./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:40:26,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:40:26,902 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:40:26,905 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:40:26,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:40:26,918 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:40:26,919 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:40:26,919 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:40:26,920 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:40:26,920 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:40:26,920 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:40:26,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:40:26,921 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:40:26,921 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:40:26,922 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:40:26,922 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:40:26,922 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:40:26,923 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:40:26,923 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:40:26,923 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:40:26,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:40:26,936 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:40:26,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:40:26,937 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:40:26,937 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:40:26,937 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:40:26,937 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:40:26,938 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:40:26,938 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:40:26,938 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:40:26,938 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:40:26,939 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:40:26,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:40:26,939 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:40:26,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:40:26,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:40:26,940 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:40:26,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:40:26,940 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:40:26,940 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:40:26,940 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:40:26,941 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:40:26,941 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:40:26,941 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:40:27,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:40:27,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:40:27,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:40:27,227 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:40:27,228 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:40:27,229 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 20:40:27,341 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:40:27,341 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:40:27,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:40:28,391 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:40:28,610 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:40:28,611 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:40:28,622 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70047c060/1087d0cbb5e2454fa0925fb206ef6104/FLAG1751858f3 [2024-06-03 20:40:28,631 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70047c060/1087d0cbb5e2454fa0925fb206ef6104 [2024-06-03 20:40:28,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:40:28,634 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:40:28,634 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:40:28,635 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:40:28,639 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:40:28,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:40:27" (1/2) ... [2024-06-03 20:40:28,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47a1a8aa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:40:28, skipping insertion in model container [2024-06-03 20:40:28,640 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:40:27" (1/2) ... [2024-06-03 20:40:28,641 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b3e388c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:40:28, skipping insertion in model container [2024-06-03 20:40:28,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:40:28" (2/2) ... [2024-06-03 20:40:28,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47a1a8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:28, skipping insertion in model container [2024-06-03 20:40:28,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:40:28" (2/2) ... [2024-06-03 20:40:28,643 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:40:28,680 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:40:28,682 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-03 20:40:28,682 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-03 20:40:28,682 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-03 20:40:28,682 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:40:28,682 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-03 20:40:28,717 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:40:28,990 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:40:28,999 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:40:29,115 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:40:29,158 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:40:29,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29 WrapperNode [2024-06-03 20:40:29,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:40:29,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:40:29,160 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:40:29,160 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:40:29,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,226 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-03 20:40:29,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:40:29,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:40:29,227 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:40:29,227 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:40:29,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,239 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,263 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:40:29,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,269 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,271 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,272 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,274 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:40:29,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:40:29,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:40:29,274 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:40:29,275 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (1/1) ... [2024-06-03 20:40:29,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:40:29,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:40:29,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:40:29,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:40:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:40:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:40:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:40:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:40:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:40:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:40:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:40:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:40:29,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:40:29,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:40:29,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:40:29,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:40:29,330 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:40:29,447 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:40:29,449 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:40:29,703 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:40:29,703 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:40:29,763 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:40:29,763 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:40:29,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:40:29 BoogieIcfgContainer [2024-06-03 20:40:29,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:40:29,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:40:29,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:40:29,768 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:40:29,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:40:27" (1/4) ... [2024-06-03 20:40:29,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257ec681 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:40:29, skipping insertion in model container [2024-06-03 20:40:29,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:40:28" (2/4) ... [2024-06-03 20:40:29,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257ec681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:40:29, skipping insertion in model container [2024-06-03 20:40:29,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:29" (3/4) ... [2024-06-03 20:40:29,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257ec681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:40:29, skipping insertion in model container [2024-06-03 20:40:29,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:40:29" (4/4) ... [2024-06-03 20:40:29,770 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:40:29,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:40:29,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:40:29,782 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:40:29,811 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:40:29,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:40:29,850 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 20:40:29,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:40:29,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:40:29,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:40:29,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 20:40:29,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:40:29,865 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;@52fc7e73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:40:29,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:40:29,867 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:40:29,867 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:40:29,868 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:40:29,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:29,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:40:29,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:29,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1782945868, now seen corresponding path program 1 times [2024-06-03 20:40:29,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:29,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623357918] [2024-06-03 20:40:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:29,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623357918] [2024-06-03 20:40:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623357918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:30,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:30,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:40:30,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901976580] [2024-06-03 20:40:30,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:30,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:40:30,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:40:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:40:30,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-03 20:40:30,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:30,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:30,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-03 20:40:30,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:30,760 INFO L124 PetriNetUnfolderBase]: 430/730 cut-off events. [2024-06-03 20:40:30,760 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-03 20:40:30,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 730 events. 430/730 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3710 event pairs, 241 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 1440. Up to 672 conditions per place. [2024-06-03 20:40:30,773 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 20:40:30,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-03 20:40:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:40:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:40:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-03 20:40:30,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-03 20:40:30,785 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-03 20:40:30,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-03 20:40:30,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:30,791 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 20:40:30,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 20:40:30,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 20:40:30,796 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 20:40:30,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:30,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:30,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:30,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:40:30,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:30,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash -116908628, now seen corresponding path program 1 times [2024-06-03 20:40:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:30,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133925118] [2024-06-03 20:40:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:30,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:31,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:31,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133925118] [2024-06-03 20:40:31,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133925118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:31,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:31,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:31,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295428475] [2024-06-03 20:40:31,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:31,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:31,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:31,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:31,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:31,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:31,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:31,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:31,379 INFO L124 PetriNetUnfolderBase]: 755/1248 cut-off events. [2024-06-03 20:40:31,380 INFO L125 PetriNetUnfolderBase]: For 222/236 co-relation queries the response was YES. [2024-06-03 20:40:31,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 1248 events. 755/1248 cut-off events. For 222/236 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6102 event pairs, 249 based on Foata normal form. 13/1224 useless extension candidates. Maximal degree in co-relation 2828. Up to 1093 conditions per place. [2024-06-03 20:40:31,386 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 37 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-03 20:40:31,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 224 flow [2024-06-03 20:40:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:40:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:40:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-03 20:40:31,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 20:40:31,391 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 102 transitions. [2024-06-03 20:40:31,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 224 flow [2024-06-03 20:40:31,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:40:31,395 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-03 20:40:31,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-03 20:40:31,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-03 20:40:31,396 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-03 20:40:31,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:31,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:31,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:31,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:40:31,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:31,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash -214704722, now seen corresponding path program 1 times [2024-06-03 20:40:31,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:31,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098439378] [2024-06-03 20:40:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:31,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:31,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:31,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098439378] [2024-06-03 20:40:31,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098439378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:31,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:31,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:40:31,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404715890] [2024-06-03 20:40:31,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:31,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:40:31,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:31,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:40:31,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:40:31,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:31,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:31,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:31,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:31,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:31,929 INFO L124 PetriNetUnfolderBase]: 758/1252 cut-off events. [2024-06-03 20:40:31,929 INFO L125 PetriNetUnfolderBase]: For 629/629 co-relation queries the response was YES. [2024-06-03 20:40:31,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3094 conditions, 1252 events. 758/1252 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6294 event pairs, 224 based on Foata normal form. 6/1254 useless extension candidates. Maximal degree in co-relation 3077. Up to 1074 conditions per place. [2024-06-03 20:40:31,936 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 44 selfloop transitions, 14 changer transitions 0/65 dead transitions. [2024-06-03 20:40:31,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 325 flow [2024-06-03 20:40:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-03 20:40:31,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-03 20:40:31,939 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 5 states and 128 transitions. [2024-06-03 20:40:31,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 325 flow [2024-06-03 20:40:31,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 65 transitions, 312 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:31,943 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 202 flow [2024-06-03 20:40:31,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-06-03 20:40:31,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-03 20:40:31,945 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 202 flow [2024-06-03 20:40:31,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:31,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:31,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:31,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:40:31,945 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)] === [2024-06-03 20:40:31,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1910852492, now seen corresponding path program 1 times [2024-06-03 20:40:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:31,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523491621] [2024-06-03 20:40:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:32,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523491621] [2024-06-03 20:40:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523491621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:32,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:32,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:40:32,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73101575] [2024-06-03 20:40:32,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:32,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:40:32,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:32,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:40:32,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:40:32,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:32,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 202 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) [2024-06-03 20:40:32,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:32,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:32,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:32,487 INFO L124 PetriNetUnfolderBase]: 742/1224 cut-off events. [2024-06-03 20:40:32,488 INFO L125 PetriNetUnfolderBase]: For 1407/1407 co-relation queries the response was YES. [2024-06-03 20:40:32,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3782 conditions, 1224 events. 742/1224 cut-off events. For 1407/1407 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6153 event pairs, 244 based on Foata normal form. 6/1226 useless extension candidates. Maximal degree in co-relation 3763. Up to 1058 conditions per place. [2024-06-03 20:40:32,494 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 42 selfloop transitions, 14 changer transitions 0/63 dead transitions. [2024-06-03 20:40:32,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 364 flow [2024-06-03 20:40:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:40:32,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-03 20:40:32,497 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 202 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:40:32,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 364 flow [2024-06-03 20:40:32,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 348 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-03 20:40:32,503 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 224 flow [2024-06-03 20:40:32,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-03 20:40:32,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-03 20:40:32,505 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 224 flow [2024-06-03 20:40:32,505 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) [2024-06-03 20:40:32,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:32,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:32,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:40:32,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:32,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:32,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2094094253, now seen corresponding path program 1 times [2024-06-03 20:40:32,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:32,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486283126] [2024-06-03 20:40:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:32,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:32,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486283126] [2024-06-03 20:40:32,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486283126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:32,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:32,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:32,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818277124] [2024-06-03 20:40:32,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:32,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:32,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:32,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:32,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:32,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:32,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:32,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:32,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:32,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:33,042 INFO L124 PetriNetUnfolderBase]: 951/1557 cut-off events. [2024-06-03 20:40:33,043 INFO L125 PetriNetUnfolderBase]: For 2111/2111 co-relation queries the response was YES. [2024-06-03 20:40:33,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4954 conditions, 1557 events. 951/1557 cut-off events. For 2111/2111 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7820 event pairs, 278 based on Foata normal form. 3/1556 useless extension candidates. Maximal degree in co-relation 4933. Up to 1273 conditions per place. [2024-06-03 20:40:33,050 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 21 changer transitions 0/80 dead transitions. [2024-06-03 20:40:33,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 506 flow [2024-06-03 20:40:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:40:33,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-03 20:40:33,052 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 224 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:40:33,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 506 flow [2024-06-03 20:40:33,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 478 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:33,055 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 317 flow [2024-06-03 20:40:33,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=317, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2024-06-03 20:40:33,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-03 20:40:33,056 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 317 flow [2024-06-03 20:40:33,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:33,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:33,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:33,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:40:33,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:33,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:33,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1060815169, now seen corresponding path program 1 times [2024-06-03 20:40:33,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:33,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019661936] [2024-06-03 20:40:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:33,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:33,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:33,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019661936] [2024-06-03 20:40:33,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019661936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:33,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:33,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:33,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067206408] [2024-06-03 20:40:33,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:33,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:33,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:33,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:33,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:33,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 317 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) [2024-06-03 20:40:33,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:33,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:33,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:33,531 INFO L124 PetriNetUnfolderBase]: 836/1377 cut-off events. [2024-06-03 20:40:33,531 INFO L125 PetriNetUnfolderBase]: For 3623/3623 co-relation queries the response was YES. [2024-06-03 20:40:33,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5066 conditions, 1377 events. 836/1377 cut-off events. For 3623/3623 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7091 event pairs, 234 based on Foata normal form. 30/1403 useless extension candidates. Maximal degree in co-relation 5043. Up to 1063 conditions per place. [2024-06-03 20:40:33,540 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2024-06-03 20:40:33,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 82 transitions, 575 flow [2024-06-03 20:40:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:40:33,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-03 20:40:33,542 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 317 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:40:33,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 82 transitions, 575 flow [2024-06-03 20:40:33,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 541 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:33,547 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 360 flow [2024-06-03 20:40:33,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-03 20:40:33,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-03 20:40:33,548 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 360 flow [2024-06-03 20:40:33,548 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) [2024-06-03 20:40:33,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:33,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:33,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:40:33,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:33,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash -492405561, now seen corresponding path program 1 times [2024-06-03 20:40:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:33,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281645404] [2024-06-03 20:40:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:33,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:33,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:33,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281645404] [2024-06-03 20:40:33,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281645404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:33,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:33,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053556298] [2024-06-03 20:40:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:33,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:33,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 360 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:33,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:33,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:33,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:33,999 INFO L124 PetriNetUnfolderBase]: 1053/1737 cut-off events. [2024-06-03 20:40:33,999 INFO L125 PetriNetUnfolderBase]: For 4511/4511 co-relation queries the response was YES. [2024-06-03 20:40:34,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6511 conditions, 1737 events. 1053/1737 cut-off events. For 4511/4511 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9005 event pairs, 293 based on Foata normal form. 3/1736 useless extension candidates. Maximal degree in co-relation 6486. Up to 1433 conditions per place. [2024-06-03 20:40:34,009 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 25 changer transitions 0/87 dead transitions. [2024-06-03 20:40:34,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 660 flow [2024-06-03 20:40:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:40:34,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-03 20:40:34,010 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 360 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:40:34,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 660 flow [2024-06-03 20:40:34,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 623 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:34,018 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 418 flow [2024-06-03 20:40:34,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-03 20:40:34,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-03 20:40:34,019 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 418 flow [2024-06-03 20:40:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:34,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:34,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:34,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:40:34,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:34,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash 718001223, now seen corresponding path program 2 times [2024-06-03 20:40:34,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:34,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781705861] [2024-06-03 20:40:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:34,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:34,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:34,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781705861] [2024-06-03 20:40:34,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781705861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:34,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:34,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:34,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612238468] [2024-06-03 20:40:34,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:34,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:34,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:34,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:40:34,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 418 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:34,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:34,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:40:34,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:34,612 INFO L124 PetriNetUnfolderBase]: 1045/1725 cut-off events. [2024-06-03 20:40:34,612 INFO L125 PetriNetUnfolderBase]: For 5115/5115 co-relation queries the response was YES. [2024-06-03 20:40:34,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6501 conditions, 1725 events. 