries the response was YES. [2024-06-14 14:05:46,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 1867 events. 1119/1867 cut-off events. For 33407/33413 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9895 event pairs, 280 based on Foata normal form. 6/1868 useless extension candidates. Maximal degree in co-relation 9912. Up to 1590 conditions per place. [2024-06-14 14:05:46,954 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 34 changer transitions 0/157 dead transitions. [2024-06-14 14:05:46,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 157 transitions, 1705 flow [2024-06-14 14:05:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:05:46,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:05:46,956 INFO L175 Difference]: Start difference. First operand has 118 places, 123 transitions, 1098 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:05:46,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 157 transitions, 1705 flow [2024-06-14 14:05:46,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 157 transitions, 1611 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:46,993 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 1287 flow [2024-06-14 14:05:46,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1287, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-06-14 14:05:46,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 14:05:46,994 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 1287 flow [2024-06-14 14:05:46,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:46,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:46,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:05:46,995 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:46,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:46,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1603426650, now seen corresponding path program 2 times [2024-06-14 14:05:46,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:46,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541258255] [2024-06-14 14:05:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:46,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:47,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541258255] [2024-06-14 14:05:47,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541258255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:47,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:47,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:47,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182848581] [2024-06-14 14:05:47,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:47,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:47,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:47,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:47,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:47,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:47,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 1287 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:47,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:47,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:47,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:47,481 INFO L124 PetriNetUnfolderBase]: 1147/1909 cut-off events. [2024-06-14 14:05:47,481 INFO L125 PetriNetUnfolderBase]: For 36483/36483 co-relation queries the response was YES. [2024-06-14 14:05:47,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10599 conditions, 1909 events. 1147/1909 cut-off events. For 36483/36483 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10066 event pairs, 270 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 10538. Up to 1648 conditions per place. [2024-06-14 14:05:47,497 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 34 changer transitions 0/166 dead transitions. [2024-06-14 14:05:47,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 166 transitions, 1802 flow [2024-06-14 14:05:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-14 14:05:47,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-14 14:05:47,498 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 1287 flow. Second operand 5 states and 132 transitions. [2024-06-14 14:05:47,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 166 transitions, 1802 flow [2024-06-14 14:05:47,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 166 transitions, 1762 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:47,547 INFO L231 Difference]: Finished difference. Result has 126 places, 147 transitions, 1473 flow [2024-06-14 14:05:47,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1473, PETRI_PLACES=126, PETRI_TRANSITIONS=147} [2024-06-14 14:05:47,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-14 14:05:47,548 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 147 transitions, 1473 flow [2024-06-14 14:05:47,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:47,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:47,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:47,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:05:47,549 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:47,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash -536055482, now seen corresponding path program 3 times [2024-06-14 14:05:47,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:47,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348403643] [2024-06-14 14:05:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:47,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:47,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:47,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348403643] [2024-06-14 14:05:47,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348403643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:47,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:47,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:47,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103426146] [2024-06-14 14:05:47,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:47,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:47,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:47,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:47,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 147 transitions, 1473 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:47,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:47,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:47,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:48,030 INFO L124 PetriNetUnfolderBase]: 1149/1917 cut-off events. [2024-06-14 14:05:48,030 INFO L125 PetriNetUnfolderBase]: For 39723/39729 co-relation queries the response was YES. [2024-06-14 14:05:48,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10889 conditions, 1917 events. 1149/1917 cut-off events. For 39723/39729 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10182 event pairs, 282 based on Foata normal form. 6/1918 useless extension candidates. Maximal degree in co-relation 10824. Up to 1622 conditions per place. [2024-06-14 14:05:48,047 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 115 selfloop transitions, 45 changer transitions 0/167 dead transitions. [2024-06-14 14:05:48,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 167 transitions, 1977 flow [2024-06-14 14:05:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 14:05:48,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:05:48,053 INFO L175 Difference]: Start difference. First operand has 126 places, 147 transitions, 1473 flow. Second operand 5 states and 130 transitions. [2024-06-14 14:05:48,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 167 transitions, 1977 flow [2024-06-14 14:05:48,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 167 transitions, 1928 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:48,175 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1568 flow [2024-06-14 14:05:48,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1568, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-14 14:05:48,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-14 14:05:48,176 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1568 flow [2024-06-14 14:05:48,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:48,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:48,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:05:48,176 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:48,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 236855980, now seen corresponding path program 1 times [2024-06-14 14:05:48,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:48,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794520742] [2024-06-14 14:05:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:48,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:48,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:48,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794520742] [2024-06-14 14:05:48,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794520742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:48,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:48,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:48,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086084579] [2024-06-14 14:05:48,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:48,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:48,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:48,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:48,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1568 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:48,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:48,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:48,697 INFO L124 PetriNetUnfolderBase]: 1167/1944 cut-off events. [2024-06-14 14:05:48,697 INFO L125 PetriNetUnfolderBase]: For 43429/43429 co-relation queries the response was YES. [2024-06-14 14:05:48,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11226 conditions, 1944 events. 1167/1944 cut-off events. For 43429/43429 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10351 event pairs, 292 based on Foata normal form. 2/1938 useless extension candidates. Maximal degree in co-relation 11160. Up to 1629 conditions per place. [2024-06-14 14:05:48,710 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 38 changer transitions 0/179 dead transitions. [2024-06-14 14:05:48,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 2182 flow [2024-06-14 14:05:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:05:48,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:05:48,711 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1568 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:05:48,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 2182 flow [2024-06-14 14:05:48,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 2076 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:48,757 INFO L231 Difference]: Finished difference. Result has 132 places, 161 transitions, 1679 flow [2024-06-14 14:05:48,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1679, PETRI_PLACES=132, PETRI_TRANSITIONS=161} [2024-06-14 14:05:48,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-14 14:05:48,758 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 161 transitions, 1679 flow [2024-06-14 14:05:48,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:48,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:48,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:05:48,758 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:48,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432248, now seen corresponding path program 1 times [2024-06-14 14:05:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:48,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879645676] [2024-06-14 14:05:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:48,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:48,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:48,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879645676] [2024-06-14 14:05:48,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879645676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:48,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018266049] [2024-06-14 14:05:48,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:48,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:48,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:49,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:49,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 161 transitions, 1679 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:49,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:49,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:49,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:49,221 INFO L124 PetriNetUnfolderBase]: 1187/1978 cut-off events. [2024-06-14 14:05:49,221 INFO L125 PetriNetUnfolderBase]: For 44464/44464 co-relation queries the response was YES. [2024-06-14 14:05:49,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11641 conditions, 1978 events. 1187/1978 cut-off events. For 44464/44464 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10535 event pairs, 288 based on Foata normal form. 2/1973 useless extension candidates. Maximal degree in co-relation 11575. Up to 1663 conditions per place. [2024-06-14 14:05:49,235 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 52 changer transitions 0/184 dead transitions. [2024-06-14 14:05:49,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 184 transitions, 2306 flow [2024-06-14 14:05:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:05:49,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:05:49,237 INFO L175 Difference]: Start difference. First operand has 132 places, 161 transitions, 1679 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:05:49,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 184 transitions, 2306 flow [2024-06-14 14:05:49,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 184 transitions, 2242 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:49,291 INFO L231 Difference]: Finished difference. Result has 138 places, 169 transitions, 1866 flow [2024-06-14 14:05:49,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1866, PETRI_PLACES=138, PETRI_TRANSITIONS=169} [2024-06-14 14:05:49,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-14 14:05:49,294 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 169 transitions, 1866 flow [2024-06-14 14:05:49,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:49,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:49,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:49,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:05:49,294 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)] === [2024-06-14 14:05:49,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:49,295 INFO L85 PathProgramCache]: Analyzing trace with hash 332279124, now seen corresponding path program 2 times [2024-06-14 14:05:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:49,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725543460] [2024-06-14 14:05:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:49,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:49,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:49,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725543460] [2024-06-14 14:05:49,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725543460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:49,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:49,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652201035] [2024-06-14 14:05:49,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:49,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:49,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:49,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:49,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 169 transitions, 1866 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:49,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:49,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:49,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:49,897 INFO L124 PetriNetUnfolderBase]: 1197/1995 cut-off events. [2024-06-14 14:05:49,898 INFO L125 PetriNetUnfolderBase]: For 47702/47702 co-relation queries the response was YES. [2024-06-14 14:05:49,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11945 conditions, 1995 events. 1197/1995 cut-off events. For 47702/47702 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10600 event pairs, 280 based on Foata normal form. 2/1990 useless extension candidates. Maximal degree in co-relation 11875. Up to 1726 conditions per place. [2024-06-14 14:05:49,916 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 148 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-06-14 14:05:49,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 186 transitions, 2296 flow [2024-06-14 14:05:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 14:05:49,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:05:49,917 INFO L175 Difference]: Start difference. First operand has 138 places, 169 transitions, 1866 flow. Second operand 6 states and 142 transitions. [2024-06-14 14:05:49,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 186 transitions, 2296 flow [2024-06-14 14:05:49,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 186 transitions, 2148 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:49,990 INFO L231 Difference]: Finished difference. Result has 141 places, 173 transitions, 1835 flow [2024-06-14 14:05:49,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1835, PETRI_PLACES=141, PETRI_TRANSITIONS=173} [2024-06-14 14:05:49,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 14:05:49,991 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 173 transitions, 1835 flow [2024-06-14 14:05:49,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:49,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:49,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:49,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:05:49,992 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)] === [2024-06-14 14:05:49,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash -497409828, now seen corresponding path program 2 times [2024-06-14 14:05:49,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:49,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038048137] [2024-06-14 14:05:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:49,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:50,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:50,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038048137] [2024-06-14 14:05:50,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038048137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:50,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:50,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:50,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005129913] [2024-06-14 14:05:50,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:50,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:50,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:50,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:50,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:50,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 173 transitions, 1835 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:50,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:50,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:50,459 INFO L124 PetriNetUnfolderBase]: 1199/1999 cut-off events. [2024-06-14 14:05:50,459 INFO L125 PetriNetUnfolderBase]: For 49883/49883 co-relation queries the response was YES. [2024-06-14 14:05:50,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11955 conditions, 1999 events. 1199/1999 cut-off events. For 49883/49883 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10681 event pairs, 288 based on Foata normal form. 2/1994 useless extension candidates. Maximal degree in co-relation 11885. Up to 1681 conditions per place. [2024-06-14 14:05:50,476 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 128 selfloop transitions, 55 changer transitions 0/190 dead transitions. [2024-06-14 14:05:50,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 190 transitions, 2392 flow [2024-06-14 14:05:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 14:05:50,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-14 14:05:50,477 INFO L175 Difference]: Start difference. First operand has 141 places, 173 transitions, 1835 flow. Second operand 5 states and 127 transitions. [2024-06-14 14:05:50,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 190 transitions, 2392 flow [2024-06-14 14:05:50,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 2301 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:50,551 INFO L231 Difference]: Finished difference. Result has 141 places, 176 transitions, 1911 flow [2024-06-14 14:05:50,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1911, PETRI_PLACES=141, PETRI_TRANSITIONS=176} [2024-06-14 14:05:50,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 14:05:50,552 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 176 transitions, 1911 flow [2024-06-14 14:05:50,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:50,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:50,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:05:50,553 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)] === [2024-06-14 14:05:50,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:50,553 INFO L85 PathProgramCache]: Analyzing trace with hash -535840404, now seen corresponding path program 3 times [2024-06-14 14:05:50,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:50,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937967639] [2024-06-14 14:05:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:50,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:50,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:50,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937967639] [2024-06-14 14:05:50,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937967639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:50,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:50,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517207307] [2024-06-14 14:05:50,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:50,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:50,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:50,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:50,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 176 transitions, 1911 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:50,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:50,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:51,050 INFO L124 PetriNetUnfolderBase]: 1201/2005 cut-off events. [2024-06-14 14:05:51,050 INFO L125 PetriNetUnfolderBase]: For 52307/52307 co-relation queries the response was YES. [2024-06-14 14:05:51,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12114 conditions, 2005 events. 1201/2005 cut-off events. For 52307/52307 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10724 event pairs, 280 based on Foata normal form. 2/2000 useless extension candidates. Maximal degree in co-relation 12044. Up to 1680 conditions per place. [2024-06-14 14:05:51,067 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 145 selfloop transitions, 47 changer transitions 0/199 dead transitions. [2024-06-14 14:05:51,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 2443 flow [2024-06-14 14:05:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 14:05:51,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:05:51,069 INFO L175 Difference]: Start difference. First operand has 141 places, 176 transitions, 1911 flow. Second operand 6 states and 150 transitions. [2024-06-14 14:05:51,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 2443 flow [2024-06-14 14:05:51,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 199 transitions, 2305 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:51,162 INFO L231 Difference]: Finished difference. Result has 145 places, 179 transitions, 1947 flow [2024-06-14 14:05:51,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1947, PETRI_PLACES=145, PETRI_TRANSITIONS=179} [2024-06-14 14:05:51,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 14:05:51,163 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 179 transitions, 1947 flow [2024-06-14 14:05:51,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:51,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:51,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:05:51,164 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:51,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1739189820, now seen corresponding path program 3 times [2024-06-14 14:05:51,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:51,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773510917] [2024-06-14 14:05:51,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:51,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:51,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:51,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773510917] [2024-06-14 14:05:51,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773510917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:51,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:51,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:51,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376733921] [2024-06-14 14:05:51,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:51,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:51,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:51,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:51,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:51,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:51,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 179 transitions, 1947 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:51,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:51,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:51,700 INFO L124 PetriNetUnfolderBase]: 1193/2002 cut-off events. [2024-06-14 14:05:51,700 INFO L125 PetriNetUnfolderBase]: For 50770/50770 co-relation queries the response was YES. [2024-06-14 14:05:51,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12012 conditions, 2002 events. 1193/2002 cut-off events. For 50770/50770 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10745 event pairs, 266 based on Foata normal form. 2/2001 useless extension candidates. Maximal degree in co-relation 11941. Up to 1712 conditions per place. [2024-06-14 14:05:51,716 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 152 selfloop transitions, 38 changer transitions 0/197 dead transitions. [2024-06-14 14:05:51,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 2373 flow [2024-06-14 14:05:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 14:05:51,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-14 14:05:51,718 INFO L175 Difference]: Start difference. First operand has 145 places, 179 transitions, 1947 flow. Second operand 5 states and 131 transitions. [2024-06-14 14:05:51,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 2373 flow [2024-06-14 14:05:51,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 197 transitions, 2262 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:51,797 INFO L231 Difference]: Finished difference. Result has 146 places, 179 transitions, 1936 flow [2024-06-14 14:05:51,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1936, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2024-06-14 14:05:51,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-14 14:05:51,798 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1936 flow [2024-06-14 14:05:51,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:51,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:51,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:05:51,798 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:51,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:51,799 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-14 14:05:51,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:51,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234216140] [2024-06-14 14:05:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:52,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:52,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234216140] [2024-06-14 14:05:52,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234216140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:52,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:52,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:52,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488583339] [2024-06-14 14:05:52,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:52,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:52,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:52,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:05:52,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1936 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:52,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:52,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:05:52,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:52,293 INFO L124 PetriNetUnfolderBase]: 1129/1936 cut-off events. [2024-06-14 14:05:52,294 INFO L125 PetriNetUnfolderBase]: For 49296/49296 co-relation queries the response was YES. [2024-06-14 14:05:52,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11529 conditions, 1936 events. 1129/1936 cut-off events. For 49296/49296 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10557 event pairs, 265 based on Foata normal form. 2/1935 useless extension candidates. Maximal degree in co-relation 11457. Up to 1588 conditions per place. [2024-06-14 14:05:52,310 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 146 selfloop transitions, 10 changer transitions 0/190 dead transitions. [2024-06-14 14:05:52,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 190 transitions, 2294 flow [2024-06-14 14:05:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 14:05:52,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 14:05:52,311 INFO L175 Difference]: Start difference. First operand has 146 places, 179 transitions, 1936 flow. Second operand 4 states and 101 transitions. [2024-06-14 14:05:52,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 190 transitions, 2294 flow [2024-06-14 14:05:52,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 190 transitions, 2218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:52,383 INFO L231 Difference]: Finished difference. Result has 146 places, 181 transitions, 1913 flow [2024-06-14 14:05:52,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1913, PETRI_PLACES=146, PETRI_TRANSITIONS=181} [2024-06-14 14:05:52,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-14 14:05:52,383 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 181 transitions, 1913 flow [2024-06-14 14:05:52,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:52,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:52,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:52,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:05:52,384 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:52,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1346028900, now seen corresponding path program 1 times [2024-06-14 14:05:52,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:52,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502886910] [2024-06-14 14:05:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:52,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:52,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:52,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502886910] [2024-06-14 14:05:52,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502886910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:52,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:52,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:52,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841594432] [2024-06-14 14:05:52,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:52,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:52,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:52,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:52,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 181 transitions, 1913 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:52,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:52,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:52,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:53,011 INFO L124 PetriNetUnfolderBase]: 1315/2228 cut-off events. [2024-06-14 14:05:53,011 INFO L125 PetriNetUnfolderBase]: For 64005/64011 co-relation queries the response was YES. [2024-06-14 14:05:53,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13193 conditions, 2228 events. 1315/2228 cut-off events. For 64005/64011 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12391 event pairs, 217 based on Foata normal form. 12/2233 useless extension candidates. Maximal degree in co-relation 13120. Up to 1496 conditions per place. [2024-06-14 14:05:53,029 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 49 changer transitions 0/239 dead transitions. [2024-06-14 14:05:53,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 239 transitions, 2686 flow [2024-06-14 14:05:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-14 14:05:53,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-14 14:05:53,031 INFO L175 Difference]: Start difference. First operand has 146 places, 181 transitions, 1913 flow. Second operand 10 states and 248 transitions. [2024-06-14 14:05:53,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 239 transitions, 2686 flow [2024-06-14 14:05:53,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 239 transitions, 2649 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:53,123 INFO L231 Difference]: Finished difference. Result has 156 places, 186 transitions, 2054 flow [2024-06-14 14:05:53,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2054, PETRI_PLACES=156, PETRI_TRANSITIONS=186} [2024-06-14 14:05:53,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-14 14:05:53,124 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 186 transitions, 2054 flow [2024-06-14 14:05:53,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:53,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:53,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:53,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:05:53,124 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:53,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1434594660, now seen corresponding path program 2 times [2024-06-14 14:05:53,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:53,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278609220] [2024-06-14 14:05:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:53,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:53,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:53,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278609220] [2024-06-14 14:05:53,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278609220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:53,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:53,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:53,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751638425] [2024-06-14 14:05:53,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:53,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:53,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:53,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:53,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:53,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:53,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 186 transitions, 2054 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:53,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:53,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:53,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:53,785 INFO L124 PetriNetUnfolderBase]: 1442/2451 cut-off events. [2024-06-14 14:05:53,785 INFO L125 PetriNetUnfolderBase]: For 75303/75309 co-relation queries the response was YES. [2024-06-14 14:05:53,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14919 conditions, 2451 events. 1442/2451 cut-off events. For 75303/75309 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14028 event pairs, 331 based on Foata normal form. 12/2456 useless extension candidates. Maximal degree in co-relation 14843. Up to 1830 conditions per place. [2024-06-14 14:05:53,805 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 47 changer transitions 0/235 dead transitions. [2024-06-14 14:05:53,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 235 transitions, 2787 flow [2024-06-14 14:05:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 14:05:53,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-14 14:05:53,806 INFO L175 Difference]: Start difference. First operand has 156 places, 186 transitions, 2054 flow. Second operand 9 states and 226 transitions. [2024-06-14 14:05:53,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 235 transitions, 2787 flow [2024-06-14 14:05:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 235 transitions, 2713 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:53,927 INFO L231 Difference]: Finished difference. Result has 161 places, 189 transitions, 2128 flow [2024-06-14 14:05:53,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2128, PETRI_PLACES=161, PETRI_TRANSITIONS=189} [2024-06-14 14:05:53,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-14 14:05:53,927 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 189 transitions, 2128 flow [2024-06-14 14:05:53,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:53,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:53,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:05:53,928 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:53,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash -214705298, now seen corresponding path program 3 times [2024-06-14 14:05:53,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:53,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214041027] [2024-06-14 14:05:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:53,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:54,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:54,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214041027] [2024-06-14 14:05:54,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214041027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:54,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:54,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:54,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260167217] [2024-06-14 14:05:54,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:54,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:54,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:54,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:54,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 189 transitions, 2128 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:54,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:54,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:54,618 INFO L124 PetriNetUnfolderBase]: 1414/2407 cut-off events. [2024-06-14 14:05:54,627 INFO L125 PetriNetUnfolderBase]: For 75374/75380 co-relation queries the response was YES. [2024-06-14 14:05:54,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14617 conditions, 2407 events. 1414/2407 cut-off events. For 75374/75380 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13731 event pairs, 332 based on Foata normal form. 16/2416 useless extension candidates. Maximal degree in co-relation 14538. Up to 1909 conditions per place. [2024-06-14 14:05:54,646 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 46 changer transitions 0/231 dead transitions. [2024-06-14 14:05:54,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 231 transitions, 2708 flow [2024-06-14 14:05:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 14:05:54,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-14 14:05:54,650 INFO L175 Difference]: Start difference. First operand has 161 places, 189 transitions, 2128 flow. Second operand 9 states and 221 transitions. [2024-06-14 14:05:54,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 231 transitions, 2708 flow [2024-06-14 14:05:54,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 231 transitions, 2630 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:54,762 INFO L231 Difference]: Finished difference. Result has 165 places, 190 transitions, 2171 flow [2024-06-14 14:05:54,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2171, PETRI_PLACES=165, PETRI_TRANSITIONS=190} [2024-06-14 14:05:54,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-14 14:05:54,763 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 190 transitions, 2171 flow [2024-06-14 14:05:54,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:54,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:54,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:05:54,763 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:54,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:54,764 INFO L85 PathProgramCache]: Analyzing trace with hash 201918776, now seen corresponding path program 4 times [2024-06-14 14:05:54,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:54,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714617377] [2024-06-14 14:05:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:54,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:55,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:55,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714617377] [2024-06-14 14:05:55,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714617377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:55,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:55,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:55,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636434480] [2024-06-14 14:05:55,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:55,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:55,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:55,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:55,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:55,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:55,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 190 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:55,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:55,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:55,461 INFO L124 PetriNetUnfolderBase]: 1472/2494 cut-off events. [2024-06-14 14:05:55,461 INFO L125 PetriNetUnfolderBase]: For 79390/79390 co-relation queries the response was YES. [2024-06-14 14:05:55,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15154 conditions, 2494 events. 1472/2494 cut-off events. For 79390/79390 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14364 event pairs, 347 based on Foata normal form. 16/2502 useless extension candidates. Maximal degree in co-relation 15073. Up to 2007 conditions per place. [2024-06-14 14:05:55,482 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 48 changer transitions 0/233 dead transitions. [2024-06-14 14:05:55,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 233 transitions, 2753 flow [2024-06-14 14:05:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 14:05:55,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 14:05:55,484 INFO L175 Difference]: Start difference. First operand has 165 places, 190 transitions, 2171 flow. Second operand 10 states and 238 transitions. [2024-06-14 14:05:55,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 233 transitions, 2753 flow [2024-06-14 14:05:55,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 233 transitions, 2664 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:55,601 INFO L231 Difference]: Finished difference. Result has 168 places, 191 transitions, 2203 flow [2024-06-14 14:05:55,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2203, PETRI_PLACES=168, PETRI_TRANSITIONS=191} [2024-06-14 14:05:55,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-14 14:05:55,602 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 191 transitions, 2203 flow [2024-06-14 14:05:55,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:55,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:55,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:05:55,602 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:55,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash 494426656, now seen corresponding path program 5 times [2024-06-14 14:05:55,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:55,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495958183] [2024-06-14 14:05:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:55,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:55,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:55,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495958183] [2024-06-14 14:05:55,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495958183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:55,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:55,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:55,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380821375] [2024-06-14 14:05:55,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:55,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:55,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:55,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:55,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:55,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 191 transitions, 2203 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:55,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:55,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:56,218 INFO L124 PetriNetUnfolderBase]: 1530/2602 cut-off events. [2024-06-14 14:05:56,218 INFO L125 PetriNetUnfolderBase]: For 84345/84345 co-relation queries the response was YES. [2024-06-14 14:05:56,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15739 conditions, 2602 events. 1530/2602 cut-off events. For 84345/84345 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15185 event pairs, 362 based on Foata normal form. 16/2610 useless extension candidates. Maximal degree in co-relation 15657. Up to 2105 conditions per place. [2024-06-14 14:05:56,240 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 46 changer transitions 0/230 dead transitions. [2024-06-14 14:05:56,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 230 transitions, 2771 flow [2024-06-14 14:05:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 14:05:56,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:05:56,242 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 2203 flow. Second operand 9 states and 219 transitions. [2024-06-14 14:05:56,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 230 transitions, 2771 flow [2024-06-14 14:05:56,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 230 transitions, 2668 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:56,358 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2219 flow [2024-06-14 14:05:56,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2219, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2024-06-14 14:05:56,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 14:05:56,359 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2219 flow [2024-06-14 14:05:56,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:56,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:56,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:05:56,359 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:56,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:56,360 INFO L85 PathProgramCache]: Analyzing trace with hash 488359632, now seen corresponding path program 6 times [2024-06-14 14:05:56,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:56,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246750885] [2024-06-14 14:05:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:56,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:56,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:56,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246750885] [2024-06-14 14:05:56,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246750885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:56,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:56,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:56,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414750844] [2024-06-14 14:05:56,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:56,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:56,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:56,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:56,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2219 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:56,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:56,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:56,985 INFO L124 PetriNetUnfolderBase]: 1546/2634 cut-off events. [2024-06-14 14:05:56,985 INFO L125 PetriNetUnfolderBase]: For 84985/84985 co-relation queries the response was YES. [2024-06-14 14:05:56,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15805 conditions, 2634 events. 1546/2634 cut-off events. For 84985/84985 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15460 event pairs, 353 based on Foata normal form. 12/2638 useless extension candidates. Maximal degree in co-relation 15722. Up to 1958 conditions per place. [2024-06-14 14:05:57,007 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 49 changer transitions 0/236 dead transitions. [2024-06-14 14:05:57,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 236 transitions, 2837 flow [2024-06-14 14:05:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 14:05:57,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-14 14:05:57,008 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2219 flow. Second operand 9 states and 221 transitions. [2024-06-14 14:05:57,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 236 transitions, 2837 flow [2024-06-14 14:05:57,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 236 transitions, 2736 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:57,133 INFO L231 Difference]: Finished difference. Result has 172 places, 195 transitions, 2279 flow [2024-06-14 14:05:57,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2279, PETRI_PLACES=172, PETRI_TRANSITIONS=195} [2024-06-14 14:05:57,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-14 14:05:57,134 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 195 transitions, 2279 flow [2024-06-14 14:05:57,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:57,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:57,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:05:57,135 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:57,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash 695433804, now seen corresponding path program 1 times [2024-06-14 14:05:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:57,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849191958] [2024-06-14 14:05:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:57,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:57,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849191958] [2024-06-14 14:05:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849191958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:57,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:57,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:57,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441039650] [2024-06-14 14:05:57,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:57,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:57,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:57,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:57,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:57,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 195 transitions, 2279 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:57,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:57,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:57,819 INFO L124 PetriNetUnfolderBase]: 1587/2715 cut-off events. [2024-06-14 14:05:57,819 INFO L125 PetriNetUnfolderBase]: For 89955/89955 co-relation queries the response was YES. [2024-06-14 14:05:57,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16256 conditions, 2715 events. 1587/2715 cut-off events. For 89955/89955 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16173 event pairs, 329 based on Foata normal form. 12/2719 useless extension candidates. Maximal degree in co-relation 16171. Up to 1919 conditions per place. [2024-06-14 14:05:57,841 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-14 14:05:57,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 241 transitions, 2893 flow [2024-06-14 14:05:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-14 14:05:57,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738095238095238 [2024-06-14 14:05:57,842 INFO L175 Difference]: Start difference. First operand has 172 places, 195 transitions, 2279 flow. Second operand 10 states and 241 transitions. [2024-06-14 14:05:57,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 241 transitions, 2893 flow [2024-06-14 14:05:57,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 241 transitions, 2815 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:57,988 INFO L231 Difference]: Finished difference. Result has 177 places, 196 transitions, 2339 flow [2024-06-14 14:05:57,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2339, PETRI_PLACES=177, PETRI_TRANSITIONS=196} [2024-06-14 14:05:57,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-14 14:05:57,989 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 196 transitions, 2339 flow [2024-06-14 14:05:57,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:57,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:57,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:05:57,989 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:57,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:57,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1006932276, now seen corresponding path program 7 times [2024-06-14 14:05:57,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:57,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10892082] [2024-06-14 14:05:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:57,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:58,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:58,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10892082] [2024-06-14 14:05:58,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10892082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:58,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:58,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:58,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129893001] [2024-06-14 14:05:58,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:58,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:58,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:58,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:58,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:58,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:58,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 196 transitions, 2339 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:58,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:58,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:58,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:58,735 INFO L124 PetriNetUnfolderBase]: 1628/2797 cut-off events. [2024-06-14 14:05:58,735 INFO L125 PetriNetUnfolderBase]: For 94658/94664 co-relation queries the response was YES. [2024-06-14 14:05:58,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16850 conditions, 2797 events. 1628/2797 cut-off events. For 94658/94664 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16741 event pairs, 297 based on Foata normal form. 12/2802 useless extension candidates. Maximal degree in co-relation 16763. Up to 2106 conditions per place. [2024-06-14 14:05:58,756 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 48 changer transitions 0/240 dead transitions. [2024-06-14 14:05:58,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 240 transitions, 3081 flow [2024-06-14 14:05:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 14:05:58,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-14 14:05:58,759 INFO L175 Difference]: Start difference. First operand has 177 places, 196 transitions, 2339 flow. Second operand 8 states and 205 transitions. [2024-06-14 14:05:58,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 240 transitions, 3081 flow [2024-06-14 14:05:58,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 240 transitions, 2957 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:58,920 INFO L231 Difference]: Finished difference. Result has 178 places, 198 transitions, 2353 flow [2024-06-14 14:05:58,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2353, PETRI_PLACES=178, PETRI_TRANSITIONS=198} [2024-06-14 14:05:58,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-14 14:05:58,921 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 198 transitions, 2353 flow [2024-06-14 14:05:58,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:58,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:58,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:05:58,922 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:58,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash -77741648, now seen corresponding path program 8 times [2024-06-14 14:05:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:58,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798367048] [2024-06-14 14:05:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:59,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:59,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798367048] [2024-06-14 14:05:59,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798367048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:59,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:59,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:59,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801133733] [2024-06-14 14:05:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:59,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:59,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 198 transitions, 2353 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:59,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:59,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:59,565 INFO L124 PetriNetUnfolderBase]: 1686/2895 cut-off events. [2024-06-14 14:05:59,565 INFO L125 PetriNetUnfolderBase]: For 101908/101914 co-relation queries the response was YES. [2024-06-14 14:05:59,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17333 conditions, 2895 events. 1686/2895 cut-off events. For 101908/101914 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17453 event pairs, 402 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17244. Up to 2377 conditions per place. [2024-06-14 14:05:59,590 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 46 changer transitions 0/236 dead transitions. [2024-06-14 14:05:59,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 236 transitions, 2935 flow [2024-06-14 14:05:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 14:05:59,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:05:59,592 INFO L175 Difference]: Start difference. First operand has 178 places, 198 transitions, 2353 flow. Second operand 8 states and 200 transitions. [2024-06-14 14:05:59,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 236 transitions, 2935 flow [2024-06-14 14:05:59,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 236 transitions, 2785 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:59,754 INFO L231 Difference]: Finished difference. Result has 179 places, 199 transitions, 2326 flow [2024-06-14 14:05:59,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2326, PETRI_PLACES=179, PETRI_TRANSITIONS=199} [2024-06-14 14:05:59,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-14 14:05:59,754 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 199 transitions, 2326 flow [2024-06-14 14:05:59,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:59,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:59,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:05:59,755 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:59,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:59,755 INFO L85 PathProgramCache]: Analyzing trace with hash -398182934, now seen corresponding path program 9 times [2024-06-14 14:05:59,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:59,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843285836] [2024-06-14 14:05:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:59,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:59,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:59,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843285836] [2024-06-14 14:05:59,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843285836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:59,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:59,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:59,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436164397] [2024-06-14 14:05:59,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:59,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:59,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:59,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:00,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:00,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 199 transitions, 2326 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:00,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:00,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:00,430 INFO L124 PetriNetUnfolderBase]: 1744/2993 cut-off events. [2024-06-14 14:06:00,430 INFO L125 PetriNetUnfolderBase]: For 106541/106547 co-relation queries the response was YES. [2024-06-14 14:06:00,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17587 conditions, 2993 events. 1744/2993 cut-off events. For 106541/106547 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18201 event pairs, 412 based on Foata normal form. 16/3002 useless extension candidates. Maximal degree in co-relation 17498. Up to 2475 conditions per place. [2024-06-14 14:06:00,455 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 47 changer transitions 0/245 dead transitions. [2024-06-14 14:06:00,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 245 transitions, 2944 flow [2024-06-14 14:06:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 14:06:00,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-06-14 14:06:00,457 INFO L175 Difference]: Start difference. First operand has 179 places, 199 transitions, 2326 flow. Second operand 10 states and 242 transitions. [2024-06-14 14:06:00,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 245 transitions, 2944 flow [2024-06-14 14:06:00,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 245 transitions, 2847 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:00,677 INFO L231 Difference]: Finished difference. Result has 183 places, 200 transitions, 2352 flow [2024-06-14 14:06:00,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2352, PETRI_PLACES=183, PETRI_TRANSITIONS=200} [2024-06-14 14:06:00,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-14 14:06:00,678 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 200 transitions, 2352 flow [2024-06-14 14:06:00,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:00,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:00,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:06:00,678 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:00,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1285671304, now seen corresponding path program 10 times [2024-06-14 14:06:00,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:00,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452260384] [2024-06-14 14:06:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:00,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:00,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:00,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452260384] [2024-06-14 14:06:00,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452260384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:00,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:00,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:00,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522075306] [2024-06-14 14:06:00,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:00,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:00,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:00,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:00,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:00,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:00,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 200 transitions, 2352 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:00,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:00,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:01,392 INFO L124 PetriNetUnfolderBase]: 1716/2945 cut-off events. [2024-06-14 14:06:01,392 INFO L125 PetriNetUnfolderBase]: For 101082/101088 co-relation queries the response was YES. [2024-06-14 14:06:01,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16917 conditions, 2945 events. 1716/2945 cut-off events. For 101082/101088 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17918 event pairs, 399 based on Foata normal form. 20/2957 useless extension candidates. Maximal degree in co-relation 16827. Up to 2431 conditions per place. [2024-06-14 14:06:01,416 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 46 changer transitions 0/239 dead transitions. [2024-06-14 14:06:01,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 239 transitions, 2942 flow [2024-06-14 14:06:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 14:06:01,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-14 14:06:01,417 INFO L175 Difference]: Start difference. First operand has 183 places, 200 transitions, 2352 flow. Second operand 9 states and 214 transitions. [2024-06-14 14:06:01,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 239 transitions, 2942 flow [2024-06-14 14:06:01,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 239 transitions, 2825 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:01,580 INFO L231 Difference]: Finished difference. Result has 184 places, 201 transitions, 2358 flow [2024-06-14 14:06:01,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2358, PETRI_PLACES=184, PETRI_TRANSITIONS=201} [2024-06-14 14:06:01,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 14:06:01,581 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 201 transitions, 2358 flow [2024-06-14 14:06:01,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:01,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:01,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:06:01,581 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:01,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash -390558422, now seen corresponding path program 2 times [2024-06-14 14:06:01,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:01,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607875047] [2024-06-14 14:06:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:01,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:01,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:01,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607875047] [2024-06-14 14:06:01,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607875047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:01,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:01,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:01,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196485324] [2024-06-14 14:06:01,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:01,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:01,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:01,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:01,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:01,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 201 transitions, 2358 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:01,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:01,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:02,273 INFO L124 PetriNetUnfolderBase]: 1757/3030 cut-off events. [2024-06-14 14:06:02,274 INFO L125 PetriNetUnfolderBase]: For 101806/101812 co-relation queries the response was YES. [2024-06-14 14:06:02,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17191 conditions, 3030 events. 1757/3030 cut-off events. For 101806/101812 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18602 event pairs, 396 based on Foata normal form. 12/3035 useless extension candidates. Maximal degree in co-relation 17100. Up to 2323 conditions per place. [2024-06-14 14:06:02,301 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 51 changer transitions 0/250 dead transitions. [2024-06-14 14:06:02,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 250 transitions, 3000 flow [2024-06-14 14:06:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 14:06:02,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-14 14:06:02,303 INFO L175 Difference]: Start difference. First operand has 184 places, 201 transitions, 2358 flow. Second operand 10 states and 244 transitions. [2024-06-14 14:06:02,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 250 transitions, 3000 flow [2024-06-14 14:06:02,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 250 transitions, 2915 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:02,512 INFO L231 Difference]: Finished difference. Result has 188 places, 202 transitions, 2407 flow [2024-06-14 14:06:02,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2407, PETRI_PLACES=188, PETRI_TRANSITIONS=202} [2024-06-14 14:06:02,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-14 14:06:02,513 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 202 transitions, 2407 flow [2024-06-14 14:06:02,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:02,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:02,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:02,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:06:02,514 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:02,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1293295816, now seen corresponding path program 3 times [2024-06-14 14:06:02,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:02,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923393941] [2024-06-14 14:06:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:02,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923393941] [2024-06-14 14:06:02,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923393941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:02,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:02,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:02,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726604059] [2024-06-14 14:06:02,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:02,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:02,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:02,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 202 transitions, 2407 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:02,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:02,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:02,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:03,299 INFO L124 PetriNetUnfolderBase]: 1798/3102 cut-off events. [2024-06-14 14:06:03,300 INFO L125 PetriNetUnfolderBase]: For 108494/108500 co-relation queries the response was YES. [2024-06-14 14:06:03,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17663 conditions, 3102 events. 1798/3102 cut-off events. For 108494/108500 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19233 event pairs, 414 based on Foata normal form. 16/3110 useless extension candidates. Maximal degree in co-relation 17570. Up to 2486 conditions per place. [2024-06-14 14:06:03,328 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 192 selfloop transitions, 49 changer transitions 0/248 dead transitions. [2024-06-14 14:06:03,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 248 transitions, 3039 flow [2024-06-14 14:06:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-14 14:06:03,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-14 14:06:03,329 INFO L175 Difference]: Start difference. First operand has 188 places, 202 transitions, 2407 flow. Second operand 10 states and 237 transitions. [2024-06-14 14:06:03,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 248 transitions, 3039 flow [2024-06-14 14:06:03,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 248 transitions, 2919 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:03,533 INFO L231 Difference]: Finished difference. Result has 190 places, 203 transitions, 2419 flow [2024-06-14 14:06:03,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2419, PETRI_PLACES=190, PETRI_TRANSITIONS=203} [2024-06-14 14:06:03,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 14:06:03,533 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 203 transitions, 2419 flow [2024-06-14 14:06:03,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:03,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:03,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:06:03,534 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:03,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:03,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1855156424, now seen corresponding path program 4 times [2024-06-14 14:06:03,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:03,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761942313] [2024-06-14 14:06:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:03,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:03,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:03,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761942313] [2024-06-14 14:06:03,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761942313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:03,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:03,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:03,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964693347] [2024-06-14 14:06:03,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:03,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:03,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:03,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:03,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:03,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:03,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 203 transitions, 2419 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:03,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:03,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:04,214 INFO L124 PetriNetUnfolderBase]: 1778/3080 cut-off events. [2024-06-14 14:06:04,214 INFO L125 PetriNetUnfolderBase]: For 102677/102683 co-relation queries the response was YES. [2024-06-14 14:06:04,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 3080 events. 1778/3080 cut-off events. For 102677/102683 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19106 event pairs, 359 based on Foata normal form. 16/3088 useless extension candidates. Maximal degree in co-relation 16955. Up to 1710 conditions per place. [2024-06-14 14:06:04,241 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 177 selfloop transitions, 60 changer transitions 0/244 dead transitions. [2024-06-14 14:06:04,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 244 transitions, 2935 flow [2024-06-14 14:06:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 14:06:04,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:06:04,243 INFO L175 Difference]: Start difference. First operand has 190 places, 203 transitions, 2419 flow. Second operand 9 states and 216 transitions. [2024-06-14 14:06:04,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 244 transitions, 2935 flow [2024-06-14 14:06:04,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 244 transitions, 2799 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:04,457 INFO L231 Difference]: Finished difference. Result has 189 places, 202 transitions, 2333 flow [2024-06-14 14:06:04,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2333, PETRI_PLACES=189, PETRI_TRANSITIONS=202} [2024-06-14 14:06:04,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-14 14:06:04,457 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 202 transitions, 2333 flow [2024-06-14 14:06:04,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:04,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:04,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:06:04,458 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:04,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:04,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1247397911, now seen corresponding path program 1 times [2024-06-14 14:06:04,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:04,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31917510] [2024-06-14 14:06:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:04,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:04,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31917510] [2024-06-14 14:06:04,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31917510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:04,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:04,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:04,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67260819] [2024-06-14 14:06:04,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:04,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:04,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:04,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:04,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:04,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 202 transitions, 2333 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:04,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:04,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:05,094 INFO L124 PetriNetUnfolderBase]: 1796/3079 cut-off events. [2024-06-14 14:06:05,094 INFO L125 PetriNetUnfolderBase]: For 94817/94817 co-relation queries the response was YES. [2024-06-14 14:06:05,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17186 conditions, 3079 events. 1796/3079 cut-off events. For 94817/94817 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19021 event pairs, 430 based on Foata normal form. 2/3073 useless extension candidates. Maximal degree in co-relation 17092. Up to 2581 conditions per place. [2024-06-14 14:06:05,123 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 147 selfloop transitions, 79 changer transitions 0/233 dead transitions. [2024-06-14 14:06:05,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 233 transitions, 3215 flow [2024-06-14 14:06:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:06:05,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 14:06:05,124 INFO L175 Difference]: Start difference. First operand has 189 places, 202 transitions, 2333 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:06:05,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 233 transitions, 3215 flow [2024-06-14 14:06:05,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 233 transitions, 3006 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:05,322 INFO L231 Difference]: Finished difference. Result has 187 places, 213 transitions, 2421 flow [2024-06-14 14:06:05,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2421, PETRI_PLACES=187, PETRI_TRANSITIONS=213} [2024-06-14 14:06:05,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-14 14:06:05,322 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 213 transitions, 2421 flow [2024-06-14 14:06:05,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:05,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:05,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:05,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:06:05,323 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:05,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash 418301511, now seen corresponding path program 2 times [2024-06-14 14:06:05,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:05,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992524070] [2024-06-14 14:06:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:05,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:05,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:05,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992524070] [2024-06-14 14:06:05,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992524070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:05,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:05,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:05,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132541816] [2024-06-14 14:06:05,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:05,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:05,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:05,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:05,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:05,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:05,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 213 transitions, 2421 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:05,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:05,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:05,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:06,012 INFO L124 PetriNetUnfolderBase]: 1822/3126 cut-off events. [2024-06-14 14:06:06,012 INFO L125 PetriNetUnfolderBase]: For 100153/100153 co-relation queries the response was YES. [2024-06-14 14:06:06,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17284 conditions, 3126 events. 