1045/1725 cut-off events. For 5115/5115 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8915 event pairs, 283 based on Foata normal form. 3/1724 useless extension candidates. Maximal degree in co-relation 6475. Up to 1425 conditions per place. [2024-06-03 20:40:34,621 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 58 selfloop transitions, 28 changer transitions 0/92 dead transitions. [2024-06-03 20:40:34,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 680 flow [2024-06-03 20:40:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 20:40:34,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-03 20:40:34,623 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 418 flow. Second operand 9 states and 187 transitions. [2024-06-03 20:40:34,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 680 flow [2024-06-03 20:40:34,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 608 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:34,629 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 422 flow [2024-06-03 20:40:34,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=422, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-03 20:40:34,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-03 20:40:34,630 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 422 flow [2024-06-03 20:40:34,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:34,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:34,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:34,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:40:34,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:34,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1457120507, now seen corresponding path program 1 times [2024-06-03 20:40:34,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:34,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269995608] [2024-06-03 20:40:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:34,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:34,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:34,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269995608] [2024-06-03 20:40:34,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269995608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:34,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:34,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:40:34,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490119739] [2024-06-03 20:40:34,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:34,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:40:34,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:40:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:40:34,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:34,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:34,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:34,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:34,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:35,026 INFO L124 PetriNetUnfolderBase]: 998/1645 cut-off events. [2024-06-03 20:40:35,026 INFO L125 PetriNetUnfolderBase]: For 6756/6805 co-relation queries the response was YES. [2024-06-03 20:40:35,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6464 conditions, 1645 events. 998/1645 cut-off events. For 6756/6805 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8720 event pairs, 529 based on Foata normal form. 16/1617 useless extension candidates. Maximal degree in co-relation 6435. Up to 1480 conditions per place. [2024-06-03 20:40:35,036 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 59 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-03 20:40:35,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 618 flow [2024-06-03 20:40:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:40:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:40:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-03 20:40:35,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:40:35,037 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 422 flow. Second operand 4 states and 96 transitions. [2024-06-03 20:40:35,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 618 flow [2024-06-03 20:40:35,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 535 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:40:35,042 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 408 flow [2024-06-03 20:40:35,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=408, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2024-06-03 20:40:35,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-03 20:40:35,043 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 408 flow [2024-06-03 20:40:35,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:35,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:35,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:35,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:40:35,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:35,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1429467628, now seen corresponding path program 1 times [2024-06-03 20:40:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:35,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061973781] [2024-06-03 20:40:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:35,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:35,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:35,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061973781] [2024-06-03 20:40:35,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061973781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:35,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:35,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:35,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082771509] [2024-06-03 20:40:35,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:35,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:35,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:35,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:35,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:35,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:40:35,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:35,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:35,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:40:35,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:35,661 INFO L124 PetriNetUnfolderBase]: 1187/1980 cut-off events. [2024-06-03 20:40:35,661 INFO L125 PetriNetUnfolderBase]: For 7844/7855 co-relation queries the response was YES. [2024-06-03 20:40:35,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7724 conditions, 1980 events. 1187/1980 cut-off events. For 7844/7855 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10627 event pairs, 203 based on Foata normal form. 6/1984 useless extension candidates. Maximal degree in co-relation 7695. Up to 1551 conditions per place. [2024-06-03 20:40:35,671 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 95 selfloop transitions, 21 changer transitions 0/122 dead transitions. [2024-06-03 20:40:35,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 122 transitions, 907 flow [2024-06-03 20:40:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-03 20:40:35,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-03 20:40:35,673 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 408 flow. Second operand 9 states and 194 transitions. [2024-06-03 20:40:35,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 122 transitions, 907 flow [2024-06-03 20:40:35,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 122 transitions, 901 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-03 20:40:35,680 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 567 flow [2024-06-03 20:40:35,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=567, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-03 20:40:35,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-03 20:40:35,681 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 567 flow [2024-06-03 20:40:35,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:35,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:35,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:35,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:40:35,681 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:35,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash 778611006, now seen corresponding path program 2 times [2024-06-03 20:40:35,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:35,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551963657] [2024-06-03 20:40:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:35,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:35,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551963657] [2024-06-03 20:40:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551963657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:35,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:35,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:35,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228801876] [2024-06-03 20:40:35,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:35,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:35,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:36,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:36,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 567 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:36,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:36,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:36,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:36,295 INFO L124 PetriNetUnfolderBase]: 1352/2237 cut-off events. [2024-06-03 20:40:36,295 INFO L125 PetriNetUnfolderBase]: For 12298/12300 co-relation queries the response was YES. [2024-06-03 20:40:36,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9719 conditions, 2237 events. 1352/2237 cut-off events. For 12298/12300 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12218 event pairs, 198 based on Foata normal form. 6/2239 useless extension candidates. Maximal degree in co-relation 9683. Up to 1383 conditions per place. [2024-06-03 20:40:36,307 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 31 changer transitions 0/119 dead transitions. [2024-06-03 20:40:36,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 1038 flow [2024-06-03 20:40:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 20:40:36,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 20:40:36,309 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 567 flow. Second operand 6 states and 153 transitions. [2024-06-03 20:40:36,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 1038 flow [2024-06-03 20:40:36,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 119 transitions, 994 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:36,323 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 722 flow [2024-06-03 20:40:36,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=722, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-03 20:40:36,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-03 20:40:36,323 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 722 flow [2024-06-03 20:40:36,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:36,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:36,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:36,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:40:36,324 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:36,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash 765658614, now seen corresponding path program 3 times [2024-06-03 20:40:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:36,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686171829] [2024-06-03 20:40:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:36,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:36,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686171829] [2024-06-03 20:40:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686171829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:36,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:36,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:36,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940203467] [2024-06-03 20:40:36,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:36,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:36,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:40:36,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 722 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:36,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:36,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:40:36,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:36,964 INFO L124 PetriNetUnfolderBase]: 1339/2226 cut-off events. [2024-06-03 20:40:36,964 INFO L125 PetriNetUnfolderBase]: For 14933/14935 co-relation queries the response was YES. [2024-06-03 20:40:36,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10377 conditions, 2226 events. 1339/2226 cut-off events. For 14933/14935 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12164 event pairs, 404 based on Foata normal form. 6/2228 useless extension candidates. Maximal degree in co-relation 10338. Up to 1912 conditions per place. [2024-06-03 20:40:36,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 87 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2024-06-03 20:40:36,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 115 transitions, 1072 flow [2024-06-03 20:40:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 20:40:36,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 20:40:36,980 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 722 flow. Second operand 7 states and 152 transitions. [2024-06-03 20:40:36,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 115 transitions, 1072 flow [2024-06-03 20:40:36,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 115 transitions, 1028 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:36,992 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 780 flow [2024-06-03 20:40:36,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=780, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2024-06-03 20:40:36,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-03 20:40:36,993 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 780 flow [2024-06-03 20:40:36,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:36,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:36,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:36,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:40:36,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:36,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:36,994 INFO L85 PathProgramCache]: Analyzing trace with hash 783197766, now seen corresponding path program 4 times [2024-06-03 20:40:36,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:36,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879402741] [2024-06-03 20:40:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:36,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:37,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:37,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879402741] [2024-06-03 20:40:37,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879402741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:37,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:37,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:37,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952195421] [2024-06-03 20:40:37,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:37,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:37,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:37,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:37,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:37,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:37,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:37,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:37,558 INFO L124 PetriNetUnfolderBase]: 1331/2196 cut-off events. [2024-06-03 20:40:37,558 INFO L125 PetriNetUnfolderBase]: For 16663/16665 co-relation queries the response was YES. [2024-06-03 20:40:37,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10608 conditions, 2196 events. 1331/2196 cut-off events. For 16663/16665 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11897 event pairs, 431 based on Foata normal form. 4/2188 useless extension candidates. Maximal degree in co-relation 10566. Up to 1914 conditions per place. [2024-06-03 20:40:37,573 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 24 changer transitions 0/135 dead transitions. [2024-06-03 20:40:37,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 135 transitions, 1327 flow [2024-06-03 20:40:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 20:40:37,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:40:37,575 INFO L175 Difference]: Start difference. First operand has 86 places, 93 transitions, 780 flow. Second operand 6 states and 141 transitions. [2024-06-03 20:40:37,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 135 transitions, 1327 flow [2024-06-03 20:40:37,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 135 transitions, 1236 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:37,592 INFO L231 Difference]: Finished difference. Result has 90 places, 111 transitions, 1001 flow [2024-06-03 20:40:37,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1001, PETRI_PLACES=90, PETRI_TRANSITIONS=111} [2024-06-03 20:40:37,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-03 20:40:37,593 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 111 transitions, 1001 flow [2024-06-03 20:40:37,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:37,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:37,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:37,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:40:37,594 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:37,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1443610682, now seen corresponding path program 1 times [2024-06-03 20:40:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:37,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747553962] [2024-06-03 20:40:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:37,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:37,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:37,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747553962] [2024-06-03 20:40:37,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747553962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:37,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:37,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:37,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620373897] [2024-06-03 20:40:37,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:37,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:37,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:37,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:37,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:37,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:37,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 111 transitions, 1001 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:37,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:37,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:37,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:38,147 INFO L124 PetriNetUnfolderBase]: 1258/2150 cut-off events. [2024-06-03 20:40:38,147 INFO L125 PetriNetUnfolderBase]: For 18439/18440 co-relation queries the response was YES. [2024-06-03 20:40:38,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10617 conditions, 2150 events. 1258/2150 cut-off events. For 18439/18440 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11969 event pairs, 409 based on Foata normal form. 3/2148 useless extension candidates. Maximal degree in co-relation 10572. Up to 1838 conditions per place. [2024-06-03 20:40:38,162 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 91 selfloop transitions, 34 changer transitions 0/135 dead transitions. [2024-06-03 20:40:38,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 135 transitions, 1403 flow [2024-06-03 20:40:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:40:38,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-03 20:40:38,164 INFO L175 Difference]: Start difference. First operand has 90 places, 111 transitions, 1001 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:40:38,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 135 transitions, 1403 flow [2024-06-03 20:40:38,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 135 transitions, 1365 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-03 20:40:38,189 INFO L231 Difference]: Finished difference. Result has 97 places, 119 transitions, 1141 flow [2024-06-03 20:40:38,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1141, PETRI_PLACES=97, PETRI_TRANSITIONS=119} [2024-06-03 20:40:38,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-03 20:40:38,190 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 119 transitions, 1141 flow [2024-06-03 20:40:38,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:38,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:38,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:38,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:40:38,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:38,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1639372158, now seen corresponding path program 1 times [2024-06-03 20:40:38,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:38,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80644429] [2024-06-03 20:40:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:38,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:38,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:38,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80644429] [2024-06-03 20:40:38,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80644429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:38,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:38,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:38,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433393638] [2024-06-03 20:40:38,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:38,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:38,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:38,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:38,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:38,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:40:38,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 119 transitions, 1141 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:38,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:38,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:40:38,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:38,807 INFO L124 PetriNetUnfolderBase]: 1285/2149 cut-off events. [2024-06-03 20:40:38,808 INFO L125 PetriNetUnfolderBase]: For 21211/21213 co-relation queries the response was YES. [2024-06-03 20:40:38,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10827 conditions, 2149 events. 1285/2149 cut-off events. For 21211/21213 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11707 event pairs, 179 based on Foata normal form. 30/2175 useless extension candidates. Maximal degree in co-relation 10778. Up to 1359 conditions per place. [2024-06-03 20:40:38,824 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 99 selfloop transitions, 42 changer transitions 0/147 dead transitions. [2024-06-03 20:40:38,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 147 transitions, 1542 flow [2024-06-03 20:40:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-03 20:40:38,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-03 20:40:38,826 INFO L175 Difference]: Start difference. First operand has 97 places, 119 transitions, 1141 flow. Second operand 7 states and 158 transitions. [2024-06-03 20:40:38,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 147 transitions, 1542 flow [2024-06-03 20:40:38,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 147 transitions, 1450 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:38,853 INFO L231 Difference]: Finished difference. Result has 101 places, 120 transitions, 1164 flow [2024-06-03 20:40:38,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1164, PETRI_PLACES=101, PETRI_TRANSITIONS=120} [2024-06-03 20:40:38,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-03 20:40:38,854 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 120 transitions, 1164 flow [2024-06-03 20:40:38,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:38,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:38,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:38,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:40:38,855 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:38,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2046669254, now seen corresponding path program 2 times [2024-06-03 20:40:38,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:38,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460538406] [2024-06-03 20:40:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:38,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:39,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:39,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460538406] [2024-06-03 20:40:39,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460538406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:39,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:39,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:39,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658692303] [2024-06-03 20:40:39,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:39,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:39,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:39,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 120 transitions, 1164 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-03 20:40:39,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:39,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:39,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:39,453 INFO L124 PetriNetUnfolderBase]: 1371/2291 cut-off events. [2024-06-03 20:40:39,454 INFO L125 PetriNetUnfolderBase]: For 23766/23768 co-relation queries the response was YES. [2024-06-03 20:40:39,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 2291 events. 1371/2291 cut-off events. For 23766/23768 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12679 event pairs, 386 based on Foata normal form. 24/2311 useless extension candidates. Maximal degree in co-relation 11591. Up to 1833 conditions per place. [2024-06-03 20:40:39,470 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 45 changer transitions 0/150 dead transitions. [2024-06-03 20:40:39,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 150 transitions, 1588 flow [2024-06-03 20:40:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:40:39,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 20:40:39,472 INFO L175 Difference]: Start difference. First operand has 101 places, 120 transitions, 1164 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:40:39,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 150 transitions, 1588 flow [2024-06-03 20:40:39,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 150 transitions, 1513 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:39,499 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 1231 flow [2024-06-03 20:40:39,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1231, PETRI_PLACES=104, PETRI_TRANSITIONS=122} [2024-06-03 20:40:39,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-03 20:40:39,500 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 1231 flow [2024-06-03 20:40:39,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-03 20:40:39,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:39,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:39,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:40:39,501 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)] === [2024-06-03 20:40:39,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:39,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2041306874, now seen corresponding path program 3 times [2024-06-03 20:40:39,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:39,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80564440] [2024-06-03 20:40:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:39,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:39,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80564440] [2024-06-03 20:40:39,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80564440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:39,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:39,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:39,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495668780] [2024-06-03 20:40:39,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:39,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:39,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:39,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:39,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:39,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 122 transitions, 1231 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-03 20:40:39,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:39,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:39,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:40,091 INFO L124 PetriNetUnfolderBase]: 1429/2390 cut-off events. [2024-06-03 20:40:40,091 INFO L125 PetriNetUnfolderBase]: For 26038/26040 co-relation queries the response was YES. [2024-06-03 20:40:40,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12229 conditions, 2390 events. 1429/2390 cut-off events. For 26038/26040 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13405 event pairs, 412 based on Foata normal form. 16/2396 useless extension candidates. Maximal degree in co-relation 12178. Up to 2007 conditions per place. [2024-06-03 20:40:40,109 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 125 selfloop transitions, 23 changer transitions 0/154 dead transitions. [2024-06-03 20:40:40,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1679 flow [2024-06-03 20:40:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:40:40,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:40:40,112 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 1231 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:40:40,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1679 flow [2024-06-03 20:40:40,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 154 transitions, 1569 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:40,143 INFO L231 Difference]: Finished difference. Result has 106 places, 123 transitions, 1202 flow [2024-06-03 20:40:40,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1202, PETRI_PLACES=106, PETRI_TRANSITIONS=123} [2024-06-03 20:40:40,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-03 20:40:40,144 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 123 transitions, 1202 flow [2024-06-03 20:40:40,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-03 20:40:40,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:40,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:40,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:40:40,145 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:40,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:40,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2041159004, now seen corresponding path program 4 times [2024-06-03 20:40:40,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:40,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209538494] [2024-06-03 20:40:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:40,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:40,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:40,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209538494] [2024-06-03 20:40:40,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209538494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:40,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:40,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:40,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829947728] [2024-06-03 20:40:40,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:40,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:40,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:40,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:40,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:40,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 123 transitions, 1202 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:40,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:40,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:40,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:40,805 INFO L124 PetriNetUnfolderBase]: 1531/2571 cut-off events. [2024-06-03 20:40:40,805 INFO L125 PetriNetUnfolderBase]: For 30274/30276 co-relation queries the response was YES. [2024-06-03 20:40:40,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13140 conditions, 2571 events. 1531/2571 cut-off events. For 30274/30276 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14617 event pairs, 407 based on Foata normal form. 18/2585 useless extension candidates. Maximal degree in co-relation 13088. Up to 1950 conditions per place. [2024-06-03 20:40:40,824 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 51 changer transitions 0/167 dead transitions. [2024-06-03 20:40:40,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 167 transitions, 1772 flow [2024-06-03 20:40:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:40:40,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-03 20:40:40,825 INFO L175 Difference]: Start difference. First operand has 106 places, 123 transitions, 1202 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:40:40,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 167 transitions, 1772 flow [2024-06-03 20:40:40,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 1711 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:40,859 INFO L231 Difference]: Finished difference. Result has 112 places, 127 transitions, 1346 flow [2024-06-03 20:40:40,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1346, PETRI_PLACES=112, PETRI_TRANSITIONS=127} [2024-06-03 20:40:40,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-03 20:40:40,860 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 127 transitions, 1346 flow [2024-06-03 20:40:40,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:40,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:40,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:40,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:40:40,861 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:40,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2046884456, now seen corresponding path program 1 times [2024-06-03 20:40:40,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:40,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323244630] [2024-06-03 20:40:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:40,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:41,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323244630] [2024-06-03 20:40:41,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323244630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:41,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:41,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:41,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017957068] [2024-06-03 20:40:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:41,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:41,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:41,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:41,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 127 transitions, 1346 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:41,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:41,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:41,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:41,401 INFO L124 PetriNetUnfolderBase]: 1511/2542 cut-off events. [2024-06-03 20:40:41,401 INFO L125 PetriNetUnfolderBase]: For 30955/30975 co-relation queries the response was YES. [2024-06-03 20:40:41,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13126 conditions, 2542 events. 