1822/3126 cut-off events. For 100153/100153 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19329 event pairs, 419 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 17191. Up to 2724 conditions per place. [2024-06-14 14:06:06,038 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 66 changer transitions 0/238 dead transitions. [2024-06-14 14:06:06,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 238 transitions, 3295 flow [2024-06-14 14:06:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:06:06,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-14 14:06:06,039 INFO L175 Difference]: Start difference. First operand has 187 places, 213 transitions, 2421 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:06:06,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 238 transitions, 3295 flow [2024-06-14 14:06:06,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 238 transitions, 3158 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:06,253 INFO L231 Difference]: Finished difference. Result has 191 places, 221 transitions, 2539 flow [2024-06-14 14:06:06,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2539, PETRI_PLACES=191, PETRI_TRANSITIONS=221} [2024-06-14 14:06:06,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-14 14:06:06,254 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 221 transitions, 2539 flow [2024-06-14 14:06:06,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:06,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:06,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:06,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:06:06,255 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:06,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:06,255 INFO L85 PathProgramCache]: Analyzing trace with hash 418307091, now seen corresponding path program 3 times [2024-06-14 14:06:06,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:06,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410910372] [2024-06-14 14:06:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:06,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:06,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:06,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410910372] [2024-06-14 14:06:06,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410910372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:06,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:06,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:06,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391073264] [2024-06-14 14:06:06,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:06,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:06,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:06,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:06,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 221 transitions, 2539 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:06,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:06,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:06,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:06,926 INFO L124 PetriNetUnfolderBase]: 1816/3118 cut-off events. [2024-06-14 14:06:06,926 INFO L125 PetriNetUnfolderBase]: For 102514/102514 co-relation queries the response was YES. [2024-06-14 14:06:06,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17243 conditions, 3118 events. 1816/3118 cut-off events. For 102514/102514 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19310 event pairs, 419 based on Foata normal form. 2/3113 useless extension candidates. Maximal degree in co-relation 17148. Up to 2718 conditions per place. [2024-06-14 14:06:06,955 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 67 changer transitions 0/239 dead transitions. [2024-06-14 14:06:06,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 239 transitions, 3225 flow [2024-06-14 14:06:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:06:06,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-14 14:06:06,957 INFO L175 Difference]: Start difference. First operand has 191 places, 221 transitions, 2539 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:06:06,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 239 transitions, 3225 flow [2024-06-14 14:06:07,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 239 transitions, 3101 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:07,124 INFO L231 Difference]: Finished difference. Result has 197 places, 221 transitions, 2556 flow [2024-06-14 14:06:07,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2556, PETRI_PLACES=197, PETRI_TRANSITIONS=221} [2024-06-14 14:06:07,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-14 14:06:07,125 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 221 transitions, 2556 flow [2024-06-14 14:06:07,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:07,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:07,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:07,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:06:07,125 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:07,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 568817961, now seen corresponding path program 4 times [2024-06-14 14:06:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:07,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981091476] [2024-06-14 14:06:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:07,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:07,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:07,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981091476] [2024-06-14 14:06:07,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981091476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:07,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:07,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:07,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933386271] [2024-06-14 14:06:07,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:07,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:07,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:07,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:07,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 221 transitions, 2556 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:07,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:07,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:07,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:07,796 INFO L124 PetriNetUnfolderBase]: 1834/3149 cut-off events. [2024-06-14 14:06:07,796 INFO L125 PetriNetUnfolderBase]: For 107719/107719 co-relation queries the response was YES. [2024-06-14 14:06:07,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17665 conditions, 3149 events. 1834/3149 cut-off events. For 107719/107719 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19543 event pairs, 419 based on Foata normal form. 2/3144 useless extension candidates. Maximal degree in co-relation 17568. Up to 2647 conditions per place. [2024-06-14 14:06:07,823 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 92 changer transitions 0/252 dead transitions. [2024-06-14 14:06:07,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 252 transitions, 3564 flow [2024-06-14 14:06:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:06:07,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:06:07,825 INFO L175 Difference]: Start difference. First operand has 197 places, 221 transitions, 2556 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:06:07,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 252 transitions, 3564 flow [2024-06-14 14:06:08,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 252 transitions, 3419 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:08,116 INFO L231 Difference]: Finished difference. Result has 197 places, 228 transitions, 2730 flow [2024-06-14 14:06:08,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2730, PETRI_PLACES=197, PETRI_TRANSITIONS=228} [2024-06-14 14:06:08,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-14 14:06:08,117 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 228 transitions, 2730 flow [2024-06-14 14:06:08,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:08,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:08,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:06:08,118 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:08,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1760165631, now seen corresponding path program 5 times [2024-06-14 14:06:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:08,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794950007] [2024-06-14 14:06:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:08,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:08,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794950007] [2024-06-14 14:06:08,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794950007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:08,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:08,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:08,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688902823] [2024-06-14 14:06:08,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:08,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:08,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:08,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:08,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 228 transitions, 2730 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:08,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:08,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:08,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:08,788 INFO L124 PetriNetUnfolderBase]: 1844/3167 cut-off events. [2024-06-14 14:06:08,788 INFO L125 PetriNetUnfolderBase]: For 112555/112555 co-relation queries the response was YES. [2024-06-14 14:06:08,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18018 conditions, 3167 events. 1844/3167 cut-off events. For 112555/112555 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19677 event pairs, 419 based on Foata normal form. 2/3162 useless extension candidates. Maximal degree in co-relation 17919. Up to 2657 conditions per place. [2024-06-14 14:06:08,818 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 98 changer transitions 0/258 dead transitions. [2024-06-14 14:06:08,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 258 transitions, 3733 flow [2024-06-14 14:06:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 14:06:08,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:06:08,819 INFO L175 Difference]: Start difference. First operand has 197 places, 228 transitions, 2730 flow. Second operand 9 states and 213 transitions. [2024-06-14 14:06:08,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 258 transitions, 3733 flow [2024-06-14 14:06:09,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 258 transitions, 3520 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:09,150 INFO L231 Difference]: Finished difference. Result has 201 places, 232 transitions, 2796 flow [2024-06-14 14:06:09,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2796, PETRI_PLACES=201, PETRI_TRANSITIONS=232} [2024-06-14 14:06:09,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-14 14:06:09,151 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 232 transitions, 2796 flow [2024-06-14 14:06:09,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:09,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:09,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:09,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:06:09,152 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:09,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash 576175191, now seen corresponding path program 6 times [2024-06-14 14:06:09,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:09,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145254548] [2024-06-14 14:06:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:09,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:09,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:09,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145254548] [2024-06-14 14:06:09,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145254548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:09,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:09,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:09,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161744200] [2024-06-14 14:06:09,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:09,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:09,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:09,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 232 transitions, 2796 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:09,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:09,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:09,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:09,831 INFO L124 PetriNetUnfolderBase]: 1877/3233 cut-off events. [2024-06-14 14:06:09,831 INFO L125 PetriNetUnfolderBase]: For 113200/113200 co-relation queries the response was YES. [2024-06-14 14:06:09,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 3233 events. 1877/3233 cut-off events. For 113200/113200 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20174 event pairs, 398 based on Foata normal form. 2/3232 useless extension candidates. Maximal degree in co-relation 18402. Up to 2813 conditions per place. [2024-06-14 14:06:09,861 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 53 changer transitions 0/273 dead transitions. [2024-06-14 14:06:09,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 273 transitions, 3781 flow [2024-06-14 14:06:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 14:06:09,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:06:09,862 INFO L175 Difference]: Start difference. First operand has 201 places, 232 transitions, 2796 flow. Second operand 6 states and 156 transitions. [2024-06-14 14:06:09,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 273 transitions, 3781 flow [2024-06-14 14:06:10,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 273 transitions, 3514 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:10,178 INFO L231 Difference]: Finished difference. Result has 201 places, 249 transitions, 3016 flow [2024-06-14 14:06:10,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3016, PETRI_PLACES=201, PETRI_TRANSITIONS=249} [2024-06-14 14:06:10,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-14 14:06:10,179 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 249 transitions, 3016 flow [2024-06-14 14:06:10,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:10,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:10,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:10,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:06:10,180 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:10,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1474843863, now seen corresponding path program 1 times [2024-06-14 14:06:10,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:10,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125072973] [2024-06-14 14:06:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:10,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:10,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:10,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125072973] [2024-06-14 14:06:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125072973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:10,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:10,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741854687] [2024-06-14 14:06:10,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:10,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:10,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:10,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:10,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 249 transitions, 3016 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:10,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:10,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:10,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:10,935 INFO L124 PetriNetUnfolderBase]: 1905/3285 cut-off events. [2024-06-14 14:06:10,936 INFO L125 PetriNetUnfolderBase]: For 115917/115923 co-relation queries the response was YES. [2024-06-14 14:06:10,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18765 conditions, 3285 events. 1905/3285 cut-off events. For 115917/115923 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20670 event pairs, 415 based on Foata normal form. 6/3286 useless extension candidates. Maximal degree in co-relation 18664. Up to 2729 conditions per place. [2024-06-14 14:06:10,969 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 202 selfloop transitions, 86 changer transitions 0/295 dead transitions. [2024-06-14 14:06:10,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 295 transitions, 4187 flow [2024-06-14 14:06:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 14:06:10,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:06:10,971 INFO L175 Difference]: Start difference. First operand has 201 places, 249 transitions, 3016 flow. Second operand 8 states and 200 transitions. [2024-06-14 14:06:10,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 295 transitions, 4187 flow [2024-06-14 14:06:11,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 295 transitions, 4081 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:11,332 INFO L231 Difference]: Finished difference. Result has 207 places, 264 transitions, 3247 flow [2024-06-14 14:06:11,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3247, PETRI_PLACES=207, PETRI_TRANSITIONS=264} [2024-06-14 14:06:11,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-14 14:06:11,333 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 264 transitions, 3247 flow [2024-06-14 14:06:11,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:11,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:11,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:06:11,334 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:11,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:11,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1149716793, now seen corresponding path program 2 times [2024-06-14 14:06:11,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:11,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077581459] [2024-06-14 14:06:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:11,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:11,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077581459] [2024-06-14 14:06:11,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077581459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:11,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:11,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:11,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783006935] [2024-06-14 14:06:11,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:11,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:11,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:11,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:11,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:11,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 264 transitions, 3247 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:11,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:11,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:12,109 INFO L124 PetriNetUnfolderBase]: 1941/3347 cut-off events. [2024-06-14 14:06:12,109 INFO L125 PetriNetUnfolderBase]: For 123916/123922 co-relation queries the response was YES. [2024-06-14 14:06:12,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19646 conditions, 3347 events. 1941/3347 cut-off events. For 123916/123922 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21128 event pairs, 415 based on Foata normal form. 6/3348 useless extension candidates. Maximal degree in co-relation 19543. Up to 2760 conditions per place. [2024-06-14 14:06:12,141 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 204 selfloop transitions, 100 changer transitions 0/311 dead transitions. [2024-06-14 14:06:12,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 311 transitions, 4558 flow [2024-06-14 14:06:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-14 14:06:12,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 14:06:12,143 INFO L175 Difference]: Start difference. First operand has 207 places, 264 transitions, 3247 flow. Second operand 11 states and 258 transitions. [2024-06-14 14:06:12,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 311 transitions, 4558 flow [2024-06-14 14:06:12,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 311 transitions, 4409 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:12,477 INFO L231 Difference]: Finished difference. Result has 217 places, 276 transitions, 3456 flow [2024-06-14 14:06:12,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3456, PETRI_PLACES=217, PETRI_TRANSITIONS=276} [2024-06-14 14:06:12,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-14 14:06:12,478 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 276 transitions, 3456 flow [2024-06-14 14:06:12,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:12,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:12,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:06:12,478 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:12,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:12,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1150102743, now seen corresponding path program 3 times [2024-06-14 14:06:12,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:12,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282998981] [2024-06-14 14:06:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:12,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:12,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:12,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282998981] [2024-06-14 14:06:12,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282998981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:12,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:12,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125007896] [2024-06-14 14:06:12,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:12,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:12,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:12,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:12,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 276 transitions, 3456 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:12,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:12,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:13,283 INFO L124 PetriNetUnfolderBase]: 1935/3339 cut-off events. [2024-06-14 14:06:13,283 INFO L125 PetriNetUnfolderBase]: For 126102/126108 co-relation queries the response was YES. [2024-06-14 14:06:13,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19829 conditions, 3339 events. 1935/3339 cut-off events. For 126102/126108 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21081 event pairs, 415 based on Foata normal form. 6/3340 useless extension candidates. Maximal degree in co-relation 19723. Up to 2755 conditions per place. [2024-06-14 14:06:13,318 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 204 selfloop transitions, 98 changer transitions 0/309 dead transitions. [2024-06-14 14:06:13,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 309 transitions, 4532 flow [2024-06-14 14:06:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-14 14:06:13,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738095238095238 [2024-06-14 14:06:13,319 INFO L175 Difference]: Start difference. First operand has 217 places, 276 transitions, 3456 flow. Second operand 10 states and 241 transitions. [2024-06-14 14:06:13,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 309 transitions, 4532 flow [2024-06-14 14:06:13,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 309 transitions, 4318 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:13,653 INFO L231 Difference]: Finished difference. Result has 221 places, 276 transitions, 3445 flow [2024-06-14 14:06:13,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3242, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3445, PETRI_PLACES=221, PETRI_TRANSITIONS=276} [2024-06-14 14:06:13,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 14:06:13,653 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 276 transitions, 3445 flow [2024-06-14 14:06:13,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:13,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:13,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:06:13,654 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:13,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:13,654 INFO L85 PathProgramCache]: Analyzing trace with hash 105029785, now seen corresponding path program 1 times [2024-06-14 14:06:13,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:13,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419843250] [2024-06-14 14:06:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:13,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:13,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:13,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419843250] [2024-06-14 14:06:13,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419843250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:13,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:13,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:13,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527367868] [2024-06-14 14:06:13,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:13,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:13,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:13,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:13,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 276 transitions, 3445 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:13,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:13,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:14,374 INFO L124 PetriNetUnfolderBase]: 1940/3345 cut-off events. [2024-06-14 14:06:14,374 INFO L125 PetriNetUnfolderBase]: For 129488/129494 co-relation queries the response was YES. [2024-06-14 14:06:14,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19975 conditions, 3345 events. 1940/3345 cut-off events. For 129488/129494 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21121 event pairs, 416 based on Foata normal form. 5/3345 useless extension candidates. Maximal degree in co-relation 19868. Up to 2902 conditions per place. [2024-06-14 14:06:14,407 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 230 selfloop transitions, 61 changer transitions 0/298 dead transitions. [2024-06-14 14:06:14,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 298 transitions, 4333 flow [2024-06-14 14:06:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:06:14,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-14 14:06:14,408 INFO L175 Difference]: Start difference. First operand has 221 places, 276 transitions, 3445 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:06:14,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 298 transitions, 4333 flow [2024-06-14 14:06:14,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 298 transitions, 4099 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:14,862 INFO L231 Difference]: Finished difference. Result has 218 places, 279 transitions, 3399 flow [2024-06-14 14:06:14,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3399, PETRI_PLACES=218, PETRI_TRANSITIONS=279} [2024-06-14 14:06:14,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 14:06:14,863 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 279 transitions, 3399 flow [2024-06-14 14:06:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:14,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:14,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:14,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 14:06:14,863 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:14,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:14,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1149702905, now seen corresponding path program 1 times [2024-06-14 14:06:14,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:14,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984123136] [2024-06-14 14:06:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:14,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:15,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:15,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984123136] [2024-06-14 14:06:15,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984123136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:15,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:15,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:15,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484449941] [2024-06-14 14:06:15,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:15,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:15,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:15,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:15,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 279 transitions, 3399 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:15,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:15,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:15,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:15,569 INFO L124 PetriNetUnfolderBase]: 1956/3369 cut-off events. [2024-06-14 14:06:15,569 INFO L125 PetriNetUnfolderBase]: For 137889/137895 co-relation queries the response was YES. [2024-06-14 14:06:15,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20055 conditions, 3369 events. 1956/3369 cut-off events. For 137889/137895 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21245 event pairs, 417 based on Foata normal form. 8/3372 useless extension candidates. Maximal degree in co-relation 19948. Up to 2914 conditions per place. [2024-06-14 14:06:15,603 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 64 changer transitions 0/302 dead transitions. [2024-06-14 14:06:15,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 302 transitions, 4293 flow [2024-06-14 14:06:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:06:15,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-14 14:06:15,605 INFO L175 Difference]: Start difference. First operand has 218 places, 279 transitions, 3399 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:06:15,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 302 transitions, 4293 flow [2024-06-14 14:06:15,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 302 transitions, 4181 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:15,991 INFO L231 Difference]: Finished difference. Result has 221 places, 282 transitions, 3479 flow [2024-06-14 14:06:15,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3479, PETRI_PLACES=221, PETRI_TRANSITIONS=282} [2024-06-14 14:06:15,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 14:06:15,992 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 282 transitions, 3479 flow [2024-06-14 14:06:15,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:15,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:15,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:15,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 14:06:15,993 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:15,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:15,993 INFO L85 PathProgramCache]: Analyzing trace with hash 674882755, now seen corresponding path program 4 times [2024-06-14 14:06:15,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:15,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711417017] [2024-06-14 14:06:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:15,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:16,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711417017] [2024-06-14 14:06:16,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711417017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:16,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:16,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:16,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082770003] [2024-06-14 14:06:16,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:16,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:16,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:16,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:16,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 282 transitions, 3479 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:16,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:16,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:16,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:16,855 INFO L124 PetriNetUnfolderBase]: 1974/3398 cut-off events. [2024-06-14 14:06:16,855 INFO L125 PetriNetUnfolderBase]: For 141245/141245 co-relation queries the response was YES. [2024-06-14 14:06:16,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20450 conditions, 3398 events. 1974/3398 cut-off events. For 141245/141245 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21407 event pairs, 396 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 20341. Up to 2900 conditions per place. [2024-06-14 14:06:16,895 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 238 selfloop transitions, 70 changer transitions 0/315 dead transitions. [2024-06-14 14:06:16,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 315 transitions, 4331 flow [2024-06-14 14:06:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 14:06:16,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-14 14:06:16,897 INFO L175 Difference]: Start difference. First operand has 221 places, 282 transitions, 3479 flow. Second operand 6 states and 159 transitions. [2024-06-14 14:06:16,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 315 transitions, 4331 flow [2024-06-14 14:06:17,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 315 transitions, 4161 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:17,343 INFO L231 Difference]: Finished difference. Result has 223 places, 289 transitions, 3593 flow [2024-06-14 14:06:17,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3593, PETRI_PLACES=223, PETRI_TRANSITIONS=289} [2024-06-14 14:06:17,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-14 14:06:17,344 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 289 transitions, 3593 flow [2024-06-14 14:06:17,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:17,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:17,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 14:06:17,344 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:17,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash 246786085, now seen corresponding path program 5 times [2024-06-14 14:06:17,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:17,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477052521] [2024-06-14 14:06:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:17,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:17,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:17,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477052521] [2024-06-14 14:06:17,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477052521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:17,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:17,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:17,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784245373] [2024-06-14 14:06:17,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:17,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:17,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:17,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:17,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:17,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 289 transitions, 3593 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:17,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:17,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:18,117 INFO L124 PetriNetUnfolderBase]: 1992/3432 cut-off events. [2024-06-14 14:06:18,117 INFO L125 PetriNetUnfolderBase]: For 149183/149189 co-relation queries the response was YES. [2024-06-14 14:06:18,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20844 conditions, 3432 events. 1992/3432 cut-off events. For 149183/149189 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21699 event pairs, 416 based on Foata normal form. 6/3433 useless extension candidates. Maximal degree in co-relation 20733. Up to 2821 conditions per place. [2024-06-14 14:06:18,152 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 118 changer transitions 0/329 dead transitions. [2024-06-14 14:06:18,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 329 transitions, 4927 flow [2024-06-14 14:06:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 14:06:18,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-14 14:06:18,153 INFO L175 Difference]: Start difference. First operand has 223 places, 289 transitions, 3593 flow. Second operand 9 states and 220 transitions. [2024-06-14 14:06:18,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 329 transitions, 4927 flow [2024-06-14 14:06:18,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4835 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:18,523 INFO L231 Difference]: Finished difference. Result has 229 places, 296 transitions, 3829 flow [2024-06-14 14:06:18,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3829, PETRI_PLACES=229, PETRI_TRANSITIONS=296} [2024-06-14 14:06:18,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-14 14:06:18,523 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 296 transitions, 3829 flow [2024-06-14 14:06:18,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:18,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:18,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 14:06:18,524 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:18,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:18,524 INFO L85 PathProgramCache]: Analyzing trace with hash 246400135, now seen corresponding path program 6 times [2024-06-14 14:06:18,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:18,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762196158] [2024-06-14 14:06:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:18,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:18,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:18,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762196158] [2024-06-14 14:06:18,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762196158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:18,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:18,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:18,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353282438] [2024-06-14 14:06:18,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:18,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:18,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:18,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:18,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 296 transitions, 3829 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:18,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:18,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:19,308 INFO L124 PetriNetUnfolderBase]: 1986/3424 cut-off events. [2024-06-14 14:06:19,309 INFO L125 PetriNetUnfolderBase]: For 152160/152166 co-relation queries the response was YES. [2024-06-14 14:06:19,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20994 conditions, 3424 events. 1986/3424 cut-off events. For 152160/152166 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21682 event pairs, 416 based on Foata normal form. 6/3425 useless extension candidates. Maximal degree in co-relation 20882. Up to 2816 conditions per place. [2024-06-14 14:06:19,345 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 115 changer transitions 0/326 dead transitions. [2024-06-14 14:06:19,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 326 transitions, 4973 flow [2024-06-14 14:06:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:06:19,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-14 14:06:19,347 INFO L175 Difference]: Start difference. First operand has 229 places, 296 transitions, 3829 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:06:19,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 326 transitions, 4973 flow [2024-06-14 14:06:19,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 326 transitions, 4711 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:19,705 INFO L231 Difference]: Finished difference. Result has 230 places, 296 transitions, 3822 flow [2024-06-14 14:06:19,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3822, PETRI_PLACES=230, PETRI_TRANSITIONS=296} [2024-06-14 14:06:19,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-14 14:06:19,706 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 296 transitions, 3822 flow [2024-06-14 14:06:19,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:19,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:19,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 14:06:19,707 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:19,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:19,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1436780941, now seen corresponding path program 1 times [2024-06-14 14:06:19,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:19,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808859942] [2024-06-14 14:06:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:19,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:19,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:19,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808859942] [2024-06-14 14:06:19,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808859942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:19,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:19,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:19,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171491308] [2024-06-14 14:06:19,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:19,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:19,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:19,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:19,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:19,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:19,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 296 transitions, 3822 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:19,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:19,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:20,383 INFO L124 PetriNetUnfolderBase]: 2007/3454 cut-off events. [2024-06-14 14:06:20,383 INFO L125 PetriNetUnfolderBase]: For 154341/154347 co-relation queries the response was YES. [2024-06-14 14:06:20,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21317 conditions, 3454 events. 2007/3454 cut-off events. For 154341/154347 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21857 event pairs, 423 based on Foata normal form. 1/3448 useless extension candidates. Maximal degree in co-relation 21205. Up to 2969 conditions per place. [2024-06-14 14:06:20,419 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 251 selfloop transitions, 68 changer transitions 0/326 dead transitions. [2024-06-14 14:06:20,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 326 transitions, 4878 flow [2024-06-14 14:06:20,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 14:06:20,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:06:20,420 INFO L175 Difference]: Start difference. First operand has 230 places, 296 transitions, 3822 flow. Second operand 6 states and 150 transitions. [2024-06-14 14:06:20,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 326 transitions, 4878 flow [2024-06-14 14:06:20,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 326 transitions, 4626 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:20,771 INFO L231 Difference]: Finished difference. Result has 228 places, 305 transitions, 3870 flow [2024-06-14 14:06:20,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3870, PETRI_PLACES=228, PETRI_TRANSITIONS=305} [2024-06-14 14:06:20,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-14 14:06:20,772 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 3870 flow [2024-06-14 14:06:20,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:20,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:20,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 14:06:20,773 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:20,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:20,773 INFO L85 PathProgramCache]: Analyzing trace with hash -283403825, now seen corresponding path program 2 times [2024-06-14 14:06:20,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:20,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623400173] [2024-06-14 14:06:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:20,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:20,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623400173] [2024-06-14 14:06:20,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623400173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:20,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:20,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:20,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027394200] [2024-06-14 14:06:20,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:20,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:20,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:20,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:20,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:21,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:21,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 305 transitions, 3870 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:21,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:21,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:21,492 INFO L124 PetriNetUnfolderBase]: 2012/3465 cut-off events. [2024-06-14 14:06:21,492 INFO L125 PetriNetUnfolderBase]: For 148983/148989 co-relation queries the response was YES. [2024-06-14 14:06:21,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21125 conditions, 3465 events. 2012/3465 cut-off events. For 148983/148989 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21963 event pairs, 408 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21014. Up to 3057 conditions per place. [2024-06-14 14:06:21,530 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 35 changer transitions 0/324 dead transitions. [2024-06-14 14:06:21,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 324 transitions, 4600 flow [2024-06-14 14:06:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 14:06:21,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-14 14:06:21,531 INFO L175 Difference]: Start difference. First operand has 228 places, 305 transitions, 3870 flow. Second operand 6 states and 143 transitions. [2024-06-14 14:06:21,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 324 transitions, 4600 flow [2024-06-14 14:06:21,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 324 transitions, 4430 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:21,910 INFO L231 Difference]: Finished difference. Result has 231 places, 308 transitions, 3838 flow [2024-06-14 14:06:21,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3838, PETRI_PLACES=231, PETRI_TRANSITIONS=308} [2024-06-14 14:06:21,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-14 14:06:21,911 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 308 transitions, 3838 flow [2024-06-14 14:06:21,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:21,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:21,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 14:06:21,912 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:21,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash -27023285, now seen corresponding path program 3 times [2024-06-14 14:06:21,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:21,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342029886] [2024-06-14 14:06:21,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:21,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:22,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:22,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342029886] [2024-06-14 14:06:22,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342029886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:22,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:22,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:22,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287000777] [2024-06-14 14:06:22,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:22,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:22,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:22,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:22,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 308 transitions, 3838 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:22,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:22,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:22,587 INFO L124 PetriNetUnfolderBase]: 2017/3468 cut-off events. [2024-06-14 14:06:22,587 INFO L125 PetriNetUnfolderBase]: For 154281/154287 co-relation queries the response was YES. [2024-06-14 14:06:22,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21164 conditions, 3468 events. 2017/3468 cut-off events. For 154281/154287 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21998 event pairs, 424 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21053. Up to 2981 conditions per place. [2024-06-14 14:06:22,622 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 252 selfloop transitions, 70 changer transitions 0/329 dead transitions. [2024-06-14 14:06:22,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 329 transitions, 4792 flow [2024-06-14 14:06:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:06:22,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-14 14:06:22,623 INFO L175 Difference]: Start difference. First operand has 231 places, 308 transitions, 3838 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:06:22,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 329 transitions, 4792 flow [2024-06-14 14:06:22,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 329 transitions, 4692 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:22,956 INFO L231 Difference]: Finished difference. Result has 232 places, 311 transitions, 3934 flow [2024-06-14 14:06:22,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3934, PETRI_PLACES=232, PETRI_TRANSITIONS=311} [2024-06-14 14:06:22,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-14 14:06:22,957 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 311 transitions, 3934 flow [2024-06-14 14:06:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:22,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:22,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 14:06:22,957 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:22,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1471358611, now seen corresponding path program 4 times [2024-06-14 14:06:22,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:22,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795080632] [2024-06-14 14:06:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795080632] [2024-06-14 14:06:23,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795080632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:23,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817356319] [2024-06-14 14:06:23,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:23,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:23,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 311 transitions, 3934 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:23,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:23,618 INFO L124 PetriNetUnfolderBase]: 2014/3464 cut-off events. [2024-06-14 14:06:23,618 INFO L125 PetriNetUnfolderBase]: For 157721/157727 co-relation queries the response was YES. [2024-06-14 14:06:23,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21247 conditions, 3464 events. 2014/3464 cut-off events. For 157721/157727 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21969 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21136. Up to 2978 conditions per place. [2024-06-14 14:06:23,653 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 249 selfloop transitions, 69 changer transitions 0/325 dead transitions. [2024-06-14 14:06:23,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 325 transitions, 4714 flow [2024-06-14 14:06:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 14:06:23,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 14:06:23,654 INFO L175 Difference]: Start difference. First operand has 232 places, 311 transitions, 3934 flow. Second operand 6 states and 141 transitions. [2024-06-14 14:06:23,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 325 transitions, 4714 flow [2024-06-14 14:06:24,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 325 transitions, 4514 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:24,036 INFO L231 Difference]: Finished difference. Result has 234 places, 311 transitions, 3878 flow [2024-06-14 14:06:24,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3878, PETRI_PLACES=234, PETRI_TRANSITIONS=311} [2024-06-14 14:06:24,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 14:06:24,037 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 311 transitions, 3878 flow [2024-06-14 14:06:24,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:24,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:24,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 14:06:24,038 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:24,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash 621287301, now seen corresponding path program 2 times [2024-06-14 14:06:24,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:24,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157409466] [2024-06-14 14:06:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:24,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:24,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:24,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157409466] [2024-06-14 14:06:24,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157409466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:24,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:24,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167410275] [2024-06-14 14:06:24,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:24,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:24,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:24,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:24,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:24,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 311 transitions, 3878 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:24,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:24,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:24,740 INFO L124 PetriNetUnfolderBase]: 2019/3468 cut-off events. [2024-06-14 14:06:24,740 INFO L125 PetriNetUnfolderBase]: For 161230/161230 co-relation queries the response was YES. [2024-06-14 14:06:24,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21348 conditions, 3468 events. 2019/3468 cut-off events. For 161230/161230 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21954 event pairs, 418 based on Foata normal form. 1/3462 useless extension candidates. Maximal degree in co-relation 21236. Up to 3013 conditions per place. [2024-06-14 14:06:24,774 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 64 changer transitions 0/330 dead transitions. [2024-06-14 14:06:24,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 330 transitions, 4844 flow [2024-06-14 14:06:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:06:24,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 14:06:24,775 INFO L175 Difference]: Start difference. First operand has 234 places, 311 transitions, 3878 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:06:24,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 330 transitions, 4844 flow [2024-06-14 14:06:25,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 330 transitions, 4659 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:25,145 INFO L231 Difference]: Finished difference. Result has 236 places, 314 transitions, 3885 flow [2024-06-14 14:06:25,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3693, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3885, PETRI_PLACES=236, PETRI_TRANSITIONS=314} [2024-06-14 14:06:25,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-14 14:06:25,145 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 314 transitions, 3885 flow [2024-06-14 14:06:25,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:25,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:25,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:25,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 14:06:25,146 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:25,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:25,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1492685043, now seen corresponding path program 5 times [2024-06-14 14:06:25,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:25,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561511352] [2024-06-14 14:06:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:25,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:25,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:25,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561511352] [2024-06-14 14:06:25,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561511352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:25,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:25,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096449574] [2024-06-14 14:06:25,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:25,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:25,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:25,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:25,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:25,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:25,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 314 transitions, 3885 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:25,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:25,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:25,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:25,822 INFO L124 PetriNetUnfolderBase]: 2013/3465 cut-off events. [2024-06-14 14:06:25,822 INFO L125 PetriNetUnfolderBase]: For 165710/165716 co-relation queries the response was YES. [2024-06-14 14:06:25,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21170 conditions, 3465 events. 2013/3465 cut-off events. For 165710/165716 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22014 event pairs, 423 based on Foata normal form. 6/3463 useless extension candidates. Maximal degree in co-relation 21058. Up to 2994 conditions per place. [2024-06-14 14:06:25,856 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 59 changer transitions 0/330 dead transitions. [2024-06-14 14:06:25,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 330 transitions, 4685 flow [2024-06-14 14:06:25,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 14:06:25,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:06:25,857 INFO L175 Difference]: Start difference. First operand has 236 places, 314 transitions, 3885 flow. Second operand 5 states and 126 transitions. [2024-06-14 14:06:25,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 330 transitions, 4685 flow [2024-06-14 14:06:26,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 330 transitions, 4542 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:26,376 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3874 flow [2024-06-14 14:06:26,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3742, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3874, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-14 14:06:26,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-14 14:06:26,377 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3874 flow [2024-06-14 14:06:26,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:26,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:26,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:26,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 14:06:26,378 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:26,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash -23299051, now seen corresponding path program 6 times [2024-06-14 14:06:26,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:26,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254598898] [2024-06-14 14:06:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:26,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:26,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254598898] [2024-06-14 14:06:26,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254598898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:26,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:26,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304943945] [2024-06-14 14:06:26,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:26,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:26,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:26,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:26,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:26,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3874 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:26,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:26,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:26,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:27,100 INFO L124 PetriNetUnfolderBase]: 2007/3463 cut-off events. [2024-06-14 14:06:27,100 INFO L125 PetriNetUnfolderBase]: For 167550/167556 co-relation queries the response was YES. [2024-06-14 14:06:27,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21070 conditions, 3463 events. 2007/3463 cut-off events. For 167550/167556 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22001 event pairs, 407 based on Foata normal form. 6/3464 useless extension candidates. Maximal degree in co-relation 20956. Up to 2988 conditions per place. [2024-06-14 14:06:27,135 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 67 changer transitions 0/340 dead transitions. [2024-06-14 14:06:27,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 340 transitions, 4606 flow [2024-06-14 14:06:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:06:27,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 14:06:27,136 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3874 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:06:27,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 340 transitions, 4606 flow [2024-06-14 14:06:27,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 340 transitions, 4427 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:27,675 INFO L231 Difference]: Finished difference. Result has 238 places, 314 transitions, 3846 flow [2024-06-14 14:06:27,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3846, PETRI_PLACES=238, PETRI_TRANSITIONS=314} [2024-06-14 14:06:27,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-14 14:06:27,676 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 314 transitions, 3846 flow [2024-06-14 14:06:27,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:27,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:27,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:27,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 14:06:27,677 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:27,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash 246791045, now seen corresponding path program 3 times [2024-06-14 14:06:27,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:27,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173339509] [2024-06-14 14:06:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:27,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:27,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:27,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173339509] [2024-06-14 14:06:27,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173339509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:27,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:27,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:27,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370535341] [2024-06-14 14:06:27,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:27,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:27,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:27,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:27,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:27,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 314 transitions, 3846 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:27,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:27,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:27,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:28,386 INFO L124 PetriNetUnfolderBase]: 2004/3459 cut-off events. [2024-06-14 14:06:28,386 INFO L125 PetriNetUnfolderBase]: For 164127/164133 co-relation queries the response was YES. [2024-06-14 14:06:28,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20977 conditions, 3459 events. 2004/3459 cut-off events. For 164127/164133 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22013 event pairs, 414 based on Foata normal form. 5/3459 useless extension candidates. Maximal degree in co-relation 20863. Up to 2994 conditions per place. [2024-06-14 14:06:28,421 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 259 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-14 14:06:28,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 331 transitions, 4652 flow [2024-06-14 14:06:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:06:28,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:06:28,423 INFO L175 Difference]: Start difference. First operand has 238 places, 314 transitions, 3846 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:06:28,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 331 transitions, 4652 flow [2024-06-14 14:06:28,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 331 transitions, 4492 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:28,833 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3830 flow [2024-06-14 14:06:28,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3690, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3830, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-14 14:06:28,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-14 14:06:28,834 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3830 flow [2024-06-14 14:06:28,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:28,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:28,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:28,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 14:06:28,834 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:28,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash 612909549, now seen corresponding path program 4 times [2024-06-14 14:06:28,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:28,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119051020] [2024-06-14 14:06:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:28,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:29,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:29,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119051020] [2024-06-14 14:06:29,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119051020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:29,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:29,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:29,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97519776] [2024-06-14 14:06:29,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:29,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:29,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:29,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:29,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:29,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3830 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:29,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:29,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:29,606 INFO L124 PetriNetUnfolderBase]: 2001/3444 cut-off events. [2024-06-14 14:06:29,606 INFO L125 PetriNetUnfolderBase]: For 156757/156757 co-relation queries the response was YES. [2024-06-14 14:06:29,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20753 conditions, 3444 events. 2001/3444 cut-off events. For 156757/156757 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21818 event pairs, 417 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 20639. Up to 2991 conditions per place. [2024-06-14 14:06:29,637 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 255 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-14 14:06:29,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 327 transitions, 4502 flow [2024-06-14 14:06:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 14:06:29,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:06:29,638 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3830 flow. Second operand 6 states and 142 transitions. [2024-06-14 14:06:29,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 327 transitions, 4502 flow [2024-06-14 14:06:29,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 327 transitions, 4318 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:29,951 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3786 flow [2024-06-14 14:06:29,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-14 14:06:29,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-14 14:06:29,952 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3786 flow [2024-06-14 14:06:29,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:29,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:29,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 14:06:29,952 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:29,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1012718179, now seen corresponding path program 2 times [2024-06-14 14:06:29,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:29,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935554549] [2024-06-14 14:06:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:29,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:30,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:30,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935554549] [2024-06-14 14:06:30,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935554549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:30,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:30,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:30,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093761967] [2024-06-14 14:06:30,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:30,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:30,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:30,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:30,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:30,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:30,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3786 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:30,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:30,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:30,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:30,667 INFO L124 PetriNetUnfolderBase]: 2017/3479 cut-off events. [2024-06-14 14:06:30,667 INFO L125 PetriNetUnfolderBase]: For 162773/162779 co-relation queries the response was YES. [2024-06-14 14:06:30,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20873 conditions, 3479 events. 2017/3479 cut-off events. For 162773/162779 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22125 event pairs, 416 based on Foata normal form. 8/3482 useless extension candidates. Maximal degree in co-relation 20760. Up to 2991 conditions per place. [2024-06-14 14:06:30,703 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 256 selfloop transitions, 71 changer transitions 0/334 dead transitions. [2024-06-14 14:06:30,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 334 transitions, 4540 flow [2024-06-14 14:06:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:06:30,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:06:30,704 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3786 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:06:30,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 334 transitions, 4540 flow [2024-06-14 14:06:31,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 334 transitions, 4332 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:31,165 INFO L231 Difference]: Finished difference. Result has 236 places, 317 transitions, 3794 flow [2024-06-14 14:06:31,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3794, PETRI_PLACES=236, PETRI_TRANSITIONS=317} [2024-06-14 14:06:31,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-14 14:06:31,166 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 317 transitions, 3794 flow [2024-06-14 14:06:31,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:31,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:31,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:31,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 14:06:31,167 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:31,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash 259312193, now seen corresponding path program 3 times [2024-06-14 14:06:31,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:31,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173334930] [2024-06-14 14:06:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:31,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:31,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173334930] [2024-06-14 14:06:31,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173334930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:31,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:31,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:31,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182616317] [2024-06-14 14:06:31,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:31,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:31,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:31,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:31,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:31,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:31,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 317 transitions, 3794 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:31,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:31,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:31,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:31,922 INFO L124 PetriNetUnfolderBase]: 2033/3505 cut-off events. [2024-06-14 14:06:31,922 INFO L125 PetriNetUnfolderBase]: For 161799/161799 co-relation queries the response was YES. [2024-06-14 14:06:31,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21186 conditions, 3505 events. 2033/3505 cut-off events. For 161799/161799 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22249 event pairs, 397 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 21073. Up to 3067 conditions per place. [2024-06-14 14:06:31,955 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 287 selfloop transitions, 46 changer transitions 0/340 dead transitions. [2024-06-14 14:06:31,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 340 transitions, 4574 flow [2024-06-14 14:06:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:06:31,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:06:31,956 INFO L175 Difference]: Start difference. First operand has 236 places, 317 transitions, 3794 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:06:31,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 340 transitions, 4574 flow [2024-06-14 14:06:32,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 340 transitions, 4380 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:32,390 INFO L231 Difference]: Finished difference. Result has 238 places, 320 transitions, 3768 flow [2024-06-14 14:06:32,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3768, PETRI_PLACES=238, PETRI_TRANSITIONS=320} [2024-06-14 14:06:32,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-14 14:06:32,391 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 320 transitions, 3768 flow [2024-06-14 14:06:32,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:32,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:32,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 14:06:32,391 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:32,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash -999758629, now seen corresponding path program 4 times [2024-06-14 14:06:32,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:32,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307371563] [2024-06-14 14:06:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:32,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:32,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307371563] [2024-06-14 14:06:32,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307371563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:32,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:32,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092770724] [2024-06-14 14:06:32,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:32,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:32,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:32,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:32,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:32,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:32,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 320 transitions, 3768 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:32,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:32,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,140 INFO L124 PetriNetUnfolderBase]: 2065/3559 cut-off events. [2024-06-14 14:06:33,141 INFO L125 PetriNetUnfolderBase]: For 165096/165096 co-relation queries the response was YES. [2024-06-14 14:06:33,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21504 conditions, 3559 events. 2065/3559 cut-off events. For 165096/165096 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 22663 event pairs, 396 based on Foata normal form. 4/3560 useless extension candidates. Maximal degree in co-relation 21390. Up to 3060 conditions per place. [2024-06-14 14:06:33,176 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 294 selfloop transitions, 44 changer transitions 0/345 dead transitions. [2024-06-14 14:06:33,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 345 transitions, 4726 flow [2024-06-14 14:06:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 14:06:33,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:06:33,177 INFO L175 Difference]: Start difference. First operand has 238 places, 320 transitions, 3768 flow. Second operand 6 states and 147 transitions. [2024-06-14 14:06:33,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 345 transitions, 4726 flow [2024-06-14 14:06:33,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 345 transitions, 4586 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:33,600 INFO L231 Difference]: Finished difference. Result has 241 places, 326 transitions, 3863 flow [2024-06-14 14:06:33,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3863, PETRI_PLACES=241, PETRI_TRANSITIONS=326} [2024-06-14 14:06:33,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-14 14:06:33,601 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 326 transitions, 3863 flow [2024-06-14 14:06:33,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:33,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:33,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 14:06:33,601 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:33,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash -35706805, now seen corresponding path program 1 times [2024-06-14 14:06:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:33,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092473639] [2024-06-14 14:06:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:33,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:33,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:33,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092473639] [2024-06-14 14:06:33,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092473639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:33,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:33,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:33,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713329249] [2024-06-14 14:06:33,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:33,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:33,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:33,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:33,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:33,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:33,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 326 transitions, 3863 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:33,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:33,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:34,357 INFO L124 PetriNetUnfolderBase]: 2094/3602 cut-off events. [2024-06-14 14:06:34,357 INFO L125 PetriNetUnfolderBase]: For 176792/176792 co-relation queries the response was YES. [2024-06-14 14:06:34,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22101 conditions, 3602 events. 2094/3602 cut-off events. For 176792/176792 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22985 event pairs, 374 based on Foata normal form. 4/3598 useless extension candidates. Maximal degree in co-relation 21985. Up to 3024 conditions per place. [2024-06-14 14:06:34,393 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 83 changer transitions 0/355 dead transitions. [2024-06-14 14:06:34,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 355 transitions, 4843 flow [2024-06-14 14:06:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:06:34,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 14:06:34,395 INFO L175 Difference]: Start difference. First operand has 241 places, 326 transitions, 3863 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:06:34,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 355 transitions, 4843 flow [2024-06-14 14:06:34,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 355 transitions, 4720 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:34,872 INFO L231 Difference]: Finished difference. Result has 246 places, 332 transitions, 4030 flow [2024-06-14 14:06:34,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4030, PETRI_PLACES=246, PETRI_TRANSITIONS=332} [2024-06-14 14:06:34,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-14 14:06:34,872 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 332 transitions, 4030 flow [2024-06-14 14:06:34,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:34,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:34,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 14:06:34,873 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:34,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:34,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1377403793, now seen corresponding path program 2 times [2024-06-14 14:06:34,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:34,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842612600] [2024-06-14 14:06:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:34,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:35,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:35,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842612600] [2024-06-14 14:06:35,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842612600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:35,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:35,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:35,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826131737] [2024-06-14 14:06:35,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:35,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:35,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:35,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:35,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 332 transitions, 4030 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:35,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:35,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:35,636 INFO L124 PetriNetUnfolderBase]: 2110/3621 cut-off events. [2024-06-14 14:06:35,636 INFO L125 PetriNetUnfolderBase]: For 181977/181977 co-relation queries the response was YES. [2024-06-14 14:06:35,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22466 conditions, 3621 events. 