1511/2542 cut-off events. For 30955/30975 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14450 event pairs, 377 based on Foata normal form. 24/2559 useless extension candidates. Maximal degree in co-relation 13072. Up to 1842 conditions per place. [2024-06-03 20:40:41,420 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 129 selfloop transitions, 23 changer transitions 0/158 dead transitions. [2024-06-03 20:40:41,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 1758 flow [2024-06-03 20:40:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:40:41,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-03 20:40:41,422 INFO L175 Difference]: Start difference. First operand has 112 places, 127 transitions, 1346 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:40:41,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 1758 flow [2024-06-03 20:40:41,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 158 transitions, 1662 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:41,521 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 1288 flow [2024-06-03 20:40:41,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1288, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2024-06-03 20:40:41,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-03 20:40:41,522 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 1288 flow [2024-06-03 20:40:41,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:41,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:41,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:41,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:40:41,523 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:41,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash -122231822, now seen corresponding path program 1 times [2024-06-03 20:40:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000548648] [2024-06-03 20:40:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:41,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:41,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000548648] [2024-06-03 20:40:41,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000548648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:41,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:41,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:41,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147136292] [2024-06-03 20:40:41,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:41,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:41,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:41,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:41,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:41,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:41,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 127 transitions, 1288 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:41,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:41,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:41,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:42,262 INFO L124 PetriNetUnfolderBase]: 1505/2554 cut-off events. [2024-06-03 20:40:42,267 INFO L125 PetriNetUnfolderBase]: For 30035/30057 co-relation queries the response was YES. [2024-06-03 20:40:42,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13252 conditions, 2554 events. 1505/2554 cut-off events. For 30035/30057 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14772 event pairs, 400 based on Foata normal form. 2/2545 useless extension candidates. Maximal degree in co-relation 13195. Up to 2241 conditions per place. [2024-06-03 20:40:42,286 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 113 selfloop transitions, 35 changer transitions 0/163 dead transitions. [2024-06-03 20:40:42,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 163 transitions, 1855 flow [2024-06-03 20:40:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:40:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:40:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 20:40:42,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-03 20:40:42,288 INFO L175 Difference]: Start difference. First operand has 113 places, 127 transitions, 1288 flow. Second operand 8 states and 169 transitions. [2024-06-03 20:40:42,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 163 transitions, 1855 flow [2024-06-03 20:40:42,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 163 transitions, 1786 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:42,322 INFO L231 Difference]: Finished difference. Result has 121 places, 143 transitions, 1496 flow [2024-06-03 20:40:42,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1496, PETRI_PLACES=121, PETRI_TRANSITIONS=143} [2024-06-03 20:40:42,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-03 20:40:42,323 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 143 transitions, 1496 flow [2024-06-03 20:40:42,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:42,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:42,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:42,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:40:42,324 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:42,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -133863482, now seen corresponding path program 2 times [2024-06-03 20:40:42,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:42,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486664196] [2024-06-03 20:40:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:42,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:42,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:42,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486664196] [2024-06-03 20:40:42,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486664196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:42,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:42,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922466223] [2024-06-03 20:40:42,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:42,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:42,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:42,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:42,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:42,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 143 transitions, 1496 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) [2024-06-03 20:40:42,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:42,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:42,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:42,863 INFO L124 PetriNetUnfolderBase]: 1501/2539 cut-off events. [2024-06-03 20:40:42,863 INFO L125 PetriNetUnfolderBase]: For 31971/32018 co-relation queries the response was YES. [2024-06-03 20:40:42,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13376 conditions, 2539 events. 1501/2539 cut-off events. For 31971/32018 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14585 event pairs, 414 based on Foata normal form. 2/2522 useless extension candidates. Maximal degree in co-relation 13315. Up to 2238 conditions per place. [2024-06-03 20:40:42,884 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 106 selfloop transitions, 29 changer transitions 0/150 dead transitions. [2024-06-03 20:40:42,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 150 transitions, 1788 flow [2024-06-03 20:40:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:40:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:40:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-03 20:40:42,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-03 20:40:42,886 INFO L175 Difference]: Start difference. First operand has 121 places, 143 transitions, 1496 flow. Second operand 4 states and 97 transitions. [2024-06-03 20:40:42,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 150 transitions, 1788 flow [2024-06-03 20:40:42,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 150 transitions, 1752 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-03 20:40:42,923 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1534 flow [2024-06-03 20:40:42,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1534, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-03 20:40:42,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-03 20:40:42,923 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1534 flow [2024-06-03 20:40:42,924 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) [2024-06-03 20:40:42,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:42,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:42,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:40:42,924 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:42,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash -133447772, now seen corresponding path program 3 times [2024-06-03 20:40:42,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:42,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098359219] [2024-06-03 20:40:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:42,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:43,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098359219] [2024-06-03 20:40:43,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098359219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:43,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:43,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050867911] [2024-06-03 20:40:43,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:43,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:43,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:43,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:43,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:43,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:43,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1534 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) [2024-06-03 20:40:43,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:43,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:43,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:43,474 INFO L124 PetriNetUnfolderBase]: 1495/2531 cut-off events. [2024-06-03 20:40:43,475 INFO L125 PetriNetUnfolderBase]: For 34133/34174 co-relation queries the response was YES. [2024-06-03 20:40:43,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13482 conditions, 2531 events. 1495/2531 cut-off events. For 34133/34174 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14508 event pairs, 413 based on Foata normal form. 2/2514 useless extension candidates. Maximal degree in co-relation 13419. Up to 2228 conditions per place. [2024-06-03 20:40:43,499 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 107 selfloop transitions, 32 changer transitions 0/154 dead transitions. [2024-06-03 20:40:43,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 154 transitions, 1862 flow [2024-06-03 20:40:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-03 20:40:43,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:40:43,500 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1534 flow. Second operand 5 states and 115 transitions. [2024-06-03 20:40:43,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 154 transitions, 1862 flow [2024-06-03 20:40:43,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 154 transitions, 1791 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:43,544 INFO L231 Difference]: Finished difference. Result has 125 places, 146 transitions, 1565 flow [2024-06-03 20:40:43,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1565, PETRI_PLACES=125, PETRI_TRANSITIONS=146} [2024-06-03 20:40:43,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-03 20:40:43,545 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 146 transitions, 1565 flow [2024-06-03 20:40:43,545 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) [2024-06-03 20:40:43,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:43,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:43,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:40:43,545 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:43,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash 2123651450, now seen corresponding path program 1 times [2024-06-03 20:40:43,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:43,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158444556] [2024-06-03 20:40:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:43,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:43,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:43,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158444556] [2024-06-03 20:40:43,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158444556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:43,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:43,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:43,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727975815] [2024-06-03 20:40:43,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:43,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:43,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:43,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:43,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 146 transitions, 1565 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:43,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:43,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:43,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:44,150 INFO L124 PetriNetUnfolderBase]: 1491/2555 cut-off events. [2024-06-03 20:40:44,150 INFO L125 PetriNetUnfolderBase]: For 34584/34589 co-relation queries the response was YES. [2024-06-03 20:40:44,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13845 conditions, 2555 events. 1491/2555 cut-off events. For 34584/34589 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14770 event pairs, 418 based on Foata normal form. 7/2552 useless extension candidates. Maximal degree in co-relation 13782. Up to 2176 conditions per place. [2024-06-03 20:40:44,176 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 110 selfloop transitions, 46 changer transitions 0/166 dead transitions. [2024-06-03 20:40:44,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 166 transitions, 2015 flow [2024-06-03 20:40:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 20:40:44,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:40:44,178 INFO L175 Difference]: Start difference. First operand has 125 places, 146 transitions, 1565 flow. Second operand 6 states and 144 transitions. [2024-06-03 20:40:44,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 166 transitions, 2015 flow [2024-06-03 20:40:44,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 166 transitions, 1937 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:44,216 INFO L231 Difference]: Finished difference. Result has 128 places, 150 transitions, 1630 flow [2024-06-03 20:40:44,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1630, PETRI_PLACES=128, PETRI_TRANSITIONS=150} [2024-06-03 20:40:44,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-03 20:40:44,217 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 150 transitions, 1630 flow [2024-06-03 20:40:44,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:44,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:44,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:44,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:40:44,218 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)] === [2024-06-03 20:40:44,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:44,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2123771420, now seen corresponding path program 2 times [2024-06-03 20:40:44,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:44,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082825646] [2024-06-03 20:40:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:44,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:44,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:44,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082825646] [2024-06-03 20:40:44,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082825646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:44,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:44,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:44,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565769013] [2024-06-03 20:40:44,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:44,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:44,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:44,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:44,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:44,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:44,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 150 transitions, 1630 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:44,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:44,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:44,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:44,773 INFO L124 PetriNetUnfolderBase]: 1483/2544 cut-off events. [2024-06-03 20:40:44,774 INFO L125 PetriNetUnfolderBase]: For 36165/36170 co-relation queries the response was YES. [2024-06-03 20:40:44,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13911 conditions, 2544 events. 1483/2544 cut-off events. For 36165/36170 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14703 event pairs, 418 based on Foata normal form. 7/2541 useless extension candidates. Maximal degree in co-relation 13847. Up to 2168 conditions per place. [2024-06-03 20:40:44,794 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 110 selfloop transitions, 46 changer transitions 0/166 dead transitions. [2024-06-03 20:40:44,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 166 transitions, 1994 flow [2024-06-03 20:40:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:40:44,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-03 20:40:44,796 INFO L175 Difference]: Start difference. First operand has 128 places, 150 transitions, 1630 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:40:44,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 166 transitions, 1994 flow [2024-06-03 20:40:44,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 166 transitions, 1868 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:44,833 INFO L231 Difference]: Finished difference. Result has 131 places, 150 transitions, 1603 flow [2024-06-03 20:40:44,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1603, PETRI_PLACES=131, PETRI_TRANSITIONS=150} [2024-06-03 20:40:44,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-03 20:40:44,834 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 150 transitions, 1603 flow [2024-06-03 20:40:44,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:44,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:44,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:44,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:40:44,835 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:44,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash -777337550, now seen corresponding path program 1 times [2024-06-03 20:40:44,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:44,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229588424] [2024-06-03 20:40:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:45,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229588424] [2024-06-03 20:40:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229588424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:45,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:45,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:45,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447806386] [2024-06-03 20:40:45,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:45,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:45,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:45,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 150 transitions, 1603 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:45,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:45,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:45,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:45,451 INFO L124 PetriNetUnfolderBase]: 1570/2648 cut-off events. [2024-06-03 20:40:45,451 INFO L125 PetriNetUnfolderBase]: For 39352/39354 co-relation queries the response was YES. [2024-06-03 20:40:45,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14316 conditions, 2648 events. 1570/2648 cut-off events. For 39352/39354 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15225 event pairs, 780 based on Foata normal form. 1/2648 useless extension candidates. Maximal degree in co-relation 14251. Up to 2379 conditions per place. [2024-06-03 20:40:45,472 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 160 selfloop transitions, 27 changer transitions 0/193 dead transitions. [2024-06-03 20:40:45,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 193 transitions, 2406 flow [2024-06-03 20:40:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 20:40:45,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 20:40:45,473 INFO L175 Difference]: Start difference. First operand has 131 places, 150 transitions, 1603 flow. Second operand 7 states and 156 transitions. [2024-06-03 20:40:45,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 193 transitions, 2406 flow [2024-06-03 20:40:45,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 193 transitions, 2253 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:45,516 INFO L231 Difference]: Finished difference. Result has 135 places, 169 transitions, 1784 flow [2024-06-03 20:40:45,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1784, PETRI_PLACES=135, PETRI_TRANSITIONS=169} [2024-06-03 20:40:45,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-03 20:40:45,517 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 169 transitions, 1784 flow [2024-06-03 20:40:45,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:45,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:45,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:45,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:40:45,518 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:45,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash -133441820, now seen corresponding path program 2 times [2024-06-03 20:40:45,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:45,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093234776] [2024-06-03 20:40:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:45,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:45,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093234776] [2024-06-03 20:40:45,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093234776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:45,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:45,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:45,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594053444] [2024-06-03 20:40:45,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:45,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:45,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:45,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:45,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:45,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:45,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 169 transitions, 1784 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:45,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:45,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:45,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:46,069 INFO L124 PetriNetUnfolderBase]: 1583/2670 cut-off events. [2024-06-03 20:40:46,069 INFO L125 PetriNetUnfolderBase]: For 42672/42674 co-relation queries the response was YES. [2024-06-03 20:40:46,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14830 conditions, 2670 events. 1583/2670 cut-off events. For 42672/42674 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15388 event pairs, 781 based on Foata normal form. 1/2670 useless extension candidates. Maximal degree in co-relation 14761. Up to 2412 conditions per place. [2024-06-03 20:40:46,091 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 25 changer transitions 0/195 dead transitions. [2024-06-03 20:40:46,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 195 transitions, 2381 flow [2024-06-03 20:40:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 20:40:46,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-03 20:40:46,093 INFO L175 Difference]: Start difference. First operand has 135 places, 169 transitions, 1784 flow. Second operand 7 states and 150 transitions. [2024-06-03 20:40:46,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 195 transitions, 2381 flow [2024-06-03 20:40:46,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 195 transitions, 2313 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:46,143 INFO L231 Difference]: Finished difference. Result has 142 places, 180 transitions, 1920 flow [2024-06-03 20:40:46,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1920, PETRI_PLACES=142, PETRI_TRANSITIONS=180} [2024-06-03 20:40:46,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-03 20:40:46,144 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 180 transitions, 1920 flow [2024-06-03 20:40:46,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:46,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:46,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:46,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:40:46,145 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)] === [2024-06-03 20:40:46,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash -119379290, now seen corresponding path program 3 times [2024-06-03 20:40:46,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:46,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86307239] [2024-06-03 20:40:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:46,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:46,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:46,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86307239] [2024-06-03 20:40:46,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86307239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:46,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:46,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219092407] [2024-06-03 20:40:46,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:46,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:46,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:46,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 180 transitions, 1920 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:46,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:46,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:46,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:46,724 INFO L124 PetriNetUnfolderBase]: 1580/2666 cut-off events. [2024-06-03 20:40:46,724 INFO L125 PetriNetUnfolderBase]: For 44914/44916 co-relation queries the response was YES. [2024-06-03 20:40:46,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14888 conditions, 2666 events. 1580/2666 cut-off events. For 44914/44916 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15336 event pairs, 781 based on Foata normal form. 1/2666 useless extension candidates. Maximal degree in co-relation 14816. Up to 2410 conditions per place. [2024-06-03 20:40:46,743 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 165 selfloop transitions, 26 changer transitions 0/197 dead transitions. [2024-06-03 20:40:46,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 197 transitions, 2417 flow [2024-06-03 20:40:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 20:40:46,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:40:46,745 INFO L175 Difference]: Start difference. First operand has 142 places, 180 transitions, 1920 flow. Second operand 6 states and 138 transitions. [2024-06-03 20:40:46,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 197 transitions, 2417 flow [2024-06-03 20:40:46,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 197 transitions, 2367 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:46,799 INFO L231 Difference]: Finished difference. Result has 146 places, 180 transitions, 1928 flow [2024-06-03 20:40:46,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1928, PETRI_PLACES=146, PETRI_TRANSITIONS=180} [2024-06-03 20:40:46,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-03 20:40:46,800 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 180 transitions, 1928 flow [2024-06-03 20:40:46,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:46,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:46,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:46,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:40:46,800 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)] === [2024-06-03 20:40:46,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash -133432892, now seen corresponding path program 1 times [2024-06-03 20:40:46,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:46,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122690282] [2024-06-03 20:40:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:46,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:47,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:47,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122690282] [2024-06-03 20:40:47,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122690282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:47,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:47,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940508787] [2024-06-03 20:40:47,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:47,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:47,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:47,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:40:47,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 180 transitions, 1928 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) [2024-06-03 20:40:47,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:47,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:40:47,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:47,335 INFO L124 PetriNetUnfolderBase]: 1508/2551 cut-off events. [2024-06-03 20:40:47,336 INFO L125 PetriNetUnfolderBase]: For 47540/47593 co-relation queries the response was YES. [2024-06-03 20:40:47,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14476 conditions, 2551 events. 1508/2551 cut-off events. For 47540/47593 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14808 event pairs, 751 based on Foata normal form. 29/2566 useless extension candidates. Maximal degree in co-relation 14402. Up to 2290 conditions per place. [2024-06-03 20:40:47,357 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 165 selfloop transitions, 11 changer transitions 0/192 dead transitions. [2024-06-03 20:40:47,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 192 transitions, 2335 flow [2024-06-03 20:40:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-03 20:40:47,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-03 20:40:47,359 INFO L175 Difference]: Start difference. First operand has 146 places, 180 transitions, 1928 flow. Second operand 5 states and 113 transitions. [2024-06-03 20:40:47,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 192 transitions, 2335 flow [2024-06-03 20:40:47,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 192 transitions, 2292 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:47,481 INFO L231 Difference]: Finished difference. Result has 148 places, 182 transitions, 1932 flow [2024-06-03 20:40:47,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1932, PETRI_PLACES=148, PETRI_TRANSITIONS=182} [2024-06-03 20:40:47,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-03 20:40:47,484 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 182 transitions, 1932 flow [2024-06-03 20:40:47,484 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) [2024-06-03 20:40:47,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:47,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:47,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:40:47,485 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:47,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1408686598, now seen corresponding path program 1 times [2024-06-03 20:40:47,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:47,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926891200] [2024-06-03 20:40:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:47,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:47,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:47,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926891200] [2024-06-03 20:40:47,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926891200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:47,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:47,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:47,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213060165] [2024-06-03 20:40:47,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:47,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:47,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:47,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:47,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:47,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:47,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 182 transitions, 1932 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:47,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:47,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:47,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:48,107 INFO L124 PetriNetUnfolderBase]: 1580/2654 cut-off events. [2024-06-03 20:40:48,107 INFO L125 PetriNetUnfolderBase]: For 49370/49372 co-relation queries the response was YES. [2024-06-03 20:40:48,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15140 conditions, 2654 events. 1580/2654 cut-off events. For 49370/49372 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15183 event pairs, 779 based on Foata normal form. 1/2654 useless extension candidates. Maximal degree in co-relation 15065. Up to 2389 conditions per place. [2024-06-03 20:40:48,128 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 161 selfloop transitions, 39 changer transitions 0/206 dead transitions. [2024-06-03 20:40:48,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 206 transitions, 2503 flow [2024-06-03 20:40:48,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 20:40:48,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-03 20:40:48,129 INFO L175 Difference]: Start difference. First operand has 148 places, 182 transitions, 1932 flow. Second operand 7 states and 155 transitions. [2024-06-03 20:40:48,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 206 transitions, 2503 flow [2024-06-03 20:40:48,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 206 transitions, 2472 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:48,190 INFO L231 Difference]: Finished difference. Result has 153 places, 187 transitions, 2035 flow [2024-06-03 20:40:48,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2035, PETRI_PLACES=153, PETRI_TRANSITIONS=187} [2024-06-03 20:40:48,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-03 20:40:48,192 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 187 transitions, 2035 flow [2024-06-03 20:40:48,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:48,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:48,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:48,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:40:48,193 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:48,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash -961344610, now seen corresponding path program 2 times [2024-06-03 20:40:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:48,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594379361] [2024-06-03 20:40:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:48,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:48,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:48,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594379361] [2024-06-03 20:40:48,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594379361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:48,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:48,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:48,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326283686] [2024-06-03 20:40:48,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:48,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:48,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:48,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 187 transitions, 2035 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:40:48,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:48,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:48,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:48,809 INFO L124 PetriNetUnfolderBase]: 1585/2663 cut-off events. [2024-06-03 20:40:48,809 INFO L125 PetriNetUnfolderBase]: For 52276/52278 co-relation queries the response was YES. [2024-06-03 20:40:48,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15364 conditions, 2663 events. 