2110/3621 cut-off events. For 181977/181977 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23084 event pairs, 431 based on Foata normal form. 4/3617 useless extension candidates. Maximal degree in co-relation 22348. Up to 3116 conditions per place. [2024-06-14 14:06:35,674 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/353 dead transitions. [2024-06-14 14:06:35,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 353 transitions, 4828 flow [2024-06-14 14:06:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:06:35,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-14 14:06:35,676 INFO L175 Difference]: Start difference. First operand has 246 places, 332 transitions, 4030 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:06:35,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 353 transitions, 4828 flow [2024-06-14 14:06:36,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 353 transitions, 4636 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:36,093 INFO L231 Difference]: Finished difference. Result has 250 places, 335 transitions, 4068 flow [2024-06-14 14:06:36,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4068, PETRI_PLACES=250, PETRI_TRANSITIONS=335} [2024-06-14 14:06:36,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 14:06:36,093 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 335 transitions, 4068 flow [2024-06-14 14:06:36,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:36,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:36,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 14:06:36,094 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:36,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1492694963, now seen corresponding path program 3 times [2024-06-14 14:06:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:36,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721832180] [2024-06-14 14:06:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:36,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721832180] [2024-06-14 14:06:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721832180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:36,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:36,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:36,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801468952] [2024-06-14 14:06:36,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:36,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:36,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:36,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:36,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 335 transitions, 4068 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:36,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:36,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:36,883 INFO L124 PetriNetUnfolderBase]: 2126/3650 cut-off events. [2024-06-14 14:06:36,883 INFO L125 PetriNetUnfolderBase]: For 186689/186689 co-relation queries the response was YES. [2024-06-14 14:06:36,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22639 conditions, 3650 events. 2126/3650 cut-off events. For 186689/186689 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23252 event pairs, 415 based on Foata normal form. 4/3647 useless extension candidates. Maximal degree in co-relation 22519. Up to 3215 conditions per place. [2024-06-14 14:06:36,923 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 307 selfloop transitions, 39 changer transitions 0/353 dead transitions. [2024-06-14 14:06:36,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 353 transitions, 4838 flow [2024-06-14 14:06:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 14:06:36,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-14 14:06:36,924 INFO L175 Difference]: Start difference. First operand has 250 places, 335 transitions, 4068 flow. Second operand 7 states and 160 transitions. [2024-06-14 14:06:36,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 353 transitions, 4838 flow [2024-06-14 14:06:37,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 353 transitions, 4662 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:37,289 INFO L231 Difference]: Finished difference. Result has 252 places, 338 transitions, 4024 flow [2024-06-14 14:06:37,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4024, PETRI_PLACES=252, PETRI_TRANSITIONS=338} [2024-06-14 14:06:37,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-14 14:06:37,290 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 338 transitions, 4024 flow [2024-06-14 14:06:37,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:37,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:37,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 14:06:37,290 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:37,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:37,291 INFO L85 PathProgramCache]: Analyzing trace with hash 82626023, now seen corresponding path program 1 times [2024-06-14 14:06:37,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:37,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194513369] [2024-06-14 14:06:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:37,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:37,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:37,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194513369] [2024-06-14 14:06:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194513369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:37,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:37,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186946121] [2024-06-14 14:06:37,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:37,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:37,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:37,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:37,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 338 transitions, 4024 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:37,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:37,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:38,050 INFO L124 PetriNetUnfolderBase]: 2142/3673 cut-off events. [2024-06-14 14:06:38,050 INFO L125 PetriNetUnfolderBase]: For 192728/192728 co-relation queries the response was YES. [2024-06-14 14:06:38,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22821 conditions, 3673 events. 2142/3673 cut-off events. For 192728/192728 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23431 event pairs, 424 based on Foata normal form. 4/3670 useless extension candidates. Maximal degree in co-relation 22700. Up to 3190 conditions per place. [2024-06-14 14:06:38,089 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 67 changer transitions 0/356 dead transitions. [2024-06-14 14:06:38,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 356 transitions, 4826 flow [2024-06-14 14:06:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 14:06:38,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-14 14:06:38,090 INFO L175 Difference]: Start difference. First operand has 252 places, 338 transitions, 4024 flow. Second operand 7 states and 162 transitions. [2024-06-14 14:06:38,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 356 transitions, 4826 flow [2024-06-14 14:06:38,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 356 transitions, 4722 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:38,565 INFO L231 Difference]: Finished difference. Result has 254 places, 341 transitions, 4134 flow [2024-06-14 14:06:38,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4134, PETRI_PLACES=254, PETRI_TRANSITIONS=341} [2024-06-14 14:06:38,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-14 14:06:38,565 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 341 transitions, 4134 flow [2024-06-14 14:06:38,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:38,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:38,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 14:06:38,566 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:38,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:38,566 INFO L85 PathProgramCache]: Analyzing trace with hash 453483979, now seen corresponding path program 4 times [2024-06-14 14:06:38,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:38,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625353721] [2024-06-14 14:06:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:38,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:38,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:38,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625353721] [2024-06-14 14:06:38,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625353721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:38,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:38,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:38,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368765904] [2024-06-14 14:06:38,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:38,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:38,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:38,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:38,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:38,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:38,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 341 transitions, 4134 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:38,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:38,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:39,369 INFO L124 PetriNetUnfolderBase]: 2132/3665 cut-off events. [2024-06-14 14:06:39,370 INFO L125 PetriNetUnfolderBase]: For 191286/191286 co-relation queries the response was YES. [2024-06-14 14:06:39,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 3665 events. 2132/3665 cut-off events. For 191286/191286 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23397 event pairs, 358 based on Foata normal form. 4/3662 useless extension candidates. Maximal degree in co-relation 22587. Up to 3115 conditions per place. [2024-06-14 14:06:39,409 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 76 changer transitions 0/365 dead transitions. [2024-06-14 14:06:39,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 365 transitions, 4910 flow [2024-06-14 14:06:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:06:39,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 14:06:39,411 INFO L175 Difference]: Start difference. First operand has 254 places, 341 transitions, 4134 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:06:39,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 365 transitions, 4910 flow [2024-06-14 14:06:39,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 365 transitions, 4698 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:39,792 INFO L231 Difference]: Finished difference. Result has 256 places, 341 transitions, 4089 flow [2024-06-14 14:06:39,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4089, PETRI_PLACES=256, PETRI_TRANSITIONS=341} [2024-06-14 14:06:39,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-14 14:06:39,793 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 341 transitions, 4089 flow [2024-06-14 14:06:39,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:39,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:39,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:39,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 14:06:39,794 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:39,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:39,794 INFO L85 PathProgramCache]: Analyzing trace with hash 619181531, now seen corresponding path program 2 times [2024-06-14 14:06:39,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:39,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250969988] [2024-06-14 14:06:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:39,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:40,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:40,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250969988] [2024-06-14 14:06:40,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250969988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:40,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:40,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694000258] [2024-06-14 14:06:40,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:40,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:40,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:40,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 341 transitions, 4089 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:40,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:40,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:40,638 INFO L124 PetriNetUnfolderBase]: 2148/3691 cut-off events. [2024-06-14 14:06:40,639 INFO L125 PetriNetUnfolderBase]: For 195623/195623 co-relation queries the response was YES. [2024-06-14 14:06:40,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22867 conditions, 3691 events. 2148/3691 cut-off events. For 195623/195623 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23587 event pairs, 400 based on Foata normal form. 4/3692 useless extension candidates. Maximal degree in co-relation 22744. Up to 3240 conditions per place. [2024-06-14 14:06:40,676 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 46 changer transitions 0/364 dead transitions. [2024-06-14 14:06:40,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 364 transitions, 4897 flow [2024-06-14 14:06:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:06:40,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:06:40,678 INFO L175 Difference]: Start difference. First operand has 256 places, 341 transitions, 4089 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:06:40,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 364 transitions, 4897 flow [2024-06-14 14:06:41,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 364 transitions, 4733 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:41,079 INFO L231 Difference]: Finished difference. Result has 256 places, 344 transitions, 4073 flow [2024-06-14 14:06:41,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4073, PETRI_PLACES=256, PETRI_TRANSITIONS=344} [2024-06-14 14:06:41,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-14 14:06:41,080 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 344 transitions, 4073 flow [2024-06-14 14:06:41,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:41,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:41,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:41,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 14:06:41,080 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:41,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:41,081 INFO L85 PathProgramCache]: Analyzing trace with hash 690140707, now seen corresponding path program 3 times [2024-06-14 14:06:41,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:41,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496186480] [2024-06-14 14:06:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:41,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:41,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:41,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496186480] [2024-06-14 14:06:41,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496186480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:41,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:41,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:41,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265291729] [2024-06-14 14:06:41,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:41,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:41,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:41,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:41,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:41,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:41,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 344 transitions, 4073 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:41,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:41,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:41,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:41,873 INFO L124 PetriNetUnfolderBase]: 2135/3672 cut-off events. [2024-06-14 14:06:41,873 INFO L125 PetriNetUnfolderBase]: For 187334/187334 co-relation queries the response was YES. [2024-06-14 14:06:41,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22416 conditions, 3672 events. 2135/3672 cut-off events. For 187334/187334 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23432 event pairs, 395 based on Foata normal form. 4/3673 useless extension candidates. Maximal degree in co-relation 22292. Up to 3163 conditions per place. [2024-06-14 14:06:41,911 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 308 selfloop transitions, 47 changer transitions 0/362 dead transitions. [2024-06-14 14:06:41,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 362 transitions, 4827 flow [2024-06-14 14:06:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:06:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:06:41,912 INFO L175 Difference]: Start difference. First operand has 256 places, 344 transitions, 4073 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:06:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 362 transitions, 4827 flow [2024-06-14 14:06:42,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 362 transitions, 4689 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:42,338 INFO L231 Difference]: Finished difference. Result has 258 places, 344 transitions, 4037 flow [2024-06-14 14:06:42,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4037, PETRI_PLACES=258, PETRI_TRANSITIONS=344} [2024-06-14 14:06:42,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-14 14:06:42,338 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 344 transitions, 4037 flow [2024-06-14 14:06:42,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:42,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:42,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:42,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 14:06:42,339 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:42,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:42,339 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 4 times [2024-06-14 14:06:42,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:42,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245519979] [2024-06-14 14:06:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:42,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:42,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245519979] [2024-06-14 14:06:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245519979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:42,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:42,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:42,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971523632] [2024-06-14 14:06:42,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:42,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:42,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:42,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:42,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:42,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 344 transitions, 4037 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:42,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:42,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:42,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:43,179 INFO L124 PetriNetUnfolderBase]: 2138/3658 cut-off events. [2024-06-14 14:06:43,179 INFO L125 PetriNetUnfolderBase]: For 189742/189742 co-relation queries the response was YES. [2024-06-14 14:06:43,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22339 conditions, 3658 events. 2138/3658 cut-off events. For 189742/189742 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23315 event pairs, 422 based on Foata normal form. 4/3655 useless extension candidates. Maximal degree in co-relation 22214. Up to 3174 conditions per place. [2024-06-14 14:06:43,224 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 283 selfloop transitions, 71 changer transitions 0/361 dead transitions. [2024-06-14 14:06:43,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 361 transitions, 4853 flow [2024-06-14 14:06:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 14:06:43,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-14 14:06:43,225 INFO L175 Difference]: Start difference. First operand has 258 places, 344 transitions, 4037 flow. Second operand 6 states and 143 transitions. [2024-06-14 14:06:43,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 361 transitions, 4853 flow [2024-06-14 14:06:43,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 361 transitions, 4740 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:43,689 INFO L231 Difference]: Finished difference. Result has 259 places, 347 transitions, 4156 flow [2024-06-14 14:06:43,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4156, PETRI_PLACES=259, PETRI_TRANSITIONS=347} [2024-06-14 14:06:43,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 14:06:43,689 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 347 transitions, 4156 flow [2024-06-14 14:06:43,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:43,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:43,690 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] [2024-06-14 14:06:43,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 14:06:43,690 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:43,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:43,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1110363624, now seen corresponding path program 1 times [2024-06-14 14:06:43,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:43,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994188052] [2024-06-14 14:06:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:43,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:43,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:43,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994188052] [2024-06-14 14:06:43,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994188052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:43,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:43,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:43,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809457514] [2024-06-14 14:06:43,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:43,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:43,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:43,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:43,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:43,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 347 transitions, 4156 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:43,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:43,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:43,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:44,521 INFO L124 PetriNetUnfolderBase]: 2151/3692 cut-off events. [2024-06-14 14:06:44,521 INFO L125 PetriNetUnfolderBase]: For 192465/192471 co-relation queries the response was YES. [2024-06-14 14:06:44,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22759 conditions, 3692 events. 2151/3692 cut-off events. For 192465/192471 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23554 event pairs, 418 based on Foata normal form. 5/3692 useless extension candidates. Maximal degree in co-relation 22633. Up to 3204 conditions per place. [2024-06-14 14:06:44,562 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 73 changer transitions 0/374 dead transitions. [2024-06-14 14:06:44,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 374 transitions, 5158 flow [2024-06-14 14:06:44,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 14:06:44,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-14 14:06:44,563 INFO L175 Difference]: Start difference. First operand has 259 places, 347 transitions, 4156 flow. Second operand 10 states and 219 transitions. [2024-06-14 14:06:44,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 374 transitions, 5158 flow [2024-06-14 14:06:45,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 374 transitions, 4952 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:45,275 INFO L231 Difference]: Finished difference. Result has 266 places, 353 transitions, 4209 flow [2024-06-14 14:06:45,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3952, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4209, PETRI_PLACES=266, PETRI_TRANSITIONS=353} [2024-06-14 14:06:45,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 14:06:45,275 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 353 transitions, 4209 flow [2024-06-14 14:06:45,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:45,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:45,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 14:06:45,276 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:45,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1590534910, now seen corresponding path program 2 times [2024-06-14 14:06:45,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:45,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509002829] [2024-06-14 14:06:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:45,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:45,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:45,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509002829] [2024-06-14 14:06:45,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509002829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:45,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:45,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:45,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010099189] [2024-06-14 14:06:45,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:45,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:45,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:45,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:45,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:45,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:45,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 353 transitions, 4209 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:45,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:45,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:46,044 INFO L124 PetriNetUnfolderBase]: 2172/3725 cut-off events. [2024-06-14 14:06:46,045 INFO L125 PetriNetUnfolderBase]: For 195500/195506 co-relation queries the response was YES. [2024-06-14 14:06:46,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22891 conditions, 3725 events. 2172/3725 cut-off events. For 195500/195506 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23806 event pairs, 448 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 22763. Up to 3068 conditions per place. [2024-06-14 14:06:46,084 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 140 changer transitions 0/385 dead transitions. [2024-06-14 14:06:46,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 385 transitions, 5549 flow [2024-06-14 14:06:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:06:46,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-14 14:06:46,085 INFO L175 Difference]: Start difference. First operand has 266 places, 353 transitions, 4209 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:06:46,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 385 transitions, 5549 flow [2024-06-14 14:06:46,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 385 transitions, 5364 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:46,696 INFO L231 Difference]: Finished difference. Result has 266 places, 362 transitions, 4448 flow [2024-06-14 14:06:46,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4448, PETRI_PLACES=266, PETRI_TRANSITIONS=362} [2024-06-14 14:06:46,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 14:06:46,697 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 362 transitions, 4448 flow [2024-06-14 14:06:46,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:46,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:46,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:46,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 14:06:46,697 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:46,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1586810260, now seen corresponding path program 3 times [2024-06-14 14:06:46,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:46,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917889550] [2024-06-14 14:06:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:46,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:46,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:46,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917889550] [2024-06-14 14:06:46,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917889550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:46,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:46,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:46,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158105550] [2024-06-14 14:06:46,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:46,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:46,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:46,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:46,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:46,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 362 transitions, 4448 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:46,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:46,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:46,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:47,492 INFO L124 PetriNetUnfolderBase]: 2177/3736 cut-off events. [2024-06-14 14:06:47,492 INFO L125 PetriNetUnfolderBase]: For 201427/201433 co-relation queries the response was YES. [2024-06-14 14:06:47,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23168 conditions, 3736 events. 2177/3736 cut-off events. For 201427/201433 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23909 event pairs, 419 based on Foata normal form. 5/3736 useless extension candidates. Maximal degree in co-relation 23039. Up to 3242 conditions per place. [2024-06-14 14:06:47,533 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 305 selfloop transitions, 73 changer transitions 0/385 dead transitions. [2024-06-14 14:06:47,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 385 transitions, 5424 flow [2024-06-14 14:06:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 14:06:47,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 14:06:47,534 INFO L175 Difference]: Start difference. First operand has 266 places, 362 transitions, 4448 flow. Second operand 9 states and 201 transitions. [2024-06-14 14:06:47,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 385 transitions, 5424 flow [2024-06-14 14:06:48,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 385 transitions, 5114 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:48,280 INFO L231 Difference]: Finished difference. Result has 271 places, 365 transitions, 4330 flow [2024-06-14 14:06:48,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4330, PETRI_PLACES=271, PETRI_TRANSITIONS=365} [2024-06-14 14:06:48,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 14:06:48,280 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 365 transitions, 4330 flow [2024-06-14 14:06:48,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:48,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:48,281 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] [2024-06-14 14:06:48,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 14:06:48,281 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:48,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1368889870, now seen corresponding path program 4 times [2024-06-14 14:06:48,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:48,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258828562] [2024-06-14 14:06:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:48,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:48,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258828562] [2024-06-14 14:06:48,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258828562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:48,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:48,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:48,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119950399] [2024-06-14 14:06:48,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:48,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:48,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:48,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:48,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 365 transitions, 4330 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:48,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:48,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:48,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:49,050 INFO L124 PetriNetUnfolderBase]: 2182/3739 cut-off events. [2024-06-14 14:06:49,050 INFO L125 PetriNetUnfolderBase]: For 206525/206531 co-relation queries the response was YES. [2024-06-14 14:06:49,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23106 conditions, 3739 events. 2182/3739 cut-off events. For 206525/206531 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23919 event pairs, 443 based on Foata normal form. 5/3736 useless extension candidates. Maximal degree in co-relation 22977. Up to 3080 conditions per place. [2024-06-14 14:06:49,093 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 240 selfloop transitions, 140 changer transitions 0/387 dead transitions. [2024-06-14 14:06:49,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 387 transitions, 5448 flow [2024-06-14 14:06:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:06:49,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-14 14:06:49,094 INFO L175 Difference]: Start difference. First operand has 271 places, 365 transitions, 4330 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:06:49,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 387 transitions, 5448 flow [2024-06-14 14:06:49,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 387 transitions, 5292 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:49,760 INFO L231 Difference]: Finished difference. Result has 271 places, 368 transitions, 4504 flow [2024-06-14 14:06:49,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4504, PETRI_PLACES=271, PETRI_TRANSITIONS=368} [2024-06-14 14:06:49,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 14:06:49,760 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 368 transitions, 4504 flow [2024-06-14 14:06:49,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:49,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:49,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:49,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 14:06:49,761 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:49,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:49,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1484346568, now seen corresponding path program 5 times [2024-06-14 14:06:49,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:49,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088104599] [2024-06-14 14:06:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:49,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:49,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:49,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088104599] [2024-06-14 14:06:49,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088104599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:49,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:49,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:49,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111888595] [2024-06-14 14:06:49,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:49,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:49,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:49,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:49,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:49,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 368 transitions, 4504 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:49,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:49,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:49,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:50,553 INFO L124 PetriNetUnfolderBase]: 2179/3741 cut-off events. [2024-06-14 14:06:50,554 INFO L125 PetriNetUnfolderBase]: For 209823/209829 co-relation queries the response was YES. [2024-06-14 14:06:50,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23290 conditions, 3741 events. 2179/3741 cut-off events. For 209823/209829 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23954 event pairs, 419 based on Foata normal form. 5/3741 useless extension candidates. Maximal degree in co-relation 23160. Up to 3246 conditions per place. [2024-06-14 14:06:50,596 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 72 changer transitions 0/385 dead transitions. [2024-06-14 14:06:50,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 385 transitions, 5302 flow [2024-06-14 14:06:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:06:50,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-14 14:06:50,599 INFO L175 Difference]: Start difference. First operand has 271 places, 368 transitions, 4504 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:06:50,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 385 transitions, 5302 flow [2024-06-14 14:06:51,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 385 transitions, 4937 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:51,204 INFO L231 Difference]: Finished difference. Result has 273 places, 368 transitions, 4289 flow [2024-06-14 14:06:51,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4289, PETRI_PLACES=273, PETRI_TRANSITIONS=368} [2024-06-14 14:06:51,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-14 14:06:51,205 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 368 transitions, 4289 flow [2024-06-14 14:06:51,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:51,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:51,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:51,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 14:06:51,206 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:51,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash -453490104, now seen corresponding path program 6 times [2024-06-14 14:06:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:51,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170094117] [2024-06-14 14:06:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:51,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:51,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170094117] [2024-06-14 14:06:51,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170094117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:51,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:51,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:51,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847378414] [2024-06-14 14:06:51,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:51,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:51,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:51,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:51,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 368 transitions, 4289 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:51,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:51,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:51,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:52,031 INFO L124 PetriNetUnfolderBase]: 2184/3732 cut-off events. [2024-06-14 14:06:52,032 INFO L125 PetriNetUnfolderBase]: For 213881/213881 co-relation queries the response was YES. [2024-06-14 14:06:52,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23136 conditions, 3732 events. 2184/3732 cut-off events. For 213881/213881 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23818 event pairs, 447 based on Foata normal form. 1/3725 useless extension candidates. Maximal degree in co-relation 23005. Up to 3083 conditions per place. [2024-06-14 14:06:52,075 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 150 changer transitions 0/391 dead transitions. [2024-06-14 14:06:52,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 391 transitions, 5419 flow [2024-06-14 14:06:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 14:06:52,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 14:06:52,076 INFO L175 Difference]: Start difference. First operand has 273 places, 368 transitions, 4289 flow. Second operand 8 states and 188 transitions. [2024-06-14 14:06:52,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 391 transitions, 5419 flow [2024-06-14 14:06:52,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 391 transitions, 5275 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:52,692 INFO L231 Difference]: Finished difference. Result has 275 places, 371 transitions, 4489 flow [2024-06-14 14:06:52,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4489, PETRI_PLACES=275, PETRI_TRANSITIONS=371} [2024-06-14 14:06:52,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 14:06:52,693 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 371 transitions, 4489 flow [2024-06-14 14:06:52,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:52,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:52,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:52,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 14:06:52,694 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:52,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:52,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1455494786, now seen corresponding path program 7 times [2024-06-14 14:06:52,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:52,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251098833] [2024-06-14 14:06:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:52,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:52,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:52,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251098833] [2024-06-14 14:06:52,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251098833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:52,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:52,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647154829] [2024-06-14 14:06:52,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:52,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:52,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:52,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:52,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:52,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:52,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 371 transitions, 4489 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:52,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:52,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:52,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:53,481 INFO L124 PetriNetUnfolderBase]: 2181/3740 cut-off events. [2024-06-14 14:06:53,481 INFO L125 PetriNetUnfolderBase]: For 218588/218594 co-relation queries the response was YES. [2024-06-14 14:06:53,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23363 conditions, 3740 events. 2181/3740 cut-off events. For 218588/218594 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23987 event pairs, 443 based on Foata normal form. 5/3737 useless extension candidates. Maximal degree in co-relation 23231. Up to 3080 conditions per place. [2024-06-14 14:06:53,527 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 242 selfloop transitions, 137 changer transitions 0/386 dead transitions. [2024-06-14 14:06:53,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 386 transitions, 5423 flow [2024-06-14 14:06:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:06:53,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 14:06:53,528 INFO L175 Difference]: Start difference. First operand has 275 places, 371 transitions, 4489 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:06:53,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 386 transitions, 5423 flow [2024-06-14 14:06:54,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 386 transitions, 5188 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:54,338 INFO L231 Difference]: Finished difference. Result has 277 places, 371 transitions, 4534 flow [2024-06-14 14:06:54,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4534, PETRI_PLACES=277, PETRI_TRANSITIONS=371} [2024-06-14 14:06:54,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 14:06:54,339 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 371 transitions, 4534 flow [2024-06-14 14:06:54,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:54,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:54,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:54,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 14:06:54,340 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:54,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2074942792, now seen corresponding path program 8 times [2024-06-14 14:06:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:54,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851505875] [2024-06-14 14:06:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:54,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851505875] [2024-06-14 14:06:54,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851505875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:54,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:54,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933063541] [2024-06-14 14:06:54,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:54,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:54,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:54,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:54,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:54,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 371 transitions, 4534 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:54,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:54,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:54,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:55,187 INFO L124 PetriNetUnfolderBase]: 2186/3743 cut-off events. [2024-06-14 14:06:55,187 INFO L125 PetriNetUnfolderBase]: For 224411/224411 co-relation queries the response was YES. [2024-06-14 14:06:55,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23482 conditions, 3743 events. 2186/3743 cut-off events. For 224411/224411 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 23961 event pairs, 422 based on Foata normal form. 1/3737 useless extension candidates. Maximal degree in co-relation 23348. Up to 3244 conditions per place. [2024-06-14 14:06:55,230 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 78 changer transitions 0/389 dead transitions. [2024-06-14 14:06:55,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 389 transitions, 5387 flow [2024-06-14 14:06:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 14:06:55,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 14:06:55,231 INFO L175 Difference]: Start difference. First operand has 277 places, 371 transitions, 4534 flow. Second operand 8 states and 182 transitions. [2024-06-14 14:06:55,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 389 transitions, 5387 flow [2024-06-14 14:06:55,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 389 transitions, 4942 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:55,963 INFO L231 Difference]: Finished difference. Result has 278 places, 374 transitions, 4310 flow [2024-06-14 14:06:55,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4310, PETRI_PLACES=278, PETRI_TRANSITIONS=374} [2024-06-14 14:06:55,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 14:06:55,963 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 374 transitions, 4310 flow [2024-06-14 14:06:55,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:55,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:55,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 14:06:55,964 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:55,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1707344904, now seen corresponding path program 9 times [2024-06-14 14:06:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216584238] [2024-06-14 14:06:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:56,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:56,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216584238] [2024-06-14 14:06:56,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216584238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:56,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:56,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:56,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966781287] [2024-06-14 14:06:56,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:56,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:56,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:56,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:56,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:56,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 374 transitions, 4310 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:56,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:56,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:56,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:56,832 INFO L124 PetriNetUnfolderBase]: 2207/3790 cut-off events. [2024-06-14 14:06:56,832 INFO L125 PetriNetUnfolderBase]: For 234350/234356 co-relation queries the response was YES. [2024-06-14 14:06:56,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23619 conditions, 3790 events. 2207/3790 cut-off events. For 234350/234356 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24345 event pairs, 419 based on Foata normal form. 5/3790 useless extension candidates. Maximal degree in co-relation 23486. Up to 3143 conditions per place. [2024-06-14 14:06:56,873 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 154 changer transitions 0/411 dead transitions. [2024-06-14 14:06:56,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 411 transitions, 5759 flow [2024-06-14 14:06:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:56,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 14:06:56,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:06:56,875 INFO L175 Difference]: Start difference. First operand has 278 places, 374 transitions, 4310 flow. Second operand 9 states and 213 transitions. [2024-06-14 14:06:56,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 411 transitions, 5759 flow [2024-06-14 14:06:57,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 411 transitions, 5581 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:57,536 INFO L231 Difference]: Finished difference. Result has 281 places, 383 transitions, 4591 flow [2024-06-14 14:06:57,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4591, PETRI_PLACES=281, PETRI_TRANSITIONS=383} [2024-06-14 14:06:57,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-14 14:06:57,537 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 383 transitions, 4591 flow [2024-06-14 14:06:57,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:57,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:57,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 14:06:57,537 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:57,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:57,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2080038262, now seen corresponding path program 10 times [2024-06-14 14:06:57,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:57,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333090425] [2024-06-14 14:06:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:57,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:57,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:57,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333090425] [2024-06-14 14:06:57,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333090425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:57,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:57,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:57,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973583146] [2024-06-14 14:06:57,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:57,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:57,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:57,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 383 transitions, 4591 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:57,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:57,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:58,426 INFO L124 PetriNetUnfolderBase]: 2220/3801 cut-off events. [2024-06-14 14:06:58,426 INFO L125 PetriNetUnfolderBase]: For 243250/243250 co-relation queries the response was YES. [2024-06-14 14:06:58,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24120 conditions, 3801 events. 2220/3801 cut-off events. For 243250/243250 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24384 event pairs, 421 based on Foata normal form. 1/3795 useless extension candidates. Maximal degree in co-relation 23986. Up to 3284 conditions per place. [2024-06-14 14:06:58,469 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 85 changer transitions 0/408 dead transitions. [2024-06-14 14:06:58,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 408 transitions, 5689 flow [2024-06-14 14:06:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:06:58,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-14 14:06:58,470 INFO L175 Difference]: Start difference. First operand has 281 places, 383 transitions, 4591 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:06:58,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 408 transitions, 5689 flow [2024-06-14 14:06:59,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 408 transitions, 5301 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:59,448 INFO L231 Difference]: Finished difference. Result has 286 places, 389 transitions, 4507 flow [2024-06-14 14:06:59,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4223, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4507, PETRI_PLACES=286, PETRI_TRANSITIONS=389} [2024-06-14 14:06:59,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-14 14:06:59,449 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 389 transitions, 4507 flow [2024-06-14 14:06:59,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:59,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:59,449 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] [2024-06-14 14:06:59,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 14:06:59,449 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:59,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:59,449 INFO L85 PathProgramCache]: Analyzing trace with hash -965594772, now seen corresponding path program 11 times [2024-06-14 14:06:59,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:59,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598481525] [2024-06-14 14:06:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:59,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:59,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:59,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598481525] [2024-06-14 14:06:59,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598481525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:59,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:59,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107713871] [2024-06-14 14:06:59,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:59,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:59,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:59,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:59,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:59,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 389 transitions, 4507 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:59,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:59,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:59,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:00,350 INFO L124 PetriNetUnfolderBase]: 2217/3797 cut-off events. [2024-06-14 14:07:00,350 INFO L125 PetriNetUnfolderBase]: For 239467/239467 co-relation queries the response was YES. [2024-06-14 14:07:00,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23755 conditions, 3797 events. 2217/3797 cut-off events. For 239467/239467 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24400 event pairs, 421 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 23620. Up to 3281 conditions per place. [2024-06-14 14:07:00,392 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 85 changer transitions 0/409 dead transitions. [2024-06-14 14:07:00,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 409 transitions, 5357 flow [2024-06-14 14:07:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:07:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:07:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-14 14:07:00,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2024-06-14 14:07:00,393 INFO L175 Difference]: Start difference. First operand has 286 places, 389 transitions, 4507 flow. Second operand 13 states and 272 transitions. [2024-06-14 14:07:00,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 409 transitions, 5357 flow [2024-06-14 14:07:01,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 409 transitions, 5147 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:01,331 INFO L231 Difference]: Finished difference. Result has 291 places, 389 transitions, 4473 flow [2024-06-14 14:07:01,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4473, PETRI_PLACES=291, PETRI_TRANSITIONS=389} [2024-06-14 14:07:01,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-14 14:07:01,331 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 389 transitions, 4473 flow [2024-06-14 14:07:01,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:01,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:01,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:01,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 14:07:01,332 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:01,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1739592440, now seen corresponding path program 12 times [2024-06-14 14:07:01,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:01,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549813248] [2024-06-14 14:07:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:01,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:01,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:01,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549813248] [2024-06-14 14:07:01,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549813248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:01,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:01,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:01,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705827741] [2024-06-14 14:07:01,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:01,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:01,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:01,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:01,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:01,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 389 transitions, 4473 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:01,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:01,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:01,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:02,121 INFO L124 PetriNetUnfolderBase]: 2214/3798 cut-off events. [2024-06-14 14:07:02,121 INFO L125 PetriNetUnfolderBase]: For 243817/243823 co-relation queries the response was YES. [2024-06-14 14:07:02,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23710 conditions, 3798 events. 2214/3798 cut-off events. For 243817/243823 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24476 event pairs, 443 based on Foata normal form. 5/3795 useless extension candidates. Maximal degree in co-relation 23574. Up to 3152 conditions per place. [2024-06-14 14:07:02,164 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 139 changer transitions 0/407 dead transitions. [2024-06-14 14:07:02,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 407 transitions, 5613 flow [2024-06-14 14:07:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:07:02,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:07:02,165 INFO L175 Difference]: Start difference. First operand has 291 places, 389 transitions, 4473 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:07:02,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 407 transitions, 5613 flow [2024-06-14 14:07:03,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 407 transitions, 5433 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-14 14:07:03,121 INFO L231 Difference]: Finished difference. Result has 285 places, 389 transitions, 4578 flow [2024-06-14 14:07:03,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4578, PETRI_PLACES=285, PETRI_TRANSITIONS=389} [2024-06-14 14:07:03,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-14 14:07:03,122 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 389 transitions, 4578 flow [2024-06-14 14:07:03,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:03,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:03,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:03,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 14:07:03,123 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:03,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1231341504, now seen corresponding path program 13 times [2024-06-14 14:07:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:03,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440338964] [2024-06-14 14:07:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:03,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:03,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440338964] [2024-06-14 14:07:03,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440338964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:03,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:03,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:03,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135604368] [2024-06-14 14:07:03,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:03,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:03,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:03,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:03,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 389 transitions, 4578 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:03,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:03,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:03,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:04,030 INFO L124 PetriNetUnfolderBase]: 2211/3800 cut-off events. [2024-06-14 14:07:04,030 INFO L125 PetriNetUnfolderBase]: For 247155/247161 co-relation queries the response was YES. [2024-06-14 14:07:04,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23852 conditions, 3800 events. 2211/3800 cut-off events. For 247155/247161 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24511 event pairs, 419 based on Foata normal form. 5/3800 useless extension candidates. Maximal degree in co-relation 23715. Up to 3149 conditions per place. [2024-06-14 14:07:04,070 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 155 changer transitions 0/419 dead transitions. [2024-06-14 14:07:04,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 419 transitions, 5926 flow [2024-06-14 14:07:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:07:04,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-14 14:07:04,071 INFO L175 Difference]: Start difference. First operand has 285 places, 389 transitions, 4578 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:07:04,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 419 transitions, 5926 flow [2024-06-14 14:07:04,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 419 transitions, 5616 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:04,900 INFO L231 Difference]: Finished difference. Result has 289 places, 389 transitions, 4589 flow [2024-06-14 14:07:04,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4268, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4589, PETRI_PLACES=289, PETRI_TRANSITIONS=389} [2024-06-14 14:07:04,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-14 14:07:04,901 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 389 transitions, 4589 flow [2024-06-14 14:07:04,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:04,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:04,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:04,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 14:07:04,902 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:04,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:04,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1815232480, now seen corresponding path program 14 times [2024-06-14 14:07:04,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:04,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549909293] [2024-06-14 14:07:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:04,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:05,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:05,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549909293] [2024-06-14 14:07:05,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549909293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:05,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:05,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:05,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408099246] [2024-06-14 14:07:05,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:05,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:05,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:05,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:05,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:05,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 389 transitions, 4589 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:05,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:05,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:05,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:05,763 INFO L124 PetriNetUnfolderBase]: 2216/3797 cut-off events. [2024-06-14 14:07:05,763 INFO L125 PetriNetUnfolderBase]: For 252851/252851 co-relation queries the response was YES. [2024-06-14 14:07:05,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24017 conditions, 3797 events. 2216/3797 cut-off events. For 252851/252851 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24443 event pairs, 422 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 23879. Up to 3155 conditions per place. [2024-06-14 14:07:05,815 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 158 changer transitions 0/415 dead transitions. [2024-06-14 14:07:05,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 415 transitions, 5824 flow [2024-06-14 14:07:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:07:05,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 14:07:05,817 INFO L175 Difference]: Start difference. First operand has 289 places, 389 transitions, 4589 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:07:05,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 415 transitions, 5824 flow [2024-06-14 14:07:07,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 415 transitions, 5490 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:07,012 INFO L231 Difference]: Finished difference. Result has 289 places, 392 transitions, 4644 flow [2024-06-14 14:07:07,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4644, PETRI_PLACES=289, PETRI_TRANSITIONS=392} [2024-06-14 14:07:07,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-14 14:07:07,013 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 392 transitions, 4644 flow [2024-06-14 14:07:07,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:07,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:07,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:07,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 14:07:07,014 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:07,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:07,014 INFO L85 PathProgramCache]: Analyzing trace with hash -939411082, now seen corresponding path program 15 times [2024-06-14 14:07:07,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:07,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530670638] [2024-06-14 14:07:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:07,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:07,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530670638] [2024-06-14 14:07:07,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530670638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:07,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:07,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:07,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510750648] [2024-06-14 14:07:07,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:07,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:07,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:07,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 392 transitions, 4644 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:07,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:07,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:07,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:07,915 INFO L124 PetriNetUnfolderBase]: 2213/3805 cut-off events. [2024-06-14 14:07:07,915 INFO L125 PetriNetUnfolderBase]: For 250457/250463 co-relation queries the response was YES. [2024-06-14 14:07:07,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23923 conditions, 3805 events. 2213/3805 cut-off events. For 250457/250463 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24554 event pairs, 417 based on Foata normal form. 5/3805 useless extension candidates. Maximal degree in co-relation 23785. Up to 3152 conditions per place. [2024-06-14 14:07:07,962 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 163 changer transitions 0/419 dead transitions. [2024-06-14 14:07:07,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 419 transitions, 5686 flow [2024-06-14 14:07:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-14 14:07:07,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-06-14 14:07:07,963 INFO L175 Difference]: Start difference. First operand has 289 places, 392 transitions, 4644 flow. Second operand 10 states and 229 transitions. [2024-06-14 14:07:07,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 419 transitions, 5686 flow [2024-06-14 14:07:08,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 419 transitions, 5405 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:08,936 INFO L231 Difference]: Finished difference. Result has 294 places, 392 transitions, 4699 flow [2024-06-14 14:07:08,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4363, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4699, PETRI_PLACES=294, PETRI_TRANSITIONS=392} [2024-06-14 14:07:08,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 14:07:08,937 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 392 transitions, 4699 flow [2024-06-14 14:07:08,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:08,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:08,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:08,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 14:07:08,938 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:08,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:08,938 INFO L85 PathProgramCache]: Analyzing trace with hash -698183360, now seen corresponding path program 16 times [2024-06-14 14:07:08,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:08,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714483610] [2024-06-14 14:07:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:08,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:09,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:09,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714483610] [2024-06-14 14:07:09,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714483610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:09,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:09,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:09,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763792614] [2024-06-14 14:07:09,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:09,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:09,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:09,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:09,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 392 transitions, 4699 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:09,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:09,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:09,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:09,901 INFO L124 PetriNetUnfolderBase]: 2210/3790 cut-off events. [2024-06-14 14:07:09,901 INFO L125 PetriNetUnfolderBase]: For 253168/253168 co-relation queries the response was YES. [2024-06-14 14:07:09,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23914 conditions, 3790 events. 2210/3790 cut-off events. For 253168/253168 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24384 event pairs, 420 based on Foata normal form. 1/3784 useless extension candidates. Maximal degree in co-relation 23775. Up to 3149 conditions per place. [2024-06-14 14:07:09,950 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 161 changer transitions 0/418 dead transitions. [2024-06-14 14:07:09,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 418 transitions, 5891 flow [2024-06-14 14:07:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-14 14:07:09,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-14 14:07:09,951 INFO L175 Difference]: Start difference. First operand has 294 places, 392 transitions, 4699 flow. Second operand 11 states and 246 transitions. [2024-06-14 14:07:09,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 418 transitions, 5891 flow [2024-06-14 14:07:11,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 418 transitions, 5513 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:11,076 INFO L231 Difference]: Finished difference. Result has 296 places, 392 transitions, 4657 flow [2024-06-14 14:07:11,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4657, PETRI_PLACES=296, PETRI_TRANSITIONS=392} [2024-06-14 14:07:11,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-14 14:07:11,077 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 392 transitions, 4657 flow [2024-06-14 14:07:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:11,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:11,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 14:07:11,077 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:11,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1178603092, now seen corresponding path program 17 times [2024-06-14 14:07:11,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:11,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063537589] [2024-06-14 14:07:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:11,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:11,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:11,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063537589] [2024-06-14 14:07:11,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063537589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:11,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:11,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:11,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805549856] [2024-06-14 14:07:11,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:11,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:11,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:11,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:11,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:11,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:11,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 392 transitions, 4657 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:11,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:11,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:11,975 INFO L124 PetriNetUnfolderBase]: 2207/3786 cut-off events. [2024-06-14 14:07:11,975 INFO L125 PetriNetUnfolderBase]: For 249779/249779 co-relation queries the response was YES. [2024-06-14 14:07:12,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23768 conditions, 3786 events. 2207/3786 cut-off events. For 249779/249779 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24381 event pairs, 420 based on Foata normal form. 1/3780 useless extension candidates. Maximal degree in co-relation 23628. Up to 3146 conditions per place. [2024-06-14 14:07:12,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 161 changer transitions 0/419 dead transitions. [2024-06-14 14:07:12,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 419 transitions, 5699 flow [2024-06-14 14:07:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:07:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:07:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-14 14:07:12,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-14 14:07:12,020 INFO L175 Difference]: Start difference. First operand has 296 places, 392 transitions, 4657 flow. Second operand 13 states and 282 transitions. [2024-06-14 14:07:12,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 419 transitions, 5699 flow [2024-06-14 14:07:13,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 419 transitions, 5392 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:13,266 INFO L231 Difference]: Finished difference. Result has 302 places, 392 transitions, 4684 flow [2024-06-14 14:07:13,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4352, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4684, PETRI_PLACES=302, PETRI_TRANSITIONS=392} [2024-06-14 14:07:13,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-14 14:07:13,267 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 392 transitions, 4684 flow [2024-06-14 14:07:13,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:13,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:13,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:13,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 14:07:13,268 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:13,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:13,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2014267360, now seen corresponding path program 18 times [2024-06-14 14:07:13,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:13,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485415571] [2024-06-14 14:07:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:13,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:13,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:13,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485415571] [2024-06-14 14:07:13,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485415571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:13,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:13,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:13,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477124411] [2024-06-14 14:07:13,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:13,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:13,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:13,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:13,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 392 transitions, 4684 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:13,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:13,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:13,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:14,104 INFO L124 PetriNetUnfolderBase]: 2204/3791 cut-off events. [2024-06-14 14:07:14,105 INFO L125 PetriNetUnfolderBase]: For 246084/246084 co-relation queries the response was YES. [2024-06-14 14:07:14,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23674 conditions, 3791 events. 2204/3791 cut-off events. For 246084/246084 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24402 event pairs, 398 based on Foata normal form. 1/3789 useless extension candidates. Maximal degree in co-relation 23533. Up to 3288 conditions per place. [2024-06-14 14:07:14,150 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 350 selfloop transitions, 59 changer transitions 0/416 dead transitions. [2024-06-14 14:07:14,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 416 transitions, 5741 flow [2024-06-14 14:07:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 14:07:14,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:07:14,152 INFO L175 Difference]: Start difference. First operand has 302 places, 392 transitions, 4684 flow. Second operand 6 states and 156 transitions. [2024-06-14 14:07:14,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 416 transitions, 5741 flow [2024-06-14 14:07:15,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 416 transitions, 5369 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-14 14:07:15,060 INFO L231 Difference]: Finished difference. Result has 296 places, 393 transitions, 4505 flow [2024-06-14 14:07:15,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4505, PETRI_PLACES=296, PETRI_TRANSITIONS=393} [2024-06-14 14:07:15,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-14 14:07:15,061 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 393 transitions, 4505 flow [2024-06-14 14:07:15,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:15,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:15,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:15,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 14:07:15,061 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:15,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash -346395850, now seen corresponding path program 19 times [2024-06-14 14:07:15,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:15,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523987505] [2024-06-14 14:07:15,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:15,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523987505] [2024-06-14 14:07:15,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523987505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:15,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:15,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122776142] [2024-06-14 14:07:15,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:15,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:15,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:15,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:15,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 393 transitions, 4505 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:15,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:15,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:15,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:15,902 INFO L124 PetriNetUnfolderBase]: 2201/3787 cut-off events. [2024-06-14 14:07:15,902 INFO L125 PetriNetUnfolderBase]: For 242669/242669 co-relation queries the response was YES. [2024-06-14 14:07:15,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23390 conditions, 3787 events. 2201/3787 cut-off events. For 242669/242669 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24382 event pairs, 398 based on Foata normal form. 1/3785 useless extension candidates. Maximal degree in co-relation 23248. Up to 3285 conditions per place. [2024-06-14 14:07:15,950 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 352 selfloop transitions, 56 changer transitions 0/415 dead transitions. [2024-06-14 14:07:15,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 415 transitions, 5377 flow [2024-06-14 14:07:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:15,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 14:07:15,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-14 14:07:15,952 INFO L175 Difference]: Start difference. First operand has 296 places, 393 transitions, 4505 flow. Second operand 6 states and 154 transitions. [2024-06-14 14:07:15,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 415 transitions, 5377 flow [2024-06-14 14:07:16,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 415 transitions, 5157 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:16,836 INFO L231 Difference]: Finished difference. Result has 296 places, 393 transitions, 4411 flow [2024-06-14 14:07:16,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4285, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4411, PETRI_PLACES=296, PETRI_TRANSITIONS=393} [2024-06-14 14:07:16,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-14 14:07:16,837 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 393 transitions, 4411 flow [2024-06-14 14:07:16,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:16,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:16,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:16,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 14:07:16,837 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:16,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1106909654, now seen corresponding path program 1 times [2024-06-14 14:07:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:16,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774301302] [2024-06-14 14:07:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:16,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:17,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774301302] [2024-06-14 14:07:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774301302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:17,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:17,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:17,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966251697] [2024-06-14 14:07:17,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:17,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:17,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:17,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:17,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 393 transitions, 4411 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:17,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:17,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:17,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:17,762 INFO L124 PetriNetUnfolderBase]: 2320/3971 cut-off events. [2024-06-14 14:07:17,762 INFO L125 PetriNetUnfolderBase]: For 321467/321467 co-relation queries the response was YES. [2024-06-14 14:07:17,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25682 conditions, 3971 events. 2320/3971 cut-off events. For 321467/321467 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25710 event pairs, 443 based on Foata normal form. 12/3975 useless extension candidates. Maximal degree in co-relation 25539. Up to 2982 conditions per place. [2024-06-14 14:07:17,806 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 185 changer transitions 0/427 dead transitions. [2024-06-14 14:07:17,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 427 transitions, 5599 flow [2024-06-14 14:07:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:07:17,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:07:17,808 INFO L175 Difference]: Start difference. First operand has 296 places, 393 transitions, 4411 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:07:17,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 427 transitions, 5599 flow [2024-06-14 14:07:18,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 427 transitions, 5385 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:18,875 INFO L231 Difference]: Finished difference. Result has 297 places, 397 transitions, 4676 flow [2024-06-14 14:07:18,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=297, PETRI_TRANSITIONS=397} [2024-06-14 14:07:18,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-14 14:07:18,876 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 397 transitions, 4676 flow [2024-06-14 14:07:18,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:18,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:18,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:18,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 14:07:18,876 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:18,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1018196024, now seen corresponding path program 2 times [2024-06-14 14:07:18,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:18,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72679383] [2024-06-14 14:07:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:19,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:19,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72679383] [2024-06-14 14:07:19,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72679383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:19,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:19,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:19,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456322812] [2024-06-14 14:07:19,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:19,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:19,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:19,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:19,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 397 transitions, 4676 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:19,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:19,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:19,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:19,807 INFO L124 PetriNetUnfolderBase]: 2376/4062 cut-off events. [2024-06-14 14:07:19,807 INFO L125 PetriNetUnfolderBase]: For 345766/345766 co-relation queries the response was YES. [2024-06-14 14:07:19,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26830 conditions, 4062 events. 2376/4062 cut-off events. For 345766/345766 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 26359 event pairs, 506 based on Foata normal form. 16/4070 useless extension candidates. Maximal degree in co-relation 26687. Up to 3316 conditions per place. [2024-06-14 14:07:19,861 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 173 changer transitions 0/421 dead transitions. [2024-06-14 14:07:19,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 421 transitions, 5626 flow [2024-06-14 14:07:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:07:19,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:07:19,862 INFO L175 Difference]: Start difference. First operand has 297 places, 397 transitions, 4676 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:07:19,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 421 transitions, 5626 flow [2024-06-14 14:07:20,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 421 transitions, 5369 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:20,757 INFO L231 Difference]: Finished difference. Result has 301 places, 399 transitions, 4829 flow [2024-06-14 14:07:20,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4829, PETRI_PLACES=301, PETRI_TRANSITIONS=399} [2024-06-14 14:07:20,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-14 14:07:20,757 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 399 transitions, 4829 flow [2024-06-14 14:07:20,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:20,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:20,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:20,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 14:07:20,758 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:20,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash -250154076, now seen corresponding path program 3 times [2024-06-14 14:07:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:20,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742114436] [2024-06-14 14:07:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:20,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:20,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742114436] [2024-06-14 14:07:20,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742114436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:20,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:20,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:20,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317506495] [2024-06-14 14:07:20,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:20,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:20,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:21,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:21,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 399 transitions, 4829 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:21,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:21,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:21,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:21,674 INFO L124 PetriNetUnfolderBase]: 2416/4126 cut-off events. [2024-06-14 14:07:21,675 INFO L125 PetriNetUnfolderBase]: For 340893/340893 co-relation queries the response was YES. [2024-06-14 14:07:21,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27490 conditions, 4126 events. 2416/4126 cut-off events. For 340893/340893 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26851 event pairs, 502 based on Foata normal form. 12/4130 useless extension candidates. Maximal degree in co-relation 27345. Up to 3320 conditions per place. [2024-06-14 14:07:21,725 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 177 changer transitions 0/426 dead transitions. [2024-06-14 14:07:21,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 426 transitions, 5801 flow [2024-06-14 14:07:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 14:07:21,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:07:21,726 INFO L175 Difference]: Start difference. First operand has 301 places, 399 transitions, 4829 flow. Second operand 8 states and 192 transitions. [2024-06-14 14:07:21,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 426 transitions, 5801 flow [2024-06-14 14:07:22,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 426 transitions, 5433 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:22,925 INFO L231 Difference]: Finished difference. Result has 303 places, 401 transitions, 4876 flow [2024-06-14 14:07:22,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4876, PETRI_PLACES=303, PETRI_TRANSITIONS=401} [2024-06-14 14:07:22,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 14:07:22,926 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 401 transitions, 4876 flow [2024-06-14 14:07:22,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:22,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:22,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:22,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 14:07:22,926 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:22,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash -970947232, now seen corresponding path program 4 times [2024-06-14 14:07:22,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:22,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061008373] [2024-06-14 14:07:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:22,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:23,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061008373] [2024-06-14 14:07:23,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061008373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:23,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:23,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925345573] [2024-06-14 14:07:23,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:23,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:23,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:23,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:23,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 401 transitions, 4876 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:23,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:23,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:23,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:23,870 INFO L124 PetriNetUnfolderBase]: 2472/4230 cut-off events. [2024-06-14 14:07:23,870 INFO L125 PetriNetUnfolderBase]: For 363179/363179 co-relation queries the response was YES. [2024-06-14 14:07:23,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28160 conditions, 4230 events. 2472/4230 cut-off events. For 363179/363179 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27720 event pairs, 493 based on Foata normal form. 16/4239 useless extension candidates. Maximal degree in co-relation 28014. Up to 3630 conditions per place. [2024-06-14 14:07:23,926 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 78 changer transitions 0/422 dead transitions. [2024-06-14 14:07:23,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 422 transitions, 5822 flow [2024-06-14 14:07:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 14:07:23,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-14 14:07:23,927 INFO L175 Difference]: Start difference. First operand has 303 places, 401 transitions, 4876 flow. Second operand 8 states and 185 transitions. [2024-06-14 14:07:23,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 422 transitions, 5822 flow [2024-06-14 14:07:25,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 422 transitions, 5435 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:25,375 INFO L231 Difference]: Finished difference. Result has 305 places, 403 transitions, 4711 flow [2024-06-14 14:07:25,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4711, PETRI_PLACES=305, PETRI_TRANSITIONS=403} [2024-06-14 14:07:25,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-14 14:07:25,375 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 403 transitions, 4711 flow [2024-06-14 14:07:25,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:25,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:25,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 14:07:25,376 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:25,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:25,377 INFO L85 PathProgramCache]: Analyzing trace with hash -971095102, now seen corresponding path program 5 times [2024-06-14 14:07:25,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:25,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832528144] [2024-06-14 14:07:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:25,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:25,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:25,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832528144] [2024-06-14 14:07:25,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832528144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:25,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:25,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:25,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564187682] [2024-06-14 14:07:25,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:25,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:25,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:25,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:25,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 403 transitions, 4711 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:25,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:25,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:26,419 INFO L124 PetriNetUnfolderBase]: 2604/4434 cut-off events. [2024-06-14 14:07:26,420 INFO L125 PetriNetUnfolderBase]: For 415377/415377 co-relation queries the response was YES. [2024-06-14 14:07:26,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30693 conditions, 4434 events. 2604/4434 cut-off events. For 415377/415377 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29124 event pairs, 513 based on Foata normal form. 12/4439 useless extension candidates. Maximal degree in co-relation 30546. Up to 3674 conditions per place. [2024-06-14 14:07:26,479 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 84 changer transitions 0/430 dead transitions. [2024-06-14 14:07:26,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 430 transitions, 5915 flow [2024-06-14 14:07:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 14:07:26,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 14:07:26,481 INFO L175 Difference]: Start difference. First operand has 305 places, 403 transitions, 4711 flow. Second operand 8 states and 188 transitions. [2024-06-14 14:07:26,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 430 transitions, 5915 flow [2024-06-14 14:07:27,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 430 transitions, 5729 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:27,748 INFO L231 Difference]: Finished difference. Result has 307 places, 407 transitions, 4822 flow [2024-06-14 14:07:27,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4525, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4822, PETRI_PLACES=307, PETRI_TRANSITIONS=407} [2024-06-14 14:07:27,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-14 14:07:27,748 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 407 transitions, 4822 flow [2024-06-14 14:07:27,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:27,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:27,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:27,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 14:07:27,749 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:27,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash -965584852, now seen corresponding path program 6 times [2024-06-14 14:07:27,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:27,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276944654] [2024-06-14 14:07:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:27,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:27,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276944654] [2024-06-14 14:07:27,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276944654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:27,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:27,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585837962] [2024-06-14 14:07:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:27,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:27,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:28,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:28,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 407 transitions, 4822 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:28,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:28,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:28,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:28,867 INFO L124 PetriNetUnfolderBase]: 2568/4382 cut-off events. [2024-06-14 14:07:28,868 INFO L125 PetriNetUnfolderBase]: For 383203/383203 co-relation queries the response was YES. [2024-06-14 14:07:28,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29003 conditions, 4382 events. 2568/4382 cut-off events. For 383203/383203 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28780 event pairs, 509 based on Foata normal form. 16/4391 useless extension candidates. Maximal degree in co-relation 28855. Up to 3782 conditions per place. [2024-06-14 14:07:28,929 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 79 changer transitions 0/428 dead transitions. [2024-06-14 14:07:28,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 428 transitions, 5728 flow [2024-06-14 14:07:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 14:07:28,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261904761904762 [2024-06-14 14:07:28,930 INFO L175 Difference]: Start difference. First operand has 307 places, 407 transitions, 4822 flow. Second operand 10 states and 221 transitions. [2024-06-14 14:07:28,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 428 transitions, 5728 flow [2024-06-14 14:07:30,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 428 transitions, 5561 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:30,343 INFO L231 Difference]: Finished difference. Result has 313 places, 407 transitions, 4819 flow [2024-06-14 14:07:30,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4655, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4819, PETRI_PLACES=313, PETRI_TRANSITIONS=407} [2024-06-14 14:07:30,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-14 14:07:30,343 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 407 transitions, 4819 flow [2024-06-14 14:07:30,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:30,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:30,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:30,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 14:07:30,344 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:30,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -965369650, now seen corresponding path program 1 times [2024-06-14 14:07:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:30,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881690326] [2024-06-14 14:07:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:30,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:30,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881690326] [2024-06-14 14:07:30,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881690326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:30,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:30,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:30,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806034205] [2024-06-14 14:07:30,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:30,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:30,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:30,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:30,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:30,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 407 transitions, 4819 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:30,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:30,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:30,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:31,406 INFO L124 PetriNetUnfolderBase]: 2608/4454 cut-off events. [2024-06-14 14:07:31,406 INFO L125 PetriNetUnfolderBase]: For 374214/374214 co-relation queries the response was YES. [2024-06-14 14:07:31,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29305 conditions, 4454 events. 2608/4454 cut-off events. For 374214/374214 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29365 event pairs, 511 based on Foata normal form. 12/4459 useless extension candidates. Maximal degree in co-relation 29155. Up to 3722 conditions per place. [2024-06-14 14:07:31,465 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 86 changer transitions 0/433 dead transitions. [2024-06-14 14:07:31,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 433 transitions, 5803 flow [2024-06-14 14:07:31,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 14:07:31,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-14 14:07:31,468 INFO L175 Difference]: Start difference. First operand has 313 places, 407 transitions, 4819 flow. Second operand 10 states and 223 transitions. [2024-06-14 14:07:31,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 433 transitions, 5803 flow [2024-06-14 14:07:32,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 433 transitions, 5629 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:32,813 INFO L231 Difference]: Finished difference. Result has 314 places, 409 transitions, 4880 flow [2024-06-14 14:07:32,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4880, PETRI_PLACES=314, PETRI_TRANSITIONS=409} [2024-06-14 14:07:32,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-14 14:07:32,814 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 409 transitions, 4880 flow [2024-06-14 14:07:32,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:32,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:32,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:32,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 14:07:32,814 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:32,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash -346385930, now seen corresponding path program 7 times [2024-06-14 14:07:32,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:32,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444326047] [2024-06-14 14:07:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:32,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:33,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:33,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444326047] [2024-06-14 14:07:33,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444326047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:33,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:33,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:33,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119721931] [2024-06-14 14:07:33,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:33,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:33,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:33,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:33,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:33,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 409 transitions, 4880 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:33,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:33,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:33,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:33,886 INFO L124 PetriNetUnfolderBase]: 2672/4571 cut-off events. [2024-06-14 14:07:33,886 INFO L125 PetriNetUnfolderBase]: For 399350/399350 co-relation queries the response was YES. [2024-06-14 14:07:33,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30262 conditions, 4571 events. 2672/4571 cut-off events. For 399350/399350 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30284 event pairs, 452 based on Foata normal form. 16/4584 useless extension candidates. Maximal degree in co-relation 30111. Up to 3914 conditions per place. [2024-06-14 14:07:33,945 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 369 selfloop transitions, 67 changer transitions 0/443 dead transitions. [2024-06-14 14:07:33,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 443 transitions, 5924 flow [2024-06-14 14:07:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:07:33,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-14 14:07:33,946 INFO L175 Difference]: Start difference. First operand has 314 places, 409 transitions, 4880 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:07:33,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 443 transitions, 5924 flow [2024-06-14 14:07:35,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 443 transitions, 5715 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:35,338 INFO L231 Difference]: Finished difference. Result has 313 places, 413 transitions, 4909 flow [2024-06-14 14:07:35,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4909, PETRI_PLACES=313, PETRI_TRANSITIONS=413} [2024-06-14 14:07:35,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-14 14:07:35,338 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 413 transitions, 4909 flow [2024-06-14 14:07:35,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:35,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:35,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:35,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 14:07:35,339 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:35,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1178613012, now seen corresponding path program 8 times [2024-06-14 14:07:35,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:35,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958132067] [2024-06-14 14:07:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:35,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:35,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958132067] [2024-06-14 14:07:35,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958132067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:35,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:35,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:35,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89183945] [2024-06-14 14:07:35,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:35,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:35,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:35,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:35,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 413 transitions, 4909 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:35,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:35,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:35,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:36,395 INFO L124 PetriNetUnfolderBase]: 2728/4642 cut-off events. [2024-06-14 14:07:36,395 INFO L125 PetriNetUnfolderBase]: For 412348/412348 co-relation queries the response was YES. [2024-06-14 14:07:36,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30934 conditions, 4642 events. 2728/4642 cut-off events. For 412348/412348 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30802 event pairs, 539 based on Foata normal form. 16/4651 useless extension candidates. Maximal degree in co-relation 30782. Up to 3841 conditions per place. [2024-06-14 14:07:36,456 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 166 changer transitions 0/442 dead transitions. [2024-06-14 14:07:36,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 442 transitions, 5927 flow [2024-06-14 14:07:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-14 14:07:36,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:07:36,457 INFO L175 Difference]: Start difference. First operand has 313 places, 413 transitions, 4909 flow. Second operand 10 states and 230 transitions. [2024-06-14 14:07:36,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 442 transitions, 5927 flow [2024-06-14 14:07:37,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 442 transitions, 5783 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:37,860 INFO L231 Difference]: Finished difference. Result has 319 places, 415 transitions, 5179 flow [2024-06-14 14:07:37,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5179, PETRI_PLACES=319, PETRI_TRANSITIONS=415} [2024-06-14 14:07:37,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-14 14:07:37,860 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 415 transitions, 5179 flow [2024-06-14 14:07:37,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:37,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:37,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:37,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 14:07:37,861 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:37,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1173106482, now seen corresponding path program 9 times [2024-06-14 14:07:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:37,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670184664] [2024-06-14 14:07:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:37,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:38,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:38,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670184664] [2024-06-14 14:07:38,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670184664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:38,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:38,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:38,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640258548] [2024-06-14 14:07:38,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:38,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:38,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:38,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:38,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:38,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 415 transitions, 5179 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:38,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:38,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:38,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:38,884 INFO L124 PetriNetUnfolderBase]: 2771/4715 cut-off events. [2024-06-14 14:07:38,884 INFO L125 PetriNetUnfolderBase]: For 416005/416005 co-relation queries the response was YES. [2024-06-14 14:07:38,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31579 conditions, 4715 events. 2771/4715 cut-off events. For 416005/416005 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31352 event pairs, 548 based on Foata normal form. 16/4724 useless extension candidates. Maximal degree in co-relation 31426. Up to 3910 conditions per place. [2024-06-14 14:07:38,947 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 272 selfloop transitions, 163 changer transitions 0/442 dead transitions. [2024-06-14 14:07:38,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 442 transitions, 6197 flow [2024-06-14 14:07:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 14:07:38,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:07:38,948 INFO L175 Difference]: Start difference. First operand has 319 places, 415 transitions, 5179 flow. Second operand 8 states and 192 transitions. [2024-06-14 14:07:38,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 442 transitions, 6197 flow [2024-06-14 14:07:40,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 442 transitions, 5825 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:40,541 INFO L231 Difference]: Finished difference. Result has 318 places, 417 transitions, 5219 flow [2024-06-14 14:07:40,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4807, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5219, PETRI_PLACES=318, PETRI_TRANSITIONS=417} [2024-06-14 14:07:40,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-14 14:07:40,542 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 417 transitions, 5219 flow [2024-06-14 14:07:40,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:40,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:40,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:40,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 14:07:40,542 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:40,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:40,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1815094530, now seen corresponding path program 10 times [2024-06-14 14:07:40,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:40,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445609094] [2024-06-14 14:07:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:40,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:40,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:40,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445609094] [2024-06-14 14:07:40,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445609094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:40,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:40,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:40,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729599219] [2024-06-14 14:07:40,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:40,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:40,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:40,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:40,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:40,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:40,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 417 transitions, 5219 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:40,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:40,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:40,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:41,614 INFO L124 PetriNetUnfolderBase]: 2778/4737 cut-off events. [2024-06-14 14:07:41,615 INFO L125 PetriNetUnfolderBase]: For 378885/378885 co-relation queries the response was YES. [2024-06-14 14:07:41,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30994 conditions, 4737 events. 2778/4737 cut-off events. For 378885/378885 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31583 event pairs, 470 based on Foata normal form. 12/4742 useless extension candidates. Maximal degree in co-relation 30841. Up to 3511 conditions per place. [2024-06-14 14:07:41,680 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 182 changer transitions 0/450 dead transitions. [2024-06-14 14:07:41,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 450 transitions, 6419 flow [2024-06-14 14:07:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:07:41,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-14 14:07:41,681 INFO L175 Difference]: Start difference. First operand has 318 places, 417 transitions, 5219 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:07:41,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 450 transitions, 6419 flow [2024-06-14 14:07:43,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 450 transitions, 6049 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:43,251 INFO L231 Difference]: Finished difference. Result has 320 places, 418 transitions, 5266 flow [2024-06-14 14:07:43,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5266, PETRI_PLACES=320, PETRI_TRANSITIONS=418} [2024-06-14 14:07:43,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-14 14:07:43,252 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 418 transitions, 5266 flow [2024-06-14 14:07:43,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:43,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:43,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 14:07:43,252 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:43,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:43,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1820819982, now seen corresponding path program 2 times [2024-06-14 14:07:43,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:43,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266459017] [2024-06-14 14:07:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:43,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:43,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:43,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266459017] [2024-06-14 14:07:43,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266459017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:43,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:43,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:43,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771037256] [2024-06-14 14:07:43,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:43,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:43,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:43,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:43,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:43,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:43,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 418 transitions, 5266 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:43,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:43,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:44,338 INFO L124 PetriNetUnfolderBase]: 2818/4804 cut-off events. [2024-06-14 14:07:44,338 INFO L125 PetriNetUnfolderBase]: For 377861/377861 co-relation queries the response was YES. [2024-06-14 14:07:44,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31388 conditions, 4804 events. 2818/4804 cut-off events. For 377861/377861 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32032 event pairs, 535 based on Foata normal form. 12/4809 useless extension candidates. Maximal degree in co-relation 31234. Up to 3739 conditions per place. [2024-06-14 14:07:44,401 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 180 changer transitions 0/450 dead transitions. [2024-06-14 14:07:44,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 450 transitions, 6304 flow [2024-06-14 14:07:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-14 14:07:44,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-14 14:07:44,402 INFO L175 Difference]: Start difference. First operand has 320 places, 418 transitions, 5266 flow. Second operand 10 states and 232 transitions. [2024-06-14 14:07:44,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 450 transitions, 6304 flow [2024-06-14 14:07:46,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 450 transitions, 5872 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:46,239 INFO L231 Difference]: Finished difference. Result has 322 places, 420 transitions, 5264 flow [2024-06-14 14:07:46,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5264, PETRI_PLACES=322, PETRI_TRANSITIONS=420} [2024-06-14 14:07:46,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-14 14:07:46,239 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 420 transitions, 5264 flow [2024-06-14 14:07:46,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:46,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:46,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:46,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 14:07:46,240 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:46,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -89670218, now seen corresponding path program 3 times [2024-06-14 14:07:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:46,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396313396] [2024-06-14 14:07:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:46,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:46,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:46,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396313396] [2024-06-14 14:07:46,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396313396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:46,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:46,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:46,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776422253] [2024-06-14 14:07:46,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:46,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:46,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:46,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:46,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:46,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 420 transitions, 5264 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:46,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:46,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:46,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:47,349 INFO L124 PetriNetUnfolderBase]: 2858/4889 cut-off events. [2024-06-14 14:07:47,349 INFO L125 PetriNetUnfolderBase]: For 375465/375465 co-relation queries the response was YES. [2024-06-14 14:07:47,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31554 conditions, 4889 events. 2858/4889 cut-off events. For 375465/375465 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32773 event pairs, 476 based on Foata normal form. 12/4898 useless extension candidates. Maximal degree in co-relation 31401. Up to 4152 conditions per place. [2024-06-14 14:07:47,411 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 69 changer transitions 0/452 dead transitions. [2024-06-14 14:07:47,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 452 transitions, 6312 flow [2024-06-14 14:07:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:07:47,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 14:07:47,412 INFO L175 Difference]: Start difference. First operand has 322 places, 420 transitions, 5264 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:07:47,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 452 transitions, 6312 flow [2024-06-14 14:07:48,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 452 transitions, 5908 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:48,753 INFO L231 Difference]: Finished difference. Result has 321 places, 422 transitions, 5069 flow [2024-06-14 14:07:48,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4864, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5069, PETRI_PLACES=321, PETRI_TRANSITIONS=422} [2024-06-14 14:07:48,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-14 14:07:48,753 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 422 transitions, 5069 flow [2024-06-14 14:07:48,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:48,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:48,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:48,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 14:07:48,754 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-14 14:07:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099144244] [2024-06-14 14:07:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:48,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:48,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099144244] [2024-06-14 14:07:48,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099144244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:48,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:48,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:48,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48936653] [2024-06-14 14:07:48,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:48,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:49,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:49,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 422 transitions, 5069 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:49,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:49,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:49,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:49,862 INFO L124 PetriNetUnfolderBase]: 2924/5001 cut-off events. [2024-06-14 14:07:49,862 INFO L125 PetriNetUnfolderBase]: For 392248/392248 co-relation queries the response was YES. [2024-06-14 14:07:49,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32280 conditions, 5001 events. 2924/5001 cut-off events. For 392248/392248 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33667 event pairs, 457 based on Foata normal form. 12/5010 useless extension candidates. Maximal degree in co-relation 32126. Up to 3972 conditions per place. [2024-06-14 14:07:49,925 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 72 changer transitions 0/454 dead transitions. [2024-06-14 14:07:49,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 454 transitions, 6315 flow [2024-06-14 14:07:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:07:49,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 14:07:49,926 INFO L175 Difference]: Start difference. First operand has 321 places, 422 transitions, 5069 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:07:49,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 454 transitions, 6315 flow [2024-06-14 14:07:51,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 454 transitions, 6136 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:51,189 INFO L231 Difference]: Finished difference. Result has 324 places, 425 transitions, 5168 flow [2024-06-14 14:07:51,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4890, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5168, PETRI_PLACES=324, PETRI_TRANSITIONS=425} [2024-06-14 14:07:51,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-14 14:07:51,190 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 425 transitions, 5168 flow [2024-06-14 14:07:51,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:51,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:51,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 14:07:51,190 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:51,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:51,191 INFO L85 PathProgramCache]: Analyzing trace with hash -163199762, now seen corresponding path program 1 times [2024-06-14 14:07:51,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:51,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827928030] [2024-06-14 14:07:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:51,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:51,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827928030] [2024-06-14 14:07:51,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827928030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:51,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:51,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:51,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19248895] [2024-06-14 14:07:51,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:51,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:51,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:51,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:51,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 425 transitions, 5168 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:51,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:51,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:52,344 INFO L124 PetriNetUnfolderBase]: 2945/5027 cut-off events. [2024-06-14 14:07:52,345 INFO L125 PetriNetUnfolderBase]: For 367529/367535 co-relation queries the response was YES. [2024-06-14 14:07:52,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32786 conditions, 5027 events. 2945/5027 cut-off events. For 367529/367535 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33880 event pairs, 587 based on Foata normal form. 1/5021 useless extension candidates. Maximal degree in co-relation 32630. Up to 4244 conditions per place. [2024-06-14 14:07:52,410 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 114 changer transitions 0/474 dead transitions. [2024-06-14 14:07:52,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 474 transitions, 6860 flow [2024-06-14 14:07:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-14 14:07:52,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-14 14:07:52,412 INFO L175 Difference]: Start difference. First operand has 324 places, 425 transitions, 5168 flow. Second operand 9 states and 223 transitions. [2024-06-14 14:07:52,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 474 transitions, 6860 flow [2024-06-14 14:07:53,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 474 transitions, 6732 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:53,966 INFO L231 Difference]: Finished difference. Result has 329 places, 437 transitions, 5424 flow [2024-06-14 14:07:53,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5040, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5424, PETRI_PLACES=329, PETRI_TRANSITIONS=437} [2024-06-14 14:07:53,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-14 14:07:53,966 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 437 transitions, 5424 flow [2024-06-14 14:07:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:53,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:53,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:53,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 14:07:53,967 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:53,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:53,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1040982994, now seen corresponding path program 2 times [2024-06-14 14:07:53,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:53,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590516235] [2024-06-14 14:07:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:53,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:54,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:54,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590516235] [2024-06-14 14:07:54,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590516235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:54,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:54,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:54,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485151426] [2024-06-14 14:07:54,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:54,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:54,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:54,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 437 transitions, 5424 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:54,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:54,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:54,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:55,161 INFO L124 PetriNetUnfolderBase]: 2955/5045 cut-off events. [2024-06-14 14:07:55,161 INFO L125 PetriNetUnfolderBase]: For 374209/374215 co-relation queries the response was YES. [2024-06-14 14:07:55,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33357 conditions, 5045 events. 2955/5045 cut-off events. For 374209/374215 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 34046 event pairs, 572 based on Foata normal form. 5/5045 useless extension candidates. Maximal degree in co-relation 33200. Up to 4442 conditions per place. [2024-06-14 14:07:55,237 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 64 changer transitions 0/474 dead transitions. [2024-06-14 14:07:55,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 474 transitions, 6517 flow [2024-06-14 14:07:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 14:07:55,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-14 14:07:55,238 INFO L175 Difference]: Start difference. First operand has 329 places, 437 transitions, 5424 flow. Second operand 9 states and 212 transitions. [2024-06-14 14:07:55,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 474 transitions, 6517 flow [2024-06-14 14:07:56,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 474 transitions, 6317 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:56,909 INFO L231 Difference]: Finished difference. Result has 335 places, 443 transitions, 5445 flow [2024-06-14 14:07:56,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5249, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5445, PETRI_PLACES=335, PETRI_TRANSITIONS=443} [2024-06-14 14:07:56,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-14 14:07:56,910 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 443 transitions, 5445 flow [2024-06-14 14:07:56,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:56,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:56,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:56,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 14:07:56,910 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:56,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash -163079606, now seen corresponding path program 1 times [2024-06-14 14:07:56,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:56,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087614146] [2024-06-14 14:07:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:56,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:57,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:57,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087614146] [2024-06-14 14:07:57,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087614146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:57,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:57,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:57,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196109997] [2024-06-14 14:07:57,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:57,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:57,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:57,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:57,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:57,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:57,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 443 transitions, 5445 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:57,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:57,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:57,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:58,085 INFO L124 PetriNetUnfolderBase]: 2976/5078 cut-off events. [2024-06-14 14:07:58,085 INFO L125 PetriNetUnfolderBase]: For 381722/381728 co-relation queries the response was YES. [2024-06-14 14:07:58,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33756 conditions, 5078 events. 2976/5078 cut-off events. For 381722/381728 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34278 event pairs, 580 based on Foata normal form. 5/5078 useless extension candidates. Maximal degree in co-relation 33597. Up to 4340 conditions per place. [2024-06-14 14:07:58,155 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 350 selfloop transitions, 129 changer transitions 0/486 dead transitions. [2024-06-14 14:07:58,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 486 transitions, 7111 flow [2024-06-14 14:07:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 14:07:58,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-14 14:07:58,157 INFO L175 Difference]: Start difference. First operand has 335 places, 443 transitions, 5445 flow. Second operand 9 states and 220 transitions. [2024-06-14 14:07:58,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 486 transitions, 7111 flow [2024-06-14 14:07:59,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 486 transitions, 6975 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:59,794 INFO L231 Difference]: Finished difference. Result has 338 places, 452 transitions, 5669 flow [2024-06-14 14:07:59,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5669, PETRI_PLACES=338, PETRI_TRANSITIONS=452} [2024-06-14 14:07:59,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-14 14:07:59,794 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 452 transitions, 5669 flow [2024-06-14 14:07:59,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:59,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:59,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:59,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 14:07:59,795 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:59,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:59,795 INFO L85 PathProgramCache]: Analyzing trace with hash -275307424, now seen corresponding path program 2 times [2024-06-14 14:07:59,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:59,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345070148] [2024-06-14 14:07:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:59,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:00,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:00,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345070148] [2024-06-14 14:08:00,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345070148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:00,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:00,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:00,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331974152] [2024-06-14 14:08:00,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:00,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:00,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:00,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:00,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:00,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:00,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 452 transitions, 5669 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:00,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:00,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:00,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:00,994 INFO L124 PetriNetUnfolderBase]: 2994/5103 cut-off events. [2024-06-14 14:08:00,994 INFO L125 PetriNetUnfolderBase]: For 394068/394074 co-relation queries the response was YES. [2024-06-14 14:08:01,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34282 conditions, 5103 events. 2994/5103 cut-off events. For 394068/394074 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34430 event pairs, 580 based on Foata normal form. 5/5103 useless extension candidates. Maximal degree in co-relation 34122. Up to 4359 conditions per place. [2024-06-14 14:08:01,057 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 138 changer transitions 0/498 dead transitions. [2024-06-14 14:08:01,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 498 transitions, 7569 flow [2024-06-14 14:08:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-14 14:08:01,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-14 14:08:01,059 INFO L175 Difference]: Start difference. First operand has 338 places, 452 transitions, 5669 flow. Second operand 11 states and 261 transitions. [2024-06-14 14:08:01,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 498 transitions, 7569 flow [2024-06-14 14:08:03,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 498 transitions, 7271 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:03,018 INFO L231 Difference]: Finished difference. Result has 344 places, 461 transitions, 5779 flow [2024-06-14 14:08:03,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5387, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5779, PETRI_PLACES=344, PETRI_TRANSITIONS=461} [2024-06-14 14:08:03,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-14 14:08:03,018 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 461 transitions, 5779 flow [2024-06-14 14:08:03,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:03,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:03,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:03,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 14:08:03,019 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:03,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:03,019 INFO L85 PathProgramCache]: Analyzing trace with hash -447790804, now seen corresponding path program 3 times [2024-06-14 14:08:03,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:03,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802338508] [2024-06-14 14:08:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:03,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:03,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:03,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802338508] [2024-06-14 14:08:03,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802338508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:03,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:03,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:03,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002003483] [2024-06-14 14:08:03,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:03,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:03,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:03,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:03,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 461 transitions, 5779 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:03,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:03,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:03,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:04,209 INFO L124 PetriNetUnfolderBase]: 2991/5101 cut-off events. [2024-06-14 14:08:04,209 INFO L125 PetriNetUnfolderBase]: For 398132/398138 co-relation queries the response was YES. [2024-06-14 14:08:04,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34262 conditions, 5101 events. 2991/5101 cut-off events. For 398132/398138 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34500 event pairs, 580 based on Foata normal form. 5/5101 useless extension candidates. Maximal degree in co-relation 34100. Up to 4356 conditions per place. [2024-06-14 14:08:04,276 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 347 selfloop transitions, 137 changer transitions 0/491 dead transitions. [2024-06-14 14:08:04,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 491 transitions, 7181 flow [2024-06-14 14:08:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:04,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 14:08:04,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:08:04,278 INFO L175 Difference]: Start difference. First operand has 344 places, 461 transitions, 5779 flow. Second operand 9 states and 216 transitions. [2024-06-14 14:08:04,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 491 transitions, 7181 flow [2024-06-14 14:08:06,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 491 transitions, 6875 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:06,340 INFO L231 Difference]: Finished difference. Result has 345 places, 461 transitions, 5753 flow [2024-06-14 14:08:06,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5473, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5753, PETRI_PLACES=345, PETRI_TRANSITIONS=461} [2024-06-14 14:08:06,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-14 14:08:06,340 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 461 transitions, 5753 flow [2024-06-14 14:08:06,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:06,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:06,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:06,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 14:08:06,341 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:06,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:06,341 INFO L85 PathProgramCache]: Analyzing trace with hash -275307610, now seen corresponding path program 3 times [2024-06-14 14:08:06,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:06,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535631620] [2024-06-14 14:08:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:06,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:06,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:06,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535631620] [2024-06-14 14:08:06,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535631620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:06,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:06,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:06,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158065030] [2024-06-14 14:08:06,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:06,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:06,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:06,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:06,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:06,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 461 transitions, 5753 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:06,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:06,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:07,605 INFO L124 PetriNetUnfolderBase]: 3004/5121 cut-off events. [2024-06-14 14:08:07,605 INFO L125 PetriNetUnfolderBase]: For 410218/410224 co-relation queries the response was YES. [2024-06-14 14:08:07,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34510 conditions, 5121 events. 3004/5121 cut-off events. For 410218/410224 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34608 event pairs, 571 based on Foata normal form. 5/5121 useless extension candidates. Maximal degree in co-relation 34347. Up to 4502 conditions per place. [2024-06-14 14:08:07,672 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 74 changer transitions 0/502 dead transitions. [2024-06-14 14:08:07,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 502 transitions, 7065 flow [2024-06-14 14:08:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-14 14:08:07,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 14:08:07,674 INFO L175 Difference]: Start difference. First operand has 345 places, 461 transitions, 5753 flow. Second operand 12 states and 268 transitions. [2024-06-14 14:08:07,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 502 transitions, 7065 flow [2024-06-14 14:08:09,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 502 transitions, 6783 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:09,692 INFO L231 Difference]: Finished difference. Result has 351 places, 467 transitions, 5699 flow [2024-06-14 14:08:09,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5699, PETRI_PLACES=351, PETRI_TRANSITIONS=467} [2024-06-14 14:08:09,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-14 14:08:09,693 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 467 transitions, 5699 flow [2024-06-14 14:08:09,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:09,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:09,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:09,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 14:08:09,693 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:09,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash 654435596, now seen corresponding path program 4 times [2024-06-14 14:08:09,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:09,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216929170] [2024-06-14 14:08:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:09,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:09,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216929170] [2024-06-14 14:08:09,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216929170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:09,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:09,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:09,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757308521] [2024-06-14 14:08:09,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:09,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:09,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:09,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:09,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 467 transitions, 5699 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:09,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:09,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:09,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:10,914 INFO L124 PetriNetUnfolderBase]: 3017/5125 cut-off events. [2024-06-14 14:08:10,915 INFO L125 PetriNetUnfolderBase]: For 421694/421694 co-relation queries the response was YES. [2024-06-14 14:08:10,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34621 conditions, 5125 events. 3017/5125 cut-off events. For 421694/421694 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34582 event pairs, 590 based on Foata normal form. 1/5118 useless extension candidates. Maximal degree in co-relation 34456. Up to 4476 conditions per place. [2024-06-14 14:08:10,986 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 93 changer transitions 0/503 dead transitions. [2024-06-14 14:08:10,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 503 transitions, 7185 flow [2024-06-14 14:08:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 14:08:10,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:08:10,987 INFO L175 Difference]: Start difference. First operand has 351 places, 467 transitions, 5699 flow. Second operand 9 states and 213 transitions. [2024-06-14 14:08:10,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 503 transitions, 7185 flow [2024-06-14 14:08:13,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 503 transitions, 7002 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 14:08:13,055 INFO L231 Difference]: Finished difference. Result has 350 places, 473 transitions, 5760 flow [2024-06-14 14:08:13,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5760, PETRI_PLACES=350, PETRI_TRANSITIONS=473} [2024-06-14 14:08:13,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-14 14:08:13,055 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 473 transitions, 5760 flow [2024-06-14 14:08:13,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:13,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:13,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:13,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 14:08:13,056 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:13,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 634300144, now seen corresponding path program 5 times [2024-06-14 14:08:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:13,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895413568] [2024-06-14 14:08:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:13,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:13,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895413568] [2024-06-14 14:08:13,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895413568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:13,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:13,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:13,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381611713] [2024-06-14 14:08:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:13,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:13,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:13,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:13,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 473 transitions, 5760 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:13,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:13,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:13,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:14,242 INFO L124 PetriNetUnfolderBase]: 3030/5149 cut-off events. [2024-06-14 14:08:14,243 INFO L125 PetriNetUnfolderBase]: For 434546/434546 co-relation queries the response was YES. [2024-06-14 14:08:14,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34922 conditions, 5149 events. 3030/5149 cut-off events. For 434546/434546 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 34793 event pairs, 590 based on Foata normal form. 1/5142 useless extension candidates. Maximal degree in co-relation 34757. Up to 4346 conditions per place. [2024-06-14 14:08:14,314 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 150 changer transitions 0/515 dead transitions. [2024-06-14 14:08:14,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 515 transitions, 7486 flow [2024-06-14 14:08:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-14 14:08:14,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541125541125541 [2024-06-14 14:08:14,315 INFO L175 Difference]: Start difference. First operand has 350 places, 473 transitions, 5760 flow. Second operand 11 states and 256 transitions. [2024-06-14 14:08:14,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 515 transitions, 7486 flow [2024-06-14 14:08:16,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 515 transitions, 7247 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:16,458 INFO L231 Difference]: Finished difference. Result has 355 places, 479 transitions, 5891 flow [2024-06-14 14:08:16,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5891, PETRI_PLACES=355, PETRI_TRANSITIONS=479} [2024-06-14 14:08:16,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-14 14:08:16,458 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 479 transitions, 5891 flow [2024-06-14 14:08:16,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:16,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:16,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:16,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 14:08:16,459 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:16,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 738337384, now seen corresponding path program 6 times [2024-06-14 14:08:16,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:16,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564609575] [2024-06-14 14:08:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:16,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:16,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:16,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564609575] [2024-06-14 14:08:16,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564609575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:16,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:16,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:16,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932023577] [2024-06-14 14:08:16,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:16,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:16,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:16,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 479 transitions, 5891 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:16,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:16,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:16,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:17,607 INFO L124 PetriNetUnfolderBase]: 3027/5143 cut-off events. [2024-06-14 14:08:17,607 INFO L125 PetriNetUnfolderBase]: For 439098/439098 co-relation queries the response was YES. [2024-06-14 14:08:17,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35027 conditions, 5143 events. 3027/5143 cut-off events. For 439098/439098 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34746 event pairs, 590 based on Foata normal form. 1/5136 useless extension candidates. Maximal degree in co-relation 34861. Up to 4343 conditions per place. [2024-06-14 14:08:17,679 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 139 changer transitions 0/514 dead transitions. [2024-06-14 14:08:17,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 514 transitions, 7743 flow [2024-06-14 14:08:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 14:08:17,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:08:17,681 INFO L175 Difference]: Start difference. First operand has 355 places, 479 transitions, 5891 flow. Second operand 9 states and 222 transitions. [2024-06-14 14:08:17,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 514 transitions, 7743 flow [2024-06-14 14:08:19,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 514 transitions, 7477 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:19,986 INFO L231 Difference]: Finished difference. Result has 357 places, 479 transitions, 5909 flow [2024-06-14 14:08:19,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5909, PETRI_PLACES=357, PETRI_TRANSITIONS=479} [2024-06-14 14:08:19,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-14 14:08:19,987 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 479 transitions, 5909 flow [2024-06-14 14:08:19,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:19,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:19,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:19,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 14:08:19,987 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:19,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:19,987 INFO L85 PathProgramCache]: Analyzing trace with hash 424642990, now seen corresponding path program 4 times [2024-06-14 14:08:19,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:19,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121697165] [2024-06-14 14:08:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:20,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:20,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121697165] [2024-06-14 14:08:20,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121697165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:20,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:20,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:20,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199247913] [2024-06-14 14:08:20,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:20,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:20,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:20,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:20,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 479 transitions, 5909 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:20,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:20,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:20,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:21,267 INFO L124 PetriNetUnfolderBase]: 3037/5165 cut-off events. [2024-06-14 14:08:21,267 INFO L125 PetriNetUnfolderBase]: For 447929/447929 co-relation queries the response was YES. [2024-06-14 14:08:21,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35209 conditions, 5165 events. 3037/5165 cut-off events. For 447929/447929 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34937 event pairs, 583 based on Foata normal form. 1/5159 useless extension candidates. Maximal degree in co-relation 35042. Up to 4416 conditions per place. [2024-06-14 14:08:21,332 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 142 changer transitions 0/516 dead transitions. [2024-06-14 14:08:21,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 516 transitions, 7644 flow [2024-06-14 14:08:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 14:08:21,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 14:08:21,333 INFO L175 Difference]: Start difference. First operand has 357 places, 479 transitions, 5909 flow. Second operand 9 states and 217 transitions. [2024-06-14 14:08:21,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 516 transitions, 7644 flow [2024-06-14 14:08:23,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 516 transitions, 7350 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:23,621 INFO L231 Difference]: Finished difference. Result has 359 places, 485 transitions, 5982 flow [2024-06-14 14:08:23,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5621, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5982, PETRI_PLACES=359, PETRI_TRANSITIONS=485} [2024-06-14 14:08:23,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-14 14:08:23,621 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 485 transitions, 5982 flow [2024-06-14 14:08:23,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:23,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:23,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:23,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 14:08:23,622 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:23,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:23,622 INFO L85 PathProgramCache]: Analyzing trace with hash 424642804, now seen corresponding path program 7 times [2024-06-14 14:08:23,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:23,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823009578] [2024-06-14 14:08:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:23,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:23,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:23,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823009578] [2024-06-14 14:08:23,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823009578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:23,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:23,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342716433] [2024-06-14 14:08:23,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:23,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:23,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:23,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:23,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:23,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 485 transitions, 5982 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:23,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:23,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:23,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:24,858 INFO L124 PetriNetUnfolderBase]: 3042/5175 cut-off events. [2024-06-14 14:08:24,858 INFO L125 PetriNetUnfolderBase]: For 456335/456335 co-relation queries the response was YES. [2024-06-14 14:08:24,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35324 conditions, 5175 events. 