1585/2663 cut-off events. For 52276/52278 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15261 event pairs, 779 based on Foata normal form. 1/2663 useless extension candidates. Maximal degree in co-relation 15287. Up to 2395 conditions per place. [2024-06-03 20:40:48,831 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 44 changer transitions 0/214 dead transitions. [2024-06-03 20:40:48,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 214 transitions, 2690 flow [2024-06-03 20:40:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:40:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:40:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 20:40:48,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-03 20:40:48,832 INFO L175 Difference]: Start difference. First operand has 153 places, 187 transitions, 2035 flow. Second operand 10 states and 207 transitions. [2024-06-03 20:40:48,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 214 transitions, 2690 flow [2024-06-03 20:40:48,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 214 transitions, 2590 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:48,903 INFO L231 Difference]: Finished difference. Result has 160 places, 192 transitions, 2087 flow [2024-06-03 20:40:48,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2087, PETRI_PLACES=160, PETRI_TRANSITIONS=192} [2024-06-03 20:40:48,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-03 20:40:48,904 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 192 transitions, 2087 flow [2024-06-03 20:40:48,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:40:48,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:48,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:48,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:40:48,905 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:48,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash -961350190, now seen corresponding path program 3 times [2024-06-03 20:40:48,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:48,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211721555] [2024-06-03 20:40:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:49,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:49,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211721555] [2024-06-03 20:40:49,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211721555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:49,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:49,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134723509] [2024-06-03 20:40:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:49,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:49,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:49,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:49,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:49,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:49,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 192 transitions, 2087 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:40:49,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:49,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:49,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:49,516 INFO L124 PetriNetUnfolderBase]: 1582/2659 cut-off events. [2024-06-03 20:40:49,516 INFO L125 PetriNetUnfolderBase]: For 54683/54685 co-relation queries the response was YES. [2024-06-03 20:40:49,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15418 conditions, 2659 events. 1582/2659 cut-off events. For 54683/54685 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15248 event pairs, 779 based on Foata normal form. 1/2659 useless extension candidates. Maximal degree in co-relation 15339. Up to 2392 conditions per place. [2024-06-03 20:40:49,537 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 43 changer transitions 0/211 dead transitions. [2024-06-03 20:40:49,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 211 transitions, 2624 flow [2024-06-03 20:40:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:40:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:40:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 20:40:49,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 20:40:49,549 INFO L175 Difference]: Start difference. First operand has 160 places, 192 transitions, 2087 flow. Second operand 8 states and 174 transitions. [2024-06-03 20:40:49,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 211 transitions, 2624 flow [2024-06-03 20:40:49,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 211 transitions, 2467 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-03 20:40:49,622 INFO L231 Difference]: Finished difference. Result has 159 places, 192 transitions, 2022 flow [2024-06-03 20:40:49,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2022, PETRI_PLACES=159, PETRI_TRANSITIONS=192} [2024-06-03 20:40:49,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-03 20:40:49,622 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 192 transitions, 2022 flow [2024-06-03 20:40:49,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:40:49,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:49,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:49,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:40:49,623 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:49,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash -385863742, now seen corresponding path program 4 times [2024-06-03 20:40:49,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:49,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884841423] [2024-06-03 20:40:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:49,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:49,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:49,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884841423] [2024-06-03 20:40:49,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884841423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:49,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:49,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:49,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531156199] [2024-06-03 20:40:49,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:49,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:49,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:49,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:49,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 192 transitions, 2022 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:49,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:49,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:49,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:50,211 INFO L124 PetriNetUnfolderBase]: 1587/2668 cut-off events. [2024-06-03 20:40:50,211 INFO L125 PetriNetUnfolderBase]: For 57466/57468 co-relation queries the response was YES. [2024-06-03 20:40:50,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15448 conditions, 2668 events. 1587/2668 cut-off events. For 57466/57468 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15292 event pairs, 778 based on Foata normal form. 1/2668 useless extension candidates. Maximal degree in co-relation 15370. Up to 2419 conditions per place. [2024-06-03 20:40:50,231 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 175 selfloop transitions, 29 changer transitions 0/210 dead transitions. [2024-06-03 20:40:50,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 210 transitions, 2573 flow [2024-06-03 20:40:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 20:40:50,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-03 20:40:50,238 INFO L175 Difference]: Start difference. First operand has 159 places, 192 transitions, 2022 flow. Second operand 7 states and 150 transitions. [2024-06-03 20:40:50,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 210 transitions, 2573 flow [2024-06-03 20:40:50,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 210 transitions, 2481 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:40:50,305 INFO L231 Difference]: Finished difference. Result has 159 places, 195 transitions, 2023 flow [2024-06-03 20:40:50,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2023, PETRI_PLACES=159, PETRI_TRANSITIONS=195} [2024-06-03 20:40:50,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-03 20:40:50,306 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 195 transitions, 2023 flow [2024-06-03 20:40:50,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:50,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:50,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:50,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:40:50,306 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:50,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 150914548, now seen corresponding path program 5 times [2024-06-03 20:40:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:50,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635554743] [2024-06-03 20:40:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:50,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:50,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:50,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635554743] [2024-06-03 20:40:50,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635554743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:50,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:50,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:50,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003434891] [2024-06-03 20:40:50,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:50,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:50,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:50,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:50,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:50,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:50,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 195 transitions, 2023 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:50,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:50,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:50,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:50,929 INFO L124 PetriNetUnfolderBase]: 1584/2664 cut-off events. [2024-06-03 20:40:50,930 INFO L125 PetriNetUnfolderBase]: For 60005/60007 co-relation queries the response was YES. [2024-06-03 20:40:50,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15469 conditions, 2664 events. 1584/2664 cut-off events. For 60005/60007 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15263 event pairs, 779 based on Foata normal form. 1/2664 useless extension candidates. Maximal degree in co-relation 15390. Up to 2416 conditions per place. [2024-06-03 20:40:50,951 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 29 changer transitions 0/211 dead transitions. [2024-06-03 20:40:50,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 211 transitions, 2496 flow [2024-06-03 20:40:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 20:40:50,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 20:40:50,952 INFO L175 Difference]: Start difference. First operand has 159 places, 195 transitions, 2023 flow. Second operand 6 states and 137 transitions. [2024-06-03 20:40:50,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 211 transitions, 2496 flow [2024-06-03 20:40:51,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 211 transitions, 2447 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:51,034 INFO L231 Difference]: Finished difference. Result has 161 places, 195 transitions, 2038 flow [2024-06-03 20:40:51,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2038, PETRI_PLACES=161, PETRI_TRANSITIONS=195} [2024-06-03 20:40:51,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-03 20:40:51,036 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 195 transitions, 2038 flow [2024-06-03 20:40:51,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:51,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:51,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:51,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:40:51,036 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:51,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:51,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1445517929, now seen corresponding path program 1 times [2024-06-03 20:40:51,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:51,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116568906] [2024-06-03 20:40:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:51,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:51,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:51,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116568906] [2024-06-03 20:40:51,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116568906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:51,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:51,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:40:51,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503156780] [2024-06-03 20:40:51,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:51,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:40:51,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:40:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:40:51,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:40:51,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 195 transitions, 2038 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:51,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:51,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:40:51,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:51,955 INFO L124 PetriNetUnfolderBase]: 1700/2851 cut-off events. [2024-06-03 20:40:51,956 INFO L125 PetriNetUnfolderBase]: For 64209/64211 co-relation queries the response was YES. [2024-06-03 20:40:51,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16815 conditions, 2851 events. 1700/2851 cut-off events. For 64209/64211 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16341 event pairs, 407 based on Foata normal form. 1/2851 useless extension candidates. Maximal degree in co-relation 16735. Up to 2420 conditions per place. [2024-06-03 20:40:51,977 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 70 changer transitions 0/270 dead transitions. [2024-06-03 20:40:51,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 270 transitions, 3354 flow [2024-06-03 20:40:51,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 20:40:51,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-03 20:40:51,979 INFO L175 Difference]: Start difference. First operand has 161 places, 195 transitions, 2038 flow. Second operand 9 states and 188 transitions. [2024-06-03 20:40:51,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 270 transitions, 3354 flow [2024-06-03 20:40:52,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 270 transitions, 3275 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:52,064 INFO L231 Difference]: Finished difference. Result has 167 places, 235 transitions, 2724 flow [2024-06-03 20:40:52,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2724, PETRI_PLACES=167, PETRI_TRANSITIONS=235} [2024-06-03 20:40:52,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-03 20:40:52,065 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 235 transitions, 2724 flow [2024-06-03 20:40:52,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:52,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:52,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:52,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:40:52,065 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:52,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1535830559, now seen corresponding path program 1 times [2024-06-03 20:40:52,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:52,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33974208] [2024-06-03 20:40:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:52,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:52,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:52,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33974208] [2024-06-03 20:40:52,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33974208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:52,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:52,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:40:52,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233522568] [2024-06-03 20:40:52,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:52,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:40:52,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:52,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:40:52,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:40:52,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:40:52,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 235 transitions, 2724 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:52,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:52,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:40:52,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:52,842 INFO L124 PetriNetUnfolderBase]: 1836/3072 cut-off events. [2024-06-03 20:40:52,842 INFO L125 PetriNetUnfolderBase]: For 74597/74599 co-relation queries the response was YES. [2024-06-03 20:40:52,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19398 conditions, 3072 events. 1836/3072 cut-off events. For 74597/74599 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17833 event pairs, 396 based on Foata normal form. 4/3073 useless extension candidates. Maximal degree in co-relation 19313. Up to 2562 conditions per place. [2024-06-03 20:40:52,867 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 191 selfloop transitions, 106 changer transitions 0/303 dead transitions. [2024-06-03 20:40:52,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 303 transitions, 4101 flow [2024-06-03 20:40:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:40:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:40:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-03 20:40:52,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077605321507761 [2024-06-03 20:40:52,869 INFO L175 Difference]: Start difference. First operand has 167 places, 235 transitions, 2724 flow. Second operand 11 states and 229 transitions. [2024-06-03 20:40:52,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 303 transitions, 4101 flow [2024-06-03 20:40:52,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 303 transitions, 3981 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:52,984 INFO L231 Difference]: Finished difference. Result has 178 places, 269 transitions, 3444 flow [2024-06-03 20:40:52,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3444, PETRI_PLACES=178, PETRI_TRANSITIONS=269} [2024-06-03 20:40:52,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-03 20:40:52,985 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 269 transitions, 3444 flow [2024-06-03 20:40:52,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:52,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:52,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:52,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:40:52,986 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:52,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1043616165, now seen corresponding path program 2 times [2024-06-03 20:40:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:52,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814936465] [2024-06-03 20:40:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:52,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814936465] [2024-06-03 20:40:53,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814936465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:53,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:53,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:40:53,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036153484] [2024-06-03 20:40:53,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:53,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:40:53,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:40:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:40:53,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:40:53,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 269 transitions, 3444 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:53,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:53,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:40:53,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:53,733 INFO L124 PetriNetUnfolderBase]: 1838/3075 cut-off events. [2024-06-03 20:40:53,734 INFO L125 PetriNetUnfolderBase]: For 81599/81601 co-relation queries the response was YES. [2024-06-03 20:40:53,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20513 conditions, 3075 events. 1838/3075 cut-off events. For 81599/81601 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17843 event pairs, 421 based on Foata normal form. 2/3072 useless extension candidates. Maximal degree in co-relation 20424. Up to 2408 conditions per place. [2024-06-03 20:40:53,760 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 155 selfloop transitions, 135 changer transitions 0/296 dead transitions. [2024-06-03 20:40:53,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 296 transitions, 4392 flow [2024-06-03 20:40:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:40:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:40:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 20:40:53,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-03 20:40:53,762 INFO L175 Difference]: Start difference. First operand has 178 places, 269 transitions, 3444 flow. Second operand 8 states and 166 transitions. [2024-06-03 20:40:53,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 296 transitions, 4392 flow [2024-06-03 20:40:53,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 296 transitions, 4258 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:53,885 INFO L231 Difference]: Finished difference. Result has 181 places, 278 transitions, 3858 flow [2024-06-03 20:40:53,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3858, PETRI_PLACES=181, PETRI_TRANSITIONS=278} [2024-06-03 20:40:53,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-03 20:40:53,886 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 278 transitions, 3858 flow [2024-06-03 20:40:53,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:53,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:53,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:53,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:40:53,887 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:53,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:53,887 INFO L85 PathProgramCache]: Analyzing trace with hash -863644699, now seen corresponding path program 2 times [2024-06-03 20:40:53,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:53,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221886508] [2024-06-03 20:40:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:53,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:54,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:54,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221886508] [2024-06-03 20:40:54,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221886508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:54,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:54,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628774416] [2024-06-03 20:40:54,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:54,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:54,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:54,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:54,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:40:54,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 278 transitions, 3858 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:54,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:54,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:40:54,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:54,742 INFO L124 PetriNetUnfolderBase]: 1864/3123 cut-off events. [2024-06-03 20:40:54,743 INFO L125 PetriNetUnfolderBase]: For 86685/86687 co-relation queries the response was YES. [2024-06-03 20:40:54,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21711 conditions, 3123 events. 1864/3123 cut-off events. For 86685/86687 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18280 event pairs, 385 based on Foata normal form. 4/3126 useless extension candidates. Maximal degree in co-relation 21620. Up to 2688 conditions per place. [2024-06-03 20:40:54,773 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 242 selfloop transitions, 75 changer transitions 0/323 dead transitions. [2024-06-03 20:40:54,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 323 transitions, 4943 flow [2024-06-03 20:40:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:40:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:40:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-03 20:40:54,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144124168514412 [2024-06-03 20:40:54,775 INFO L175 Difference]: Start difference. First operand has 181 places, 278 transitions, 3858 flow. Second operand 11 states and 232 transitions. [2024-06-03 20:40:54,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 323 transitions, 4943 flow [2024-06-03 20:40:55,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 323 transitions, 4804 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:55,039 INFO L231 Difference]: Finished difference. Result has 191 places, 288 transitions, 4079 flow [2024-06-03 20:40:55,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3720, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4079, PETRI_PLACES=191, PETRI_TRANSITIONS=288} [2024-06-03 20:40:55,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-03 20:40:55,040 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 288 transitions, 4079 flow [2024-06-03 20:40:55,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:55,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:55,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:55,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:40:55,041 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:55,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash 994138077, now seen corresponding path program 3 times [2024-06-03 20:40:55,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:55,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915223413] [2024-06-03 20:40:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:55,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:55,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915223413] [2024-06-03 20:40:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915223413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:55,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621396286] [2024-06-03 20:40:55,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:55,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:55,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:55,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:40:55,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 288 transitions, 4079 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:55,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:55,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:40:55,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:55,923 INFO L124 PetriNetUnfolderBase]: 1858/3115 cut-off events. [2024-06-03 20:40:55,923 INFO L125 PetriNetUnfolderBase]: For 88438/88440 co-relation queries the response was YES. [2024-06-03 20:40:55,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21946 conditions, 3115 events. 1858/3115 cut-off events. For 88438/88440 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18220 event pairs, 395 based on Foata normal form. 4/3118 useless extension candidates. Maximal degree in co-relation 21851. Up to 2684 conditions per place. [2024-06-03 20:40:55,956 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 241 selfloop transitions, 72 changer transitions 0/319 dead transitions. [2024-06-03 20:40:55,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 319 transitions, 4935 flow [2024-06-03 20:40:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:40:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:40:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-03 20:40:55,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-03 20:40:55,958 INFO L175 Difference]: Start difference. First operand has 191 places, 288 transitions, 4079 flow. Second operand 11 states and 227 transitions. [2024-06-03 20:40:55,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 319 transitions, 4935 flow [2024-06-03 20:40:56,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 319 transitions, 4774 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-03 20:40:56,149 INFO L231 Difference]: Finished difference. Result has 195 places, 289 transitions, 4115 flow [2024-06-03 20:40:56,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4115, PETRI_PLACES=195, PETRI_TRANSITIONS=289} [2024-06-03 20:40:56,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-03 20:40:56,150 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 289 transitions, 4115 flow [2024-06-03 20:40:56,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:56,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:56,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:56,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:40:56,151 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:56,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash 461629701, now seen corresponding path program 1 times [2024-06-03 20:40:56,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:56,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149250286] [2024-06-03 20:40:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:56,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:56,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149250286] [2024-06-03 20:40:56,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149250286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:56,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:56,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:40:56,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328911237] [2024-06-03 20:40:56,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:56,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:40:56,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:56,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:40:56,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:40:56,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:56,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 289 transitions, 4115 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:56,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:56,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:56,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:56,985 INFO L124 PetriNetUnfolderBase]: 1820/3080 cut-off events. [2024-06-03 20:40:56,985 INFO L125 PetriNetUnfolderBase]: For 94032/94054 co-relation queries the response was YES. [2024-06-03 20:40:57,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21741 conditions, 3080 events. 1820/3080 cut-off events. For 94032/94054 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18312 event pairs, 396 based on Foata normal form. 12/3081 useless extension candidates. Maximal degree in co-relation 21645. Up to 2596 conditions per place. [2024-06-03 20:40:57,014 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 38 changer transitions 0/314 dead transitions. [2024-06-03 20:40:57,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 314 transitions, 4800 flow [2024-06-03 20:40:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 20:40:57,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-03 20:40:57,016 INFO L175 Difference]: Start difference. First operand has 195 places, 289 transitions, 4115 flow. Second operand 9 states and 188 transitions. [2024-06-03 20:40:57,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 314 transitions, 4800 flow [2024-06-03 20:40:57,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 314 transitions, 4667 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 20:40:57,182 INFO L231 Difference]: Finished difference. Result has 196 places, 290 transitions, 4082 flow [2024-06-03 20:40:57,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4082, PETRI_PLACES=196, PETRI_TRANSITIONS=290} [2024-06-03 20:40:57,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-03 20:40:57,183 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 290 transitions, 4082 flow [2024-06-03 20:40:57,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:57,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:57,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:57,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:40:57,184 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:57,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -942413123, now seen corresponding path program 4 times [2024-06-03 20:40:57,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:57,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841637538] [2024-06-03 20:40:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:57,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841637538] [2024-06-03 20:40:57,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841637538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:57,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:57,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:57,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149133272] [2024-06-03 20:40:57,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:57,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:57,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:57,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:57,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:57,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:57,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 290 transitions, 4082 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:40:57,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:57,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:57,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:57,974 INFO L124 PetriNetUnfolderBase]: 1959/3268 cut-off events. [2024-06-03 20:40:57,975 INFO L125 PetriNetUnfolderBase]: For 93827/93829 co-relation queries the response was YES. [2024-06-03 20:40:57,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23075 conditions, 3268 events. 