3042/5175 cut-off events. For 456335/456335 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35062 event pairs, 574 based on Foata normal form. 1/5169 useless extension candidates. Maximal degree in co-relation 35155. Up to 4561 conditions per place. [2024-06-14 14:08:24,929 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 439 selfloop transitions, 70 changer transitions 0/516 dead transitions. [2024-06-14 14:08:24,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 516 transitions, 7093 flow [2024-06-14 14:08:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 14:08:24,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-14 14:08:24,931 INFO L175 Difference]: Start difference. First operand has 359 places, 485 transitions, 5982 flow. Second operand 9 states and 209 transitions. [2024-06-14 14:08:24,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 516 transitions, 7093 flow [2024-06-14 14:08:27,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 516 transitions, 6791 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:27,575 INFO L231 Difference]: Finished difference. Result has 362 places, 488 transitions, 5855 flow [2024-06-14 14:08:27,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5855, PETRI_PLACES=362, PETRI_TRANSITIONS=488} [2024-06-14 14:08:27,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-14 14:08:27,575 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 488 transitions, 5855 flow [2024-06-14 14:08:27,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:27,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:27,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:27,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 14:08:27,576 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:27,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:27,577 INFO L85 PathProgramCache]: Analyzing trace with hash 749770060, now seen corresponding path program 5 times [2024-06-14 14:08:27,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:27,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605741597] [2024-06-14 14:08:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:27,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:27,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:27,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605741597] [2024-06-14 14:08:27,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605741597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:27,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:27,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:27,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568023670] [2024-06-14 14:08:27,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:27,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:27,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:27,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:27,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:27,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 488 transitions, 5855 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:27,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:27,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:27,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:28,767 INFO L124 PetriNetUnfolderBase]: 3060/5205 cut-off events. [2024-06-14 14:08:28,767 INFO L125 PetriNetUnfolderBase]: For 469505/469505 co-relation queries the response was YES. [2024-06-14 14:08:28,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35476 conditions, 5205 events. 3060/5205 cut-off events. For 469505/469505 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35263 event pairs, 583 based on Foata normal form. 1/5199 useless extension candidates. Maximal degree in co-relation 35306. Up to 4442 conditions per place. [2024-06-14 14:08:28,838 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 365 selfloop transitions, 155 changer transitions 0/527 dead transitions. [2024-06-14 14:08:28,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 527 transitions, 7652 flow [2024-06-14 14:08:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-14 14:08:28,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-06-14 14:08:28,840 INFO L175 Difference]: Start difference. First operand has 362 places, 488 transitions, 5855 flow. Second operand 11 states and 250 transitions. [2024-06-14 14:08:28,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 527 transitions, 7652 flow [2024-06-14 14:08:31,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 527 transitions, 7492 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:31,501 INFO L231 Difference]: Finished difference. Result has 366 places, 497 transitions, 6128 flow [2024-06-14 14:08:31,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5703, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6128, PETRI_PLACES=366, PETRI_TRANSITIONS=497} [2024-06-14 14:08:31,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-14 14:08:31,502 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 497 transitions, 6128 flow [2024-06-14 14:08:31,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:31,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:31,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:31,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 14:08:31,503 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:31,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash 749591314, now seen corresponding path program 8 times [2024-06-14 14:08:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:31,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32519707] [2024-06-14 14:08:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:31,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32519707] [2024-06-14 14:08:31,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32519707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:31,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:31,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:31,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283641364] [2024-06-14 14:08:31,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:31,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:31,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:31,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:31,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 497 transitions, 6128 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:31,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:31,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:31,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:32,794 INFO L124 PetriNetUnfolderBase]: 3073/5228 cut-off events. [2024-06-14 14:08:32,794 INFO L125 PetriNetUnfolderBase]: For 483654/483654 co-relation queries the response was YES. [2024-06-14 14:08:32,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35982 conditions, 5228 events. 3073/5228 cut-off events. For 483654/483654 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35427 event pairs, 574 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 35811. Up to 4587 conditions per place. [2024-06-14 14:08:32,862 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 435 selfloop transitions, 88 changer transitions 0/530 dead transitions. [2024-06-14 14:08:32,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 530 transitions, 7488 flow [2024-06-14 14:08:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-14 14:08:32,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-14 14:08:32,863 INFO L175 Difference]: Start difference. First operand has 366 places, 497 transitions, 6128 flow. Second operand 10 states and 227 transitions. [2024-06-14 14:08:32,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 530 transitions, 7488 flow [2024-06-14 14:08:34,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 530 transitions, 7219 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:34,722 INFO L231 Difference]: Finished difference. Result has 371 places, 503 transitions, 6122 flow [2024-06-14 14:08:34,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6122, PETRI_PLACES=371, PETRI_TRANSITIONS=503} [2024-06-14 14:08:34,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-14 14:08:34,723 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 503 transitions, 6122 flow [2024-06-14 14:08:34,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:34,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:34,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:34,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:08:34,725 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:34,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash 749384110, now seen corresponding path program 6 times [2024-06-14 14:08:34,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:34,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485866488] [2024-06-14 14:08:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:34,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:34,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:34,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485866488] [2024-06-14 14:08:34,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485866488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:34,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:34,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412371144] [2024-06-14 14:08:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:34,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:35,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:35,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 503 transitions, 6122 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:35,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:35,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:35,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:35,937 INFO L124 PetriNetUnfolderBase]: 3070/5223 cut-off events. [2024-06-14 14:08:35,937 INFO L125 PetriNetUnfolderBase]: For 487804/487804 co-relation queries the response was YES. [2024-06-14 14:08:35,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35853 conditions, 5223 events. 3070/5223 cut-off events. For 487804/487804 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35398 event pairs, 583 based on Foata normal form. 1/5217 useless extension candidates. Maximal degree in co-relation 35680. Up to 4457 conditions per place. [2024-06-14 14:08:36,012 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 152 changer transitions 0/531 dead transitions. [2024-06-14 14:08:36,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 531 transitions, 7634 flow [2024-06-14 14:08:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-14 14:08:36,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-14 14:08:36,016 INFO L175 Difference]: Start difference. First operand has 371 places, 503 transitions, 6122 flow. Second operand 10 states and 233 transitions. [2024-06-14 14:08:36,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 531 transitions, 7634 flow [2024-06-14 14:08:38,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 531 transitions, 7469 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:38,450 INFO L231 Difference]: Finished difference. Result has 374 places, 503 transitions, 6267 flow [2024-06-14 14:08:38,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6267, PETRI_PLACES=374, PETRI_TRANSITIONS=503} [2024-06-14 14:08:38,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-14 14:08:38,451 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 503 transitions, 6267 flow [2024-06-14 14:08:38,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:38,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:38,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:38,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:08:38,454 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:38,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash 749383924, now seen corresponding path program 9 times [2024-06-14 14:08:38,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:38,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016800403] [2024-06-14 14:08:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:38,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:38,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:38,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016800403] [2024-06-14 14:08:38,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016800403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:38,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:38,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873512128] [2024-06-14 14:08:38,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:38,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:38,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:38,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:38,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:38,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 503 transitions, 6267 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:38,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:38,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:38,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:39,746 INFO L124 PetriNetUnfolderBase]: 3067/5220 cut-off events. [2024-06-14 14:08:39,746 INFO L125 PetriNetUnfolderBase]: For 492564/492564 co-relation queries the response was YES. [2024-06-14 14:08:39,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35995 conditions, 5220 events. 3067/5220 cut-off events. For 492564/492564 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35470 event pairs, 574 based on Foata normal form. 1/5214 useless extension candidates. Maximal degree in co-relation 35822. Up to 4580 conditions per place. [2024-06-14 14:08:39,818 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 88 changer transitions 0/531 dead transitions. [2024-06-14 14:08:39,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 531 transitions, 7383 flow [2024-06-14 14:08:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-14 14:08:39,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-14 14:08:39,820 INFO L175 Difference]: Start difference. First operand has 374 places, 503 transitions, 6267 flow. Second operand 12 states and 262 transitions. [2024-06-14 14:08:39,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 531 transitions, 7383 flow [2024-06-14 14:08:42,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 531 transitions, 7075 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:42,254 INFO L231 Difference]: Finished difference. Result has 378 places, 503 transitions, 6141 flow [2024-06-14 14:08:42,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5959, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6141, PETRI_PLACES=378, PETRI_TRANSITIONS=503} [2024-06-14 14:08:42,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 14:08:42,255 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 503 transitions, 6141 flow [2024-06-14 14:08:42,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:42,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:42,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:08:42,256 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:42,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:42,256 INFO L85 PathProgramCache]: Analyzing trace with hash -61539774, now seen corresponding path program 7 times [2024-06-14 14:08:42,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:42,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241779709] [2024-06-14 14:08:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:42,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:42,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:42,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241779709] [2024-06-14 14:08:42,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241779709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:42,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:42,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:42,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190825712] [2024-06-14 14:08:42,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:42,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:42,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:42,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:42,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:42,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 503 transitions, 6141 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:42,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:42,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:43,568 INFO L124 PetriNetUnfolderBase]: 3080/5253 cut-off events. [2024-06-14 14:08:43,568 INFO L125 PetriNetUnfolderBase]: For 507550/507556 co-relation queries the response was YES. [2024-06-14 14:08:43,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36131 conditions, 5253 events. 3080/5253 cut-off events. For 507550/507556 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35696 event pairs, 579 based on Foata normal form. 5/5253 useless extension candidates. Maximal degree in co-relation 35957. Up to 4547 conditions per place. [2024-06-14 14:08:43,643 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 116 changer transitions 0/539 dead transitions. [2024-06-14 14:08:43,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 539 transitions, 7749 flow [2024-06-14 14:08:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-14 14:08:43,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-14 14:08:43,645 INFO L175 Difference]: Start difference. First operand has 378 places, 503 transitions, 6141 flow. Second operand 12 states and 267 transitions. [2024-06-14 14:08:43,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 539 transitions, 7749 flow [2024-06-14 14:08:45,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 539 transitions, 7538 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-14 14:08:45,995 INFO L231 Difference]: Finished difference. Result has 379 places, 509 transitions, 6257 flow [2024-06-14 14:08:45,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5930, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6257, PETRI_PLACES=379, PETRI_TRANSITIONS=509} [2024-06-14 14:08:45,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-14 14:08:45,996 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 509 transitions, 6257 flow [2024-06-14 14:08:45,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:45,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:45,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:45,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:08:45,996 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:45,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:45,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1814130350, now seen corresponding path program 8 times [2024-06-14 14:08:45,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:45,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224320200] [2024-06-14 14:08:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:45,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:46,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:46,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224320200] [2024-06-14 14:08:46,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224320200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:46,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:46,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:46,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609401703] [2024-06-14 14:08:46,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:46,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:46,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:46,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:46,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:46,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 509 transitions, 6257 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:46,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:46,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:46,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:47,274 INFO L124 PetriNetUnfolderBase]: 3090/5267 cut-off events. [2024-06-14 14:08:47,274 INFO L125 PetriNetUnfolderBase]: For 517219/517225 co-relation queries the response was YES. [2024-06-14 14:08:47,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36433 conditions, 5267 events. 3090/5267 cut-off events. For 517219/517225 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35864 event pairs, 580 based on Foata normal form. 5/5267 useless extension candidates. Maximal degree in co-relation 36257. Up to 4478 conditions per place. [2024-06-14 14:08:47,471 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 162 changer transitions 0/548 dead transitions. [2024-06-14 14:08:47,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 548 transitions, 8114 flow [2024-06-14 14:08:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-14 14:08:47,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 14:08:47,472 INFO L175 Difference]: Start difference. First operand has 379 places, 509 transitions, 6257 flow. Second operand 11 states and 258 transitions. [2024-06-14 14:08:47,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 548 transitions, 8114 flow [2024-06-14 14:08:50,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 548 transitions, 7863 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:50,499 INFO L231 Difference]: Finished difference. Result has 382 places, 515 transitions, 6430 flow [2024-06-14 14:08:50,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6006, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6430, PETRI_PLACES=382, PETRI_TRANSITIONS=515} [2024-06-14 14:08:50,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-14 14:08:50,500 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 515 transitions, 6430 flow [2024-06-14 14:08:50,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:50,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:50,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:50,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:08:50,500 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:50,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:50,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1360568612, now seen corresponding path program 9 times [2024-06-14 14:08:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:50,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609713803] [2024-06-14 14:08:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:50,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:50,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:50,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609713803] [2024-06-14 14:08:50,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609713803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:50,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:50,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:50,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130394727] [2024-06-14 14:08:50,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:50,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:50,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:50,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:50,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:50,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:50,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 515 transitions, 6430 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:50,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:50,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:50,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:51,797 INFO L124 PetriNetUnfolderBase]: 3095/5274 cut-off events. [2024-06-14 14:08:51,797 INFO L125 PetriNetUnfolderBase]: For 526969/526975 co-relation queries the response was YES. [2024-06-14 14:08:51,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36673 conditions, 5274 events. 3095/5274 cut-off events. For 526969/526975 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35836 event pairs, 580 based on Foata normal form. 5/5274 useless extension candidates. Maximal degree in co-relation 36495. Up to 4484 conditions per place. [2024-06-14 14:08:51,873 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 377 selfloop transitions, 167 changer transitions 0/551 dead transitions. [2024-06-14 14:08:51,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 551 transitions, 8046 flow [2024-06-14 14:08:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 273 transitions. [2024-06-14 14:08:51,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 14:08:51,875 INFO L175 Difference]: Start difference. First operand has 382 places, 515 transitions, 6430 flow. Second operand 12 states and 273 transitions. [2024-06-14 14:08:51,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 551 transitions, 8046 flow [2024-06-14 14:08:54,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 551 transitions, 7767 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:54,647 INFO L231 Difference]: Finished difference. Result has 387 places, 518 transitions, 6527 flow [2024-06-14 14:08:54,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6527, PETRI_PLACES=387, PETRI_TRANSITIONS=518} [2024-06-14 14:08:54,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-14 14:08:54,647 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 518 transitions, 6527 flow [2024-06-14 14:08:54,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:54,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:54,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:54,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:08:54,648 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:54,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1442107224, now seen corresponding path program 10 times [2024-06-14 14:08:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:54,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505790762] [2024-06-14 14:08:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:54,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:54,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505790762] [2024-06-14 14:08:54,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505790762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:54,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:54,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:54,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582553290] [2024-06-14 14:08:54,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:54,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:54,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:54,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:54,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:54,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 518 transitions, 6527 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:54,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:54,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:54,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:55,927 INFO L124 PetriNetUnfolderBase]: 3092/5270 cut-off events. [2024-06-14 14:08:55,927 INFO L125 PetriNetUnfolderBase]: For 531383/531389 co-relation queries the response was YES. [2024-06-14 14:08:55,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36671 conditions, 5270 events. 3092/5270 cut-off events. For 531383/531389 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35855 event pairs, 580 based on Foata normal form. 5/5270 useless extension candidates. Maximal degree in co-relation 36492. Up to 4481 conditions per place. [2024-06-14 14:08:56,009 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 165 changer transitions 0/550 dead transitions. [2024-06-14 14:08:56,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 550 transitions, 8107 flow [2024-06-14 14:08:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-14 14:08:56,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562770562770563 [2024-06-14 14:08:56,010 INFO L175 Difference]: Start difference. First operand has 387 places, 518 transitions, 6527 flow. Second operand 11 states and 257 transitions. [2024-06-14 14:08:56,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 550 transitions, 8107 flow [2024-06-14 14:08:58,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 550 transitions, 7840 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:58,894 INFO L231 Difference]: Finished difference. Result has 389 places, 518 transitions, 6596 flow [2024-06-14 14:08:58,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6596, PETRI_PLACES=389, PETRI_TRANSITIONS=518} [2024-06-14 14:08:58,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-14 14:08:58,895 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 518 transitions, 6596 flow [2024-06-14 14:08:58,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:58,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:58,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:58,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:08:58,896 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:58,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1731703898, now seen corresponding path program 10 times [2024-06-14 14:08:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:58,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711830563] [2024-06-14 14:08:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:59,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:59,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711830563] [2024-06-14 14:08:59,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711830563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:59,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:59,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:59,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677492392] [2024-06-14 14:08:59,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:59,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:59,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:59,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:59,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:59,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 518 transitions, 6596 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:59,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:59,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:59,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:00,326 INFO L124 PetriNetUnfolderBase]: 3105/5292 cut-off events. [2024-06-14 14:09:00,326 INFO L125 PetriNetUnfolderBase]: For 546924/546930 co-relation queries the response was YES. [2024-06-14 14:09:00,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37006 conditions, 5292 events. 3105/5292 cut-off events. For 546924/546930 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 35981 event pairs, 571 based on Foata normal form. 5/5292 useless extension candidates. Maximal degree in co-relation 36826. Up to 4634 conditions per place. [2024-06-14 14:09:00,396 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 465 selfloop transitions, 86 changer transitions 0/558 dead transitions. [2024-06-14 14:09:00,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 558 transitions, 8269 flow [2024-06-14 14:09:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:09:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:09:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-14 14:09:00,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 14:09:00,398 INFO L175 Difference]: Start difference. First operand has 389 places, 518 transitions, 6596 flow. Second operand 13 states and 286 transitions. [2024-06-14 14:09:00,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 558 transitions, 8269 flow [2024-06-14 14:09:03,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 558 transitions, 7856 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 14:09:03,947 INFO L231 Difference]: Finished difference. Result has 392 places, 524 transitions, 6447 flow [2024-06-14 14:09:03,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6447, PETRI_PLACES=392, PETRI_TRANSITIONS=524} [2024-06-14 14:09:03,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-14 14:09:03,948 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 524 transitions, 6447 flow [2024-06-14 14:09:03,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:03,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:03,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:03,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:09:03,949 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:03,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash -666530376, now seen corresponding path program 11 times [2024-06-14 14:09:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:03,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53280162] [2024-06-14 14:09:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:04,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:04,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53280162] [2024-06-14 14:09:04,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53280162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:04,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:04,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527799967] [2024-06-14 14:09:04,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:04,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:04,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:04,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:04,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:04,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 524 transitions, 6447 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:04,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:04,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:04,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:05,264 INFO L124 PetriNetUnfolderBase]: 3110/5290 cut-off events. [2024-06-14 14:09:05,265 INFO L125 PetriNetUnfolderBase]: For 555066/555066 co-relation queries the response was YES. [2024-06-14 14:09:05,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36927 conditions, 5290 events. 3110/5290 cut-off events. For 555066/555066 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36041 event pairs, 574 based on Foata normal form. 1/5284 useless extension candidates. Maximal degree in co-relation 36745. Up to 4484 conditions per place. [2024-06-14 14:09:05,341 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 155 changer transitions 0/572 dead transitions. [2024-06-14 14:09:05,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 572 transitions, 8365 flow [2024-06-14 14:09:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:09:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:09:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-14 14:09:05,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 14:09:05,342 INFO L175 Difference]: Start difference. First operand has 392 places, 524 transitions, 6447 flow. Second operand 11 states and 267 transitions. [2024-06-14 14:09:05,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 572 transitions, 8365 flow [2024-06-14 14:09:08,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 572 transitions, 8143 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-14 14:09:08,510 INFO L231 Difference]: Finished difference. Result has 393 places, 527 transitions, 6642 flow [2024-06-14 14:09:08,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6642, PETRI_PLACES=393, PETRI_TRANSITIONS=527} [2024-06-14 14:09:08,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-14 14:09:08,511 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 527 transitions, 6642 flow [2024-06-14 14:09:08,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:08,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:08,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:08,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:09:08,511 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:08,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:08,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2012927748, now seen corresponding path program 11 times [2024-06-14 14:09:08,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:08,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073847114] [2024-06-14 14:09:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:08,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:08,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:08,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073847114] [2024-06-14 14:09:08,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073847114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:08,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:08,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:08,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772542350] [2024-06-14 14:09:08,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:08,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:08,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:08,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:08,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:08,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 527 transitions, 6642 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:08,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:08,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:08,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:09,688 INFO L124 PetriNetUnfolderBase]: 3115/5298 cut-off events. [2024-06-14 14:09:09,688 INFO L125 PetriNetUnfolderBase]: For 565766/565766 co-relation queries the response was YES. [2024-06-14 14:09:09,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 5298 events. 3115/5298 cut-off events. For 565766/565766 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36036 event pairs, 583 based on Foata normal form. 1/5292 useless extension candidates. Maximal degree in co-relation 37135. Up to 4512 conditions per place. [2024-06-14 14:09:09,767 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 385 selfloop transitions, 168 changer transitions 0/560 dead transitions. [2024-06-14 14:09:09,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 560 transitions, 8506 flow [2024-06-14 14:09:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:09:09,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-14 14:09:09,768 INFO L175 Difference]: Start difference. First operand has 393 places, 527 transitions, 6642 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:09:09,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 560 transitions, 8506 flow [2024-06-14 14:09:12,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 560 transitions, 8140 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-06-14 14:09:12,727 INFO L231 Difference]: Finished difference. Result has 389 places, 530 transitions, 6686 flow [2024-06-14 14:09:12,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6294, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6686, PETRI_PLACES=389, PETRI_TRANSITIONS=530} [2024-06-14 14:09:12,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-14 14:09:12,728 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 530 transitions, 6686 flow [2024-06-14 14:09:12,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:12,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:12,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:12,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:09:12,729 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:12,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:12,729 INFO L85 PathProgramCache]: Analyzing trace with hash -289619670, now seen corresponding path program 12 times [2024-06-14 14:09:12,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:12,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753394636] [2024-06-14 14:09:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:12,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:12,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753394636] [2024-06-14 14:09:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753394636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:12,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:12,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:12,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932465812] [2024-06-14 14:09:12,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:12,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:12,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:12,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:12,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:13,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:13,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 530 transitions, 6686 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:13,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:13,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:13,972 INFO L124 PetriNetUnfolderBase]: 3112/5295 cut-off events. [2024-06-14 14:09:13,973 INFO L125 PetriNetUnfolderBase]: For 540561/540561 co-relation queries the response was YES. [2024-06-14 14:09:14,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36977 conditions, 5295 events. 3112/5295 cut-off events. For 540561/540561 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36027 event pairs, 574 based on Foata normal form. 1/5289 useless extension candidates. Maximal degree in co-relation 36796. Up to 4488 conditions per place. [2024-06-14 14:09:14,052 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 155 changer transitions 0/566 dead transitions. [2024-06-14 14:09:14,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 566 transitions, 8314 flow [2024-06-14 14:09:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 14:09:14,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:09:14,053 INFO L175 Difference]: Start difference. First operand has 389 places, 530 transitions, 6686 flow. Second operand 9 states and 222 transitions. [2024-06-14 14:09:14,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 566 transitions, 8314 flow [2024-06-14 14:09:17,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 566 transitions, 7964 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 14:09:17,538 INFO L231 Difference]: Finished difference. Result has 390 places, 530 transitions, 6669 flow [2024-06-14 14:09:17,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6669, PETRI_PLACES=390, PETRI_TRANSITIONS=530} [2024-06-14 14:09:17,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 14:09:17,539 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 530 transitions, 6669 flow [2024-06-14 14:09:17,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:17,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:17,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:17,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:09:17,539 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:17,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:17,540 INFO L85 PathProgramCache]: Analyzing trace with hash -289440924, now seen corresponding path program 12 times [2024-06-14 14:09:17,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:17,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868109952] [2024-06-14 14:09:17,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:17,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:17,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:17,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868109952] [2024-06-14 14:09:17,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868109952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:17,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:17,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:17,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038254061] [2024-06-14 14:09:17,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:17,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:17,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:17,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:17,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 530 transitions, 6669 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:17,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:17,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:17,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:18,809 INFO L124 PetriNetUnfolderBase]: 3125/5316 cut-off events. [2024-06-14 14:09:18,809 INFO L125 PetriNetUnfolderBase]: For 536979/536979 co-relation queries the response was YES. [2024-06-14 14:09:18,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37107 conditions, 5316 events. 3125/5316 cut-off events. For 536979/536979 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36191 event pairs, 583 based on Foata normal form. 1/5310 useless extension candidates. Maximal degree in co-relation 36928. Up to 4523 conditions per place. [2024-06-14 14:09:18,880 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 376 selfloop transitions, 181 changer transitions 0/564 dead transitions. [2024-06-14 14:09:18,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 564 transitions, 8564 flow [2024-06-14 14:09:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 14:09:18,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:09:18,882 INFO L175 Difference]: Start difference. First operand has 390 places, 530 transitions, 6669 flow. Second operand 9 states and 213 transitions. [2024-06-14 14:09:18,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 564 transitions, 8564 flow [2024-06-14 14:09:21,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 564 transitions, 8234 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:09:21,718 INFO L231 Difference]: Finished difference. Result has 390 places, 536 transitions, 6812 flow [2024-06-14 14:09:21,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6812, PETRI_PLACES=390, PETRI_TRANSITIONS=536} [2024-06-14 14:09:21,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 14:09:21,732 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 536 transitions, 6812 flow [2024-06-14 14:09:21,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:21,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:21,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:21,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:09:21,733 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:21,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:21,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1193173496, now seen corresponding path program 1 times [2024-06-14 14:09:21,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:21,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541498760] [2024-06-14 14:09:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:21,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:21,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:21,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541498760] [2024-06-14 14:09:21,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541498760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:21,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:21,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:21,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693401778] [2024-06-14 14:09:21,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:21,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:21,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:22,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:22,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 536 transitions, 6812 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:22,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:22,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:22,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:23,084 INFO L124 PetriNetUnfolderBase]: 3260/5545 cut-off events. [2024-06-14 14:09:23,084 INFO L125 PetriNetUnfolderBase]: For 664055/664061 co-relation queries the response was YES. [2024-06-14 14:09:23,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39765 conditions, 5545 events. 3260/5545 cut-off events. For 664055/664061 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 37890 event pairs, 517 based on Foata normal form. 16/5556 useless extension candidates. Maximal degree in co-relation 39586. Up to 4545 conditions per place. [2024-06-14 14:09:23,164 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 114 changer transitions 0/580 dead transitions. [2024-06-14 14:09:23,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 580 transitions, 8594 flow [2024-06-14 14:09:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 14:09:23,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 14:09:23,165 INFO L175 Difference]: Start difference. First operand has 390 places, 536 transitions, 6812 flow. Second operand 8 states and 202 transitions. [2024-06-14 14:09:23,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 580 transitions, 8594 flow [2024-06-14 14:09:26,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 580 transitions, 8280 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:26,697 INFO L231 Difference]: Finished difference. Result has 393 places, 543 transitions, 6857 flow [2024-06-14 14:09:26,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6502, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6857, PETRI_PLACES=393, PETRI_TRANSITIONS=543} [2024-06-14 14:09:26,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-14 14:09:26,698 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 543 transitions, 6857 flow [2024-06-14 14:09:26,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:26,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:26,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:26,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:09:26,698 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:26,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:26,698 INFO L85 PathProgramCache]: Analyzing trace with hash 14286088, now seen corresponding path program 2 times [2024-06-14 14:09:26,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:26,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109974956] [2024-06-14 14:09:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:26,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:26,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:26,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109974956] [2024-06-14 14:09:26,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109974956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:26,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:26,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:26,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885898615] [2024-06-14 14:09:26,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:26,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:26,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:26,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:26,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:27,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:27,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 543 transitions, 6857 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:27,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:27,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:27,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:28,125 INFO L124 PetriNetUnfolderBase]: 3316/5641 cut-off events. [2024-06-14 14:09:28,125 INFO L125 PetriNetUnfolderBase]: For 688503/688509 co-relation queries the response was YES. [2024-06-14 14:09:28,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40414 conditions, 5641 events. 3316/5641 cut-off events. For 688503/688509 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 38669 event pairs, 627 based on Foata normal form. 20/5656 useless extension candidates. Maximal degree in co-relation 40234. Up to 4756 conditions per place. [2024-06-14 14:09:28,214 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 175 changer transitions 0/579 dead transitions. [2024-06-14 14:09:28,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 579 transitions, 8561 flow [2024-06-14 14:09:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 14:09:28,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:09:28,216 INFO L175 Difference]: Start difference. First operand has 393 places, 543 transitions, 6857 flow. Second operand 9 states and 219 transitions. [2024-06-14 14:09:28,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 579 transitions, 8561 flow [2024-06-14 14:09:31,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 579 transitions, 8389 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:31,969 INFO L231 Difference]: Finished difference. Result has 399 places, 545 transitions, 7095 flow [2024-06-14 14:09:31,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7095, PETRI_PLACES=399, PETRI_TRANSITIONS=545} [2024-06-14 14:09:31,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-14 14:09:31,970 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 545 transitions, 7095 flow [2024-06-14 14:09:31,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:31,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:31,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:31,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:09:31,970 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:31,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash -275399680, now seen corresponding path program 3 times [2024-06-14 14:09:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:31,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219475695] [2024-06-14 14:09:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:31,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:32,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219475695] [2024-06-14 14:09:32,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219475695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:32,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:32,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:32,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588053392] [2024-06-14 14:09:32,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:32,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:32,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:32,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:32,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:32,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 545 transitions, 7095 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:32,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:32,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:32,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:33,382 INFO L124 PetriNetUnfolderBase]: 3372/5729 cut-off events. [2024-06-14 14:09:33,382 INFO L125 PetriNetUnfolderBase]: For 680257/680263 co-relation queries the response was YES. [2024-06-14 14:09:33,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41299 conditions, 5729 events. 3372/5729 cut-off events. For 680257/680263 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 39328 event pairs, 623 based on Foata normal form. 16/5740 useless extension candidates. Maximal degree in co-relation 41117. Up to 4784 conditions per place. [2024-06-14 14:09:33,465 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 179 changer transitions 0/587 dead transitions. [2024-06-14 14:09:33,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 587 transitions, 8859 flow [2024-06-14 14:09:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 14:09:33,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:09:33,466 INFO L175 Difference]: Start difference. First operand has 399 places, 545 transitions, 7095 flow. Second operand 9 states and 222 transitions. [2024-06-14 14:09:33,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 587 transitions, 8859 flow [2024-06-14 14:09:36,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 587 transitions, 8487 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:36,891 INFO L231 Difference]: Finished difference. Result has 402 places, 550 transitions, 7180 flow [2024-06-14 14:09:36,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6723, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7180, PETRI_PLACES=402, PETRI_TRANSITIONS=550} [2024-06-14 14:09:36,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-14 14:09:36,899 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 550 transitions, 7180 flow [2024-06-14 14:09:36,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:36,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:36,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:36,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:09:36,899 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:36,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:36,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1071212250, now seen corresponding path program 4 times [2024-06-14 14:09:36,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:36,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321148326] [2024-06-14 14:09:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:37,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:37,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321148326] [2024-06-14 14:09:37,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321148326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:37,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:37,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:37,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816653955] [2024-06-14 14:09:37,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:37,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:37,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:37,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:37,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:37,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:37,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 550 transitions, 7180 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:37,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:37,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:37,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:38,288 INFO L124 PetriNetUnfolderBase]: 3428/5817 cut-off events. [2024-06-14 14:09:38,288 INFO L125 PetriNetUnfolderBase]: For 717078/717084 co-relation queries the response was YES. [2024-06-14 14:09:38,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42019 conditions, 5817 events. 3428/5817 cut-off events. For 717078/717084 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 39994 event pairs, 643 based on Foata normal form. 20/5832 useless extension candidates. Maximal degree in co-relation 41835. Up to 4932 conditions per place. [2024-06-14 14:09:38,375 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 178 changer transitions 0/589 dead transitions. [2024-06-14 14:09:38,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 589 transitions, 8922 flow [2024-06-14 14:09:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:09:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:09:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 276 transitions. [2024-06-14 14:09:38,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:09:38,376 INFO L175 Difference]: Start difference. First operand has 402 places, 550 transitions, 7180 flow. Second operand 12 states and 276 transitions. [2024-06-14 14:09:38,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 589 transitions, 8922 flow [2024-06-14 14:09:41,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 589 transitions, 8537 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:41,841 INFO L231 Difference]: Finished difference. Result has 408 places, 552 transitions, 7215 flow [2024-06-14 14:09:41,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6795, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7215, PETRI_PLACES=408, PETRI_TRANSITIONS=552} [2024-06-14 14:09:41,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-14 14:09:41,841 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 552 transitions, 7215 flow [2024-06-14 14:09:41,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:41,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:41,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:41,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:09:41,842 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:41,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1442110200, now seen corresponding path program 5 times [2024-06-14 14:09:41,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:41,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778776283] [2024-06-14 14:09:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:42,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:42,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778776283] [2024-06-14 14:09:42,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778776283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:42,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:42,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:42,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501246006] [2024-06-14 14:09:42,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:42,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:42,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:42,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:42,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 552 transitions, 7215 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:42,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:42,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:42,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:43,309 INFO L124 PetriNetUnfolderBase]: 3484/5913 cut-off events. [2024-06-14 14:09:43,310 INFO L125 PetriNetUnfolderBase]: For 731073/731079 co-relation queries the response was YES. [2024-06-14 14:09:43,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42674 conditions, 5913 events. 3484/5913 cut-off events. For 731073/731079 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 40769 event pairs, 655 based on Foata normal form. 20/5928 useless extension candidates. Maximal degree in co-relation 42489. Up to 5020 conditions per place. [2024-06-14 14:09:43,399 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 176 changer transitions 0/590 dead transitions. [2024-06-14 14:09:43,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 590 transitions, 8965 flow [2024-06-14 14:09:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:09:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:09:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-06-14 14:09:43,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627705627705628 [2024-06-14 14:09:43,401 INFO L175 Difference]: Start difference. First operand has 408 places, 552 transitions, 7215 flow. Second operand 11 states and 260 transitions. [2024-06-14 14:09:43,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 590 transitions, 8965 flow [2024-06-14 14:09:47,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 590 transitions, 8579 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-14 14:09:47,758 INFO L231 Difference]: Finished difference. Result has 409 places, 554 transitions, 7249 flow [2024-06-14 14:09:47,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6829, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7249, PETRI_PLACES=409, PETRI_TRANSITIONS=554} [2024-06-14 14:09:47,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-14 14:09:47,759 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 554 transitions, 7249 flow [2024-06-14 14:09:47,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:47,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:47,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:47,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:09:47,760 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:47,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1442436630, now seen corresponding path program 6 times [2024-06-14 14:09:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:47,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127343835] [2024-06-14 14:09:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:47,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:48,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:48,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127343835] [2024-06-14 14:09:48,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127343835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:48,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:48,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:48,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687660444] [2024-06-14 14:09:48,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:48,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:48,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:48,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:48,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 554 transitions, 7249 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:48,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:48,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:48,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:49,363 INFO L124 PetriNetUnfolderBase]: 3540/6001 cut-off events. [2024-06-14 14:09:49,363 INFO L125 PetriNetUnfolderBase]: For 722274/722280 co-relation queries the response was YES. [2024-06-14 14:09:49,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43217 conditions, 6001 events. 3540/6001 cut-off events. For 722274/722280 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41378 event pairs, 651 based on Foata normal form. 16/6012 useless extension candidates. Maximal degree in co-relation 43031. Up to 4984 conditions per place. [2024-06-14 14:09:49,447 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 409 selfloop transitions, 182 changer transitions 0/598 dead transitions. [2024-06-14 14:09:49,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 598 transitions, 9069 flow [2024-06-14 14:09:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:09:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:09:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-14 14:09:49,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670995670995671 [2024-06-14 14:09:49,448 INFO L175 Difference]: Start difference. First operand has 409 places, 554 transitions, 7249 flow. Second operand 11 states and 262 transitions. [2024-06-14 14:09:49,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 598 transitions, 9069 flow [2024-06-14 14:09:53,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 598 transitions, 8683 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 14:09:53,973 INFO L231 Difference]: Finished difference. Result has 412 places, 559 transitions, 7348 flow [2024-06-14 14:09:53,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6863, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7348, PETRI_PLACES=412, PETRI_TRANSITIONS=559} [2024-06-14 14:09:53,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-14 14:09:53,974 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 559 transitions, 7348 flow [2024-06-14 14:09:53,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:53,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:53,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:53,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:09:53,974 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:53,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1057867866, now seen corresponding path program 1 times [2024-06-14 14:09:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:53,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224362982] [2024-06-14 14:09:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:53,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:54,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:54,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224362982] [2024-06-14 14:09:54,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224362982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:54,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:54,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:54,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833083328] [2024-06-14 14:09:54,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:54,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:54,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:54,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:54,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:54,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:54,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 559 transitions, 7348 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:54,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:54,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:54,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:55,623 INFO L124 PetriNetUnfolderBase]: 3580/6073 cut-off events. [2024-06-14 14:09:55,623 INFO L125 PetriNetUnfolderBase]: For 735497/735503 co-relation queries the response was YES. [2024-06-14 14:09:55,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43709 conditions, 6073 events. 3580/6073 cut-off events. For 735497/735503 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 41985 event pairs, 663 based on Foata normal form. 16/6084 useless extension candidates. Maximal degree in co-relation 43521. Up to 4984 conditions per place. [2024-06-14 14:09:55,703 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 187 changer transitions 0/601 dead transitions. [2024-06-14 14:09:55,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 601 transitions, 9136 flow [2024-06-14 14:09:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:09:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:09:55,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-14 14:09:55,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-14 14:09:55,705 INFO L175 Difference]: Start difference. First operand has 412 places, 559 transitions, 7348 flow. Second operand 12 states and 278 transitions. [2024-06-14 14:09:55,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 601 transitions, 9136 flow [2024-06-14 14:09:59,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 601 transitions, 8731 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 14:09:59,921 INFO L231 Difference]: Finished difference. Result has 416 places, 561 transitions, 7376 flow [2024-06-14 14:09:59,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6943, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7376, PETRI_PLACES=416, PETRI_TRANSITIONS=561} [2024-06-14 14:09:59,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-14 14:09:59,922 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 561 transitions, 7376 flow [2024-06-14 14:09:59,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:59,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:59,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:59,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:09:59,922 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:59,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:59,923 INFO L85 PathProgramCache]: Analyzing trace with hash 657589674, now seen corresponding path program 1 times [2024-06-14 14:09:59,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:59,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984560599] [2024-06-14 14:09:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:59,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:00,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:00,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984560599] [2024-06-14 14:10:00,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984560599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:00,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:00,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:10:00,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144348342] [2024-06-14 14:10:00,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:00,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:10:00,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:10:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:10:00,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:00,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 561 transitions, 7376 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:00,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:00,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:00,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:01,399 INFO L124 PetriNetUnfolderBase]: 3588/6083 cut-off events. [2024-06-14 14:10:01,399 INFO L125 PetriNetUnfolderBase]: For 688527/688533 co-relation queries the response was YES. [2024-06-14 14:10:01,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43810 conditions, 6083 events. 3588/6083 cut-off events. For 688527/688533 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42045 event pairs, 674 based on Foata normal form. 6/6084 useless extension candidates. Maximal degree in co-relation 43621. Up to 5427 conditions per place. [2024-06-14 14:10:01,496 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 508 selfloop transitions, 67 changer transitions 0/582 dead transitions. [2024-06-14 14:10:01,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 582 transitions, 8638 flow [2024-06-14 14:10:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 14:10:01,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 14:10:01,498 INFO L175 Difference]: Start difference. First operand has 416 places, 561 transitions, 7376 flow. Second operand 8 states and 182 transitions. [2024-06-14 14:10:01,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 582 transitions, 8638 flow [2024-06-14 14:10:05,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 582 transitions, 8227 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-14 14:10:05,727 INFO L231 Difference]: Finished difference. Result has 414 places, 563 transitions, 7174 flow [2024-06-14 14:10:05,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6965, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7174, PETRI_PLACES=414, PETRI_TRANSITIONS=563} [2024-06-14 14:10:05,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-14 14:10:05,727 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 563 transitions, 7174 flow [2024-06-14 14:10:05,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:05,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:05,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:05,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:10:05,728 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:05,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1057862906, now seen corresponding path program 2 times [2024-06-14 14:10:05,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:05,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240691542] [2024-06-14 14:10:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:05,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240691542] [2024-06-14 14:10:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240691542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:05,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:05,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:10:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128968353] [2024-06-14 14:10:05,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:05,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:10:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:10:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:10:05,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:05,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 563 transitions, 7174 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:05,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:05,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:05,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:07,150 INFO L124 PetriNetUnfolderBase]: 3596/6091 cut-off events. [2024-06-14 14:10:07,150 INFO L125 PetriNetUnfolderBase]: For 699087/699093 co-relation queries the response was YES. [2024-06-14 14:10:07,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43478 conditions, 6091 events. 3596/6091 cut-off events. For 699087/699093 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42084 event pairs, 666 based on Foata normal form. 6/6092 useless extension candidates. Maximal degree in co-relation 43288. Up to 5419 conditions per place. [2024-06-14 14:10:07,242 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 507 selfloop transitions, 72 changer transitions 0/586 dead transitions. [2024-06-14 14:10:07,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 586 transitions, 8452 flow [2024-06-14 14:10:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 14:10:07,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 14:10:07,243 INFO L175 Difference]: Start difference. First operand has 414 places, 563 transitions, 7174 flow. Second operand 9 states and 201 transitions. [2024-06-14 14:10:07,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 586 transitions, 8452 flow [2024-06-14 14:10:11,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 586 transitions, 8259 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:11,443 INFO L231 Difference]: Finished difference. Result has 417 places, 565 transitions, 7204 flow [2024-06-14 14:10:11,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6981, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7204, PETRI_PLACES=417, PETRI_TRANSITIONS=565} [2024-06-14 14:10:11,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-14 14:10:11,444 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 565 transitions, 7204 flow [2024-06-14 14:10:11,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:11,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:11,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:11,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:10:11,445 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:11,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2023236468, now seen corresponding path program 13 times [2024-06-14 14:10:11,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:11,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079749605] [2024-06-14 14:10:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:11,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:11,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079749605] [2024-06-14 14:10:11,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079749605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:11,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:11,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:11,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509194080] [2024-06-14 14:10:11,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:11,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:11,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:11,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:11,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:11,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:11,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 565 transitions, 7204 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:11,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:11,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:11,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:12,883 INFO L124 PetriNetUnfolderBase]: 3617/6128 cut-off events. [2024-06-14 14:10:12,883 INFO L125 PetriNetUnfolderBase]: For 717513/717519 co-relation queries the response was YES. [2024-06-14 14:10:12,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43964 conditions, 6128 events. 3617/6128 cut-off events. For 717513/717519 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42371 event pairs, 683 based on Foata normal form. 1/6122 useless extension candidates. Maximal degree in co-relation 43773. Up to 5226 conditions per place. [2024-06-14 14:10:12,979 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 174 changer transitions 0/607 dead transitions. [2024-06-14 14:10:12,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 607 transitions, 9258 flow [2024-06-14 14:10:12,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:10:12,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-14 14:10:12,981 INFO L175 Difference]: Start difference. First operand has 417 places, 565 transitions, 7204 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:10:12,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 607 transitions, 9258 flow [2024-06-14 14:10:17,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 607 transitions, 9051 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:17,411 INFO L231 Difference]: Finished difference. Result has 418 places, 574 transitions, 7457 flow [2024-06-14 14:10:17,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6997, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7457, PETRI_PLACES=418, PETRI_TRANSITIONS=574} [2024-06-14 14:10:17,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-14 14:10:17,421 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 574 transitions, 7457 flow [2024-06-14 14:10:17,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:17,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:17,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:17,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:10:17,421 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:17,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:17,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2023356438, now seen corresponding path program 14 times [2024-06-14 14:10:17,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:17,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055388327] [2024-06-14 14:10:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:17,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:17,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:17,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055388327] [2024-06-14 14:10:17,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055388327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:17,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:17,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:17,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616848364] [2024-06-14 14:10:17,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:17,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:17,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:17,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:17,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:17,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 574 transitions, 7457 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:17,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:17,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:17,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:18,986 INFO L124 PetriNetUnfolderBase]: 3614/6126 cut-off events. [2024-06-14 14:10:18,986 INFO L125 PetriNetUnfolderBase]: For 723398/723404 co-relation queries the response was YES. [2024-06-14 14:10:19,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44100 conditions, 6126 events. 3614/6126 cut-off events. For 723398/723404 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42377 event pairs, 668 based on Foata normal form. 5/6126 useless extension candidates. Maximal degree in co-relation 43908. Up to 5437 conditions per place. [2024-06-14 14:10:19,078 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 76 changer transitions 0/601 dead transitions. [2024-06-14 14:10:19,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 601 transitions, 8713 flow [2024-06-14 14:10:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:10:19,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 14:10:19,079 INFO L175 Difference]: Start difference. First operand has 418 places, 574 transitions, 7457 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:10:19,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 601 transitions, 8713 flow [2024-06-14 14:10:23,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 601 transitions, 8331 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:23,668 INFO L231 Difference]: Finished difference. Result has 421 places, 574 transitions, 7233 flow [2024-06-14 14:10:23,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7075, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7233, PETRI_PLACES=421, PETRI_TRANSITIONS=574} [2024-06-14 14:10:23,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-14 14:10:23,823 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 574 transitions, 7233 flow [2024-06-14 14:10:23,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:23,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:23,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:23,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:10:23,824 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:23,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2072429038, now seen corresponding path program 15 times [2024-06-14 14:10:23,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:23,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908249724] [2024-06-14 14:10:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:24,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:24,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908249724] [2024-06-14 14:10:24,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908249724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:24,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:24,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645987551] [2024-06-14 14:10:24,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:24,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:24,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:24,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:24,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 574 transitions, 7233 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:24,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:24,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:24,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:25,401 INFO L124 PetriNetUnfolderBase]: 3635/6157 cut-off events. [2024-06-14 14:10:25,401 INFO L125 PetriNetUnfolderBase]: For 747653/747659 co-relation queries the response was YES. [2024-06-14 14:10:25,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44307 conditions, 6157 events. 3635/6157 cut-off events. For 747653/747659 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42585 event pairs, 681 based on Foata normal form. 1/6151 useless extension candidates. Maximal degree in co-relation 44114. Up to 5247 conditions per place. [2024-06-14 14:10:25,501 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 187 changer transitions 0/625 dead transitions. [2024-06-14 14:10:25,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 625 transitions, 9577 flow [2024-06-14 14:10:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-14 14:10:25,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 14:10:25,503 INFO L175 Difference]: Start difference. First operand has 421 places, 574 transitions, 7233 flow. Second operand 10 states and 246 transitions. [2024-06-14 14:10:25,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 625 transitions, 9577 flow [2024-06-14 14:10:30,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 625 transitions, 9413 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:30,969 INFO L231 Difference]: Finished difference. Result has 423 places, 583 transitions, 7549 flow [2024-06-14 14:10:30,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7069, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7549, PETRI_PLACES=423, PETRI_TRANSITIONS=583} [2024-06-14 14:10:30,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-14 14:10:30,970 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 583 transitions, 7549 flow [2024-06-14 14:10:30,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:30,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:30,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:30,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:10:30,971 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:30,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:30,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2061953518, now seen corresponding path program 16 times [2024-06-14 14:10:30,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:30,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078982686] [2024-06-14 14:10:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:30,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:31,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:31,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078982686] [2024-06-14 14:10:31,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078982686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:31,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:31,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016959112] [2024-06-14 14:10:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:31,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:31,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:31,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:31,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 583 transitions, 7549 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:31,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:31,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:31,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:32,492 INFO L124 PetriNetUnfolderBase]: 3632/6153 cut-off events. [2024-06-14 14:10:32,492 INFO L125 PetriNetUnfolderBase]: For 754345/754351 co-relation queries the response was YES. [2024-06-14 14:10:32,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44578 conditions, 6153 events. 3632/6153 cut-off events. For 754345/754351 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42602 event pairs, 683 based on Foata normal form. 1/6147 useless extension candidates. Maximal degree in co-relation 44384. Up to 5244 conditions per place. [2024-06-14 14:10:32,587 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 189 changer transitions 0/622 dead transitions. [2024-06-14 14:10:32,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 622 transitions, 9559 flow [2024-06-14 14:10:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:10:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:10:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-14 14:10:32,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-14 14:10:32,589 INFO L175 Difference]: Start difference. First operand has 423 places, 583 transitions, 7549 flow. Second operand 11 states and 259 transitions. [2024-06-14 14:10:32,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 622 transitions, 9559 flow [2024-06-14 14:10:37,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 622 transitions, 9151 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:37,981 INFO L231 Difference]: Finished difference. Result has 427 places, 583 transitions, 7525 flow [2024-06-14 14:10:37,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7525, PETRI_PLACES=427, PETRI_TRANSITIONS=583} [2024-06-14 14:10:37,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-14 14:10:37,982 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 583 transitions, 7525 flow [2024-06-14 14:10:37,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:37,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:37,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:37,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:10:37,982 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:37,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash 410945750, now seen corresponding path program 17 times [2024-06-14 14:10:37,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:37,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141904942] [2024-06-14 14:10:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:37,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:38,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141904942] [2024-06-14 14:10:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141904942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:38,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:38,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534717706] [2024-06-14 14:10:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:38,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:38,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:38,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:38,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:38,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:38,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 583 transitions, 7525 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:38,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:38,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:38,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:39,611 INFO L124 PetriNetUnfolderBase]: 3637/6158 cut-off events. [2024-06-14 14:10:39,611 INFO L125 PetriNetUnfolderBase]: For 767418/767424 co-relation queries the response was YES. [2024-06-14 14:10:39,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44706 conditions, 6158 events. 3637/6158 cut-off events. For 767418/767424 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42642 event pairs, 682 based on Foata normal form. 5/6155 useless extension candidates. Maximal degree in co-relation 44511. Up to 5250 conditions per place. [2024-06-14 14:10:39,699 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 191 changer transitions 0/619 dead transitions. [2024-06-14 14:10:39,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 619 transitions, 9331 flow [2024-06-14 14:10:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 14:10:39,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-14 14:10:39,701 INFO L175 Difference]: Start difference. First operand has 427 places, 583 transitions, 7525 flow. Second operand 9 states and 215 transitions. [2024-06-14 14:10:39,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 619 transitions, 9331 flow [2024-06-14 14:10:43,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 619 transitions, 8966 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:43,881 INFO L231 Difference]: Finished difference. Result has 428 places, 586 transitions, 7588 flow [2024-06-14 14:10:43,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7588, PETRI_PLACES=428, PETRI_TRANSITIONS=586} [2024-06-14 14:10:43,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-14 14:10:43,882 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 586 transitions, 7588 flow [2024-06-14 14:10:43,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:43,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:43,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:43,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:10:43,882 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:43,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:43,883 INFO L85 PathProgramCache]: Analyzing trace with hash -365294612, now seen corresponding path program 18 times [2024-06-14 14:10:43,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:43,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935088697] [2024-06-14 14:10:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:43,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:44,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935088697] [2024-06-14 14:10:44,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935088697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:44,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:44,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654542592] [2024-06-14 14:10:44,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:44,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:44,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:44,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:44,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 586 transitions, 7588 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:44,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:44,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:44,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:45,363 INFO L124 PetriNetUnfolderBase]: 3634/6160 cut-off events. [2024-06-14 14:10:45,364 INFO L125 PetriNetUnfolderBase]: For 772678/772684 co-relation queries the response was YES. [2024-06-14 14:10:45,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44700 conditions, 6160 events. 3634/6160 cut-off events. For 772678/772684 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42682 event pairs, 668 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 44504. Up to 5455 conditions per place. [2024-06-14 14:10:45,460 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 525 selfloop transitions, 86 changer transitions 0/618 dead transitions. [2024-06-14 14:10:45,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 618 transitions, 9120 flow [2024-06-14 14:10:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:10:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:10:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-14 14:10:45,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-14 14:10:45,461 INFO L175 Difference]: Start difference. First operand has 428 places, 586 transitions, 7588 flow. Second operand 12 states and 267 transitions. [2024-06-14 14:10:45,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 618 transitions, 9120 flow [2024-06-14 14:10:50,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 618 transitions, 8691 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:50,445 INFO L231 Difference]: Finished difference. Result has 433 places, 586 transitions, 7337 flow [2024-06-14 14:10:50,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7337, PETRI_PLACES=433, PETRI_TRANSITIONS=586} [2024-06-14 14:10:50,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-14 14:10:50,448 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 586 transitions, 7337 flow [2024-06-14 14:10:50,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:50,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:50,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:50,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:10:50,448 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:50,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash -209721332, now seen corresponding path program 19 times [2024-06-14 14:10:50,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:50,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114647387] [2024-06-14 14:10:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:50,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:50,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:50,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114647387] [2024-06-14 14:10:50,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114647387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:50,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:50,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:50,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002865791] [2024-06-14 14:10:50,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:50,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:50,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:50,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:50,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 586 transitions, 7337 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:50,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:50,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:50,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:51,926 INFO L124 PetriNetUnfolderBase]: 3639/6163 cut-off events. [2024-06-14 14:10:51,926 INFO L125 PetriNetUnfolderBase]: For 784970/784976 co-relation queries the response was YES. [2024-06-14 14:10:52,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44509 conditions, 6163 events. 3639/6163 cut-off events. For 784970/784976 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42774 event pairs, 682 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 44312. Up to 5253 conditions per place. [2024-06-14 14:10:52,024 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 422 selfloop transitions, 195 changer transitions 0/624 dead transitions. [2024-06-14 14:10:52,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 624 transitions, 9151 flow [2024-06-14 14:10:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:10:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:10:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-14 14:10:52,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432900432900433 [2024-06-14 14:10:52,026 INFO L175 Difference]: Start difference. First operand has 433 places, 586 transitions, 7337 flow. Second operand 11 states and 251 transitions. [2024-06-14 14:10:52,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 624 transitions, 9151 flow [2024-06-14 14:10:55,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 624 transitions, 8975 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:10:55,938 INFO L231 Difference]: Finished difference. Result has 434 places, 589 transitions, 7583 flow [2024-06-14 14:10:55,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7161, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7583, PETRI_PLACES=434, PETRI_TRANSITIONS=589} [2024-06-14 14:10:55,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 14:10:55,938 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 589 transitions, 7583 flow [2024-06-14 14:10:55,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:55,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:55,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:55,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:10:55,939 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:55,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash -291835144, now seen corresponding path program 20 times [2024-06-14 14:10:55,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:55,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554364483] [2024-06-14 14:10:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:55,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:56,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:56,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554364483] [2024-06-14 14:10:56,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554364483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:56,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:56,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:56,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462428544] [2024-06-14 14:10:56,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:56,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:56,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:56,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:56,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:56,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 589 transitions, 7583 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:56,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:56,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:56,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:57,444 INFO L124 PetriNetUnfolderBase]: 3636/6165 cut-off events. [2024-06-14 14:10:57,444 INFO L125 PetriNetUnfolderBase]: For 790887/790893 co-relation queries the response was YES. [2024-06-14 14:10:57,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44773 conditions, 6165 events. 3636/6165 cut-off events. For 790887/790893 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42732 event pairs, 666 based on Foata normal form. 5/6165 useless extension candidates. Maximal degree in co-relation 44575. Up to 5459 conditions per place. [2024-06-14 14:10:57,541 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 525 selfloop transitions, 86 changer transitions 0/618 dead transitions. [2024-06-14 14:10:57,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 618 transitions, 8877 flow [2024-06-14 14:10:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-14 14:10:57,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-06-14 14:10:57,542 INFO L175 Difference]: Start difference. First operand has 434 places, 589 transitions, 7583 flow. Second operand 10 states and 229 transitions. [2024-06-14 14:10:57,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 618 transitions, 8877 flow [2024-06-14 14:11:02,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 618 transitions, 8469 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:02,497 INFO L231 Difference]: Finished difference. Result has 435 places, 589 transitions, 7353 flow [2024-06-14 14:11:02,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7175, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7353, PETRI_PLACES=435, PETRI_TRANSITIONS=589} [2024-06-14 14:11:02,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-14 14:11:02,498 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 589 transitions, 7353 flow [2024-06-14 14:11:02,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:02,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:02,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:02,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:11:02,499 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:02,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:02,499 INFO L85 PathProgramCache]: Analyzing trace with hash 144541708, now seen corresponding path program 21 times [2024-06-14 14:11:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:02,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442118860] [2024-06-14 14:11:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:02,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:02,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:02,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442118860] [2024-06-14 14:11:02,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442118860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:02,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:02,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:02,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62492772] [2024-06-14 14:11:02,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:02,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:02,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:02,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:02,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:02,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:02,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 589 transitions, 7353 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:02,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:02,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:02,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:04,069 INFO L124 PetriNetUnfolderBase]: 3633/6155 cut-off events. [2024-06-14 14:11:04,072 INFO L125 PetriNetUnfolderBase]: For 796130/796136 co-relation queries the response was YES. [2024-06-14 14:11:04,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44437 conditions, 6155 events. 3633/6155 cut-off events. For 796130/796136 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 42699 event pairs, 684 based on Foata normal form. 5/6152 useless extension candidates. Maximal degree in co-relation 44238. Up to 5247 conditions per place. [2024-06-14 14:11:04,161 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 410 selfloop transitions, 199 changer transitions 0/616 dead transitions. [2024-06-14 14:11:04,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 616 transitions, 8875 flow [2024-06-14 14:11:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:11:04,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:11:04,176 INFO L175 Difference]: Start difference. First operand has 435 places, 589 transitions, 7353 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:11:04,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 616 transitions, 8875 flow [2024-06-14 14:11:07,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 616 transitions, 8703 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:07,885 INFO L231 Difference]: Finished difference. Result has 436 places, 589 transitions, 7585 flow [2024-06-14 14:11:07,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7585, PETRI_PLACES=436, PETRI_TRANSITIONS=589} [2024-06-14 14:11:07,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-14 14:11:07,886 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 589 transitions, 7585 flow [2024-06-14 14:11:07,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:07,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:07,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:07,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:11:07,907 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:07,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:07,907 INFO L85 PathProgramCache]: Analyzing trace with hash 56670884, now seen corresponding path program 13 times [2024-06-14 14:11:07,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:07,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585843967] [2024-06-14 14:11:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:07,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:08,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585843967] [2024-06-14 14:11:08,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585843967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:08,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:08,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:08,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057664950] [2024-06-14 14:11:08,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:08,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:08,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:08,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:08,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 589 transitions, 7585 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:08,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:08,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:08,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:09,580 INFO L124 PetriNetUnfolderBase]: 3638/6159 cut-off events. [2024-06-14 14:11:09,580 INFO L125 PetriNetUnfolderBase]: For 808175/808175 co-relation queries the response was YES. [2024-06-14 14:11:09,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44884 conditions, 6159 events. 3638/6159 cut-off events. For 808175/808175 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42695 event pairs, 677 based on Foata normal form. 1/6153 useless extension candidates. Maximal degree in co-relation 44684. Up to 5455 conditions per place. [2024-06-14 14:11:09,675 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 504 selfloop transitions, 103 changer transitions 0/614 dead transitions. [2024-06-14 14:11:09,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 614 transitions, 9129 flow [2024-06-14 14:11:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 14:11:09,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173160173160173 [2024-06-14 14:11:09,676 INFO L175 Difference]: Start difference. First operand has 436 places, 589 transitions, 7585 flow. Second operand 11 states and 239 transitions. [2024-06-14 14:11:09,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 614 transitions, 9129 flow [2024-06-14 14:11:13,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 614 transitions, 8756 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:13,671 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 7468 flow [2024-06-14 14:11:13,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7212, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7468, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-14 14:11:13,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 14:11:13,672 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 7468 flow [2024-06-14 14:11:13,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:13,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:13,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:13,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 14:11:13,673 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:13,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1016739006, now seen corresponding path program 22 times [2024-06-14 14:11:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:13,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648268076] [2024-06-14 14:11:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648268076] [2024-06-14 14:11:13,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648268076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:13,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:13,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138127060] [2024-06-14 14:11:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:13,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:13,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:13,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:13,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:13,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:13,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 7468 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:13,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:13,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:13,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:15,253 INFO L124 PetriNetUnfolderBase]: 3635/6166 cut-off events. [2024-06-14 14:11:15,253 INFO L125 PetriNetUnfolderBase]: For 813871/813877 co-relation queries the response was YES. [2024-06-14 14:11:15,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44541 conditions, 6166 events. 3635/6166 cut-off events. For 813871/813877 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42774 event pairs, 666 based on Foata normal form. 5/6166 useless extension candidates. Maximal degree in co-relation 44341. Up to 5296 conditions per place. [2024-06-14 14:11:15,348 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 465 selfloop transitions, 164 changer transitions 0/636 dead transitions. [2024-06-14 14:11:15,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 636 transitions, 9562 flow [2024-06-14 14:11:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-14 14:11:15,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-14 14:11:15,350 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 7468 flow. Second operand 10 states and 249 transitions. [2024-06-14 14:11:15,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 636 transitions, 9562 flow [2024-06-14 14:11:20,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 636 transitions, 9256 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:20,385 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 7505 flow [2024-06-14 14:11:20,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7162, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7505, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-14 14:11:20,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 14:11:20,386 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 7505 flow [2024-06-14 14:11:20,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:20,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:20,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:20,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 14:11:20,386 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:20,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash -115104022, now seen corresponding path program 23 times [2024-06-14 14:11:20,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:20,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578085101] [2024-06-14 14:11:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:20,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:20,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:20,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578085101] [2024-06-14 14:11:20,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578085101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:20,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:20,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:20,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946500980] [2024-06-14 14:11:20,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:20,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:20,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:20,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:20,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:20,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 7505 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:20,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:20,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:20,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:21,898 INFO L124 PetriNetUnfolderBase]: 3632/6156 cut-off events. [2024-06-14 14:11:21,899 INFO L125 PetriNetUnfolderBase]: For 820388/820394 co-relation queries the response was YES. [2024-06-14 14:11:21,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44667 conditions, 6156 events. 3632/6156 cut-off events. For 820388/820394 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 42726 event pairs, 682 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 44466. Up to 5293 conditions per place. [2024-06-14 14:11:22,001 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 461 selfloop transitions, 151 changer transitions 0/619 dead transitions. [2024-06-14 14:11:22,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 619 transitions, 9041 flow [2024-06-14 14:11:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:11:22,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:11:22,002 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 7505 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:11:22,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 619 transitions, 9041 flow [2024-06-14 14:11:27,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 619 transitions, 8623 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:27,156 INFO L231 Difference]: Finished difference. Result has 434 places, 592 transitions, 7404 flow [2024-06-14 14:11:27,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7091, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7404, PETRI_PLACES=434, PETRI_TRANSITIONS=592} [2024-06-14 14:11:27,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 14:11:27,157 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 592 transitions, 7404 flow [2024-06-14 14:11:27,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:27,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:27,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:27,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 14:11:27,157 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:27,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:27,158 INFO L85 PathProgramCache]: Analyzing trace with hash -371811922, now seen corresponding path program 24 times [2024-06-14 14:11:27,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:27,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272189172] [2024-06-14 14:11:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:27,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:27,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:27,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272189172] [2024-06-14 14:11:27,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272189172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:27,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:27,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375006676] [2024-06-14 14:11:27,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:27,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:27,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 592 transitions, 7404 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:27,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:27,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:27,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:28,652 INFO L124 PetriNetUnfolderBase]: 3629/6158 cut-off events. [2024-06-14 14:11:28,652 INFO L125 PetriNetUnfolderBase]: For 799484/799490 co-relation queries the response was YES. [2024-06-14 14:11:28,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44333 conditions, 6158 events. 3629/6158 cut-off events. For 799484/799490 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42755 event pairs, 666 based on Foata normal form. 5/6158 useless extension candidates. Maximal degree in co-relation 44133. Up to 5290 conditions per place. [2024-06-14 14:11:28,751 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 167 changer transitions 0/634 dead transitions. [2024-06-14 14:11:28,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 634 transitions, 9006 flow [2024-06-14 14:11:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:11:28,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:11:28,753 INFO L175 Difference]: Start difference. First operand has 434 places, 592 transitions, 7404 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:11:28,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 634 transitions, 9006 flow [2024-06-14 14:11:33,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 634 transitions, 8586 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:33,687 INFO L231 Difference]: Finished difference. Result has 435 places, 592 transitions, 7338 flow [2024-06-14 14:11:33,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6986, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7338, PETRI_PLACES=435, PETRI_TRANSITIONS=592} [2024-06-14 14:11:33,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-14 14:11:33,687 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 592 transitions, 7338 flow [2024-06-14 14:11:33,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:33,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:33,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:33,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:11:33,688 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:33,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1982507884, now seen corresponding path program 14 times [2024-06-14 14:11:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:33,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492279201] [2024-06-14 14:11:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:33,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:33,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:33,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492279201] [2024-06-14 14:11:33,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492279201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:33,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:33,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015404204] [2024-06-14 14:11:33,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:33,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:33,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 592 transitions, 7338 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:33,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:33,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:33,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:35,345 INFO L124 PetriNetUnfolderBase]: 3626/6154 cut-off events. [2024-06-14 14:11:35,345 INFO L125 PetriNetUnfolderBase]: For 791802/791808 co-relation queries the response was YES. [2024-06-14 14:11:35,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44176 conditions, 6154 events. 3626/6154 cut-off events. For 791802/791808 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42707 event pairs, 673 based on Foata normal form. 5/6154 useless extension candidates. Maximal degree in co-relation 43976. Up to 5303 conditions per place. [2024-06-14 14:11:35,436 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 438 selfloop transitions, 180 changer transitions 0/625 dead transitions. [2024-06-14 14:11:35,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 625 transitions, 9380 flow [2024-06-14 14:11:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-14 14:11:35,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:11:35,438 INFO L175 Difference]: Start difference. First operand has 435 places, 592 transitions, 7338 flow. Second operand 11 states and 253 transitions. [2024-06-14 14:11:35,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 625 transitions, 9380 flow [2024-06-14 14:11:40,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 625 transitions, 9010 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:40,574 INFO L231 Difference]: Finished difference. Result has 434 places, 592 transitions, 7356 flow [2024-06-14 14:11:40,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6986, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7356, PETRI_PLACES=434, PETRI_TRANSITIONS=592} [2024-06-14 14:11:40,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 14:11:40,575 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 592 transitions, 7356 flow [2024-06-14 14:11:40,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:40,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:40,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:40,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:11:40,575 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:40,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash 938260132, now seen corresponding path program 15 times [2024-06-14 14:11:40,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:40,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531001506] [2024-06-14 14:11:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:40,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:40,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:40,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531001506] [2024-06-14 14:11:40,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531001506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:40,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:40,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:40,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153543896] [2024-06-14 14:11:40,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:40,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:40,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:40,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:40,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 592 transitions, 7356 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:40,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:40,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:40,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:42,099 INFO L124 PetriNetUnfolderBase]: 3631/6161 cut-off events. [2024-06-14 14:11:42,100 INFO L125 PetriNetUnfolderBase]: For 767434/767440 co-relation queries the response was YES. [2024-06-14 14:11:42,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44025 conditions, 6161 events. 3631/6161 cut-off events. For 767434/767440 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42779 event pairs, 675 based on Foata normal form. 5/6161 useless extension candidates. Maximal degree in co-relation 43827. Up to 5309 conditions per place. [2024-06-14 14:11:42,195 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 436 selfloop transitions, 183 changer transitions 0/626 dead transitions. [2024-06-14 14:11:42,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 626 transitions, 9196 flow [2024-06-14 14:11:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-14 14:11:42,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 14:11:42,196 INFO L175 Difference]: Start difference. First operand has 434 places, 592 transitions, 7356 flow. Second operand 10 states and 235 transitions. [2024-06-14 14:11:42,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 626 transitions, 9196 flow [2024-06-14 14:11:46,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 626 transitions, 8813 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:46,271 INFO L231 Difference]: Finished difference. Result has 436 places, 595 transitions, 7403 flow [2024-06-14 14:11:46,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6994, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7403, PETRI_PLACES=436, PETRI_TRANSITIONS=595} [2024-06-14 14:11:46,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-14 14:11:46,272 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 595 transitions, 7403 flow [2024-06-14 14:11:46,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:46,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:46,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:11:46,273 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:46,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash 595585804, now seen corresponding path program 16 times [2024-06-14 14:11:46,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:46,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484314480] [2024-06-14 14:11:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:46,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:46,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484314480] [2024-06-14 14:11:46,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484314480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:46,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:46,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:46,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491282175] [2024-06-14 14:11:46,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:46,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:46,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:46,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:46,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:46,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 595 transitions, 7403 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:46,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:46,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:46,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:47,797 INFO L124 PetriNetUnfolderBase]: 3628/6146 cut-off events. [2024-06-14 14:11:47,798 INFO L125 PetriNetUnfolderBase]: For 759531/759531 co-relation queries the response was YES. [2024-06-14 14:11:47,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43739 conditions, 6146 events. 3628/6146 cut-off events. For 759531/759531 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42595 event pairs, 676 based on Foata normal form. 1/6140 useless extension candidates. Maximal degree in co-relation 43541. Up to 5306 conditions per place. [2024-06-14 14:11:47,892 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 429 selfloop transitions, 187 changer transitions 0/623 dead transitions. [2024-06-14 14:11:47,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 623 transitions, 9179 flow [2024-06-14 14:11:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-14 14:11:47,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:11:47,893 INFO L175 Difference]: Start difference. First operand has 436 places, 595 transitions, 7403 flow. Second operand 10 states and 230 transitions. [2024-06-14 14:11:47,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 623 transitions, 9179 flow [2024-06-14 14:11:51,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 623 transitions, 8882 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:51,594 INFO L231 Difference]: Finished difference. Result has 438 places, 595 transitions, 7494 flow [2024-06-14 14:11:51,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7110, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7494, PETRI_PLACES=438, PETRI_TRANSITIONS=595} [2024-06-14 14:11:51,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-14 14:11:51,594 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 595 transitions, 7494 flow [2024-06-14 14:11:51,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:51,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:51,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:51,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:11:51,595 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:51,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 567124846, now seen corresponding path program 25 times [2024-06-14 14:11:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:51,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788348572] [2024-06-14 14:11:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788348572] [2024-06-14 14:11:51,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788348572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:51,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:51,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:51,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476539405] [2024-06-14 14:11:51,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:51,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:51,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:51,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:51,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 595 transitions, 7494 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:51,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:51,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:51,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:53,158 INFO L124 PetriNetUnfolderBase]: 3625/6153 cut-off events. [2024-06-14 14:11:53,159 INFO L125 PetriNetUnfolderBase]: For 753642/753648 co-relation queries the response was YES. [2024-06-14 14:11:53,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43644 conditions, 6153 events. 3625/6153 cut-off events. For 753642/753648 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42711 event pairs, 666 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 43446. Up to 5286 conditions per place. [2024-06-14 14:11:53,254 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 167 changer transitions 0/640 dead transitions. [2024-06-14 14:11:53,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 640 transitions, 8874 flow [2024-06-14 14:11:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-14 14:11:53,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-14 14:11:53,256 INFO L175 Difference]: Start difference. First operand has 438 places, 595 transitions, 7494 flow. Second operand 11 states and 266 transitions. [2024-06-14 14:11:53,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 640 transitions, 8874 flow [2024-06-14 14:11:57,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 640 transitions, 8456 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:57,474 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 7432 flow [2024-06-14 14:11:57,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7076, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7432, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-14 14:11:57,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-14 14:11:57,475 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 7432 flow [2024-06-14 14:11:57,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:57,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:57,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:57,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:11:57,476 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:57,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash 567362182, now seen corresponding path program 17 times [2024-06-14 14:11:57,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:57,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866417191] [2024-06-14 14:11:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:57,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:57,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:57,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866417191] [2024-06-14 14:11:57,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866417191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:57,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:57,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:57,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991898554] [2024-06-14 14:11:57,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:57,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:57,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:57,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:57,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:57,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:57,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 7432 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:57,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:57,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:57,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:58,995 INFO L124 PetriNetUnfolderBase]: 3622/6149 cut-off events. [2024-06-14 14:11:58,995 INFO L125 PetriNetUnfolderBase]: For 746541/746547 co-relation queries the response was YES. [2024-06-14 14:11:59,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43482 conditions, 6149 events. 3622/6149 cut-off events. For 746541/746547 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42664 event pairs, 675 based on Foata normal form. 5/6149 useless extension candidates. Maximal degree in co-relation 43283. Up to 5299 conditions per place. [2024-06-14 14:11:59,086 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 436 selfloop transitions, 180 changer transitions 0/623 dead transitions. [2024-06-14 14:11:59,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 623 transitions, 8972 flow [2024-06-14 14:11:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:11:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:11:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:11:59,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:11:59,087 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 7432 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:11:59,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 623 transitions, 8972 flow [2024-06-14 14:12:03,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 623 transitions, 8612 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-14 14:12:03,437 INFO L231 Difference]: Finished difference. Result has 437 places, 595 transitions, 7454 flow [2024-06-14 14:12:03,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7454, PETRI_PLACES=437, PETRI_TRANSITIONS=595} [2024-06-14 14:12:03,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 14:12:03,437 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 595 transitions, 7454 flow [2024-06-14 14:12:03,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:03,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:03,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:12:03,438 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:03,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1606611184, now seen corresponding path program 18 times [2024-06-14 14:12:03,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:03,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684151317] [2024-06-14 14:12:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:03,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:03,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684151317] [2024-06-14 14:12:03,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684151317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:03,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:03,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:03,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307398660] [2024-06-14 14:12:03,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:03,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:03,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 595 transitions, 7454 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:03,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:03,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:03,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:05,107 INFO L124 PetriNetUnfolderBase]: 3619/6145 cut-off events. [2024-06-14 14:12:05,107 INFO L125 PetriNetUnfolderBase]: For 705086/705092 co-relation queries the response was YES. [2024-06-14 14:12:05,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43061 conditions, 6145 events. 3619/6145 cut-off events. For 705086/705092 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42671 event pairs, 675 based on Foata normal form. 5/6145 useless extension candidates. Maximal degree in co-relation 42862. Up to 5296 conditions per place. [2024-06-14 14:12:05,188 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 439 selfloop transitions, 181 changer transitions 0/627 dead transitions. [2024-06-14 14:12:05,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 627 transitions, 9238 flow [2024-06-14 14:12:05,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:12:05,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-14 14:12:05,189 INFO L175 Difference]: Start difference. First operand has 437 places, 595 transitions, 7454 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:12:05,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 627 transitions, 9238 flow [2024-06-14 14:12:08,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 627 transitions, 8761 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 14:12:08,832 INFO L231 Difference]: Finished difference. Result has 435 places, 595 transitions, 7365 flow [2024-06-14 14:12:08,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6985, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7365, PETRI_PLACES=435, PETRI_TRANSITIONS=595} [2024-06-14 14:12:08,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-14 14:12:08,833 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 595 transitions, 7365 flow [2024-06-14 14:12:08,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:08,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:08,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:08,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:12:08,833 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:08,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:08,833 INFO L85 PathProgramCache]: Analyzing trace with hash 27061186, now seen corresponding path program 19 times [2024-06-14 14:12:08,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:08,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255767449] [2024-06-14 14:12:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:08,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:09,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:09,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255767449] [2024-06-14 14:12:09,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255767449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:09,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:09,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914851149] [2024-06-14 14:12:09,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:09,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:09,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 595 transitions, 7365 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:09,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:09,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:09,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:10,291 INFO L124 PetriNetUnfolderBase]: 3616/6139 cut-off events. [2024-06-14 14:12:10,291 INFO L125 PetriNetUnfolderBase]: For 684532/684532 co-relation queries the response was YES. [2024-06-14 14:12:10,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42784 conditions, 6139 events. 3616/6139 cut-off events. For 684532/684532 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42631 event pairs, 654 based on Foata normal form. 1/6137 useless extension candidates. Maximal degree in co-relation 42586. Up to 5417 conditions per place. [2024-06-14 14:12:10,386 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 89 changer transitions 0/618 dead transitions. [2024-06-14 14:12:10,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 618 transitions, 8875 flow [2024-06-14 14:12:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:12:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:12:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 14:12:10,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:12:10,388 INFO L175 Difference]: Start difference. First operand has 435 places, 595 transitions, 7365 flow. Second operand 6 states and 156 transitions. [2024-06-14 14:12:10,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 618 transitions, 8875 flow [2024-06-14 14:12:14,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 618 transitions, 8513 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 14:12:14,896 INFO L231 Difference]: Finished difference. Result has 432 places, 595 transitions, 7208 flow [2024-06-14 14:12:14,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7009, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7208, PETRI_PLACES=432, PETRI_TRANSITIONS=595} [2024-06-14 14:12:14,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-14 14:12:14,897 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 595 transitions, 7208 flow [2024-06-14 14:12:14,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:14,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:14,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:14,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:12:14,898 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:14,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash 861435064, now seen corresponding path program 20 times [2024-06-14 14:12:14,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:14,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678099517] [2024-06-14 14:12:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:15,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:15,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678099517] [2024-06-14 14:12:15,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678099517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:15,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:15,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:15,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139934719] [2024-06-14 14:12:15,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:15,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:15,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:15,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:15,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:15,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 595 transitions, 7208 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:15,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:15,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:15,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:16,433 INFO L124 PetriNetUnfolderBase]: 3613/6135 cut-off events. [2024-06-14 14:12:16,433 INFO L125 PetriNetUnfolderBase]: For 655358/655358 co-relation queries the response was YES. [2024-06-14 14:12:16,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42263 conditions, 6135 events. 3613/6135 cut-off events. For 655358/655358 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42576 event pairs, 654 based on Foata normal form. 1/6133 useless extension candidates. Maximal degree in co-relation 42067. Up to 5414 conditions per place. [2024-06-14 14:12:16,527 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 528 selfloop transitions, 89 changer transitions 0/624 dead transitions. [2024-06-14 14:12:16,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 624 transitions, 8516 flow [2024-06-14 14:12:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:12:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:12:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:12:16,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-14 14:12:16,528 INFO L175 Difference]: Start difference. First operand has 432 places, 595 transitions, 7208 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:12:16,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 624 transitions, 8516 flow [2024-06-14 14:12:20,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 624 transitions, 8221 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:12:20,481 INFO L231 Difference]: Finished difference. Result has 432 places, 595 transitions, 7115 flow [2024-06-14 14:12:20,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7115, PETRI_PLACES=432, PETRI_TRANSITIONS=595} [2024-06-14 14:12:20,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-14 14:12:20,482 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 595 transitions, 7115 flow [2024-06-14 14:12:20,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:20,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:20,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:20,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:12:20,483 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:20,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:20,483 INFO L85 PathProgramCache]: Analyzing trace with hash 22296610, now seen corresponding path program 7 times [2024-06-14 14:12:20,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:20,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590410628] [2024-06-14 14:12:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:20,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:20,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:20,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590410628] [2024-06-14 14:12:20,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590410628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:20,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:20,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:20,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572930550] [2024-06-14 14:12:20,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:20,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:20,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:20,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:20,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 595 transitions, 7115 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:20,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:20,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:20,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:22,011 INFO L124 PetriNetUnfolderBase]: 3669/6227 cut-off events. [2024-06-14 14:12:22,011 INFO L125 PetriNetUnfolderBase]: For 754603/754603 co-relation queries the response was YES. [2024-06-14 14:12:22,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42975 conditions, 6227 events. 3669/6227 cut-off events. For 754603/754603 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43257 event pairs, 536 based on Foata normal form. 16/6240 useless extension candidates. Maximal degree in co-relation 42779. Up to 5338 conditions per place. [2024-06-14 14:12:22,108 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 518 selfloop transitions, 105 changer transitions 0/630 dead transitions. [2024-06-14 14:12:22,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 630 transitions, 8525 flow [2024-06-14 14:12:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:12:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:12:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 14:12:22,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-14 14:12:22,109 INFO L175 Difference]: Start difference. First operand has 432 places, 595 transitions, 7115 flow. Second operand 7 states and 184 transitions. [2024-06-14 14:12:22,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 630 transitions, 8525 flow [2024-06-14 14:12:26,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 630 transitions, 8197 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 14:12:26,430 INFO L231 Difference]: Finished difference. Result has 430 places, 597 transitions, 7091 flow [2024-06-14 14:12:26,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7091, PETRI_PLACES=430, PETRI_TRANSITIONS=597} [2024-06-14 14:12:26,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-14 14:12:26,431 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 597 transitions, 7091 flow [2024-06-14 14:12:26,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:26,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:26,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:26,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:12:26,432 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:26,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1977743308, now seen corresponding path program 8 times [2024-06-14 14:12:26,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:26,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98553600] [2024-06-14 14:12:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:26,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:26,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:26,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98553600] [2024-06-14 14:12:26,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98553600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:26,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:26,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:26,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478032706] [2024-06-14 14:12:26,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:26,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:26,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:26,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:26,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:26,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:26,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 597 transitions, 7091 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:26,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:26,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:26,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:28,108 INFO L124 PetriNetUnfolderBase]: 3725/6313 cut-off events. [2024-06-14 14:12:28,109 INFO L125 PetriNetUnfolderBase]: For 762152/762158 co-relation queries the response was YES. [2024-06-14 14:12:28,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43914 conditions, 6313 events. 3725/6313 cut-off events. For 762152/762158 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 43929 event pairs, 691 based on Foata normal form. 20/6328 useless extension candidates. Maximal degree in co-relation 43718. Up to 5338 conditions per place. [2024-06-14 14:12:28,194 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 438 selfloop transitions, 187 changer transitions 0/632 dead transitions. [2024-06-14 14:12:28,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 632 transitions, 8507 flow [2024-06-14 14:12:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-14 14:12:28,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-14 14:12:28,195 INFO L175 Difference]: Start difference. First operand has 430 places, 597 transitions, 7091 flow. Second operand 10 states and 236 transitions. [2024-06-14 14:12:28,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 632 transitions, 8507 flow [2024-06-14 14:12:31,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 632 transitions, 8279 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 14:12:31,848 INFO L231 Difference]: Finished difference. Result has 435 places, 599 transitions, 7321 flow [2024-06-14 14:12:31,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6863, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7321, PETRI_PLACES=435, PETRI_TRANSITIONS=599} [2024-06-14 14:12:31,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-14 14:12:31,849 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 599 transitions, 7321 flow [2024-06-14 14:12:31,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:31,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:31,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:31,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:12:31,850 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:31,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 567359206, now seen corresponding path program 9 times [2024-06-14 14:12:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:31,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543784407] [2024-06-14 14:12:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:31,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:32,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:32,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543784407] [2024-06-14 14:12:32,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543784407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:32,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:32,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:32,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016357654] [2024-06-14 14:12:32,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:32,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:32,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:32,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:32,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 599 transitions, 7321 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:32,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:32,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:32,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:33,427 INFO L124 PetriNetUnfolderBase]: 3768/6386 cut-off events. [2024-06-14 14:12:33,427 INFO L125 PetriNetUnfolderBase]: For 763121/763127 co-relation queries the response was YES. [2024-06-14 14:12:33,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44409 conditions, 6386 events. 3768/6386 cut-off events. For 763121/763127 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44528 event pairs, 700 based on Foata normal form. 20/6401 useless extension candidates. Maximal degree in co-relation 44212. Up to 5343 conditions per place. [2024-06-14 14:12:33,526 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 439 selfloop transitions, 186 changer transitions 0/632 dead transitions. [2024-06-14 14:12:33,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 632 transitions, 8737 flow [2024-06-14 14:12:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:12:33,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 14:12:33,527 INFO L175 Difference]: Start difference. First operand has 435 places, 599 transitions, 7321 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:12:33,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 632 transitions, 8737 flow [2024-06-14 14:12:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 632 transitions, 8315 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 14:12:37,382 INFO L231 Difference]: Finished difference. Result has 435 places, 601 transitions, 7363 flow [2024-06-14 14:12:37,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6903, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7363, PETRI_PLACES=435, PETRI_TRANSITIONS=601} [2024-06-14 14:12:37,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-14 14:12:37,383 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 601 transitions, 7363 flow [2024-06-14 14:12:37,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:37,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:37,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:37,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:12:37,383 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:37,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1606518928, now seen corresponding path program 10 times [2024-06-14 14:12:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:37,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000720615] [2024-06-14 14:12:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:37,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:37,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000720615] [2024-06-14 14:12:37,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000720615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:37,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:37,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125220056] [2024-06-14 14:12:37,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:37,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:37,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:37,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:37,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 601 transitions, 7363 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:37,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:37,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:37,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:38,970 INFO L124 PetriNetUnfolderBase]: 3775/6403 cut-off events. [2024-06-14 14:12:38,970 INFO L125 PetriNetUnfolderBase]: For 694791/694797 co-relation queries the response was YES. [2024-06-14 14:12:39,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43594 conditions, 6403 events. 3775/6403 cut-off events. For 694791/694797 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44639 event pairs, 569 based on Foata normal form. 16/6414 useless extension candidates. Maximal degree in co-relation 43396. Up to 4818 conditions per place. [2024-06-14 14:12:39,071 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 212 changer transitions 0/640 dead transitions. [2024-06-14 14:12:39,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 640 transitions, 9009 flow [2024-06-14 14:12:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 14:12:39,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-14 14:12:39,073 INFO L175 Difference]: Start difference. First operand has 435 places, 601 transitions, 7363 flow. Second operand 8 states and 205 transitions. [2024-06-14 14:12:39,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 640 transitions, 9009 flow [2024-06-14 14:12:42,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 640 transitions, 8587 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:42,824 INFO L231 Difference]: Finished difference. Result has 437 places, 602 transitions, 7419 flow [2024-06-14 14:12:42,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7419, PETRI_PLACES=437, PETRI_TRANSITIONS=602} [2024-06-14 14:12:42,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 14:12:42,824 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 602 transitions, 7419 flow [2024-06-14 14:12:42,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:42,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:42,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:42,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:12:42,825 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:42,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:42,825 INFO L85 PathProgramCache]: Analyzing trace with hash 874776472, now seen corresponding path program 2 times [2024-06-14 14:12:42,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:42,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181062316] [2024-06-14 14:12:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:42,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:43,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:43,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181062316] [2024-06-14 14:12:43,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181062316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:43,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:43,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:43,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736945344] [2024-06-14 14:12:43,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:43,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:43,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:43,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:43,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:43,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:43,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 602 transitions, 7419 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:43,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:43,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:43,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:44,386 INFO L124 PetriNetUnfolderBase]: 3815/6471 cut-off events. [2024-06-14 14:12:44,386 INFO L125 PetriNetUnfolderBase]: For 682659/682659 co-relation queries the response was YES. [2024-06-14 14:12:44,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43972 conditions, 6471 events. 