1959/3268 cut-off events. For 93827/93829 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 19169 event pairs, 424 based on Foata normal form. 2/3265 useless extension candidates. Maximal degree in co-relation 22979. Up to 2571 conditions per place. [2024-06-03 20:40:58,005 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 164 changer transitions 0/334 dead transitions. [2024-06-03 20:40:58,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 334 transitions, 5278 flow [2024-06-03 20:40:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 20:40:58,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-03 20:40:58,007 INFO L175 Difference]: Start difference. First operand has 196 places, 290 transitions, 4082 flow. Second operand 9 states and 202 transitions. [2024-06-03 20:40:58,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 334 transitions, 5278 flow [2024-06-03 20:40:58,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 334 transitions, 5196 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:40:58,201 INFO L231 Difference]: Finished difference. Result has 200 places, 314 transitions, 4803 flow [2024-06-03 20:40:58,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4803, PETRI_PLACES=200, PETRI_TRANSITIONS=314} [2024-06-03 20:40:58,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-03 20:40:58,201 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 314 transitions, 4803 flow [2024-06-03 20:40:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:40:58,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:58,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:58,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:40:58,202 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:58,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2119165403, now seen corresponding path program 5 times [2024-06-03 20:40:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835564808] [2024-06-03 20:40:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835564808] [2024-06-03 20:40:58,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835564808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:58,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:58,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:58,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881328667] [2024-06-03 20:40:58,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:58,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:58,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:58,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:58,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:58,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 314 transitions, 4803 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:58,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:58,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:58,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:59,018 INFO L124 PetriNetUnfolderBase]: 2006/3345 cut-off events. [2024-06-03 20:40:59,019 INFO L125 PetriNetUnfolderBase]: For 105260/105262 co-relation queries the response was YES. [2024-06-03 20:40:59,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24996 conditions, 3345 events. 2006/3345 cut-off events. For 105260/105262 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19713 event pairs, 426 based on Foata normal form. 3/3343 useless extension candidates. Maximal degree in co-relation 24898. Up to 2763 conditions per place. [2024-06-03 20:40:59,052 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 228 selfloop transitions, 115 changer transitions 0/349 dead transitions. [2024-06-03 20:40:59,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 349 transitions, 6008 flow [2024-06-03 20:40:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:40:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:40:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 20:40:59,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-03 20:40:59,053 INFO L175 Difference]: Start difference. First operand has 200 places, 314 transitions, 4803 flow. Second operand 8 states and 173 transitions. [2024-06-03 20:40:59,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 349 transitions, 6008 flow [2024-06-03 20:40:59,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 349 transitions, 5727 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:59,253 INFO L231 Difference]: Finished difference. Result has 207 places, 333 transitions, 5255 flow [2024-06-03 20:40:59,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4592, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5255, PETRI_PLACES=207, PETRI_TRANSITIONS=333} [2024-06-03 20:40:59,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-03 20:40:59,254 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 333 transitions, 5255 flow [2024-06-03 20:40:59,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:59,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:59,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:59,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:40:59,254 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:59,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:59,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2118928253, now seen corresponding path program 6 times [2024-06-03 20:40:59,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:59,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149531221] [2024-06-03 20:40:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:59,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:59,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:59,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149531221] [2024-06-03 20:40:59,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149531221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:59,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:59,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529886127] [2024-06-03 20:40:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:59,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:59,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:59,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 333 transitions, 5255 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:59,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:59,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:59,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:00,100 INFO L124 PetriNetUnfolderBase]: 2000/3337 cut-off events. [2024-06-03 20:41:00,100 INFO L125 PetriNetUnfolderBase]: For 109754/109756 co-relation queries the response was YES. [2024-06-03 20:41:00,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25627 conditions, 3337 events. 2000/3337 cut-off events. For 109754/109756 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19670 event pairs, 426 based on Foata normal form. 2/3334 useless extension candidates. Maximal degree in co-relation 25524. Up to 2759 conditions per place. [2024-06-03 20:41:00,201 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 225 selfloop transitions, 121 changer transitions 0/352 dead transitions. [2024-06-03 20:41:00,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 352 transitions, 6116 flow [2024-06-03 20:41:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 20:41:00,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 20:41:00,203 INFO L175 Difference]: Start difference. First operand has 207 places, 333 transitions, 5255 flow. Second operand 8 states and 177 transitions. [2024-06-03 20:41:00,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 352 transitions, 6116 flow [2024-06-03 20:41:00,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 352 transitions, 5949 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:00,442 INFO L231 Difference]: Finished difference. Result has 211 places, 334 transitions, 5376 flow [2024-06-03 20:41:00,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5376, PETRI_PLACES=211, PETRI_TRANSITIONS=334} [2024-06-03 20:41:00,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-03 20:41:00,443 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 334 transitions, 5376 flow [2024-06-03 20:41:00,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:00,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:00,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:00,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:41:00,444 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:00,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1793720645, now seen corresponding path program 2 times [2024-06-03 20:41:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:00,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079174051] [2024-06-03 20:41:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:00,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:00,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079174051] [2024-06-03 20:41:00,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079174051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:00,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:00,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:00,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651734455] [2024-06-03 20:41:00,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:00,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:00,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:00,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:00,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:41:00,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 334 transitions, 5376 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) [2024-06-03 20:41:00,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:00,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:41:00,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:01,257 INFO L124 PetriNetUnfolderBase]: 1959/3292 cut-off events. [2024-06-03 20:41:01,258 INFO L125 PetriNetUnfolderBase]: For 113383/113442 co-relation queries the response was YES. [2024-06-03 20:41:01,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25214 conditions, 3292 events. 1959/3292 cut-off events. For 113383/113442 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19674 event pairs, 416 based on Foata normal form. 10/3281 useless extension candidates. Maximal degree in co-relation 25110. Up to 2723 conditions per place. [2024-06-03 20:41:01,293 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 270 selfloop transitions, 39 changer transitions 0/347 dead transitions. [2024-06-03 20:41:01,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 347 transitions, 6074 flow [2024-06-03 20:41:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:41:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:41:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 20:41:01,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-03 20:41:01,294 INFO L175 Difference]: Start difference. First operand has 211 places, 334 transitions, 5376 flow. Second operand 5 states and 118 transitions. [2024-06-03 20:41:01,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 347 transitions, 6074 flow [2024-06-03 20:41:01,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 347 transitions, 5908 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:01,521 INFO L231 Difference]: Finished difference. Result has 211 places, 335 transitions, 5321 flow [2024-06-03 20:41:01,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5210, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5321, PETRI_PLACES=211, PETRI_TRANSITIONS=335} [2024-06-03 20:41:01,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-03 20:41:01,521 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 335 transitions, 5321 flow [2024-06-03 20:41:01,522 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) [2024-06-03 20:41:01,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:01,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:01,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:41:01,522 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:01,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:01,522 INFO L85 PathProgramCache]: Analyzing trace with hash -91896493, now seen corresponding path program 3 times [2024-06-03 20:41:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687054092] [2024-06-03 20:41:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:01,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:01,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687054092] [2024-06-03 20:41:01,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687054092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:01,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:01,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:01,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588815681] [2024-06-03 20:41:01,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:01,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:01,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:01,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:01,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 335 transitions, 5321 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:41:01,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:01,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:01,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:02,310 INFO L124 PetriNetUnfolderBase]: 2033/3393 cut-off events. [2024-06-03 20:41:02,310 INFO L125 PetriNetUnfolderBase]: For 106744/106746 co-relation queries the response was YES. [2024-06-03 20:41:02,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25582 conditions, 3393 events. 2033/3393 cut-off events. For 106744/106746 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20096 event pairs, 435 based on Foata normal form. 1/3389 useless extension candidates. Maximal degree in co-relation 25479. Up to 2693 conditions per place. [2024-06-03 20:41:02,343 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 134 changer transitions 0/359 dead transitions. [2024-06-03 20:41:02,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 359 transitions, 6181 flow [2024-06-03 20:41:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 20:41:02,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-03 20:41:02,344 INFO L175 Difference]: Start difference. First operand has 211 places, 335 transitions, 5321 flow. Second operand 8 states and 183 transitions. [2024-06-03 20:41:02,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 359 transitions, 6181 flow [2024-06-03 20:41:02,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 359 transitions, 6084 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 20:41:02,554 INFO L231 Difference]: Finished difference. Result has 216 places, 335 transitions, 5500 flow [2024-06-03 20:41:02,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5500, PETRI_PLACES=216, PETRI_TRANSITIONS=335} [2024-06-03 20:41:02,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-03 20:41:02,555 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 335 transitions, 5500 flow [2024-06-03 20:41:02,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:41:02,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:02,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:02,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:41:02,555 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:02,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash 835068725, now seen corresponding path program 7 times [2024-06-03 20:41:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172922187] [2024-06-03 20:41:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:02,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:02,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:02,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172922187] [2024-06-03 20:41:02,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172922187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:02,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:02,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:02,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206160080] [2024-06-03 20:41:02,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:02,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:02,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:02,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:02,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:02,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 335 transitions, 5500 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:41:02,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:02,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:02,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:03,341 INFO L124 PetriNetUnfolderBase]: 2054/3416 cut-off events. [2024-06-03 20:41:03,341 INFO L125 PetriNetUnfolderBase]: For 109346/109348 co-relation queries the response was YES. [2024-06-03 20:41:03,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26167 conditions, 3416 events. 2054/3416 cut-off events. For 109346/109348 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20151 event pairs, 437 based on Foata normal form. 1/3412 useless extension candidates. Maximal degree in co-relation 26063. Up to 2635 conditions per place. [2024-06-03 20:41:03,379 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 182 changer transitions 0/367 dead transitions. [2024-06-03 20:41:03,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 367 transitions, 6675 flow [2024-06-03 20:41:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 20:41:03,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-03 20:41:03,382 INFO L175 Difference]: Start difference. First operand has 216 places, 335 transitions, 5500 flow. Second operand 8 states and 183 transitions. [2024-06-03 20:41:03,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 367 transitions, 6675 flow [2024-06-03 20:41:03,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 367 transitions, 6345 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 20:41:03,625 INFO L231 Difference]: Finished difference. Result has 218 places, 348 transitions, 5895 flow [2024-06-03 20:41:03,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5170, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5895, PETRI_PLACES=218, PETRI_TRANSITIONS=348} [2024-06-03 20:41:03,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-03 20:41:03,626 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 348 transitions, 5895 flow [2024-06-03 20:41:03,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:41:03,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:03,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:03,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:41:03,626 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:03,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash 916447063, now seen corresponding path program 8 times [2024-06-03 20:41:03,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:03,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564868747] [2024-06-03 20:41:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:03,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:03,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:03,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564868747] [2024-06-03 20:41:03,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564868747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:03,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:03,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:03,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568936237] [2024-06-03 20:41:03,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:03,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:03,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:03,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:03,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 348 transitions, 5895 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:03,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:03,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:03,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:04,409 INFO L124 PetriNetUnfolderBase]: 2051/3413 cut-off events. [2024-06-03 20:41:04,409 INFO L125 PetriNetUnfolderBase]: For 116350/116352 co-relation queries the response was YES. [2024-06-03 20:41:04,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26879 conditions, 3413 events. 2051/3413 cut-off events. For 116350/116352 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20132 event pairs, 431 based on Foata normal form. 1/3409 useless extension candidates. Maximal degree in co-relation 26776. Up to 2907 conditions per place. [2024-06-03 20:41:04,444 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 73 changer transitions 0/367 dead transitions. [2024-06-03 20:41:04,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 367 transitions, 6681 flow [2024-06-03 20:41:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:41:04,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:41:04,445 INFO L175 Difference]: Start difference. First operand has 218 places, 348 transitions, 5895 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:41:04,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 367 transitions, 6681 flow [2024-06-03 20:41:04,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 367 transitions, 6533 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-03 20:41:04,704 INFO L231 Difference]: Finished difference. Result has 223 places, 348 transitions, 5899 flow [2024-06-03 20:41:04,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5747, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5899, PETRI_PLACES=223, PETRI_TRANSITIONS=348} [2024-06-03 20:41:04,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-03 20:41:04,705 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 348 transitions, 5899 flow [2024-06-03 20:41:04,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:04,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:04,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:04,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:41:04,706 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:04,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:04,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1240640261, now seen corresponding path program 9 times [2024-06-03 20:41:04,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:04,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999693050] [2024-06-03 20:41:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:04,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:04,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:04,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999693050] [2024-06-03 20:41:04,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999693050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:04,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:04,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277334508] [2024-06-03 20:41:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:04,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:04,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:04,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:04,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 348 transitions, 5899 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:04,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:04,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:04,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:05,472 INFO L124 PetriNetUnfolderBase]: 2072/3448 cut-off events. [2024-06-03 20:41:05,472 INFO L125 PetriNetUnfolderBase]: For 119899/119901 co-relation queries the response was YES. [2024-06-03 20:41:05,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26990 conditions, 3448 events. 2072/3448 cut-off events. For 119899/119901 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20388 event pairs, 439 based on Foata normal form. 1/3444 useless extension candidates. Maximal degree in co-relation 26884. Up to 2790 conditions per place. [2024-06-03 20:41:05,508 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 139 changer transitions 0/375 dead transitions. [2024-06-03 20:41:05,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 375 transitions, 7015 flow [2024-06-03 20:41:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:41:05,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:41:05,510 INFO L175 Difference]: Start difference. First operand has 223 places, 348 transitions, 5899 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:41:05,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 375 transitions, 7015 flow [2024-06-03 20:41:05,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 375 transitions, 6714 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:41:05,790 INFO L231 Difference]: Finished difference. Result has 224 places, 357 transitions, 6123 flow [2024-06-03 20:41:05,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5598, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6123, PETRI_PLACES=224, PETRI_TRANSITIONS=357} [2024-06-03 20:41:05,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-03 20:41:05,791 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 357 transitions, 6123 flow [2024-06-03 20:41:05,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:05,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:05,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:05,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:41:05,792 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:05,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:05,793 INFO L85 PathProgramCache]: Analyzing trace with hash 605736899, now seen corresponding path program 10 times [2024-06-03 20:41:05,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:05,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078433364] [2024-06-03 20:41:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:05,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:06,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:06,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078433364] [2024-06-03 20:41:06,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078433364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:06,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:06,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:06,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504425009] [2024-06-03 20:41:06,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:06,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:06,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:06,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:06,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 357 transitions, 6123 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:06,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:06,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:06,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:06,597 INFO L124 PetriNetUnfolderBase]: 2074/3445 cut-off events. [2024-06-03 20:41:06,597 INFO L125 PetriNetUnfolderBase]: For 125600/125602 co-relation queries the response was YES. [2024-06-03 20:41:06,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27361 conditions, 3445 events. 2074/3445 cut-off events. For 125600/125602 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20315 event pairs, 430 based on Foata normal form. 2/3442 useless extension candidates. Maximal degree in co-relation 27253. Up to 2792 conditions per place. [2024-06-03 20:41:06,635 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 136 changer transitions 0/377 dead transitions. [2024-06-03 20:41:06,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 377 transitions, 7141 flow [2024-06-03 20:41:06,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:06,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-03 20:41:06,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-03 20:41:06,636 INFO L175 Difference]: Start difference. First operand has 224 places, 357 transitions, 6123 flow. Second operand 9 states and 197 transitions. [2024-06-03 20:41:06,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 377 transitions, 7141 flow [2024-06-03 20:41:06,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 377 transitions, 6859 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:06,905 INFO L231 Difference]: Finished difference. Result has 229 places, 360 transitions, 6190 flow [2024-06-03 20:41:06,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5846, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6190, PETRI_PLACES=229, PETRI_TRANSITIONS=360} [2024-06-03 20:41:06,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-03 20:41:06,906 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 360 transitions, 6190 flow [2024-06-03 20:41:06,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:06,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:06,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:06,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:41:06,907 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:06,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash 611450819, now seen corresponding path program 11 times [2024-06-03 20:41:06,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:06,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130588046] [2024-06-03 20:41:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130588046] [2024-06-03 20:41:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130588046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:07,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:07,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:07,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137987273] [2024-06-03 20:41:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:07,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:07,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:07,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:07,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 360 transitions, 6190 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:07,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:07,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:07,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:07,737 INFO L124 PetriNetUnfolderBase]: 2071/3446 cut-off events. [2024-06-03 20:41:07,737 INFO L125 PetriNetUnfolderBase]: For 129089/129091 co-relation queries the response was YES. [2024-06-03 20:41:07,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27385 conditions, 3446 events. 2071/3446 cut-off events. For 129089/129091 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20385 event pairs, 430 based on Foata normal form. 1/3442 useless extension candidates. Maximal degree in co-relation 27276. Up to 2790 conditions per place. [2024-06-03 20:41:07,773 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 231 selfloop transitions, 138 changer transitions 0/375 dead transitions. [2024-06-03 20:41:07,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 375 transitions, 7054 flow [2024-06-03 20:41:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 20:41:07,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 20:41:07,774 INFO L175 Difference]: Start difference. First operand has 229 places, 360 transitions, 6190 flow. Second operand 8 states and 177 transitions. [2024-06-03 20:41:07,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 375 transitions, 7054 flow [2024-06-03 20:41:08,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 375 transitions, 6740 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:08,069 INFO L231 Difference]: Finished difference. Result has 232 places, 360 transitions, 6158 flow [2024-06-03 20:41:08,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6158, PETRI_PLACES=232, PETRI_TRANSITIONS=360} [2024-06-03 20:41:08,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-03 20:41:08,070 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 360 transitions, 6158 flow [2024-06-03 20:41:08,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:08,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:08,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:08,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:41:08,070 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:08,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:08,071 INFO L85 PathProgramCache]: Analyzing trace with hash 605745827, now seen corresponding path program 3 times [2024-06-03 20:41:08,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:08,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001543832] [2024-06-03 20:41:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:08,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:08,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:08,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001543832] [2024-06-03 20:41:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001543832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:08,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:08,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:08,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275484723] [2024-06-03 20:41:08,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:08,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:41:08,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 360 transitions, 6158 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) [2024-06-03 20:41:08,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:08,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:41:08,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:08,903 INFO L124 PetriNetUnfolderBase]: 2035/3414 cut-off events. [2024-06-03 20:41:08,903 INFO L125 PetriNetUnfolderBase]: For 142234/142273 co-relation queries the response was YES. [2024-06-03 20:41:08,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27200 conditions, 3414 events. 2035/3414 cut-off events. For 142234/142273 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20499 event pairs, 423 based on Foata normal form. 10/3405 useless extension candidates. Maximal degree in co-relation 27090. Up to 2870 conditions per place. [2024-06-03 20:41:08,943 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 288 selfloop transitions, 39 changer transitions 0/374 dead transitions. [2024-06-03 20:41:08,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 374 transitions, 6890 flow [2024-06-03 20:41:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:41:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:41:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 20:41:08,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:41:08,945 INFO L175 Difference]: Start difference. First operand has 232 places, 360 transitions, 6158 flow. Second operand 6 states and 135 transitions. [2024-06-03 20:41:08,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 374 transitions, 6890 flow [2024-06-03 20:41:09,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 374 transitions, 6578 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:09,218 INFO L231 Difference]: Finished difference. Result has 232 places, 361 transitions, 5947 flow [2024-06-03 20:41:09,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5846, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5947, PETRI_PLACES=232, PETRI_TRANSITIONS=361} [2024-06-03 20:41:09,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-03 20:41:09,219 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 361 transitions, 5947 flow [2024-06-03 20:41:09,219 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) [2024-06-03 20:41:09,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:09,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:09,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:41:09,219 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:09,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash 620030627, now seen corresponding path program 4 times [2024-06-03 20:41:09,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:09,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82958678] [2024-06-03 20:41:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:09,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:09,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:09,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82958678] [2024-06-03 20:41:09,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82958678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:09,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:09,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:09,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863972578] [2024-06-03 20:41:09,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:09,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:09,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:09,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:09,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:09,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:41:09,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 361 transitions, 5947 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) [2024-06-03 20:41:09,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:09,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:41:09,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:10,007 INFO L124 PetriNetUnfolderBase]: 2037/3415 cut-off events. [2024-06-03 20:41:10,007 INFO L125 PetriNetUnfolderBase]: For 140877/140916 co-relation queries the response was YES. [2024-06-03 20:41:10,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26849 conditions, 3415 events. 2037/3415 cut-off events. For 140877/140916 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20491 event pairs, 417 based on Foata normal form. 8/3404 useless extension candidates. Maximal degree in co-relation 26738. Up to 2764 conditions per place. [2024-06-03 20:41:10,046 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 288 selfloop transitions, 43 changer transitions 0/378 dead transitions. [2024-06-03 20:41:10,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 378 transitions, 6711 flow [2024-06-03 20:41:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:41:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:41:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 20:41:10,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 20:41:10,048 INFO L175 Difference]: Start difference. First operand has 232 places, 361 transitions, 5947 flow. Second operand 6 states and 137 transitions. [2024-06-03 20:41:10,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 378 transitions, 6711 flow [2024-06-03 20:41:10,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 378 transitions, 6618 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:10,308 INFO L231 Difference]: Finished difference. Result has 234 places, 362 transitions, 5964 flow [2024-06-03 20:41:10,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5964, PETRI_PLACES=234, PETRI_TRANSITIONS=362} [2024-06-03 20:41:10,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-03 20:41:10,309 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 362 transitions, 5964 flow [2024-06-03 20:41:10,309 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) [2024-06-03 20:41:10,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:10,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:10,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:41:10,310 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:10,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:10,310 INFO L85 PathProgramCache]: Analyzing trace with hash 716750777, now seen corresponding path program 1 times [2024-06-03 20:41:10,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:10,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011024526] [2024-06-03 20:41:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:10,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:10,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011024526] [2024-06-03 20:41:10,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011024526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:10,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:10,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:10,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161613216] [2024-06-03 20:41:10,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:10,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:10,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:10,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:10,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:10,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:41:10,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 362 transitions, 5964 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:10,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:10,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:41:10,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:11,136 INFO L124 PetriNetUnfolderBase]: 2148/3593 cut-off events. [2024-06-03 20:41:11,137 INFO L125 PetriNetUnfolderBase]: For 161055/161060 co-relation queries the response was YES. [2024-06-03 20:41:11,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28502 conditions, 3593 events. 2148/3593 cut-off events. For 161055/161060 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21736 event pairs, 390 based on Foata normal form. 16/3595 useless extension candidates. Maximal degree in co-relation 28390. Up to 2641 conditions per place. [2024-06-03 20:41:11,174 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 265 selfloop transitions, 105 changer transitions 0/394 dead transitions. [2024-06-03 20:41:11,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 394 transitions, 7014 flow [2024-06-03 20:41:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:41:11,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:41:11,175 INFO L175 Difference]: Start difference. First operand has 234 places, 362 transitions, 5964 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:41:11,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 394 transitions, 7014 flow [2024-06-03 20:41:11,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 394 transitions, 6920 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:11,543 INFO L231 Difference]: Finished difference. Result has 237 places, 366 transitions, 6165 flow [2024-06-03 20:41:11,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6165, PETRI_PLACES=237, PETRI_TRANSITIONS=366} [2024-06-03 20:41:11,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-03 20:41:11,544 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 366 transitions, 6165 flow [2024-06-03 20:41:11,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:11,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:11,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:11,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:41:11,544 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:11,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:11,545 INFO L85 PathProgramCache]: Analyzing trace with hash 716811227, now seen corresponding path program 2 times [2024-06-03 20:41:11,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:11,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138928352] [2024-06-03 20:41:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:11,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:11,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138928352] [2024-06-03 20:41:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138928352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:11,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:11,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001979603] [2024-06-03 20:41:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:11,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:11,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:11,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:41:11,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 366 transitions, 6165 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:11,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:11,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:41:11,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:12,378 INFO L124 PetriNetUnfolderBase]: 2189/3656 cut-off events. [2024-06-03 20:41:12,378 INFO L125 PetriNetUnfolderBase]: For 169602/169607 co-relation queries the response was YES. [2024-06-03 20:41:12,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29419 conditions, 3656 events. 2189/3656 cut-off events. For 169602/169607 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22088 event pairs, 456 based on Foata normal form. 16/3658 useless extension candidates. Maximal degree in co-relation 29306. Up to 3004 conditions per place. [2024-06-03 20:41:12,416 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 262 selfloop transitions, 102 changer transitions 0/388 dead transitions. [2024-06-03 20:41:12,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 388 transitions, 7027 flow [2024-06-03 20:41:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:41:12,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:41:12,417 INFO L175 Difference]: Start difference. First operand has 237 places, 366 transitions, 6165 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:41:12,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 388 transitions, 7027 flow [2024-06-03 20:41:12,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 388 transitions, 6882 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 20:41:12,694 INFO L231 Difference]: Finished difference. Result has 241 places, 368 transitions, 6280 flow [2024-06-03 20:41:12,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6024, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6280, PETRI_PLACES=241, PETRI_TRANSITIONS=368} [2024-06-03 20:41:12,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-03 20:41:12,695 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 368 transitions, 6280 flow [2024-06-03 20:41:12,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:12,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:12,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:12,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:41:12,696 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:12,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash 262911341, now seen corresponding path program 3 times [2024-06-03 20:41:12,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:12,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847511623] [2024-06-03 20:41:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:12,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:12,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:12,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847511623] [2024-06-03 20:41:12,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847511623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:12,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:12,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:12,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202543683] [2024-06-03 20:41:12,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:12,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:12,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:13,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:41:13,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 368 transitions, 6280 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) [2024-06-03 20:41:13,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:13,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:41:13,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:13,648 INFO L124 PetriNetUnfolderBase]: 2161/3616 cut-off events. [2024-06-03 20:41:13,648 INFO L125 PetriNetUnfolderBase]: For 161917/161922 co-relation queries the response was YES. [2024-06-03 20:41:13,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28821 conditions, 3616 events. 2161/3616 cut-off events. For 161917/161922 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21881 event pairs, 446 based on Foata normal form. 16/3618 useless extension candidates. Maximal degree in co-relation 28706. Up to 2966 conditions per place. [2024-06-03 20:41:13,693 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 262 selfloop transitions, 103 changer transitions 0/389 dead transitions. [2024-06-03 20:41:13,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 389 transitions, 7104 flow [2024-06-03 20:41:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 20:41:13,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-03 20:41:13,694 INFO L175 Difference]: Start difference. First operand has 241 places, 368 transitions, 6280 flow. Second operand 8 states and 183 transitions. [2024-06-03 20:41:13,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 389 transitions, 7104 flow [2024-06-03 20:41:13,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 389 transitions, 6886 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:13,974 INFO L231 Difference]: Finished difference. Result has 244 places, 368 transitions, 6278 flow [2024-06-03 20:41:13,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6062, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6278, PETRI_PLACES=244, PETRI_TRANSITIONS=368} [2024-06-03 20:41:13,974 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-03 20:41:13,974 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 368 transitions, 6278 flow [2024-06-03 20:41:13,975 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) [2024-06-03 20:41:13,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:13,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:13,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:41:13,975 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:13,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash 263096039, now seen corresponding path program 1 times [2024-06-03 20:41:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134284582] [2024-06-03 20:41:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:14,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:14,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134284582] [2024-06-03 20:41:14,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134284582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:14,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:14,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:14,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675738321] [2024-06-03 20:41:14,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:14,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:14,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:14,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:14,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:14,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:14,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 368 transitions, 6278 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:41:14,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:14,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:14,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:14,861 INFO L124 PetriNetUnfolderBase]: 2223/3708 cut-off events. [2024-06-03 20:41:14,862 INFO L125 PetriNetUnfolderBase]: For 157138/157140 co-relation queries the response was YES. [2024-06-03 20:41:14,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29218 conditions, 3708 events. 2223/3708 cut-off events. For 157138/157140 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22475 event pairs, 858 based on Foata normal form. 2/3709 useless extension candidates. Maximal degree in co-relation 29102. Up to 3325 conditions per place. [2024-06-03 20:41:14,901 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 335 selfloop transitions, 48 changer transitions 0/389 dead transitions. [2024-06-03 20:41:14,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 389 transitions, 7147 flow [2024-06-03 20:41:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 20:41:14,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 20:41:14,903 INFO L175 Difference]: Start difference. First operand has 244 places, 368 transitions, 6278 flow. Second operand 8 states and 171 transitions. [2024-06-03 20:41:14,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 389 transitions, 7147 flow [2024-06-03 20:41:15,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 389 transitions, 6907 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:41:15,182 INFO L231 Difference]: Finished difference. Result has 245 places, 370 transitions, 6177 flow [2024-06-03 20:41:15,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6038, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6177, PETRI_PLACES=245, PETRI_TRANSITIONS=370} [2024-06-03 20:41:15,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-03 20:41:15,183 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 370 transitions, 6177 flow [2024-06-03 20:41:15,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-03 20:41:15,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:15,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:15,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:41:15,184 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:15,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash 611465699, now seen corresponding path program 2 times [2024-06-03 20:41:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:15,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766241422] [2024-06-03 20:41:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:15,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:15,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:15,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766241422] [2024-06-03 20:41:15,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766241422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:15,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:15,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:15,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982846469] [2024-06-03 20:41:15,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:15,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:15,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:15,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:15,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:15,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:15,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 370 transitions, 6177 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:15,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:15,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:15,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:16,021 INFO L124 PetriNetUnfolderBase]: 2231/3715 cut-off events. [2024-06-03 20:41:16,021 INFO L125 PetriNetUnfolderBase]: For 160657/160659 co-relation queries the response was YES. [2024-06-03 20:41:16,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29107 conditions, 3715 events. 2231/3715 cut-off events. For 160657/160659 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22488 event pairs, 859 based on Foata normal form. 2/3716 useless extension candidates. Maximal degree in co-relation 28990. Up to 3358 conditions per place. [2024-06-03 20:41:16,058 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 352 selfloop transitions, 30 changer transitions 0/388 dead transitions. [2024-06-03 20:41:16,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 388 transitions, 7036 flow [2024-06-03 20:41:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 20:41:16,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-03 20:41:16,059 INFO L175 Difference]: Start difference. First operand has 245 places, 370 transitions, 6177 flow. Second operand 8 states and 166 transitions. [2024-06-03 20:41:16,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 388 transitions, 7036 flow [2024-06-03 20:41:16,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 388 transitions, 6913 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:16,345 INFO L231 Difference]: Finished difference. Result has 247 places, 372 transitions, 6161 flow [2024-06-03 20:41:16,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6054, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6161, PETRI_PLACES=247, PETRI_TRANSITIONS=372} [2024-06-03 20:41:16,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-03 20:41:16,345 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 372 transitions, 6161 flow [2024-06-03 20:41:16,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:16,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:16,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:16,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:41:16,346 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:16,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash 620036579, now seen corresponding path program 3 times [2024-06-03 20:41:16,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:16,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347072262] [2024-06-03 20:41:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:16,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:16,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:16,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347072262] [2024-06-03 20:41:16,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347072262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:16,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:16,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:16,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058790875] [2024-06-03 20:41:16,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:16,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:16,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:16,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:16,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:16,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:16,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 372 transitions, 6161 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:16,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:16,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:16,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:17,206 INFO L124 PetriNetUnfolderBase]: 2285/3789 cut-off events. [2024-06-03 20:41:17,207 INFO L125 PetriNetUnfolderBase]: For 176005/176007 co-relation queries the response was YES. [2024-06-03 20:41:17,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30028 conditions, 3789 events. 2285/3789 cut-off events. For 176005/176007 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22920 event pairs, 861 based on Foata normal form. 2/3790 useless extension candidates. Maximal degree in co-relation 29910. Up to 3349 conditions per place. [2024-06-03 20:41:17,249 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 33 changer transitions 0/397 dead transitions. [2024-06-03 20:41:17,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 397 transitions, 7220 flow [2024-06-03 20:41:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 20:41:17,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 20:41:17,250 INFO L175 Difference]: Start difference. First operand has 247 places, 372 transitions, 6161 flow. Second operand 8 states and 171 transitions. [2024-06-03 20:41:17,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 397 transitions, 7220 flow [2024-06-03 20:41:17,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 397 transitions, 7139 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:17,577 INFO L231 Difference]: Finished difference. Result has 250 places, 375 transitions, 6207 flow [2024-06-03 20:41:17,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6080, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6207, PETRI_PLACES=250, PETRI_TRANSITIONS=375} [2024-06-03 20:41:17,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-03 20:41:17,578 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 375 transitions, 6207 flow [2024-06-03 20:41:17,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:17,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:17,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:17,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:41:17,579 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:17,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash 383564549, now seen corresponding path program 4 times [2024-06-03 20:41:17,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:17,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364600668] [2024-06-03 20:41:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:17,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:17,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:17,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364600668] [2024-06-03 20:41:17,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364600668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:17,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:17,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:17,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327961071] [2024-06-03 20:41:17,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:17,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:17,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:17,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:17,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:17,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:17,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 375 transitions, 6207 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:17,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:17,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:17,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:18,476 INFO L124 PetriNetUnfolderBase]: 2280/3782 cut-off events. [2024-06-03 20:41:18,476 INFO L125 PetriNetUnfolderBase]: For 179733/179735 co-relation queries the response was YES. [2024-06-03 20:41:18,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30069 conditions, 3782 events. 2280/3782 cut-off events. For 179733/179735 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22842 event pairs, 871 based on Foata normal form. 2/3783 useless extension candidates. Maximal degree in co-relation 29950. Up to 3433 conditions per place. [2024-06-03 20:41:18,517 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 31 changer transitions 0/395 dead transitions. [2024-06-03 20:41:18,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 395 transitions, 7098 flow [2024-06-03 20:41:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 20:41:18,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:41:18,519 INFO L175 Difference]: Start difference. First operand has 250 places, 375 transitions, 6207 flow. Second operand 7 states and 154 transitions. [2024-06-03 20:41:18,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 395 transitions, 7098 flow [2024-06-03 20:41:18,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 395 transitions, 7027 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:18,865 INFO L231 Difference]: Finished difference. Result has 253 places, 377 transitions, 6253 flow [2024-06-03 20:41:18,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6253, PETRI_PLACES=253, PETRI_TRANSITIONS=377} [2024-06-03 20:41:18,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-03 20:41:18,866 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 377 transitions, 6253 flow [2024-06-03 20:41:18,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:18,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:18,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:18,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:41:18,866 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:18,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash -810509931, now seen corresponding path program 1 times [2024-06-03 20:41:18,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:18,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200482927] [2024-06-03 20:41:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:18,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:19,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:19,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200482927] [2024-06-03 20:41:19,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200482927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:19,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:19,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097348372] [2024-06-03 20:41:19,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:19,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:19,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:19,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:19,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:19,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 377 transitions, 6253 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:19,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:19,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:19,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:19,986 INFO L124 PetriNetUnfolderBase]: 2386/3960 cut-off events. [2024-06-03 20:41:19,987 INFO L125 PetriNetUnfolderBase]: For 197335/197337 co-relation queries the response was YES. [2024-06-03 20:41:20,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31460 conditions, 3960 events. 2386/3960 cut-off events. For 197335/197337 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24032 event pairs, 442 based on Foata normal form. 8/3965 useless extension candidates. Maximal degree in co-relation 31339. Up to 3393 conditions per place. [2024-06-03 20:41:20,034 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 362 selfloop transitions, 52 changer transitions 0/420 dead transitions. [2024-06-03 20:41:20,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 420 transitions, 7471 flow [2024-06-03 20:41:20,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:41:20,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:41:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-03 20:41:20,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:41:20,035 INFO L175 Difference]: Start difference. First operand has 253 places, 377 transitions, 6253 flow. Second operand 10 states and 205 transitions. [2024-06-03 20:41:20,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 420 transitions, 7471 flow [2024-06-03 20:41:20,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 420 transitions, 7383 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:20,487 INFO L231 Difference]: Finished difference. Result has 261 places, 386 transitions, 6412 flow [2024-06-03 20:41:20,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6165, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6412, PETRI_PLACES=261, PETRI_TRANSITIONS=386} [2024-06-03 20:41:20,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-03 20:41:20,488 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 386 transitions, 6412 flow [2024-06-03 20:41:20,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:20,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:20,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:20,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:41:20,489 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:20,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1439007411, now seen corresponding path program 2 times [2024-06-03 20:41:20,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:20,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274458395] [2024-06-03 20:41:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:20,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:20,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:20,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274458395] [2024-06-03 20:41:20,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274458395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:20,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:20,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:20,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028053170] [2024-06-03 20:41:20,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:20,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:20,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:20,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:20,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:20,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:20,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 386 transitions, 6412 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:20,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:20,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:20,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:21,649 INFO L124 PetriNetUnfolderBase]: 2373/3937 cut-off events. [2024-06-03 20:41:21,650 INFO L125 PetriNetUnfolderBase]: For 196755/196757 co-relation queries the response was YES. [2024-06-03 20:41:21,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31375 conditions, 3937 events. 2373/3937 cut-off events. For 196755/196757 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23899 event pairs, 452 based on Foata normal form. 8/3944 useless extension candidates. Maximal degree in co-relation 31250. Up to 3460 conditions per place. [2024-06-03 20:41:21,693 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 367 selfloop transitions, 47 changer transitions 0/420 dead transitions. [2024-06-03 20:41:21,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 420 transitions, 7445 flow [2024-06-03 20:41:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:41:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:41:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-03 20:41:21,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-03 20:41:21,694 INFO L175 Difference]: Start difference. First operand has 261 places, 386 transitions, 6412 flow. Second operand 10 states and 204 transitions. [2024-06-03 20:41:21,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 420 transitions, 7445 flow [2024-06-03 20:41:22,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 420 transitions, 7369 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:22,092 INFO L231 Difference]: Finished difference. Result has 267 places, 388 transitions, 6472 flow [2024-06-03 20:41:22,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6336, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6472, PETRI_PLACES=267, PETRI_TRANSITIONS=388} [2024-06-03 20:41:22,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-03 20:41:22,094 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 388 transitions, 6472 flow [2024-06-03 20:41:22,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:22,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:22,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:22,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:41:22,095 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:22,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash 411976021, now seen corresponding path program 3 times [2024-06-03 20:41:22,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:22,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355102419] [2024-06-03 20:41:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:22,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:22,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:22,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355102419] [2024-06-03 20:41:22,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355102419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:22,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:22,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:22,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350661196] [2024-06-03 20:41:22,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:22,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:22,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:22,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:22,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:22,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 388 transitions, 6472 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:22,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:22,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:22,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:23,229 INFO L124 PetriNetUnfolderBase]: 2453/4091 cut-off events. [2024-06-03 20:41:23,229 INFO L125 PetriNetUnfolderBase]: For 203655/203666 co-relation queries the response was YES. [2024-06-03 20:41:23,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32359 conditions, 4091 events. 