3815/6471 cut-off events. For 682659/682659 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 45205 event pairs, 544 based on Foata normal form. 12/6480 useless extension candidates. Maximal degree in co-relation 43773. Up to 5512 conditions per place. [2024-06-14 14:12:44,489 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 105 changer transitions 0/634 dead transitions. [2024-06-14 14:12:44,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 634 transitions, 8827 flow [2024-06-14 14:12:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:12:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:12:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:12:44,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 14:12:44,490 INFO L175 Difference]: Start difference. First operand has 437 places, 602 transitions, 7419 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:12:44,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 634 transitions, 8827 flow [2024-06-14 14:12:48,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 634 transitions, 8417 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:48,370 INFO L231 Difference]: Finished difference. Result has 438 places, 604 transitions, 7286 flow [2024-06-14 14:12:48,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7009, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7286, PETRI_PLACES=438, PETRI_TRANSITIONS=604} [2024-06-14 14:12:48,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-14 14:12:48,371 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 604 transitions, 7286 flow [2024-06-14 14:12:48,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:48,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:48,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:48,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:12:48,371 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:48,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:48,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1991087692, now seen corresponding path program 3 times [2024-06-14 14:12:48,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:48,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863757375] [2024-06-14 14:12:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:48,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:48,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863757375] [2024-06-14 14:12:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863757375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:48,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:48,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:48,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429494133] [2024-06-14 14:12:48,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:48,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:48,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:48,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:48,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:48,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 604 transitions, 7286 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:48,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:48,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:48,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:50,071 INFO L124 PetriNetUnfolderBase]: 3855/6547 cut-off events. [2024-06-14 14:12:50,072 INFO L125 PetriNetUnfolderBase]: For 684704/684710 co-relation queries the response was YES. [2024-06-14 14:12:50,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43948 conditions, 6547 events. 3855/6547 cut-off events. For 684704/684710 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 45837 event pairs, 697 based on Foata normal form. 16/6558 useless extension candidates. Maximal degree in co-relation 43749. Up to 5236 conditions per place. [2024-06-14 14:12:50,166 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 432 selfloop transitions, 203 changer transitions 0/642 dead transitions. [2024-06-14 14:12:50,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 642 transitions, 8728 flow [2024-06-14 14:12:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 14:12:50,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 14:12:50,167 INFO L175 Difference]: Start difference. First operand has 438 places, 604 transitions, 7286 flow. Second operand 10 states and 238 transitions. [2024-06-14 14:12:50,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 642 transitions, 8728 flow [2024-06-14 14:12:53,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 642 transitions, 8473 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 14:12:53,743 INFO L231 Difference]: Finished difference. Result has 443 places, 606 transitions, 7511 flow [2024-06-14 14:12:53,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7511, PETRI_PLACES=443, PETRI_TRANSITIONS=606} [2024-06-14 14:12:53,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-14 14:12:53,744 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 606 transitions, 7511 flow [2024-06-14 14:12:53,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:53,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:53,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:53,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:12:53,744 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:53,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1793611426, now seen corresponding path program 4 times [2024-06-14 14:12:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:53,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206740143] [2024-06-14 14:12:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:54,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:54,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206740143] [2024-06-14 14:12:54,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206740143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:54,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:54,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:54,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857818624] [2024-06-14 14:12:54,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:54,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:54,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:54,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:54,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 606 transitions, 7511 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:54,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:54,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:54,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:55,599 INFO L124 PetriNetUnfolderBase]: 3908/6632 cut-off events. [2024-06-14 14:12:55,599 INFO L125 PetriNetUnfolderBase]: For 711943/711943 co-relation queries the response was YES. [2024-06-14 14:12:55,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45163 conditions, 6632 events. 3908/6632 cut-off events. For 711943/711943 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46524 event pairs, 513 based on Foata normal form. 12/6641 useless extension candidates. Maximal degree in co-relation 44963. Up to 5338 conditions per place. [2024-06-14 14:12:55,690 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 527 selfloop transitions, 103 changer transitions 0/637 dead transitions. [2024-06-14 14:12:55,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 637 transitions, 9163 flow [2024-06-14 14:12:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:12:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:12:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:12:55,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 14:12:55,692 INFO L175 Difference]: Start difference. First operand has 443 places, 606 transitions, 7511 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:12:55,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 637 transitions, 9163 flow [2024-06-14 14:12:59,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 637 transitions, 8703 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 14:12:59,835 INFO L231 Difference]: Finished difference. Result has 442 places, 608 transitions, 7338 flow [2024-06-14 14:12:59,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7338, PETRI_PLACES=442, PETRI_TRANSITIONS=608} [2024-06-14 14:12:59,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-14 14:12:59,836 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 608 transitions, 7338 flow [2024-06-14 14:12:59,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:59,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:59,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:59,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:12:59,837 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:59,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:59,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2082397836, now seen corresponding path program 1 times [2024-06-14 14:12:59,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:59,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34986116] [2024-06-14 14:12:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:59,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:00,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:00,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34986116] [2024-06-14 14:13:00,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34986116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:00,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:00,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:00,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861622757] [2024-06-14 14:13:00,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:00,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:00,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:00,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:00,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:00,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:00,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 608 transitions, 7338 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:00,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:00,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:00,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:01,370 INFO L124 PetriNetUnfolderBase]: 3942/6679 cut-off events. [2024-06-14 14:13:01,371 INFO L125 PetriNetUnfolderBase]: For 672307/672313 co-relation queries the response was YES. [2024-06-14 14:13:01,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45569 conditions, 6679 events. 3942/6679 cut-off events. For 672307/672313 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46889 event pairs, 735 based on Foata normal form. 2/6672 useless extension candidates. Maximal degree in co-relation 45368. Up to 5916 conditions per place. [2024-06-14 14:13:01,478 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 551 selfloop transitions, 82 changer transitions 0/640 dead transitions. [2024-06-14 14:13:01,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 640 transitions, 9070 flow [2024-06-14 14:13:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:13:01,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 14:13:01,480 INFO L175 Difference]: Start difference. First operand has 442 places, 608 transitions, 7338 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:13:01,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 640 transitions, 9070 flow [2024-06-14 14:13:06,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 640 transitions, 8933 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 14:13:06,197 INFO L231 Difference]: Finished difference. Result has 447 places, 614 transitions, 7563 flow [2024-06-14 14:13:06,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7201, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7563, PETRI_PLACES=447, PETRI_TRANSITIONS=614} [2024-06-14 14:13:06,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-14 14:13:06,198 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 614 transitions, 7563 flow [2024-06-14 14:13:06,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:06,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:06,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:06,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:13:06,198 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:06,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1883390644, now seen corresponding path program 2 times [2024-06-14 14:13:06,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:06,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205793805] [2024-06-14 14:13:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:06,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:06,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205793805] [2024-06-14 14:13:06,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205793805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:06,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:06,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:06,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299827969] [2024-06-14 14:13:06,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:06,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:06,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:06,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:06,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 614 transitions, 7563 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:06,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:06,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:06,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:07,775 INFO L124 PetriNetUnfolderBase]: 3950/6698 cut-off events. [2024-06-14 14:13:07,776 INFO L125 PetriNetUnfolderBase]: For 682356/682362 co-relation queries the response was YES. [2024-06-14 14:13:07,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45878 conditions, 6698 events. 3950/6698 cut-off events. For 682356/682362 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 47103 event pairs, 746 based on Foata normal form. 2/6693 useless extension candidates. Maximal degree in co-relation 45674. Up to 5970 conditions per place. [2024-06-14 14:13:07,880 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 553 selfloop transitions, 77 changer transitions 0/637 dead transitions. [2024-06-14 14:13:07,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 637 transitions, 8943 flow [2024-06-14 14:13:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:13:07,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-14 14:13:07,882 INFO L175 Difference]: Start difference. First operand has 447 places, 614 transitions, 7563 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:13:07,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 637 transitions, 8943 flow [2024-06-14 14:13:12,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 637 transitions, 8717 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-14 14:13:12,027 INFO L231 Difference]: Finished difference. Result has 451 places, 616 transitions, 7568 flow [2024-06-14 14:13:12,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7365, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7568, PETRI_PLACES=451, PETRI_TRANSITIONS=616} [2024-06-14 14:13:12,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-14 14:13:12,028 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 616 transitions, 7568 flow [2024-06-14 14:13:12,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:12,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:12,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:12,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:13:12,028 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:12,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1050519324, now seen corresponding path program 3 times [2024-06-14 14:13:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:12,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35136575] [2024-06-14 14:13:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:12,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:12,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35136575] [2024-06-14 14:13:12,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35136575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:12,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:12,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:12,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683411074] [2024-06-14 14:13:12,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:12,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:12,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:12,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:12,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 616 transitions, 7568 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:12,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:12,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:12,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:13,627 INFO L124 PetriNetUnfolderBase]: 3984/6743 cut-off events. [2024-06-14 14:13:13,628 INFO L125 PetriNetUnfolderBase]: For 698317/698323 co-relation queries the response was YES. [2024-06-14 14:13:13,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46699 conditions, 6743 events. 3984/6743 cut-off events. For 698317/698323 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 47431 event pairs, 744 based on Foata normal form. 6/6741 useless extension candidates. Maximal degree in co-relation 46493. Up to 5978 conditions per place. [2024-06-14 14:13:13,739 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 560 selfloop transitions, 78 changer transitions 0/645 dead transitions. [2024-06-14 14:13:13,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 645 transitions, 9314 flow [2024-06-14 14:13:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:13:13,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-14 14:13:13,740 INFO L175 Difference]: Start difference. First operand has 451 places, 616 transitions, 7568 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:13:13,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 645 transitions, 9314 flow [2024-06-14 14:13:17,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 645 transitions, 9133 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:13:17,898 INFO L231 Difference]: Finished difference. Result has 454 places, 622 transitions, 7753 flow [2024-06-14 14:13:17,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7753, PETRI_PLACES=454, PETRI_TRANSITIONS=622} [2024-06-14 14:13:17,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-14 14:13:17,898 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 622 transitions, 7753 flow [2024-06-14 14:13:17,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:17,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:17,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:17,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:13:17,899 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:17,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:17,899 INFO L85 PathProgramCache]: Analyzing trace with hash 852961804, now seen corresponding path program 4 times [2024-06-14 14:13:17,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:17,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511214844] [2024-06-14 14:13:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:17,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:18,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:18,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511214844] [2024-06-14 14:13:18,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511214844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:18,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:18,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:18,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590309772] [2024-06-14 14:13:18,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:18,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:18,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:18,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:18,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:18,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:18,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 622 transitions, 7753 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:18,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:18,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:18,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:19,571 INFO L124 PetriNetUnfolderBase]: 3992/6766 cut-off events. [2024-06-14 14:13:19,572 INFO L125 PetriNetUnfolderBase]: For 710862/710868 co-relation queries the response was YES. [2024-06-14 14:13:19,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47035 conditions, 6766 events. 3992/6766 cut-off events. For 710862/710868 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 47606 event pairs, 735 based on Foata normal form. 6/6767 useless extension candidates. Maximal degree in co-relation 46827. Up to 6110 conditions per place. [2024-06-14 14:13:19,673 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 597 selfloop transitions, 38 changer transitions 0/642 dead transitions. [2024-06-14 14:13:19,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 642 transitions, 9111 flow [2024-06-14 14:13:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 14:13:19,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:13:19,674 INFO L175 Difference]: Start difference. First operand has 454 places, 622 transitions, 7753 flow. Second operand 7 states and 161 transitions. [2024-06-14 14:13:19,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 642 transitions, 9111 flow [2024-06-14 14:13:25,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 642 transitions, 8913 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-14 14:13:25,080 INFO L231 Difference]: Finished difference. Result has 458 places, 624 transitions, 7684 flow [2024-06-14 14:13:25,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7684, PETRI_PLACES=458, PETRI_TRANSITIONS=624} [2024-06-14 14:13:25,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-14 14:13:25,081 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 624 transitions, 7684 flow [2024-06-14 14:13:25,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:25,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:25,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:25,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:13:25,081 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:25,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:25,082 INFO L85 PathProgramCache]: Analyzing trace with hash -199536406, now seen corresponding path program 5 times [2024-06-14 14:13:25,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:25,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630651008] [2024-06-14 14:13:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:25,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:25,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:25,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630651008] [2024-06-14 14:13:25,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630651008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:25,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:25,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:25,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093568483] [2024-06-14 14:13:25,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:25,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:25,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:25,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:25,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:25,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 624 transitions, 7684 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:25,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:25,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:25,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:26,802 INFO L124 PetriNetUnfolderBase]: 4000/6772 cut-off events. [2024-06-14 14:13:26,802 INFO L125 PetriNetUnfolderBase]: For 720872/720878 co-relation queries the response was YES. [2024-06-14 14:13:26,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47053 conditions, 6772 events. 4000/6772 cut-off events. For 720872/720878 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 47664 event pairs, 751 based on Foata normal form. 6/6770 useless extension candidates. Maximal degree in co-relation 46843. Up to 6044 conditions per place. [2024-06-14 14:13:26,903 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 564 selfloop transitions, 73 changer transitions 0/644 dead transitions. [2024-06-14 14:13:26,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 644 transitions, 9042 flow [2024-06-14 14:13:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 14:13:26,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:13:26,904 INFO L175 Difference]: Start difference. First operand has 458 places, 624 transitions, 7684 flow. Second operand 7 states and 161 transitions. [2024-06-14 14:13:26,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 644 transitions, 9042 flow [2024-06-14 14:13:30,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 644 transitions, 8935 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 14:13:30,445 INFO L231 Difference]: Finished difference. Result has 460 places, 626 transitions, 7772 flow [2024-06-14 14:13:30,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7577, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7772, PETRI_PLACES=460, PETRI_TRANSITIONS=626} [2024-06-14 14:13:30,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-14 14:13:30,446 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 626 transitions, 7772 flow [2024-06-14 14:13:30,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:30,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:30,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:30,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:13:30,446 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:30,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:30,446 INFO L85 PathProgramCache]: Analyzing trace with hash 842766450, now seen corresponding path program 6 times [2024-06-14 14:13:30,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:30,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021551307] [2024-06-14 14:13:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:30,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:30,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:30,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021551307] [2024-06-14 14:13:30,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021551307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:30,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:30,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:30,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176040391] [2024-06-14 14:13:30,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:30,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:30,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:30,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:30,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 626 transitions, 7772 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:30,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:30,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:30,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:32,277 INFO L124 PetriNetUnfolderBase]: 4008/6806 cut-off events. [2024-06-14 14:13:32,277 INFO L125 PetriNetUnfolderBase]: For 733330/733336 co-relation queries the response was YES. [2024-06-14 14:13:32,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47377 conditions, 6806 events. 4008/6806 cut-off events. For 733330/733336 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 47949 event pairs, 629 based on Foata normal form. 6/6804 useless extension candidates. Maximal degree in co-relation 47166. Up to 5799 conditions per place. [2024-06-14 14:13:32,373 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 539 selfloop transitions, 110 changer transitions 0/656 dead transitions. [2024-06-14 14:13:32,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 656 transitions, 9779 flow [2024-06-14 14:13:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:13:32,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:13:32,374 INFO L175 Difference]: Start difference. First operand has 460 places, 626 transitions, 7772 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:13:32,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 656 transitions, 9779 flow [2024-06-14 14:13:36,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 656 transitions, 9606 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:13:36,465 INFO L231 Difference]: Finished difference. Result has 463 places, 631 transitions, 8022 flow [2024-06-14 14:13:36,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7599, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8022, PETRI_PLACES=463, PETRI_TRANSITIONS=631} [2024-06-14 14:13:36,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-14 14:13:36,466 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 631 transitions, 8022 flow [2024-06-14 14:13:36,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:36,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:36,466 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] [2024-06-14 14:13:36,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 14:13:36,466 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:36,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:36,467 INFO L85 PathProgramCache]: Analyzing trace with hash 371847402, now seen corresponding path program 7 times [2024-06-14 14:13:36,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:36,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508652301] [2024-06-14 14:13:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:36,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:36,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:36,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508652301] [2024-06-14 14:13:36,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508652301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:36,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:36,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:36,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462266005] [2024-06-14 14:13:36,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:36,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:36,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:36,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:36,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:36,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 631 transitions, 8022 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:36,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:36,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:36,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:38,137 INFO L124 PetriNetUnfolderBase]: 4016/6817 cut-off events. [2024-06-14 14:13:38,138 INFO L125 PetriNetUnfolderBase]: For 747942/747948 co-relation queries the response was YES. [2024-06-14 14:13:38,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47938 conditions, 6817 events. 4016/6817 cut-off events. For 747942/747948 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 48093 event pairs, 632 based on Foata normal form. 6/6815 useless extension candidates. Maximal degree in co-relation 47725. Up to 5807 conditions per place. [2024-06-14 14:13:38,253 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 536 selfloop transitions, 111 changer transitions 0/654 dead transitions. [2024-06-14 14:13:38,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 654 transitions, 9678 flow [2024-06-14 14:13:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 14:13:38,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-14 14:13:38,255 INFO L175 Difference]: Start difference. First operand has 463 places, 631 transitions, 8022 flow. Second operand 7 states and 164 transitions. [2024-06-14 14:13:38,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 654 transitions, 9678 flow [2024-06-14 14:13:42,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 654 transitions, 9255 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-14 14:13:42,661 INFO L231 Difference]: Finished difference. Result has 465 places, 633 transitions, 7902 flow [2024-06-14 14:13:42,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7635, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7902, PETRI_PLACES=465, PETRI_TRANSITIONS=633} [2024-06-14 14:13:42,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-14 14:13:42,661 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 633 transitions, 7902 flow [2024-06-14 14:13:42,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:42,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:42,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:42,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 14:13:42,662 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:42,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1177581334, now seen corresponding path program 8 times [2024-06-14 14:13:42,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:42,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310380958] [2024-06-14 14:13:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:42,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:42,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:42,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310380958] [2024-06-14 14:13:42,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310380958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:42,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:42,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:42,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067291771] [2024-06-14 14:13:42,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:42,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:42,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:42,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:42,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:42,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 633 transitions, 7902 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:42,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:42,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:42,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:44,332 INFO L124 PetriNetUnfolderBase]: 4037/6843 cut-off events. [2024-06-14 14:13:44,332 INFO L125 PetriNetUnfolderBase]: For 769623/769629 co-relation queries the response was YES. [2024-06-14 14:13:44,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48003 conditions, 6843 events. 4037/6843 cut-off events. For 769623/769629 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48364 event pairs, 752 based on Foata normal form. 6/6837 useless extension candidates. Maximal degree in co-relation 47790. Up to 6064 conditions per place. [2024-06-14 14:13:44,449 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 567 selfloop transitions, 80 changer transitions 0/654 dead transitions. [2024-06-14 14:13:44,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 654 transitions, 9566 flow [2024-06-14 14:13:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 14:13:44,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-14 14:13:44,450 INFO L175 Difference]: Start difference. First operand has 465 places, 633 transitions, 7902 flow. Second operand 7 states and 160 transitions. [2024-06-14 14:13:44,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 654 transitions, 9566 flow [2024-06-14 14:13:48,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 654 transitions, 9362 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 14:13:48,371 INFO L231 Difference]: Finished difference. Result has 469 places, 637 transitions, 7976 flow [2024-06-14 14:13:48,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7702, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7976, PETRI_PLACES=469, PETRI_TRANSITIONS=637} [2024-06-14 14:13:48,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-14 14:13:48,372 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 637 transitions, 7976 flow [2024-06-14 14:13:48,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:48,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:48,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:48,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 14:13:48,372 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:48,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:48,372 INFO L85 PathProgramCache]: Analyzing trace with hash 931421490, now seen corresponding path program 9 times [2024-06-14 14:13:48,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:48,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668033064] [2024-06-14 14:13:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:48,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:48,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:48,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668033064] [2024-06-14 14:13:48,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668033064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:48,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:48,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353446383] [2024-06-14 14:13:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:48,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:48,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:48,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:48,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:48,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 637 transitions, 7976 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:48,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:48,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:48,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:50,282 INFO L124 PetriNetUnfolderBase]: 4032/6840 cut-off events. [2024-06-14 14:13:50,282 INFO L125 PetriNetUnfolderBase]: For 767264/767270 co-relation queries the response was YES. [2024-06-14 14:13:50,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47666 conditions, 6840 events. 4032/6840 cut-off events. For 767264/767270 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48335 event pairs, 757 based on Foata normal form. 6/6838 useless extension candidates. Maximal degree in co-relation 47451. Up to 6092 conditions per place. [2024-06-14 14:13:50,561 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 573 selfloop transitions, 72 changer transitions 0/652 dead transitions. [2024-06-14 14:13:50,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 652 transitions, 9302 flow [2024-06-14 14:13:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 14:13:50,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-14 14:13:50,562 INFO L175 Difference]: Start difference. First operand has 469 places, 637 transitions, 7976 flow. Second operand 7 states and 158 transitions. [2024-06-14 14:13:50,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 652 transitions, 9302 flow [2024-06-14 14:13:54,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 652 transitions, 9098 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 14:13:54,634 INFO L231 Difference]: Finished difference. Result has 472 places, 637 transitions, 7921 flow [2024-06-14 14:13:54,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7921, PETRI_PLACES=472, PETRI_TRANSITIONS=637} [2024-06-14 14:13:54,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-14 14:13:54,635 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 637 transitions, 7921 flow [2024-06-14 14:13:54,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:54,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:54,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:54,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 14:13:54,635 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:54,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:54,635 INFO L85 PathProgramCache]: Analyzing trace with hash -115096086, now seen corresponding path program 10 times [2024-06-14 14:13:54,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:54,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855087431] [2024-06-14 14:13:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:54,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:54,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:54,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855087431] [2024-06-14 14:13:54,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855087431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:54,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:54,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:54,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588081008] [2024-06-14 14:13:54,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:54,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:54,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:54,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:54,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:54,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:54,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 637 transitions, 7921 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:54,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:54,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:54,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:56,795 INFO L124 PetriNetUnfolderBase]: 4022/6821 cut-off events. [2024-06-14 14:13:56,796 INFO L125 PetriNetUnfolderBase]: For 763519/763525 co-relation queries the response was YES. [2024-06-14 14:13:56,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47027 conditions, 6821 events. 4022/6821 cut-off events. For 763519/763525 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48206 event pairs, 748 based on Foata normal form. 8/6821 useless extension candidates. Maximal degree in co-relation 46811. Up to 6069 conditions per place. [2024-06-14 14:13:56,957 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 66 changer transitions 0/657 dead transitions. [2024-06-14 14:13:56,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 657 transitions, 9271 flow [2024-06-14 14:13:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:13:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:13:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 14:13:56,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:13:56,958 INFO L175 Difference]: Start difference. First operand has 472 places, 637 transitions, 7921 flow. Second operand 6 states and 147 transitions. [2024-06-14 14:13:56,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 657 transitions, 9271 flow [2024-06-14 14:14:00,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 657 transitions, 9069 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 14:14:00,994 INFO L231 Difference]: Finished difference. Result has 472 places, 637 transitions, 7862 flow [2024-06-14 14:14:00,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7719, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7862, PETRI_PLACES=472, PETRI_TRANSITIONS=637} [2024-06-14 14:14:00,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-14 14:14:00,995 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 637 transitions, 7862 flow [2024-06-14 14:14:00,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:00,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:00,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:00,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 14:14:00,995 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:00,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash -105572886, now seen corresponding path program 11 times [2024-06-14 14:14:00,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:00,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066708328] [2024-06-14 14:14:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:00,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:01,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:01,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066708328] [2024-06-14 14:14:01,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066708328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:01,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:01,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:14:01,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135701605] [2024-06-14 14:14:01,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:01,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:14:01,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:14:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:14:01,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:01,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 637 transitions, 7862 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:01,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:01,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:01,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:03,049 INFO L124 PetriNetUnfolderBase]: 4012/6822 cut-off events. [2024-06-14 14:14:03,050 INFO L125 PetriNetUnfolderBase]: For 744828/744834 co-relation queries the response was YES. [2024-06-14 14:14:03,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46467 conditions, 6822 events. 4012/6822 cut-off events. For 744828/744834 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48218 event pairs, 633 based on Foata normal form. 8/6822 useless extension candidates. Maximal degree in co-relation 46250. Up to 5908 conditions per place. [2024-06-14 14:14:03,163 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 564 selfloop transitions, 88 changer transitions 0/659 dead transitions. [2024-06-14 14:14:03,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 659 transitions, 9464 flow [2024-06-14 14:14:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:14:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:14:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:14:03,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:14:03,164 INFO L175 Difference]: Start difference. First operand has 472 places, 637 transitions, 7862 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:14:03,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 659 transitions, 9464 flow [2024-06-14 14:14:07,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 659 transitions, 9261 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 14:14:07,504 INFO L231 Difference]: Finished difference. Result has 472 places, 637 transitions, 7846 flow [2024-06-14 14:14:07,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7846, PETRI_PLACES=472, PETRI_TRANSITIONS=637} [2024-06-14 14:14:07,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-14 14:14:07,505 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 637 transitions, 7846 flow [2024-06-14 14:14:07,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:07,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:07,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:07,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 14:14:07,505 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:07,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash -371596596, now seen corresponding path program 12 times [2024-06-14 14:14:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:07,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809846824] [2024-06-14 14:14:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:07,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:07,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:07,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809846824] [2024-06-14 14:14:07,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809846824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:07,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:07,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:14:07,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887298409] [2024-06-14 14:14:07,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:07,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:14:07,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:07,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:14:07,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:14:07,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:07,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 637 transitions, 7846 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:07,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:07,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:07,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:09,579 INFO L124 PetriNetUnfolderBase]: 4002/6799 cut-off events. [2024-06-14 14:14:09,580 INFO L125 PetriNetUnfolderBase]: For 725937/725943 co-relation queries the response was YES. [2024-06-14 14:14:09,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45952 conditions, 6799 events. 4002/6799 cut-off events. For 725937/725943 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48087 event pairs, 728 based on Foata normal form. 8/6802 useless extension candidates. Maximal degree in co-relation 45735. Up to 6035 conditions per place. [2024-06-14 14:14:09,688 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 585 selfloop transitions, 76 changer transitions 0/668 dead transitions. [2024-06-14 14:14:09,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 668 transitions, 9246 flow [2024-06-14 14:14:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:09,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 14:14:09,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-14 14:14:09,697 INFO L175 Difference]: Start difference. First operand has 472 places, 637 transitions, 7846 flow. Second operand 8 states and 195 transitions. [2024-06-14 14:14:09,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 668 transitions, 9246 flow [2024-06-14 14:14:15,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 668 transitions, 8995 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 14:14:15,137 INFO L231 Difference]: Finished difference. Result has 475 places, 637 transitions, 7761 flow [2024-06-14 14:14:15,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7595, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7761, PETRI_PLACES=475, PETRI_TRANSITIONS=637} [2024-06-14 14:14:15,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 14:14:15,137 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 637 transitions, 7761 flow [2024-06-14 14:14:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:15,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:15,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:15,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 14:14:15,138 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:15,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash 71416902, now seen corresponding path program 3 times [2024-06-14 14:14:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:15,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9602431] [2024-06-14 14:14:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:15,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:15,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:15,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9602431] [2024-06-14 14:14:15,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9602431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:15,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:15,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:15,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429678177] [2024-06-14 14:14:15,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:15,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:15,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:15,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:15,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:15,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:15,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 637 transitions, 7761 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:15,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:15,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:15,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:17,265 INFO L124 PetriNetUnfolderBase]: 4010/6809 cut-off events. [2024-06-14 14:14:17,265 INFO L125 PetriNetUnfolderBase]: For 721004/721004 co-relation queries the response was YES. [2024-06-14 14:14:17,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46037 conditions, 6809 events. 4010/6809 cut-off events. For 721004/721004 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 48192 event pairs, 748 based on Foata normal form. 2/6804 useless extension candidates. Maximal degree in co-relation 45819. Up to 6088 conditions per place. [2024-06-14 14:14:17,405 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 581 selfloop transitions, 67 changer transitions 0/655 dead transitions. [2024-06-14 14:14:17,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 655 transitions, 9175 flow [2024-06-14 14:14:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 14:14:17,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-14 14:14:17,407 INFO L175 Difference]: Start difference. First operand has 475 places, 637 transitions, 7761 flow. Second operand 8 states and 179 transitions. [2024-06-14 14:14:17,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 655 transitions, 9175 flow [2024-06-14 14:14:21,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 655 transitions, 8982 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 14:14:21,621 INFO L231 Difference]: Finished difference. Result has 475 places, 639 transitions, 7791 flow [2024-06-14 14:14:21,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7568, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7791, PETRI_PLACES=475, PETRI_TRANSITIONS=639} [2024-06-14 14:14:21,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 14:14:21,621 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 639 transitions, 7791 flow [2024-06-14 14:14:21,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:21,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:21,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:21,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 14:14:21,622 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:21,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:21,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2094223558, now seen corresponding path program 4 times [2024-06-14 14:14:21,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:21,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068294290] [2024-06-14 14:14:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:21,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:21,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:21,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068294290] [2024-06-14 14:14:21,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068294290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:21,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:21,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:21,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656683041] [2024-06-14 14:14:21,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:21,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:21,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:21,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:21,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:21,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:21,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 639 transitions, 7791 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:21,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:21,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:21,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:23,525 INFO L124 PetriNetUnfolderBase]: 4018/6817 cut-off events. [2024-06-14 14:14:23,525 INFO L125 PetriNetUnfolderBase]: For 722666/722666 co-relation queries the response was YES. [2024-06-14 14:14:23,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46189 conditions, 6817 events. 4018/6817 cut-off events. For 722666/722666 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 48147 event pairs, 742 based on Foata normal form. 2/6812 useless extension candidates. Maximal degree in co-relation 45970. Up to 6080 conditions per place. [2024-06-14 14:14:23,639 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 580 selfloop transitions, 72 changer transitions 0/659 dead transitions. [2024-06-14 14:14:23,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 659 transitions, 9221 flow [2024-06-14 14:14:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:14:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:14:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 14:14:23,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 14:14:23,641 INFO L175 Difference]: Start difference. First operand has 475 places, 639 transitions, 7791 flow. Second operand 9 states and 198 transitions. [2024-06-14 14:14:23,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 659 transitions, 9221 flow [2024-06-14 14:14:27,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 659 transitions, 9014 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 14:14:27,929 INFO L231 Difference]: Finished difference. Result has 478 places, 641 transitions, 7821 flow [2024-06-14 14:14:27,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7821, PETRI_PLACES=478, PETRI_TRANSITIONS=641} [2024-06-14 14:14:27,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-14 14:14:27,929 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 641 transitions, 7821 flow [2024-06-14 14:14:27,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:27,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:27,930 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, 1] [2024-06-14 14:14:27,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 14:14:27,930 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:27,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash 943035620, now seen corresponding path program 5 times [2024-06-14 14:14:27,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:27,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895029488] [2024-06-14 14:14:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:27,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:28,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:28,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895029488] [2024-06-14 14:14:28,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895029488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:28,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:28,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:28,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811496265] [2024-06-14 14:14:28,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:28,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:28,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:28,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:28,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:28,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 641 transitions, 7821 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:28,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:28,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:28,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:30,049 INFO L124 PetriNetUnfolderBase]: 4026/6842 cut-off events. [2024-06-14 14:14:30,050 INFO L125 PetriNetUnfolderBase]: For 735751/735757 co-relation queries the response was YES. [2024-06-14 14:14:30,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46422 conditions, 6842 events. 4026/6842 cut-off events. For 735751/735757 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 48449 event pairs, 744 based on Foata normal form. 6/6843 useless extension candidates. Maximal degree in co-relation 46202. Up to 6106 conditions per place. [2024-06-14 14:14:30,158 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 70 changer transitions 0/661 dead transitions. [2024-06-14 14:14:30,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 661 transitions, 9261 flow [2024-06-14 14:14:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:14:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:14:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:14:30,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 14:14:30,159 INFO L175 Difference]: Start difference. First operand has 478 places, 641 transitions, 7821 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:14:30,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 661 transitions, 9261 flow [2024-06-14 14:14:34,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 661 transitions, 9040 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 14:14:34,870 INFO L231 Difference]: Finished difference. Result has 478 places, 643 transitions, 7840 flow [2024-06-14 14:14:34,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7840, PETRI_PLACES=478, PETRI_TRANSITIONS=643} [2024-06-14 14:14:34,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-14 14:14:34,871 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 643 transitions, 7840 flow [2024-06-14 14:14:34,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:34,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:34,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:34,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 14:14:34,871 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:34,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash 951606500, now seen corresponding path program 6 times [2024-06-14 14:14:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:34,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368155917] [2024-06-14 14:14:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:34,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:35,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:35,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368155917] [2024-06-14 14:14:35,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368155917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:35,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:35,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:35,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120082913] [2024-06-14 14:14:35,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:35,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:35,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:35,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:35,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:35,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:35,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 643 transitions, 7840 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:35,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:35,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:35,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:36,996 INFO L124 PetriNetUnfolderBase]: 4034/6846 cut-off events. [2024-06-14 14:14:36,996 INFO L125 PetriNetUnfolderBase]: For 747535/747541 co-relation queries the response was YES. [2024-06-14 14:14:37,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46609 conditions, 6846 events. 4034/6846 cut-off events. For 747535/747541 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 48396 event pairs, 732 based on Foata normal form. 6/6847 useless extension candidates. Maximal degree in co-relation 46388. Up to 6078 conditions per place. [2024-06-14 14:14:37,109 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 578 selfloop transitions, 80 changer transitions 0/665 dead transitions. [2024-06-14 14:14:37,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 665 transitions, 9296 flow [2024-06-14 14:14:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 14:14:37,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 14:14:37,110 INFO L175 Difference]: Start difference. First operand has 478 places, 643 transitions, 7840 flow. Second operand 8 states and 182 transitions. [2024-06-14 14:14:37,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 665 transitions, 9296 flow [2024-06-14 14:14:41,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 665 transitions, 9082 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 14:14:41,877 INFO L231 Difference]: Finished difference. Result has 481 places, 645 transitions, 7890 flow [2024-06-14 14:14:41,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7890, PETRI_PLACES=481, PETRI_TRANSITIONS=645} [2024-06-14 14:14:41,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-14 14:14:41,878 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 645 transitions, 7890 flow [2024-06-14 14:14:41,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:41,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:41,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:41,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 14:14:41,879 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:41,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2126275932, now seen corresponding path program 7 times [2024-06-14 14:14:41,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:41,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804019711] [2024-06-14 14:14:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:41,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:42,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:42,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804019711] [2024-06-14 14:14:42,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804019711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:42,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:42,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:42,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558058777] [2024-06-14 14:14:42,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:42,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:42,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:42,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:42,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:42,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:42,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 645 transitions, 7890 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:42,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:42,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:43,894 INFO L124 PetriNetUnfolderBase]: 4042/6861 cut-off events. [2024-06-14 14:14:43,895 INFO L125 PetriNetUnfolderBase]: For 758689/758689 co-relation queries the response was YES. [2024-06-14 14:14:43,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46874 conditions, 6861 events. 4042/6861 cut-off events. For 758689/758689 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48598 event pairs, 751 based on Foata normal form. 2/6856 useless extension candidates. Maximal degree in co-relation 46652. Up to 6130 conditions per place. [2024-06-14 14:14:43,998 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 585 selfloop transitions, 70 changer transitions 0/662 dead transitions. [2024-06-14 14:14:43,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 662 transitions, 9332 flow [2024-06-14 14:14:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:14:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:14:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 14:14:44,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-14 14:14:44,000 INFO L175 Difference]: Start difference. First operand has 481 places, 645 transitions, 7890 flow. Second operand 7 states and 160 transitions. [2024-06-14 14:14:44,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 662 transitions, 9332 flow [2024-06-14 14:14:48,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 662 transitions, 9094 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 14:14:48,705 INFO L231 Difference]: Finished difference. Result has 482 places, 647 transitions, 7900 flow [2024-06-14 14:14:48,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7652, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7900, PETRI_PLACES=482, PETRI_TRANSITIONS=647} [2024-06-14 14:14:48,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-14 14:14:48,706 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 647 transitions, 7900 flow [2024-06-14 14:14:48,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:48,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:48,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:48,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 14:14:48,706 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:48,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2125828602, now seen corresponding path program 8 times [2024-06-14 14:14:48,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:48,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448699076] [2024-06-14 14:14:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:48,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:48,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:48,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448699076] [2024-06-14 14:14:48,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448699076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:48,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:48,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:48,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241019850] [2024-06-14 14:14:48,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:48,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:48,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:48,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:48,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:49,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:49,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 647 transitions, 7900 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:49,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:49,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:49,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:50,754 INFO L124 PetriNetUnfolderBase]: 4037/6838 cut-off events. [2024-06-14 14:14:50,754 INFO L125 PetriNetUnfolderBase]: For 752344/752344 co-relation queries the response was YES. [2024-06-14 14:14:50,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46443 conditions, 6838 events. 4037/6838 cut-off events. For 752344/752344 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48309 event pairs, 738 based on Foata normal form. 2/6833 useless extension candidates. Maximal degree in co-relation 46220. Up to 6083 conditions per place. [2024-06-14 14:14:50,867 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 579 selfloop transitions, 80 changer transitions 0/666 dead transitions. [2024-06-14 14:14:50,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 666 transitions, 9358 flow [2024-06-14 14:14:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 14:14:50,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-14 14:14:50,868 INFO L175 Difference]: Start difference. First operand has 482 places, 647 transitions, 7900 flow. Second operand 8 states and 179 transitions. [2024-06-14 14:14:50,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 666 transitions, 9358 flow [2024-06-14 14:14:56,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 666 transitions, 9126 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 14:14:56,315 INFO L231 Difference]: Finished difference. Result has 485 places, 649 transitions, 7940 flow [2024-06-14 14:14:56,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7940, PETRI_PLACES=485, PETRI_TRANSITIONS=649} [2024-06-14 14:14:56,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-14 14:14:56,315 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 649 transitions, 7940 flow [2024-06-14 14:14:56,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:56,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:56,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:56,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 14:14:56,316 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:56,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash 760878703, now seen corresponding path program 1 times [2024-06-14 14:14:56,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:56,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601109218] [2024-06-14 14:14:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:56,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:56,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:56,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601109218] [2024-06-14 14:14:56,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601109218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:56,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:56,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:14:56,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18460032] [2024-06-14 14:14:56,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:56,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:14:56,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:56,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:14:56,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:14:56,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:56,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 649 transitions, 7940 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:56,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:56,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:56,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:58,454 INFO L124 PetriNetUnfolderBase]: 4058/6890 cut-off events. [2024-06-14 14:14:58,454 INFO L125 PetriNetUnfolderBase]: For 759490/759496 co-relation queries the response was YES. [2024-06-14 14:14:58,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46769 conditions, 6890 events. 4058/6890 cut-off events. For 759490/759496 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 48835 event pairs, 777 based on Foata normal form. 1/6884 useless extension candidates. Maximal degree in co-relation 46545. Up to 5647 conditions per place. [2024-06-14 14:14:58,561 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 401 selfloop transitions, 283 changer transitions 0/691 dead transitions. [2024-06-14 14:14:58,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 691 transitions, 9998 flow [2024-06-14 14:14:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:14:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:14:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 14:14:58,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:14:58,563 INFO L175 Difference]: Start difference. First operand has 485 places, 649 transitions, 7940 flow. Second operand 9 states and 222 transitions. [2024-06-14 14:14:58,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 691 transitions, 9998 flow [2024-06-14 14:15:04,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 691 transitions, 9746 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 14:15:04,139 INFO L231 Difference]: Finished difference. Result has 488 places, 658 transitions, 8366 flow [2024-06-14 14:15:04,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7692, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8366, PETRI_PLACES=488, PETRI_TRANSITIONS=658} [2024-06-14 14:15:04,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-14 14:15:04,140 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 658 transitions, 8366 flow [2024-06-14 14:15:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:04,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:04,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:04,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 14:15:04,140 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:04,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:04,141 INFO L85 PathProgramCache]: Analyzing trace with hash -760499375, now seen corresponding path program 2 times [2024-06-14 14:15:04,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:04,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099768486] [2024-06-14 14:15:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:04,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:04,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:04,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099768486] [2024-06-14 14:15:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099768486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:15:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733427907] [2024-06-14 14:15:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:15:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:15:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:15:04,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:04,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 658 transitions, 8366 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:04,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:04,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:04,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:06,179 INFO L124 PetriNetUnfolderBase]: 4071/6914 cut-off events. [2024-06-14 14:15:06,179 INFO L125 PetriNetUnfolderBase]: For 768888/768894 co-relation queries the response was YES. [2024-06-14 14:15:06,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47979 conditions, 6914 events. 4071/6914 cut-off events. For 768888/768894 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 49097 event pairs, 748 based on Foata normal form. 5/6914 useless extension candidates. Maximal degree in co-relation 47754. Up to 5991 conditions per place. [2024-06-14 14:15:06,290 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 504 selfloop transitions, 188 changer transitions 0/699 dead transitions. [2024-06-14 14:15:06,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 699 transitions, 10168 flow [2024-06-14 14:15:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:15:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:15:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 272 transitions. [2024-06-14 14:15:06,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-14 14:15:06,291 INFO L175 Difference]: Start difference. First operand has 488 places, 658 transitions, 8366 flow. Second operand 12 states and 272 transitions. [2024-06-14 14:15:06,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 699 transitions, 10168 flow [2024-06-14 14:15:12,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 699 transitions, 9845 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 14:15:12,032 INFO L231 Difference]: Finished difference. Result has 496 places, 664 transitions, 8507 flow [2024-06-14 14:15:12,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8507, PETRI_PLACES=496, PETRI_TRANSITIONS=664} [2024-06-14 14:15:12,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-14 14:15:12,033 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 664 transitions, 8507 flow [2024-06-14 14:15:12,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:12,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:12,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:12,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 14:15:12,034 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:12,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash -760504955, now seen corresponding path program 3 times [2024-06-14 14:15:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:12,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287204813] [2024-06-14 14:15:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:12,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:12,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287204813] [2024-06-14 14:15:12,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287204813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:12,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:12,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:15:12,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147367971] [2024-06-14 14:15:12,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:12,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:15:12,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:15:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:15:12,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:12,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 664 transitions, 8507 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:12,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:12,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:12,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:14,305 INFO L124 PetriNetUnfolderBase]: 4068/6910 cut-off events. [2024-06-14 14:15:14,305 INFO L125 PetriNetUnfolderBase]: For 771643/771649 co-relation queries the response was YES. [2024-06-14 14:15:14,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48244 conditions, 6910 events. 4068/6910 cut-off events. For 771643/771649 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 49005 event pairs, 748 based on Foata normal form. 5/6910 useless extension candidates. Maximal degree in co-relation 48017. Up to 5988 conditions per place. [2024-06-14 14:15:14,412 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 187 changer transitions 0/696 dead transitions. [2024-06-14 14:15:14,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 696 transitions, 9965 flow [2024-06-14 14:15:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:15:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:15:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-14 14:15:14,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-14 14:15:14,413 INFO L175 Difference]: Start difference. First operand has 496 places, 664 transitions, 8507 flow. Second operand 10 states and 237 transitions. [2024-06-14 14:15:14,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 696 transitions, 9965 flow [2024-06-14 14:15:20,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 696 transitions, 9717 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 14:15:20,486 INFO L231 Difference]: Finished difference. Result has 498 places, 664 transitions, 8639 flow [2024-06-14 14:15:20,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8259, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8639, PETRI_PLACES=498, PETRI_TRANSITIONS=664} [2024-06-14 14:15:20,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-14 14:15:20,487 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 664 transitions, 8639 flow [2024-06-14 14:15:20,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:20,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:20,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:20,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 14:15:20,487 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:20,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 55399983, now seen corresponding path program 4 times [2024-06-14 14:15:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:20,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205132384] [2024-06-14 14:15:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:20,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:20,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205132384] [2024-06-14 14:15:20,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205132384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:20,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:20,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:15:20,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446622608] [2024-06-14 14:15:20,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:20,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:15:20,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:15:20,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:15:20,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:20,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 664 transitions, 8639 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:20,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:20,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:20,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:22,602 INFO L124 PetriNetUnfolderBase]: 4089/6945 cut-off events. [2024-06-14 14:15:22,602 INFO L125 PetriNetUnfolderBase]: For 799664/799670 co-relation queries the response was YES. [2024-06-14 14:15:22,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49098 conditions, 6945 events. 