2453/4091 cut-off events. For 203655/203666 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25168 event pairs, 345 based on Foata normal form. 8/4098 useless extension candidates. Maximal degree in co-relation 32231. Up to 3345 conditions per place. [2024-06-03 20:41:23,275 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 374 selfloop transitions, 63 changer transitions 0/443 dead transitions. [2024-06-03 20:41:23,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 443 transitions, 7845 flow [2024-06-03 20:41:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:41:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:41:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-03 20:41:23,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48577235772357724 [2024-06-03 20:41:23,277 INFO L175 Difference]: Start difference. First operand has 267 places, 388 transitions, 6472 flow. Second operand 12 states and 239 transitions. [2024-06-03 20:41:23,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 443 transitions, 7845 flow [2024-06-03 20:41:23,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 443 transitions, 7764 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:23,728 INFO L231 Difference]: Finished difference. Result has 276 places, 398 transitions, 6744 flow [2024-06-03 20:41:23,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6401, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6744, PETRI_PLACES=276, PETRI_TRANSITIONS=398} [2024-06-03 20:41:23,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-03 20:41:23,729 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 398 transitions, 6744 flow [2024-06-03 20:41:23,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:23,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:23,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:23,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:41:23,729 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:23,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:23,730 INFO L85 PathProgramCache]: Analyzing trace with hash -375492103, now seen corresponding path program 1 times [2024-06-03 20:41:23,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:23,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233281156] [2024-06-03 20:41:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:23,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:23,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:23,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233281156] [2024-06-03 20:41:23,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233281156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:23,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:24,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:41:24,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969728178] [2024-06-03 20:41:24,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:24,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:41:24,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:24,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:41:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:41:24,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:24,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 398 transitions, 6744 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:24,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:24,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:24,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:24,799 INFO L124 PetriNetUnfolderBase]: 2479/4121 cut-off events. [2024-06-03 20:41:24,800 INFO L125 PetriNetUnfolderBase]: For 209584/209586 co-relation queries the response was YES. [2024-06-03 20:41:24,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33227 conditions, 4121 events. 2479/4121 cut-off events. For 209584/209586 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25295 event pairs, 525 based on Foata normal form. 2/4117 useless extension candidates. Maximal degree in co-relation 33095. Up to 3378 conditions per place. [2024-06-03 20:41:24,850 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 278 selfloop transitions, 151 changer transitions 0/435 dead transitions. [2024-06-03 20:41:24,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 435 transitions, 8122 flow [2024-06-03 20:41:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 20:41:24,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-03 20:41:24,852 INFO L175 Difference]: Start difference. First operand has 276 places, 398 transitions, 6744 flow. Second operand 9 states and 188 transitions. [2024-06-03 20:41:24,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 435 transitions, 8122 flow [2024-06-03 20:41:25,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 435 transitions, 7991 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:25,295 INFO L231 Difference]: Finished difference. Result has 279 places, 410 transitions, 7146 flow [2024-06-03 20:41:25,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6613, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7146, PETRI_PLACES=279, PETRI_TRANSITIONS=410} [2024-06-03 20:41:25,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-03 20:41:25,295 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 410 transitions, 7146 flow [2024-06-03 20:41:25,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:25,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:25,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:25,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:41:25,296 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:25,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:25,297 INFO L85 PathProgramCache]: Analyzing trace with hash 249044167, now seen corresponding path program 2 times [2024-06-03 20:41:25,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:25,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831373572] [2024-06-03 20:41:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:25,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:25,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:25,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831373572] [2024-06-03 20:41:25,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831373572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:25,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:25,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:41:25,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681211200] [2024-06-03 20:41:25,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:25,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:41:25,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:25,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:41:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:41:25,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:25,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 410 transitions, 7146 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:25,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:25,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:25,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:26,360 INFO L124 PetriNetUnfolderBase]: 2489/4139 cut-off events. [2024-06-03 20:41:26,360 INFO L125 PetriNetUnfolderBase]: For 216235/216237 co-relation queries the response was YES. [2024-06-03 20:41:26,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33622 conditions, 4139 events. 2489/4139 cut-off events. For 216235/216237 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25403 event pairs, 525 based on Foata normal form. 2/4135 useless extension candidates. Maximal degree in co-relation 33490. Up to 3390 conditions per place. [2024-06-03 20:41:26,411 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 158 changer transitions 0/437 dead transitions. [2024-06-03 20:41:26,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 437 transitions, 8309 flow [2024-06-03 20:41:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 20:41:26,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-03 20:41:26,412 INFO L175 Difference]: Start difference. First operand has 279 places, 410 transitions, 7146 flow. Second operand 9 states and 183 transitions. [2024-06-03 20:41:26,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 437 transitions, 8309 flow [2024-06-03 20:41:26,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 437 transitions, 7875 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:26,867 INFO L231 Difference]: Finished difference. Result has 282 places, 416 transitions, 7161 flow [2024-06-03 20:41:26,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7161, PETRI_PLACES=282, PETRI_TRANSITIONS=416} [2024-06-03 20:41:26,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-03 20:41:26,868 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 416 transitions, 7161 flow [2024-06-03 20:41:26,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:26,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:26,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:26,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:41:26,869 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:26,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:26,869 INFO L85 PathProgramCache]: Analyzing trace with hash 249044353, now seen corresponding path program 1 times [2024-06-03 20:41:26,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:26,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326212834] [2024-06-03 20:41:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:26,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:27,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:27,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326212834] [2024-06-03 20:41:27,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326212834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:27,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:27,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:41:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505919629] [2024-06-03 20:41:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:27,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:41:27,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:41:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:41:27,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:27,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 416 transitions, 7161 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:27,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:27,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:27,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:27,962 INFO L124 PetriNetUnfolderBase]: 2594/4313 cut-off events. [2024-06-03 20:41:27,962 INFO L125 PetriNetUnfolderBase]: For 228830/228832 co-relation queries the response was YES. [2024-06-03 20:41:28,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35212 conditions, 4313 events. 2594/4313 cut-off events. For 228830/228832 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 26712 event pairs, 498 based on Foata normal form. 3/4313 useless extension candidates. Maximal degree in co-relation 35079. Up to 3584 conditions per place. [2024-06-03 20:41:28,023 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 334 selfloop transitions, 156 changer transitions 0/496 dead transitions. [2024-06-03 20:41:28,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 496 transitions, 9287 flow [2024-06-03 20:41:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:41:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:41:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-03 20:41:28,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:41:28,025 INFO L175 Difference]: Start difference. First operand has 282 places, 416 transitions, 7161 flow. Second operand 12 states and 246 transitions. [2024-06-03 20:41:28,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 496 transitions, 9287 flow [2024-06-03 20:41:28,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 496 transitions, 8965 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:28,489 INFO L231 Difference]: Finished difference. Result has 291 places, 451 transitions, 7930 flow [2024-06-03 20:41:28,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6903, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7930, PETRI_PLACES=291, PETRI_TRANSITIONS=451} [2024-06-03 20:41:28,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-03 20:41:28,490 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 451 transitions, 7930 flow [2024-06-03 20:41:28,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:28,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:28,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:28,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:41:28,490 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:28,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash 301703037, now seen corresponding path program 3 times [2024-06-03 20:41:28,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:28,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456267464] [2024-06-03 20:41:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:28,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:28,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:28,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456267464] [2024-06-03 20:41:28,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456267464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:28,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:28,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:28,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051302949] [2024-06-03 20:41:28,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:28,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:28,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:28,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:28,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:28,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 451 transitions, 7930 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:28,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:28,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:28,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:29,700 INFO L124 PetriNetUnfolderBase]: 2609/4351 cut-off events. [2024-06-03 20:41:29,700 INFO L125 PetriNetUnfolderBase]: For 244768/244770 co-relation queries the response was YES. [2024-06-03 20:41:29,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36165 conditions, 4351 events. 2609/4351 cut-off events. For 244768/244770 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 27088 event pairs, 527 based on Foata normal form. 3/4348 useless extension candidates. Maximal degree in co-relation 36028. Up to 3516 conditions per place. [2024-06-03 20:41:29,749 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 285 selfloop transitions, 189 changer transitions 0/480 dead transitions. [2024-06-03 20:41:29,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 480 transitions, 9333 flow [2024-06-03 20:41:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 20:41:29,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:41:29,750 INFO L175 Difference]: Start difference. First operand has 291 places, 451 transitions, 7930 flow. Second operand 8 states and 168 transitions. [2024-06-03 20:41:29,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 480 transitions, 9333 flow [2024-06-03 20:41:30,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 480 transitions, 9141 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:30,279 INFO L231 Difference]: Finished difference. Result has 293 places, 459 transitions, 8286 flow [2024-06-03 20:41:30,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7738, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8286, PETRI_PLACES=293, PETRI_TRANSITIONS=459} [2024-06-03 20:41:30,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-03 20:41:30,280 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 459 transitions, 8286 flow [2024-06-03 20:41:30,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:30,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:30,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:30,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:41:30,281 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:30,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:30,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2119170751, now seen corresponding path program 4 times [2024-06-03 20:41:30,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:30,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85928431] [2024-06-03 20:41:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:30,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:30,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:30,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85928431] [2024-06-03 20:41:30,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85928431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:30,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:30,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:30,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532990864] [2024-06-03 20:41:30,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:30,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:30,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:30,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:30,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:30,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 459 transitions, 8286 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:30,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:30,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:30,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:31,359 INFO L124 PetriNetUnfolderBase]: 2624/4373 cut-off events. [2024-06-03 20:41:31,360 INFO L125 PetriNetUnfolderBase]: For 252501/252503 co-relation queries the response was YES. [2024-06-03 20:41:31,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36989 conditions, 4373 events. 2624/4373 cut-off events. For 252501/252503 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27257 event pairs, 527 based on Foata normal form. 3/4370 useless extension candidates. Maximal degree in co-relation 36850. Up to 3534 conditions per place. [2024-06-03 20:41:31,418 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 195 changer transitions 0/484 dead transitions. [2024-06-03 20:41:31,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 484 transitions, 9587 flow [2024-06-03 20:41:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 20:41:31,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-03 20:41:31,423 INFO L175 Difference]: Start difference. First operand has 293 places, 459 transitions, 8286 flow. Second operand 8 states and 165 transitions. [2024-06-03 20:41:31,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 484 transitions, 9587 flow [2024-06-03 20:41:32,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 484 transitions, 8959 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-03 20:41:32,020 INFO L231 Difference]: Finished difference. Result has 294 places, 467 transitions, 8235 flow [2024-06-03 20:41:32,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7706, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8235, PETRI_PLACES=294, PETRI_TRANSITIONS=467} [2024-06-03 20:41:32,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-03 20:41:32,021 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 467 transitions, 8235 flow [2024-06-03 20:41:32,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:32,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:32,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:32,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:41:32,022 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:32,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2119170379, now seen corresponding path program 1 times [2024-06-03 20:41:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:32,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487222733] [2024-06-03 20:41:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:32,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:32,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487222733] [2024-06-03 20:41:32,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487222733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:32,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:32,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:32,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79284427] [2024-06-03 20:41:32,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:32,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:32,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:32,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:32,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:32,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:32,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 467 transitions, 8235 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:32,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:32,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:32,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:33,160 INFO L124 PetriNetUnfolderBase]: 2634/4391 cut-off events. [2024-06-03 20:41:33,160 INFO L125 PetriNetUnfolderBase]: For 255367/255369 co-relation queries the response was YES. [2024-06-03 20:41:33,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36916 conditions, 4391 events. 2634/4391 cut-off events. For 255367/255369 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 27471 event pairs, 501 based on Foata normal form. 4/4392 useless extension candidates. Maximal degree in co-relation 36777. Up to 3740 conditions per place. [2024-06-03 20:41:33,217 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 360 selfloop transitions, 135 changer transitions 0/501 dead transitions. [2024-06-03 20:41:33,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 501 transitions, 9579 flow [2024-06-03 20:41:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:41:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:41:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-03 20:41:33,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-03 20:41:33,219 INFO L175 Difference]: Start difference. First operand has 294 places, 467 transitions, 8235 flow. Second operand 11 states and 228 transitions. [2024-06-03 20:41:33,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 501 transitions, 9579 flow [2024-06-03 20:41:33,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 501 transitions, 9239 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:33,789 INFO L231 Difference]: Finished difference. Result has 302 places, 473 transitions, 8359 flow [2024-06-03 20:41:33,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7899, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8359, PETRI_PLACES=302, PETRI_TRANSITIONS=473} [2024-06-03 20:41:33,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-03 20:41:33,790 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 473 transitions, 8359 flow [2024-06-03 20:41:33,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:33,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:33,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:33,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:41:33,790 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:33,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash 2007649687, now seen corresponding path program 2 times [2024-06-03 20:41:33,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:33,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497686975] [2024-06-03 20:41:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:33,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:34,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:34,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497686975] [2024-06-03 20:41:34,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497686975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:34,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:34,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:41:34,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057643887] [2024-06-03 20:41:34,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:34,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:41:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:41:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:41:34,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:34,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 473 transitions, 8359 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:34,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:34,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:34,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:35,003 INFO L124 PetriNetUnfolderBase]: 2644/4403 cut-off events. [2024-06-03 20:41:35,004 INFO L125 PetriNetUnfolderBase]: For 260237/260239 co-relation queries the response was YES. [2024-06-03 20:41:35,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36773 conditions, 4403 events. 2644/4403 cut-off events. For 260237/260239 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27417 event pairs, 499 based on Foata normal form. 4/4404 useless extension candidates. Maximal degree in co-relation 36631. Up to 3752 conditions per place. [2024-06-03 20:41:35,059 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 362 selfloop transitions, 141 changer transitions 0/509 dead transitions. [2024-06-03 20:41:35,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 509 transitions, 9820 flow [2024-06-03 20:41:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:41:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:41:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 283 transitions. [2024-06-03 20:41:35,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930313588850174 [2024-06-03 20:41:35,074 INFO L175 Difference]: Start difference. First operand has 302 places, 473 transitions, 8359 flow. Second operand 14 states and 283 transitions. [2024-06-03 20:41:35,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 509 transitions, 9820 flow [2024-06-03 20:41:35,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 509 transitions, 9520 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-03 20:41:35,737 INFO L231 Difference]: Finished difference. Result has 308 places, 478 transitions, 8471 flow [2024-06-03 20:41:35,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8071, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8471, PETRI_PLACES=308, PETRI_TRANSITIONS=478} [2024-06-03 20:41:35,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-03 20:41:35,737 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 478 transitions, 8471 flow [2024-06-03 20:41:35,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:35,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:35,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:35,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:41:35,738 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:35,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:35,738 INFO L85 PathProgramCache]: Analyzing trace with hash 305726403, now seen corresponding path program 2 times [2024-06-03 20:41:35,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:35,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946055926] [2024-06-03 20:41:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:35,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:36,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:36,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946055926] [2024-06-03 20:41:36,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946055926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:36,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:36,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:41:36,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737038390] [2024-06-03 20:41:36,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:36,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:41:36,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:36,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:41:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:41:36,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:36,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 478 transitions, 8471 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:36,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:36,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:36,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:36,927 INFO L124 PetriNetUnfolderBase]: 2657/4427 cut-off events. [2024-06-03 20:41:36,927 INFO L125 PetriNetUnfolderBase]: For 260992/260994 co-relation queries the response was YES. [2024-06-03 20:41:36,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37025 conditions, 4427 events. 2657/4427 cut-off events. For 260992/260994 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27690 event pairs, 499 based on Foata normal form. 3/4427 useless extension candidates. Maximal degree in co-relation 36882. Up to 3650 conditions per place. [2024-06-03 20:41:36,985 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 348 selfloop transitions, 172 changer transitions 0/526 dead transitions. [2024-06-03 20:41:36,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 526 transitions, 10248 flow [2024-06-03 20:41:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:41:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:41:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-03 20:41:36,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:41:36,987 INFO L175 Difference]: Start difference. First operand has 308 places, 478 transitions, 8471 flow. Second operand 12 states and 246 transitions. [2024-06-03 20:41:36,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 526 transitions, 10248 flow [2024-06-03 20:41:37,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 526 transitions, 10005 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-03 20:41:37,615 INFO L231 Difference]: Finished difference. Result has 312 places, 485 transitions, 8716 flow [2024-06-03 20:41:37,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8234, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8716, PETRI_PLACES=312, PETRI_TRANSITIONS=485} [2024-06-03 20:41:37,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-03 20:41:37,616 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 485 transitions, 8716 flow [2024-06-03 20:41:37,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:37,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:37,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:37,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:41:37,617 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:37,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:37,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1615496381, now seen corresponding path program 5 times [2024-06-03 20:41:37,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:37,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137740444] [2024-06-03 20:41:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:37,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:37,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:37,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137740444] [2024-06-03 20:41:37,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137740444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:37,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:37,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:41:37,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311026782] [2024-06-03 20:41:37,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:37,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:41:37,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:37,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:41:37,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:41:37,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:37,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 485 transitions, 8716 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:37,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:37,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:37,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:38,775 INFO L124 PetriNetUnfolderBase]: 2648/4419 cut-off events. [2024-06-03 20:41:38,775 INFO L125 PetriNetUnfolderBase]: For 261178/261180 co-relation queries the response was YES. [2024-06-03 20:41:38,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36881 conditions, 4419 events. 