4089/6945 cut-off events. For 799664/799670 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 49282 event pairs, 748 based on Foata normal form. 5/6945 useless extension candidates. Maximal degree in co-relation 48869. Up to 5996 conditions per place. [2024-06-14 14:15:22,714 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 201 changer transitions 0/710 dead transitions. [2024-06-14 14:15:22,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 710 transitions, 10739 flow [2024-06-14 14:15:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:15:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:15:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 297 transitions. [2024-06-14 14:15:22,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439560439560439 [2024-06-14 14:15:22,716 INFO L175 Difference]: Start difference. First operand has 498 places, 664 transitions, 8639 flow. Second operand 13 states and 297 transitions. [2024-06-14 14:15:22,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 710 transitions, 10739 flow [2024-06-14 14:15:28,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 710 transitions, 10365 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:15:28,190 INFO L231 Difference]: Finished difference. Result has 503 places, 673 transitions, 8786 flow [2024-06-14 14:15:28,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8265, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8786, PETRI_PLACES=503, PETRI_TRANSITIONS=673} [2024-06-14 14:15:28,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-14 14:15:28,191 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 673 transitions, 8786 flow [2024-06-14 14:15:28,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:28,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:28,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:28,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-14 14:15:28,191 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:28,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:28,191 INFO L85 PathProgramCache]: Analyzing trace with hash 435610449, now seen corresponding path program 5 times [2024-06-14 14:15:28,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:28,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240001792] [2024-06-14 14:15:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:28,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:28,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:28,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240001792] [2024-06-14 14:15:28,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240001792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:28,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:28,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:15:28,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346805795] [2024-06-14 14:15:28,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:28,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:15:28,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:15:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:15:28,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:28,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 673 transitions, 8786 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:28,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:28,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:28,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:30,644 INFO L124 PetriNetUnfolderBase]: 4094/6954 cut-off events. [2024-06-14 14:15:30,644 INFO L125 PetriNetUnfolderBase]: For 811304/811310 co-relation queries the response was YES. [2024-06-14 14:15:30,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49320 conditions, 6954 events. 4094/6954 cut-off events. For 811304/811310 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49393 event pairs, 748 based on Foata normal form. 5/6954 useless extension candidates. Maximal degree in co-relation 49089. Up to 6002 conditions per place. [2024-06-14 14:15:30,754 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 205 changer transitions 0/715 dead transitions. [2024-06-14 14:15:30,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 715 transitions, 10854 flow [2024-06-14 14:15:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:15:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:15:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 333 transitions. [2024-06-14 14:15:30,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-14 14:15:30,756 INFO L175 Difference]: Start difference. First operand has 503 places, 673 transitions, 8786 flow. Second operand 15 states and 333 transitions. [2024-06-14 14:15:30,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 715 transitions, 10854 flow [2024-06-14 14:15:36,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 715 transitions, 10438 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-14 14:15:36,635 INFO L231 Difference]: Finished difference. Result has 509 places, 676 transitions, 8820 flow [2024-06-14 14:15:36,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8380, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8820, PETRI_PLACES=509, PETRI_TRANSITIONS=676} [2024-06-14 14:15:36,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-14 14:15:36,635 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 676 transitions, 8820 flow [2024-06-14 14:15:36,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:36,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:36,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:36,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-14 14:15:36,636 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:36,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash 442962099, now seen corresponding path program 6 times [2024-06-14 14:15:36,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:36,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301708430] [2024-06-14 14:15:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:36,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:36,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:36,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301708430] [2024-06-14 14:15:36,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301708430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:36,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:36,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:15:36,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492807286] [2024-06-14 14:15:36,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:36,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:15:36,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:15:36,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:15:36,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:36,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 676 transitions, 8820 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:36,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:36,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:36,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:38,797 INFO L124 PetriNetUnfolderBase]: 4091/6950 cut-off events. [2024-06-14 14:15:38,798 INFO L125 PetriNetUnfolderBase]: For 814128/814134 co-relation queries the response was YES. [2024-06-14 14:15:38,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49243 conditions, 6950 events. 4091/6950 cut-off events. For 814128/814134 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49328 event pairs, 748 based on Foata normal form. 5/6950 useless extension candidates. Maximal degree in co-relation 49011. Up to 6017 conditions per place. [2024-06-14 14:15:38,911 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 513 selfloop transitions, 188 changer transitions 0/708 dead transitions. [2024-06-14 14:15:38,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 708 transitions, 10564 flow [2024-06-14 14:15:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:15:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:15:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-14 14:15:38,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2024-06-14 14:15:38,913 INFO L175 Difference]: Start difference. First operand has 509 places, 676 transitions, 8820 flow. Second operand 12 states and 269 transitions. [2024-06-14 14:15:38,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 708 transitions, 10564 flow [2024-06-14 14:15:44,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 708 transitions, 10146 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-14 14:15:44,861 INFO L231 Difference]: Finished difference. Result has 508 places, 676 transitions, 8784 flow [2024-06-14 14:15:44,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8402, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8784, PETRI_PLACES=508, PETRI_TRANSITIONS=676} [2024-06-14 14:15:44,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-14 14:15:44,862 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 676 transitions, 8784 flow [2024-06-14 14:15:44,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:44,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:44,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:44,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-14 14:15:44,862 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:44,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:44,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1522218733, now seen corresponding path program 7 times [2024-06-14 14:15:44,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:44,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627293465] [2024-06-14 14:15:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:44,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:45,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:45,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627293465] [2024-06-14 14:15:45,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627293465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:45,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:45,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:45,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939323313] [2024-06-14 14:15:45,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:45,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:45,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:45,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:45,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:45,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:45,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 676 transitions, 8784 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:45,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:45,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:45,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:47,117 INFO L124 PetriNetUnfolderBase]: 4104/6952 cut-off events. [2024-06-14 14:15:47,118 INFO L125 PetriNetUnfolderBase]: For 834080/834080 co-relation queries the response was YES. [2024-06-14 14:15:47,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49529 conditions, 6952 events. 4104/6952 cut-off events. For 834080/834080 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 49269 event pairs, 784 based on Foata normal form. 1/6945 useless extension candidates. Maximal degree in co-relation 49296. Up to 5907 conditions per place. [2024-06-14 14:15:47,228 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 477 selfloop transitions, 232 changer transitions 0/716 dead transitions. [2024-06-14 14:15:47,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 716 transitions, 10924 flow [2024-06-14 14:15:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:15:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:15:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-14 14:15:47,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-14 14:15:47,230 INFO L175 Difference]: Start difference. First operand has 508 places, 676 transitions, 8784 flow. Second operand 10 states and 237 transitions. [2024-06-14 14:15:47,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 716 transitions, 10924 flow [2024-06-14 14:15:53,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 716 transitions, 10524 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 14:15:53,600 INFO L231 Difference]: Finished difference. Result has 507 places, 685 transitions, 8974 flow [2024-06-14 14:15:53,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8384, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8974, PETRI_PLACES=507, PETRI_TRANSITIONS=685} [2024-06-14 14:15:53,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-14 14:15:53,601 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 685 transitions, 8974 flow [2024-06-14 14:15:53,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:53,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:53,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-14 14:15:53,602 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:53,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1811144765, now seen corresponding path program 8 times [2024-06-14 14:15:53,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:53,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927745430] [2024-06-14 14:15:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:53,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:53,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927745430] [2024-06-14 14:15:53,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927745430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:53,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:53,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:53,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909620495] [2024-06-14 14:15:53,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:53,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:53,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:53,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:53,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 685 transitions, 8974 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:53,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:53,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:53,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:55,674 INFO L124 PetriNetUnfolderBase]: 4125/6987 cut-off events. [2024-06-14 14:15:55,674 INFO L125 PetriNetUnfolderBase]: For 867633/867633 co-relation queries the response was YES. [2024-06-14 14:15:55,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50863 conditions, 6987 events. 4125/6987 cut-off events. For 867633/867633 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49640 event pairs, 784 based on Foata normal form. 1/6980 useless extension candidates. Maximal degree in co-relation 50629. Up to 5587 conditions per place. [2024-06-14 14:15:55,787 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 387 changer transitions 0/732 dead transitions. [2024-06-14 14:15:55,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 732 transitions, 11452 flow [2024-06-14 14:15:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:15:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:15:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 299 transitions. [2024-06-14 14:15:55,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:15:55,788 INFO L175 Difference]: Start difference. First operand has 507 places, 685 transitions, 8974 flow. Second operand 13 states and 299 transitions. [2024-06-14 14:15:55,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 732 transitions, 11452 flow [2024-06-14 14:16:03,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 732 transitions, 11062 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-14 14:16:03,292 INFO L231 Difference]: Finished difference. Result has 515 places, 694 transitions, 9496 flow [2024-06-14 14:16:03,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8650, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9496, PETRI_PLACES=515, PETRI_TRANSITIONS=694} [2024-06-14 14:16:03,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 472 predicate places. [2024-06-14 14:16:03,293 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 694 transitions, 9496 flow [2024-06-14 14:16:03,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:03,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:03,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:03,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-14 14:16:03,294 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:03,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:03,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2127017405, now seen corresponding path program 9 times [2024-06-14 14:16:03,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:03,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229057345] [2024-06-14 14:16:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:03,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:03,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229057345] [2024-06-14 14:16:03,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229057345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:03,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:03,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:03,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468983597] [2024-06-14 14:16:03,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:03,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:03,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:03,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:03,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:03,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 694 transitions, 9496 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:03,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:03,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:03,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:05,602 INFO L124 PetriNetUnfolderBase]: 4122/6983 cut-off events. [2024-06-14 14:16:05,602 INFO L125 PetriNetUnfolderBase]: For 871205/871205 co-relation queries the response was YES. [2024-06-14 14:16:05,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51507 conditions, 6983 events. 4122/6983 cut-off events. For 871205/871205 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49629 event pairs, 784 based on Foata normal form. 1/6976 useless extension candidates. Maximal degree in co-relation 51271. Up to 5584 conditions per place. [2024-06-14 14:16:05,716 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 383 changer transitions 0/731 dead transitions. [2024-06-14 14:16:05,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 731 transitions, 11844 flow [2024-06-14 14:16:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:16:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:16:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2024-06-14 14:16:05,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615079365079365 [2024-06-14 14:16:05,717 INFO L175 Difference]: Start difference. First operand has 515 places, 694 transitions, 9496 flow. Second operand 12 states and 283 transitions. [2024-06-14 14:16:05,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 731 transitions, 11844 flow [2024-06-14 14:16:13,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 731 transitions, 11153 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 14:16:13,412 INFO L231 Difference]: Finished difference. Result has 518 places, 694 transitions, 9577 flow [2024-06-14 14:16:13,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8805, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9577, PETRI_PLACES=518, PETRI_TRANSITIONS=694} [2024-06-14 14:16:13,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-14 14:16:13,413 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 694 transitions, 9577 flow [2024-06-14 14:16:13,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:13,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:13,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:13,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-14 14:16:13,413 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:13,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash 275307267, now seen corresponding path program 10 times [2024-06-14 14:16:13,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:13,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098920602] [2024-06-14 14:16:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:13,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098920602] [2024-06-14 14:16:13,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098920602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:13,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:13,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:13,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765069745] [2024-06-14 14:16:13,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:13,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:13,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:13,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:13,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 694 transitions, 9577 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:13,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:13,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:13,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:15,571 INFO L124 PetriNetUnfolderBase]: 4119/6979 cut-off events. [2024-06-14 14:16:15,572 INFO L125 PetriNetUnfolderBase]: For 874428/874428 co-relation queries the response was YES. [2024-06-14 14:16:15,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51506 conditions, 6979 events. 4119/6979 cut-off events. For 874428/874428 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49601 event pairs, 784 based on Foata normal form. 1/6972 useless extension candidates. Maximal degree in co-relation 51269. Up to 5581 conditions per place. [2024-06-14 14:16:15,693 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 356 changer transitions 0/730 dead transitions. [2024-06-14 14:16:15,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 730 transitions, 12199 flow [2024-06-14 14:16:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:16:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:16:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-14 14:16:15,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 14:16:15,694 INFO L175 Difference]: Start difference. First operand has 518 places, 694 transitions, 9577 flow. Second operand 10 states and 246 transitions. [2024-06-14 14:16:15,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 730 transitions, 12199 flow [2024-06-14 14:16:23,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 730 transitions, 11451 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:16:23,207 INFO L231 Difference]: Finished difference. Result has 519 places, 694 transitions, 9547 flow [2024-06-14 14:16:23,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8829, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9547, PETRI_PLACES=519, PETRI_TRANSITIONS=694} [2024-06-14 14:16:23,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-14 14:16:23,208 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 694 transitions, 9547 flow [2024-06-14 14:16:23,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:23,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:23,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:23,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-14 14:16:23,208 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:23,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:23,209 INFO L85 PathProgramCache]: Analyzing trace with hash 279031917, now seen corresponding path program 11 times [2024-06-14 14:16:23,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:23,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572539359] [2024-06-14 14:16:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:23,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:23,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572539359] [2024-06-14 14:16:23,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572539359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:23,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:23,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:23,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568862633] [2024-06-14 14:16:23,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:23,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:23,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:23,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:23,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 694 transitions, 9547 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:23,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:23,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:23,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:25,491 INFO L124 PetriNetUnfolderBase]: 4132/7009 cut-off events. [2024-06-14 14:16:25,491 INFO L125 PetriNetUnfolderBase]: For 895717/895717 co-relation queries the response was YES. [2024-06-14 14:16:25,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51767 conditions, 7009 events. 4132/7009 cut-off events. For 895717/895717 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49849 event pairs, 751 based on Foata normal form. 1/7003 useless extension candidates. Maximal degree in co-relation 51529. Up to 6076 conditions per place. [2024-06-14 14:16:25,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 188 changer transitions 0/732 dead transitions. [2024-06-14 14:16:25,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 732 transitions, 11411 flow [2024-06-14 14:16:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:16:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:16:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-14 14:16:25,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2024-06-14 14:16:25,612 INFO L175 Difference]: Start difference. First operand has 519 places, 694 transitions, 9547 flow. Second operand 12 states and 269 transitions. [2024-06-14 14:16:25,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 732 transitions, 11411 flow [2024-06-14 14:16:32,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 732 transitions, 10653 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:16:32,913 INFO L231 Difference]: Finished difference. Result has 521 places, 700 transitions, 9239 flow [2024-06-14 14:16:32,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8801, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9239, PETRI_PLACES=521, PETRI_TRANSITIONS=700} [2024-06-14 14:16:32,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-14 14:16:32,914 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 700 transitions, 9239 flow [2024-06-14 14:16:32,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:32,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:32,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:32,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-14 14:16:32,914 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:32,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 279026337, now seen corresponding path program 12 times [2024-06-14 14:16:32,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:32,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780658006] [2024-06-14 14:16:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:33,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:33,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780658006] [2024-06-14 14:16:33,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780658006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:33,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:33,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:33,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381545596] [2024-06-14 14:16:33,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:33,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:33,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:33,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:33,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:33,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:33,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 700 transitions, 9239 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:33,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:33,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:33,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:34,949 INFO L124 PetriNetUnfolderBase]: 4129/7005 cut-off events. [2024-06-14 14:16:34,949 INFO L125 PetriNetUnfolderBase]: For 896885/896885 co-relation queries the response was YES. [2024-06-14 14:16:35,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51274 conditions, 7005 events. 4129/7005 cut-off events. For 896885/896885 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49836 event pairs, 751 based on Foata normal form. 1/6999 useless extension candidates. Maximal degree in co-relation 51035. Up to 6073 conditions per place. [2024-06-14 14:16:35,306 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 535 selfloop transitions, 187 changer transitions 0/729 dead transitions. [2024-06-14 14:16:35,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 729 transitions, 10755 flow [2024-06-14 14:16:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:16:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:16:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-14 14:16:35,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-14 14:16:35,307 INFO L175 Difference]: Start difference. First operand has 521 places, 700 transitions, 9239 flow. Second operand 10 states and 234 transitions. [2024-06-14 14:16:35,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 729 transitions, 10755 flow [2024-06-14 14:16:42,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 729 transitions, 10507 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 14:16:42,011 INFO L231 Difference]: Finished difference. Result has 523 places, 700 transitions, 9371 flow [2024-06-14 14:16:42,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8991, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9371, PETRI_PLACES=523, PETRI_TRANSITIONS=700} [2024-06-14 14:16:42,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 480 predicate places. [2024-06-14 14:16:42,012 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 700 transitions, 9371 flow [2024-06-14 14:16:42,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:42,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:42,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:42,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-14 14:16:42,012 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:42,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:42,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1000054067, now seen corresponding path program 13 times [2024-06-14 14:16:42,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:42,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088045280] [2024-06-14 14:16:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:42,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:42,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:42,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088045280] [2024-06-14 14:16:42,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088045280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:42,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:42,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:42,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405272391] [2024-06-14 14:16:42,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:42,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:42,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:42,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:42,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 700 transitions, 9371 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:42,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:42,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:42,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:44,134 INFO L124 PetriNetUnfolderBase]: 4158/7053 cut-off events. [2024-06-14 14:16:44,134 INFO L125 PetriNetUnfolderBase]: For 938061/938061 co-relation queries the response was YES. [2024-06-14 14:16:44,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52329 conditions, 7053 events. 4158/7053 cut-off events. For 938061/938061 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 50281 event pairs, 751 based on Foata normal form. 1/7047 useless extension candidates. Maximal degree in co-relation 52088. Up to 6061 conditions per place. [2024-06-14 14:16:44,256 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 230 changer transitions 0/744 dead transitions. [2024-06-14 14:16:44,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 744 transitions, 11589 flow [2024-06-14 14:16:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:16:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:16:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-14 14:16:44,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-06-14 14:16:44,257 INFO L175 Difference]: Start difference. First operand has 523 places, 700 transitions, 9371 flow. Second operand 14 states and 309 transitions. [2024-06-14 14:16:44,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 744 transitions, 11589 flow [2024-06-14 14:16:53,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 744 transitions, 11215 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:16:53,156 INFO L231 Difference]: Finished difference. Result has 528 places, 712 transitions, 9587 flow [2024-06-14 14:16:53,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8997, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9587, PETRI_PLACES=528, PETRI_TRANSITIONS=712} [2024-06-14 14:16:53,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 485 predicate places. [2024-06-14 14:16:53,157 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 712 transitions, 9587 flow [2024-06-14 14:16:53,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:53,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:53,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:53,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-14 14:16:53,157 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:53,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash 999846677, now seen corresponding path program 14 times [2024-06-14 14:16:53,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:53,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201112379] [2024-06-14 14:16:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:53,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201112379] [2024-06-14 14:16:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201112379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080971483] [2024-06-14 14:16:53,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:53,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:53,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:53,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 712 transitions, 9587 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:53,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:53,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:53,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:55,481 INFO L124 PetriNetUnfolderBase]: 4171/7075 cut-off events. [2024-06-14 14:16:55,481 INFO L125 PetriNetUnfolderBase]: For 960734/960734 co-relation queries the response was YES. [2024-06-14 14:16:55,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52796 conditions, 7075 events. 4171/7075 cut-off events. For 960734/960734 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50487 event pairs, 751 based on Foata normal form. 1/7069 useless extension candidates. Maximal degree in co-relation 52554. Up to 6076 conditions per place. [2024-06-14 14:16:55,600 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 237 changer transitions 0/751 dead transitions. [2024-06-14 14:16:55,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 751 transitions, 11781 flow [2024-06-14 14:16:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:16:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:16:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 325 transitions. [2024-06-14 14:16:55,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 14:16:55,602 INFO L175 Difference]: Start difference. First operand has 528 places, 712 transitions, 9587 flow. Second operand 15 states and 325 transitions. [2024-06-14 14:16:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 751 transitions, 11781 flow [2024-06-14 14:17:04,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 751 transitions, 11472 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-14 14:17:04,464 INFO L231 Difference]: Finished difference. Result has 534 places, 718 transitions, 9826 flow [2024-06-14 14:17:04,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9294, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9826, PETRI_PLACES=534, PETRI_TRANSITIONS=718} [2024-06-14 14:17:04,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-14 14:17:04,465 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 718 transitions, 9826 flow [2024-06-14 14:17:04,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:04,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:04,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:04,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-14 14:17:04,465 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:04,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash 994691687, now seen corresponding path program 15 times [2024-06-14 14:17:04,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:04,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753046468] [2024-06-14 14:17:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:04,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:04,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:04,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753046468] [2024-06-14 14:17:04,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753046468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:04,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:04,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:04,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806344004] [2024-06-14 14:17:04,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:04,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:04,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:04,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:04,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:04,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 718 transitions, 9826 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:04,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:04,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:04,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:06,866 INFO L124 PetriNetUnfolderBase]: 4168/7071 cut-off events. [2024-06-14 14:17:06,867 INFO L125 PetriNetUnfolderBase]: For 963690/963690 co-relation queries the response was YES. [2024-06-14 14:17:06,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53136 conditions, 7071 events. 4168/7071 cut-off events. For 963690/963690 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50419 event pairs, 751 based on Foata normal form. 1/7065 useless extension candidates. Maximal degree in co-relation 52892. Up to 6073 conditions per place. [2024-06-14 14:17:06,989 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 508 selfloop transitions, 232 changer transitions 0/747 dead transitions. [2024-06-14 14:17:06,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 747 transitions, 11940 flow [2024-06-14 14:17:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:17:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:17:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-14 14:17:06,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-14 14:17:06,990 INFO L175 Difference]: Start difference. First operand has 534 places, 718 transitions, 9826 flow. Second operand 11 states and 255 transitions. [2024-06-14 14:17:06,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 747 transitions, 11940 flow [2024-06-14 14:17:15,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 747 transitions, 11506 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 14:17:15,969 INFO L231 Difference]: Finished difference. Result has 534 places, 718 transitions, 9862 flow [2024-06-14 14:17:15,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9392, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9862, PETRI_PLACES=534, PETRI_TRANSITIONS=718} [2024-06-14 14:17:15,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-14 14:17:15,970 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 718 transitions, 9862 flow [2024-06-14 14:17:15,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:15,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:15,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:15,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-14 14:17:15,970 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:15,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash 994305737, now seen corresponding path program 16 times [2024-06-14 14:17:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:15,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775014566] [2024-06-14 14:17:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:15,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:16,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775014566] [2024-06-14 14:17:16,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775014566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:16,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:16,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:16,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084850013] [2024-06-14 14:17:16,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:16,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:16,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:16,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:16,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:16,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:16,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 718 transitions, 9862 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:16,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:16,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:16,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:18,086 INFO L124 PetriNetUnfolderBase]: 4165/7067 cut-off events. [2024-06-14 14:17:18,087 INFO L125 PetriNetUnfolderBase]: For 966752/966752 co-relation queries the response was YES. [2024-06-14 14:17:18,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53079 conditions, 7067 events. 4165/7067 cut-off events. For 966752/966752 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50395 event pairs, 751 based on Foata normal form. 1/7061 useless extension candidates. Maximal degree in co-relation 52834. Up to 6070 conditions per place. [2024-06-14 14:17:18,218 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 509 selfloop transitions, 230 changer transitions 0/746 dead transitions. [2024-06-14 14:17:18,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 746 transitions, 11692 flow [2024-06-14 14:17:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:17:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:17:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-14 14:17:18,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:17:18,219 INFO L175 Difference]: Start difference. First operand has 534 places, 718 transitions, 9862 flow. Second operand 11 states and 253 transitions. [2024-06-14 14:17:18,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 746 transitions, 11692 flow [2024-06-14 14:17:28,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 746 transitions, 11222 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:17:28,174 INFO L231 Difference]: Finished difference. Result has 535 places, 718 transitions, 9858 flow [2024-06-14 14:17:28,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9392, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9858, PETRI_PLACES=535, PETRI_TRANSITIONS=718} [2024-06-14 14:17:28,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-14 14:17:28,175 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 718 transitions, 9858 flow [2024-06-14 14:17:28,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:28,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:28,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:28,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-14 14:17:28,176 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:28,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash 177155357, now seen corresponding path program 17 times [2024-06-14 14:17:28,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:28,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762602867] [2024-06-14 14:17:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:28,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:28,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:28,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762602867] [2024-06-14 14:17:28,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762602867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:28,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:28,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:28,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15682124] [2024-06-14 14:17:28,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:28,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:28,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:28,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:28,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:28,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 718 transitions, 9858 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:28,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:28,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:28,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:30,336 INFO L124 PetriNetUnfolderBase]: 4162/7063 cut-off events. [2024-06-14 14:17:30,336 INFO L125 PetriNetUnfolderBase]: For 969372/969372 co-relation queries the response was YES. [2024-06-14 14:17:30,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53003 conditions, 7063 events. 4162/7063 cut-off events. For 969372/969372 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50413 event pairs, 751 based on Foata normal form. 1/7057 useless extension candidates. Maximal degree in co-relation 52757. Up to 6067 conditions per place. [2024-06-14 14:17:30,466 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 232 changer transitions 0/749 dead transitions. [2024-06-14 14:17:30,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 749 transitions, 11702 flow [2024-06-14 14:17:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:17:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:17:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 308 transitions. [2024-06-14 14:17:30,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 14:17:30,468 INFO L175 Difference]: Start difference. First operand has 535 places, 718 transitions, 9858 flow. Second operand 14 states and 308 transitions. [2024-06-14 14:17:30,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 749 transitions, 11702 flow [2024-06-14 14:17:39,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 749 transitions, 11289 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:17:39,581 INFO L231 Difference]: Finished difference. Result has 541 places, 718 transitions, 9915 flow [2024-06-14 14:17:39,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9445, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9915, PETRI_PLACES=541, PETRI_TRANSITIONS=718} [2024-06-14 14:17:39,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 498 predicate places. [2024-06-14 14:17:39,581 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 718 transitions, 9915 flow [2024-06-14 14:17:39,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:39,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:39,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:39,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-14 14:17:39,582 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:39,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash 177149777, now seen corresponding path program 18 times [2024-06-14 14:17:39,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:39,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264018682] [2024-06-14 14:17:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:39,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:39,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:39,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264018682] [2024-06-14 14:17:39,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264018682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:39,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:39,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:39,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114809181] [2024-06-14 14:17:39,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:39,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:39,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:39,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:39,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 718 transitions, 9915 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:39,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:39,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:39,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:41,808 INFO L124 PetriNetUnfolderBase]: 4159/7059 cut-off events. [2024-06-14 14:17:41,809 INFO L125 PetriNetUnfolderBase]: For 972034/972034 co-relation queries the response was YES. [2024-06-14 14:17:41,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52957 conditions, 7059 events. 4159/7059 cut-off events. For 972034/972034 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50304 event pairs, 751 based on Foata normal form. 1/7053 useless extension candidates. Maximal degree in co-relation 52710. Up to 6064 conditions per place. [2024-06-14 14:17:41,928 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 230 changer transitions 0/747 dead transitions. [2024-06-14 14:17:41,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 747 transitions, 11465 flow [2024-06-14 14:17:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:17:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:17:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 290 transitions. [2024-06-14 14:17:41,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311355311355311 [2024-06-14 14:17:41,929 INFO L175 Difference]: Start difference. First operand has 541 places, 718 transitions, 9915 flow. Second operand 13 states and 290 transitions. [2024-06-14 14:17:41,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 747 transitions, 11465 flow [2024-06-14 14:17:48,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 747 transitions, 10779 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-14 14:17:48,736 INFO L231 Difference]: Finished difference. Result has 539 places, 718 transitions, 9695 flow [2024-06-14 14:17:48,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9229, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9695, PETRI_PLACES=539, PETRI_TRANSITIONS=718} [2024-06-14 14:17:48,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-14 14:17:48,736 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 718 transitions, 9695 flow [2024-06-14 14:17:48,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:48,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:48,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:48,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-14 14:17:48,737 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:48,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:48,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2055341479, now seen corresponding path program 19 times [2024-06-14 14:17:48,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:48,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531897840] [2024-06-14 14:17:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:48,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:49,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:49,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531897840] [2024-06-14 14:17:49,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531897840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:49,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:49,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:17:49,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633655644] [2024-06-14 14:17:49,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:49,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:17:49,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:49,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:17:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:17:49,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:49,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 718 transitions, 9695 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:49,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:49,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:49,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:51,349 INFO L124 PetriNetUnfolderBase]: 4180/7106 cut-off events. [2024-06-14 14:17:51,349 INFO L125 PetriNetUnfolderBase]: For 1006465/1006471 co-relation queries the response was YES. [2024-06-14 14:17:51,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53097 conditions, 7106 events. 4180/7106 cut-off events. For 1006465/1006471 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 50816 event pairs, 748 based on Foata normal form. 5/7106 useless extension candidates. Maximal degree in co-relation 52850. Up to 6202 conditions per place. [2024-06-14 14:17:51,478 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 611 selfloop transitions, 142 changer transitions 0/760 dead transitions. [2024-06-14 14:17:51,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 760 transitions, 11958 flow [2024-06-14 14:17:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:17:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:17:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 324 transitions. [2024-06-14 14:17:51,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-14 14:17:51,479 INFO L175 Difference]: Start difference. First operand has 539 places, 718 transitions, 9695 flow. Second operand 15 states and 324 transitions. [2024-06-14 14:17:51,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 760 transitions, 11958 flow [2024-06-14 14:18:00,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 760 transitions, 11447 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-14 14:18:00,591 INFO L231 Difference]: Finished difference. Result has 541 places, 727 transitions, 9585 flow [2024-06-14 14:18:00,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9184, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9585, PETRI_PLACES=541, PETRI_TRANSITIONS=727} [2024-06-14 14:18:00,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 498 predicate places. [2024-06-14 14:18:00,591 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 727 transitions, 9585 flow [2024-06-14 14:18:00,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:00,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:00,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:00,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-14 14:18:00,592 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:00,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2143211985, now seen corresponding path program 20 times [2024-06-14 14:18:00,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:00,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652703018] [2024-06-14 14:18:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:00,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:00,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652703018] [2024-06-14 14:18:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652703018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:00,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:18:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187733909] [2024-06-14 14:18:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:00,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:18:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:18:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:18:00,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:18:00,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 727 transitions, 9585 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:00,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:00,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:18:00,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:03,059 INFO L124 PetriNetUnfolderBase]: 4193/7128 cut-off events. [2024-06-14 14:18:03,059 INFO L125 PetriNetUnfolderBase]: For 1029593/1029599 co-relation queries the response was YES. [2024-06-14 14:18:03,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53265 conditions, 7128 events. 4193/7128 cut-off events. For 1029593/1029599 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 51000 event pairs, 748 based on Foata normal form. 5/7128 useless extension candidates. Maximal degree in co-relation 53017. Up to 6116 conditions per place. [2024-06-14 14:18:03,192 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 214 changer transitions 0/769 dead transitions. [2024-06-14 14:18:03,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 769 transitions, 12145 flow [2024-06-14 14:18:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:18:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:18:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 316 transitions. [2024-06-14 14:18:03,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-14 14:18:03,194 INFO L175 Difference]: Start difference. First operand has 541 places, 727 transitions, 9585 flow. Second operand 14 states and 316 transitions. [2024-06-14 14:18:03,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 769 transitions, 12145 flow [2024-06-14 14:18:12,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 769 transitions, 11938 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-14 14:18:12,617 INFO L231 Difference]: Finished difference. Result has 545 places, 733 transitions, 9892 flow [2024-06-14 14:18:12,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9378, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9892, PETRI_PLACES=545, PETRI_TRANSITIONS=733} [2024-06-14 14:18:12,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 502 predicate places. [2024-06-14 14:18:12,618 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 733 transitions, 9892 flow [2024-06-14 14:18:12,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:12,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:12,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:12,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-14 14:18:12,619 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:12,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1089778609, now seen corresponding path program 21 times [2024-06-14 14:18:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:12,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114365903] [2024-06-14 14:18:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:12,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:12,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114365903] [2024-06-14 14:18:12,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114365903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:12,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:12,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:18:12,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642090276] [2024-06-14 14:18:12,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:12,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:18:12,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:18:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:18:12,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:18:12,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 733 transitions, 9892 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:12,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:12,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:18:12,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:15,108 INFO L124 PetriNetUnfolderBase]: 4214/7163 cut-off events. [2024-06-14 14:18:15,108 INFO L125 PetriNetUnfolderBase]: For 1064937/1064943 co-relation queries the response was YES. [2024-06-14 14:18:15,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54230 conditions, 7163 events. 4214/7163 cut-off events. For 1064937/1064943 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51275 event pairs, 747 based on Foata normal form. 5/7163 useless extension candidates. Maximal degree in co-relation 53980. Up to 6140 conditions per place. [2024-06-14 14:18:15,238 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 224 changer transitions 0/779 dead transitions. [2024-06-14 14:18:15,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 779 transitions, 12217 flow [2024-06-14 14:18:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-14 14:18:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-14 14:18:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 347 transitions. [2024-06-14 14:18:15,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163690476190477 [2024-06-14 14:18:15,240 INFO L175 Difference]: Start difference. First operand has 545 places, 733 transitions, 9892 flow. Second operand 16 states and 347 transitions. [2024-06-14 14:18:15,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 779 transitions, 12217 flow [2024-06-14 14:18:25,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 779 transitions, 11928 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 14:18:25,024 INFO L231 Difference]: Finished difference. Result has 553 places, 742 transitions, 10200 flow [2024-06-14 14:18:25,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10200, PETRI_PLACES=553, PETRI_TRANSITIONS=742} [2024-06-14 14:18:25,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 510 predicate places. [2024-06-14 14:18:25,025 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 742 transitions, 10200 flow [2024-06-14 14:18:25,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:25,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:25,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:25,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-14 14:18:25,026 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:25,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1599965915, now seen corresponding path program 22 times [2024-06-14 14:18:25,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:25,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219121711] [2024-06-14 14:18:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:25,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:25,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:25,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219121711] [2024-06-14 14:18:25,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219121711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:25,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:25,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:18:25,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656203446] [2024-06-14 14:18:25,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:25,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:18:25,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:18:25,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:18:25,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:18:25,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 742 transitions, 10200 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:25,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:25,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:18:25,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:27,529 INFO L124 PetriNetUnfolderBase]: 4211/7159 cut-off events. [2024-06-14 14:18:27,529 INFO L125 PetriNetUnfolderBase]: For 1067666/1067672 co-relation queries the response was YES. [2024-06-14 14:18:27,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54618 conditions, 7159 events. 4211/7159 cut-off events. For 1067666/1067672 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51276 event pairs, 747 based on Foata normal form. 5/7159 useless extension candidates. Maximal degree in co-relation 54365. Up to 6137 conditions per place. [2024-06-14 14:18:27,662 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 550 selfloop transitions, 224 changer transitions 0/781 dead transitions. [2024-06-14 14:18:27,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 781 transitions, 12432 flow [2024-06-14 14:18:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-14 14:18:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-14 14:18:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 383 transitions. [2024-06-14 14:18:27,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066137566137566 [2024-06-14 14:18:27,664 INFO L175 Difference]: Start difference. First operand has 553 places, 742 transitions, 10200 flow. Second operand 18 states and 383 transitions. [2024-06-14 14:18:27,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 781 transitions, 12432 flow [2024-06-14 14:18:36,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 781 transitions, 12015 flow, removed 26 selfloop flow, removed 14 redundant places. [2024-06-14 14:18:36,215 INFO L231 Difference]: Finished difference. Result has 557 places, 742 transitions, 10237 flow [2024-06-14 14:18:36,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9783, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10237, PETRI_PLACES=557, PETRI_TRANSITIONS=742} [2024-06-14 14:18:36,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 514 predicate places. [2024-06-14 14:18:36,216 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 742 transitions, 10237 flow [2024-06-14 14:18:36,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:36,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:36,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:36,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-14 14:18:36,217 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:36,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1763001519, now seen corresponding path program 23 times [2024-06-14 14:18:36,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:36,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662219479] [2024-06-14 14:18:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:36,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:36,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:36,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662219479] [2024-06-14 14:18:36,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662219479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:36,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:36,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:18:36,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637059170] [2024-06-14 14:18:36,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:36,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:18:36,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:18:36,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:18:36,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:18:36,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 742 transitions, 10237 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:36,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:36,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:18:36,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:38,653 INFO L124 PetriNetUnfolderBase]: 4208/7155 cut-off events. [2024-06-14 14:18:38,653 INFO L125 PetriNetUnfolderBase]: For 1070601/1070607 co-relation queries the response was YES. [2024-06-14 14:18:38,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54512 conditions, 7155 events. 4208/7155 cut-off events. For 1070601/1070607 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51253 event pairs, 748 based on Foata normal form. 5/7155 useless extension candidates. Maximal degree in co-relation 54260. Up to 6136 conditions per place. [2024-06-14 14:18:38,781 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 218 changer transitions 0/780 dead transitions. [2024-06-14 14:18:38,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 780 transitions, 12767 flow [2024-06-14 14:18:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-14 14:18:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-14 14:18:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 352 transitions. [2024-06-14 14:18:38,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 14:18:38,782 INFO L175 Difference]: Start difference. First operand has 557 places, 742 transitions, 10237 flow. Second operand 16 states and 352 transitions. [2024-06-14 14:18:38,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 780 transitions, 12767 flow [2024-06-14 14:18:48,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 780 transitions, 12317 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-06-14 14:18:48,270 INFO L231 Difference]: Finished difference. Result has 557 places, 742 transitions, 10229 flow [2024-06-14 14:18:48,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9787, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10229, PETRI_PLACES=557, PETRI_TRANSITIONS=742} [2024-06-14 14:18:48,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 514 predicate places. [2024-06-14 14:18:48,271 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 742 transitions, 10229 flow [2024-06-14 14:18:48,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:48,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:48,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:48,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-14 14:18:48,271 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:48,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:48,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1263779285, now seen corresponding path program 24 times [2024-06-14 14:18:48,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:48,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839510121] [2024-06-14 14:18:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:48,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:48,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:48,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839510121] [2024-06-14 14:18:48,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839510121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:48,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:48,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:18:48,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782639197] [2024-06-14 14:18:48,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:48,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:18:48,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:18:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:18:48,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:18:48,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 742 transitions, 10229 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:48,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:48,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:18:48,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:50,735 INFO L124 PetriNetUnfolderBase]: 4205/7151 cut-off events. [2024-06-14 14:18:50,735 INFO L125 PetriNetUnfolderBase]: For 1073044/1073050 co-relation queries the response was YES. [2024-06-14 14:18:50,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54415 conditions, 7151 events. 4205/7151 cut-off events. For 1073044/1073050 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51223 event pairs, 748 based on Foata normal form. 5/7151 useless extension candidates. Maximal degree in co-relation 54162. Up to 6145 conditions per place. [2024-06-14 14:18:50,862 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 564 selfloop transitions, 208 changer transitions 0/779 dead transitions. [2024-06-14 14:18:50,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 779 transitions, 12761 flow [2024-06-14 14:18:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:18:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:18:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 333 transitions. [2024-06-14 14:18:50,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-14 14:18:50,863 INFO L175 Difference]: Start difference. First operand has 557 places, 742 transitions, 10229 flow. Second operand 15 states and 333 transitions. [2024-06-14 14:18:50,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 779 transitions, 12761 flow [2024-06-14 14:18:59,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 779 transitions, 12305 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-06-14 14:18:59,355 INFO L231 Difference]: Finished difference. Result has 558 places, 742 transitions, 10195 flow [2024-06-14 14:18:59,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9773, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10195, PETRI_PLACES=558, PETRI_TRANSITIONS=742} [2024-06-14 14:18:59,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 515 predicate places. [2024-06-14 14:18:59,356 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 742 transitions, 10195 flow [2024-06-14 14:18:59,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:59,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:59,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:59,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-14 14:18:59,356 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:59,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1822528503, now seen corresponding path program 25 times [2024-06-14 14:18:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:59,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169673011] [2024-06-14 14:18:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:59,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:59,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169673011] [2024-06-14 14:18:59,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169673011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:59,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:59,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:18:59,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707127047] [2024-06-14 14:18:59,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:59,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:18:59,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:59,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:18:59,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:18:59,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:18:59,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 742 transitions, 10195 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:59,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:59,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:18:59,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:01,757 INFO L124 PetriNetUnfolderBase]: 4258/7226 cut-off events. [2024-06-14 14:19:01,758 INFO L125 PetriNetUnfolderBase]: For 1154614/1154614 co-relation queries the response was YES. [2024-06-14 14:19:01,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55834 conditions, 7226 events. 4258/7226 cut-off events. For 1154614/1154614 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 51840 event pairs, 751 based on Foata normal form. 1/7220 useless extension candidates. Maximal degree in co-relation 55580. Up to 5843 conditions per place. [2024-06-14 14:19:01,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 407 changer transitions 0/802 dead transitions. [2024-06-14 14:19:01,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 802 transitions, 13361 flow [2024-06-14 14:19:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:19:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:19:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 303 transitions. [2024-06-14 14:19:01,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554945054945055 [2024-06-14 14:19:01,883 INFO L175 Difference]: Start difference. First operand has 558 places, 742 transitions, 10195 flow. Second operand 13 states and 303 transitions. [2024-06-14 14:19:01,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 802 transitions, 13361 flow [2024-06-14 14:19:10,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 802 transitions, 12886 flow, removed 3 selfloop flow, removed 16 redundant places. [2024-06-14 14:19:10,995 INFO L231 Difference]: Finished difference. Result has 556 places, 763 transitions, 10921 flow [2024-06-14 14:19:10,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9720, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10921, PETRI_PLACES=556, PETRI_TRANSITIONS=763} [2024-06-14 14:19:10,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 513 predicate places. [2024-06-14 14:19:10,995 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 763 transitions, 10921 flow [2024-06-14 14:19:10,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:10,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:10,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:10,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-14 14:19:10,996 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:10,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash 247294381, now seen corresponding path program 26 times [2024-06-14 14:19:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:10,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689002061] [2024-06-14 14:19:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:11,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:11,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689002061] [2024-06-14 14:19:11,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689002061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:11,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:11,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:19:11,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475930364] [2024-06-14 14:19:11,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:11,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:19:11,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:19:11,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:19:11,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:19:11,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 763 transitions, 10921 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:11,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:11,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:19:11,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:13,433 INFO L124 PetriNetUnfolderBase]: 4271/7248 cut-off events. [2024-06-14 14:19:13,433 INFO L125 PetriNetUnfolderBase]: For 1182146/1182146 co-relation queries the response was YES. [2024-06-14 14:19:13,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56866 conditions, 7248 events. 4271/7248 cut-off events. For 1182146/1182146 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 51982 event pairs, 751 based on Foata normal form. 1/7242 useless extension candidates. Maximal degree in co-relation 56610. Up to 5858 conditions per place. [2024-06-14 14:19:13,560 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 399 selfloop transitions, 408 changer transitions 0/814 dead transitions. [2024-06-14 14:19:13,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 814 transitions, 13947 flow [2024-06-14 14:19:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:19:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:19:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 308 transitions. [2024-06-14 14:19:13,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-14 14:19:13,562 INFO L175 Difference]: Start difference. First operand has 556 places, 763 transitions, 10921 flow. Second operand 13 states and 308 transitions. [2024-06-14 14:19:13,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 814 transitions, 13947 flow [2024-06-14 14:19:23,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 814 transitions, 13316 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-14 14:19:23,339 INFO L231 Difference]: Finished difference. Result has 561 places, 769 transitions, 11214 flow [2024-06-14 14:19:23,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10326, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11214, PETRI_PLACES=561, PETRI_TRANSITIONS=769} [2024-06-14 14:19:23,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 518 predicate places. [2024-06-14 14:19:23,340 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 769 transitions, 11214 flow [2024-06-14 14:19:23,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:23,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:23,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:23,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-14 14:19:23,340 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:23,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash -388273877, now seen corresponding path program 27 times [2024-06-14 14:19:23,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:23,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888710917] [2024-06-14 14:19:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:23,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:23,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:23,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888710917] [2024-06-14 14:19:23,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888710917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:23,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:23,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:19:23,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331482386] [2024-06-14 14:19:23,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:23,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:19:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:19:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:19:23,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:19:23,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 769 transitions, 11214 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:23,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:23,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:19:23,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:25,627 INFO L124 PetriNetUnfolderBase]: 4268/7244 cut-off events. [2024-06-14 14:19:25,627 INFO L125 PetriNetUnfolderBase]: For 1171886/1171886 co-relation queries the response was YES. [2024-06-14 14:19:25,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56756 conditions, 7244 events. 4268/7244 cut-off events. For 1171886/1171886 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 51940 event pairs, 751 based on Foata normal form. 1/7238 useless extension candidates. Maximal degree in co-relation 56500. Up to 5855 conditions per place. [2024-06-14 14:19:25,758 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 402 changer transitions 0/807 dead transitions. [2024-06-14 14:19:25,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 807 transitions, 13820 flow [2024-06-14 14:19:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:19:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:19:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-14 14:19:25,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-14 14:19:25,759 INFO L175 Difference]: Start difference. First operand has 561 places, 769 transitions, 11214 flow. Second operand 10 states and 248 transitions. [2024-06-14 14:19:25,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 807 transitions, 13820 flow Killed by 15