2648/4419 cut-off events. For 261178/261180 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27694 event pairs, 525 based on Foata normal form. 3/4416 useless extension candidates. Maximal degree in co-relation 36737. Up to 3571 conditions per place. [2024-06-03 20:41:38,833 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 296 selfloop transitions, 201 changer transitions 0/503 dead transitions. [2024-06-03 20:41:38,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 503 transitions, 9886 flow [2024-06-03 20:41:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-03 20:41:38,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-03 20:41:38,834 INFO L175 Difference]: Start difference. First operand has 312 places, 485 transitions, 8716 flow. Second operand 9 states and 181 transitions. [2024-06-03 20:41:38,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 503 transitions, 9886 flow [2024-06-03 20:41:39,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 503 transitions, 9637 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:39,458 INFO L231 Difference]: Finished difference. Result has 315 places, 485 transitions, 8882 flow [2024-06-03 20:41:39,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8467, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8882, PETRI_PLACES=315, PETRI_TRANSITIONS=485} [2024-06-03 20:41:39,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-03 20:41:39,459 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 485 transitions, 8882 flow [2024-06-03 20:41:39,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:39,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:39,459 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] [2024-06-03 20:41:39,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:41:39,460 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:39,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2115451309, now seen corresponding path program 3 times [2024-06-03 20:41:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:39,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468096020] [2024-06-03 20:41:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468096020] [2024-06-03 20:41:39,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468096020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:39,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:39,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:41:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016623730] [2024-06-03 20:41:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:41:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:41:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:41:39,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:39,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 485 transitions, 8882 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:39,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:39,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:39,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:40,715 INFO L124 PetriNetUnfolderBase]: 2642/4410 cut-off events. [2024-06-03 20:41:40,715 INFO L125 PetriNetUnfolderBase]: For 263969/263971 co-relation queries the response was YES. [2024-06-03 20:41:40,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36956 conditions, 4410 events. 2642/4410 cut-off events. For 263969/263971 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 27621 event pairs, 499 based on Foata normal form. 4/4411 useless extension candidates. Maximal degree in co-relation 36811. Up to 3752 conditions per place. [2024-06-03 20:41:40,777 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 368 selfloop transitions, 139 changer transitions 0/513 dead transitions. [2024-06-03 20:41:40,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 513 transitions, 10123 flow [2024-06-03 20:41:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:41:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:41:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-03 20:41:40,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-03 20:41:40,779 INFO L175 Difference]: Start difference. First operand has 315 places, 485 transitions, 8882 flow. Second operand 12 states and 248 transitions. [2024-06-03 20:41:40,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 513 transitions, 10123 flow [2024-06-03 20:41:41,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 513 transitions, 9532 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 20:41:41,535 INFO L231 Difference]: Finished difference. Result has 318 places, 485 transitions, 8580 flow [2024-06-03 20:41:41,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8291, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8580, PETRI_PLACES=318, PETRI_TRANSITIONS=485} [2024-06-03 20:41:41,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-03 20:41:41,536 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 485 transitions, 8580 flow [2024-06-03 20:41:41,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:41,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:41,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:41,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:41:41,536 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:41,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:41,537 INFO L85 PathProgramCache]: Analyzing trace with hash -366117517, now seen corresponding path program 3 times [2024-06-03 20:41:41,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:41,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435028456] [2024-06-03 20:41:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:41,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:41,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:41,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435028456] [2024-06-03 20:41:41,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435028456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:41,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:41,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:41:41,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092783371] [2024-06-03 20:41:41,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:41,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:41:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:41:41,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:41:41,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:41,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 485 transitions, 8580 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:41,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:41,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:41,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:42,712 INFO L124 PetriNetUnfolderBase]: 2639/4401 cut-off events. [2024-06-03 20:41:42,712 INFO L125 PetriNetUnfolderBase]: For 264005/264007 co-relation queries the response was YES. [2024-06-03 20:41:42,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36637 conditions, 4401 events. 2639/4401 cut-off events. For 264005/264007 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27524 event pairs, 499 based on Foata normal form. 3/4401 useless extension candidates. Maximal degree in co-relation 36491. Up to 3633 conditions per place. [2024-06-03 20:41:42,770 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 349 selfloop transitions, 170 changer transitions 0/525 dead transitions. [2024-06-03 20:41:42,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 525 transitions, 10105 flow [2024-06-03 20:41:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:41:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:41:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-03 20:41:42,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49796747967479676 [2024-06-03 20:41:42,772 INFO L175 Difference]: Start difference. First operand has 318 places, 485 transitions, 8580 flow. Second operand 12 states and 245 transitions. [2024-06-03 20:41:42,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 525 transitions, 10105 flow [2024-06-03 20:41:43,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 525 transitions, 9734 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-06-03 20:41:43,424 INFO L231 Difference]: Finished difference. Result has 318 places, 485 transitions, 8559 flow [2024-06-03 20:41:43,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8213, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8559, PETRI_PLACES=318, PETRI_TRANSITIONS=485} [2024-06-03 20:41:43,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-03 20:41:43,425 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 485 transitions, 8559 flow [2024-06-03 20:41:43,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:43,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:43,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:43,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:41:43,426 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:43,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:43,426 INFO L85 PathProgramCache]: Analyzing trace with hash -366112123, now seen corresponding path program 6 times [2024-06-03 20:41:43,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:43,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377921122] [2024-06-03 20:41:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:43,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377921122] [2024-06-03 20:41:43,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377921122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:43,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:43,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:41:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557290494] [2024-06-03 20:41:43,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:43,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:41:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:43,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:41:43,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:41:43,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:43,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 485 transitions, 8559 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:43,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:43,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:43,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:44,665 INFO L124 PetriNetUnfolderBase]: 2630/4395 cut-off events. [2024-06-03 20:41:44,666 INFO L125 PetriNetUnfolderBase]: For 260899/260901 co-relation queries the response was YES. [2024-06-03 20:41:44,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36371 conditions, 4395 events. 2630/4395 cut-off events. For 260899/260901 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 27540 event pairs, 523 based on Foata normal form. 3/4393 useless extension candidates. Maximal degree in co-relation 36225. Up to 3550 conditions per place. [2024-06-03 20:41:44,727 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 296 selfloop transitions, 200 changer transitions 0/502 dead transitions. [2024-06-03 20:41:44,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 502 transitions, 9605 flow [2024-06-03 20:41:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 20:41:44,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932249322493225 [2024-06-03 20:41:44,728 INFO L175 Difference]: Start difference. First operand has 318 places, 485 transitions, 8559 flow. Second operand 9 states and 182 transitions. [2024-06-03 20:41:44,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 502 transitions, 9605 flow [2024-06-03 20:41:45,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 502 transitions, 9263 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-03 20:41:45,430 INFO L231 Difference]: Finished difference. Result has 317 places, 485 transitions, 8629 flow [2024-06-03 20:41:45,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8629, PETRI_PLACES=317, PETRI_TRANSITIONS=485} [2024-06-03 20:41:45,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-03 20:41:45,430 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 485 transitions, 8629 flow [2024-06-03 20:41:45,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:45,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:45,431 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] [2024-06-03 20:41:45,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:41:45,431 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:45,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash -995829527, now seen corresponding path program 4 times [2024-06-03 20:41:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:45,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823834459] [2024-06-03 20:41:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:45,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:45,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:45,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823834459] [2024-06-03 20:41:45,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823834459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:45,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:45,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:45,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055359881] [2024-06-03 20:41:45,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:45,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:45,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:45,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:45,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:45,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 485 transitions, 8629 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:45,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:45,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:45,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:46,621 INFO L124 PetriNetUnfolderBase]: 2643/4411 cut-off events. [2024-06-03 20:41:46,621 INFO L125 PetriNetUnfolderBase]: For 267407/267409 co-relation queries the response was YES. [2024-06-03 20:41:46,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36812 conditions, 4411 events. 2643/4411 cut-off events. For 267407/267409 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27688 event pairs, 490 based on Foata normal form. 3/4413 useless extension candidates. Maximal degree in co-relation 36665. Up to 3821 conditions per place. [2024-06-03 20:41:46,682 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 418 selfloop transitions, 100 changer transitions 0/524 dead transitions. [2024-06-03 20:41:46,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 524 transitions, 10062 flow [2024-06-03 20:41:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:41:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:41:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-03 20:41:46,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-03 20:41:46,684 INFO L175 Difference]: Start difference. First operand has 317 places, 485 transitions, 8629 flow. Second operand 12 states and 243 transitions. [2024-06-03 20:41:46,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 524 transitions, 10062 flow [2024-06-03 20:41:47,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 524 transitions, 9496 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 20:41:47,316 INFO L231 Difference]: Finished difference. Result has 322 places, 494 transitions, 8491 flow [2024-06-03 20:41:47,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8072, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8491, PETRI_PLACES=322, PETRI_TRANSITIONS=494} [2024-06-03 20:41:47,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-03 20:41:47,317 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 494 transitions, 8491 flow [2024-06-03 20:41:47,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:47,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:47,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:47,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:41:47,318 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:47,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:47,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1417979981, now seen corresponding path program 5 times [2024-06-03 20:41:47,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:47,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188872821] [2024-06-03 20:41:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:47,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:47,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188872821] [2024-06-03 20:41:47,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188872821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:47,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:47,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:47,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135412087] [2024-06-03 20:41:47,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:47,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:47,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:47,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:47,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 494 transitions, 8491 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:47,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:47,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:47,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:48,495 INFO L124 PetriNetUnfolderBase]: 2648/4418 cut-off events. [2024-06-03 20:41:48,495 INFO L125 PetriNetUnfolderBase]: For 272588/272590 co-relation queries the response was YES. [2024-06-03 20:41:48,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36682 conditions, 4418 events. 2648/4418 cut-off events. For 272588/272590 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 27730 event pairs, 490 based on Foata normal form. 3/4420 useless extension candidates. Maximal degree in co-relation 36532. Up to 3825 conditions per place. [2024-06-03 20:41:48,552 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 419 selfloop transitions, 106 changer transitions 0/531 dead transitions. [2024-06-03 20:41:48,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 531 transitions, 9999 flow [2024-06-03 20:41:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:41:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:41:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-03 20:41:48,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-03 20:41:48,553 INFO L175 Difference]: Start difference. First operand has 322 places, 494 transitions, 8491 flow. Second operand 12 states and 247 transitions. [2024-06-03 20:41:48,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 531 transitions, 9999 flow [2024-06-03 20:41:49,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 531 transitions, 9820 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:41:49,269 INFO L231 Difference]: Finished difference. Result has 327 places, 497 transitions, 8598 flow [2024-06-03 20:41:49,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8316, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8598, PETRI_PLACES=327, PETRI_TRANSITIONS=497} [2024-06-03 20:41:49,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-03 20:41:49,270 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 497 transitions, 8598 flow [2024-06-03 20:41:49,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:49,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:49,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:49,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:41:49,270 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:49,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash 209167307, now seen corresponding path program 4 times [2024-06-03 20:41:49,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:49,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304490123] [2024-06-03 20:41:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:49,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:49,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:49,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304490123] [2024-06-03 20:41:49,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304490123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:49,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:49,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:49,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468031281] [2024-06-03 20:41:49,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:49,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:49,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:49,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:49,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:49,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:41:49,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 497 transitions, 8598 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 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) [2024-06-03 20:41:49,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:49,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:41:49,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:50,450 INFO L124 PetriNetUnfolderBase]: 2658/4444 cut-off events. [2024-06-03 20:41:50,450 INFO L125 PetriNetUnfolderBase]: For 282479/282481 co-relation queries the response was YES. [2024-06-03 20:41:50,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37037 conditions, 4444 events. 2658/4444 cut-off events. For 282479/282481 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 28006 event pairs, 496 based on Foata normal form. 4/4447 useless extension candidates. Maximal degree in co-relation 36886. Up to 3872 conditions per place. [2024-06-03 20:41:50,509 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 432 selfloop transitions, 95 changer transitions 0/533 dead transitions. [2024-06-03 20:41:50,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 533 transitions, 10045 flow [2024-06-03 20:41:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:41:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:41:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 20:41:50,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:41:50,510 INFO L175 Difference]: Start difference. First operand has 327 places, 497 transitions, 8598 flow. Second operand 11 states and 231 transitions. [2024-06-03 20:41:50,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 533 transitions, 10045 flow [2024-06-03 20:41:51,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 533 transitions, 9819 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-03 20:41:51,385 INFO L231 Difference]: Finished difference. Result has 328 places, 501 transitions, 8706 flow [2024-06-03 20:41:51,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8375, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8706, PETRI_PLACES=328, PETRI_TRANSITIONS=501} [2024-06-03 20:41:51,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-03 20:41:51,385 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 501 transitions, 8706 flow [2024-06-03 20:41:51,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 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) [2024-06-03 20:41:51,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:51,386 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] [2024-06-03 20:41:51,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:41:51,386 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:51,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:51,386 INFO L85 PathProgramCache]: Analyzing trace with hash 753510217, now seen corresponding path program 5 times [2024-06-03 20:41:51,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:51,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639638633] [2024-06-03 20:41:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:51,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:51,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639638633] [2024-06-03 20:41:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639638633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:51,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:51,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:51,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462842208] [2024-06-03 20:41:51,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:51,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:51,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:51,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:51,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-03 20:41:51,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 501 transitions, 8706 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:51,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:51,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-03 20:41:51,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:52,686 INFO L124 PetriNetUnfolderBase]: 2649/4431 cut-off events. [2024-06-03 20:41:52,687 INFO L125 PetriNetUnfolderBase]: For 284068/284070 co-relation queries the response was YES. [2024-06-03 20:41:52,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36752 conditions, 4431 events. 2649/4431 cut-off events. For 284068/284070 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27889 event pairs, 496 based on Foata normal form. 5/4435 useless extension candidates. Maximal degree in co-relation 36601. Up to 3863 conditions per place. [2024-06-03 20:41:52,747 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 429 selfloop transitions, 94 changer transitions 0/529 dead transitions. [2024-06-03 20:41:52,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 529 transitions, 9868 flow [2024-06-03 20:41:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:41:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:41:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-03 20:41:52,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47671840354767187 [2024-06-03 20:41:52,748 INFO L175 Difference]: Start difference. First operand has 328 places, 501 transitions, 8706 flow. Second operand 11 states and 215 transitions. [2024-06-03 20:41:52,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 529 transitions, 9868 flow [2024-06-03 20:41:53,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 529 transitions, 9644 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-03 20:41:53,579 INFO L231 Difference]: Finished difference. Result has 329 places, 501 transitions, 8687 flow [2024-06-03 20:41:53,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8482, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8687, PETRI_PLACES=329, PETRI_TRANSITIONS=501} [2024-06-03 20:41:53,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-03 20:41:53,580 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 501 transitions, 8687 flow [2024-06-03 20:41:53,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:53,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:53,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:53,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:41:53,580 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:53,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1417991141, now seen corresponding path program 6 times [2024-06-03 20:41:53,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:53,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690926525] [2024-06-03 20:41:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:53,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:53,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690926525] [2024-06-03 20:41:53,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690926525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:53,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:53,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:53,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072442264] [2024-06-03 20:41:53,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:53,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:53,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:53,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:53,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:53,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:53,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 501 transitions, 8687 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:53,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:53,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:53,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:54,732 INFO L124 PetriNetUnfolderBase]: 2675/4473 cut-off events. [2024-06-03 20:41:54,732 INFO L125 PetriNetUnfolderBase]: For 287147/287149 co-relation queries the response was YES. [2024-06-03 20:41:54,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37227 conditions, 4473 events. 2675/4473 cut-off events. For 287147/287149 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28247 event pairs, 525 based on Foata normal form. 2/4470 useless extension candidates. Maximal degree in co-relation 37076. Up to 3655 conditions per place. [2024-06-03 20:41:54,793 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 357 selfloop transitions, 172 changer transitions 0/535 dead transitions. [2024-06-03 20:41:54,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 535 transitions, 10479 flow [2024-06-03 20:41:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 20:41:54,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-03 20:41:54,794 INFO L175 Difference]: Start difference. First operand has 329 places, 501 transitions, 8687 flow. Second operand 9 states and 196 transitions. [2024-06-03 20:41:54,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 535 transitions, 10479 flow [2024-06-03 20:41:55,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 535 transitions, 10234 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-03 20:41:55,589 INFO L231 Difference]: Finished difference. Result has 328 places, 515 transitions, 9175 flow [2024-06-03 20:41:55,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8448, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9175, PETRI_PLACES=328, PETRI_TRANSITIONS=515} [2024-06-03 20:41:55,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-03 20:41:55,589 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 515 transitions, 9175 flow [2024-06-03 20:41:55,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:55,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:55,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:55,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:41:55,590 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:55,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:55,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1806215187, now seen corresponding path program 4 times [2024-06-03 20:41:55,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:55,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221507137] [2024-06-03 20:41:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:55,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:55,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:55,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221507137] [2024-06-03 20:41:55,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221507137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:55,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:55,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:55,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172094711] [2024-06-03 20:41:55,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:55,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:55,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:55,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:55,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 515 transitions, 9175 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:55,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:55,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:55,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:56,688 INFO L124 PetriNetUnfolderBase]: 2695/4507 cut-off events. [2024-06-03 20:41:56,688 INFO L125 PetriNetUnfolderBase]: For 300911/300913 co-relation queries the response was YES. [2024-06-03 20:41:56,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38331 conditions, 4507 events. 2695/4507 cut-off events. For 300911/300913 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28401 event pairs, 356 based on Foata normal form. 6/4508 useless extension candidates. Maximal degree in co-relation 38179. Up to 3601 conditions per place. [2024-06-03 20:41:56,748 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 465 selfloop transitions, 68 changer transitions 0/539 dead transitions. [2024-06-03 20:41:56,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 539 transitions, 10519 flow [2024-06-03 20:41:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-03 20:41:56,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-03 20:41:56,750 INFO L175 Difference]: Start difference. First operand has 328 places, 515 transitions, 9175 flow. Second operand 7 states and 158 transitions. [2024-06-03 20:41:56,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 539 transitions, 10519 flow [2024-06-03 20:41:57,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 539 transitions, 10385 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 20:41:57,527 INFO L231 Difference]: Finished difference. Result has 332 places, 516 transitions, 9211 flow [2024-06-03 20:41:57,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9041, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9211, PETRI_PLACES=332, PETRI_TRANSITIONS=516} [2024-06-03 20:41:57,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-03 20:41:57,528 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 516 transitions, 9211 flow [2024-06-03 20:41:57,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:57,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:57,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:57,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:41:57,528 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:57,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash 812082059, now seen corresponding path program 5 times [2024-06-03 20:41:57,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:57,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376541173] [2024-06-03 20:41:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:57,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:57,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:57,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376541173] [2024-06-03 20:41:57,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376541173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:57,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:57,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:57,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141236532] [2024-06-03 20:41:57,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:57,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:57,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:57,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:57,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:57,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 516 transitions, 9211 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:57,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:57,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:57,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:58,629 INFO L124 PetriNetUnfolderBase]: 2682/4488 cut-off events. [2024-06-03 20:41:58,629 INFO L125 PetriNetUnfolderBase]: For 295645/295647 co-relation queries the response was YES. [2024-06-03 20:41:58,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38195 conditions, 4488 events. 2682/4488 cut-off events. For 295645/295647 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28321 event pairs, 349 based on Foata normal form. 6/4489 useless extension candidates. Maximal degree in co-relation 38042. Up to 3595 conditions per place. [2024-06-03 20:41:58,689 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 464 selfloop transitions, 66 changer transitions 0/536 dead transitions. [2024-06-03 20:41:58,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 536 transitions, 10387 flow [2024-06-03 20:41:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:41:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:41:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-03 20:41:58,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 20:41:58,691 INFO L175 Difference]: Start difference. First operand has 332 places, 516 transitions, 9211 flow. Second operand 6 states and 140 transitions. [2024-06-03 20:41:58,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 536 transitions, 10387 flow [2024-06-03 20:41:59,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 536 transitions, 10217 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:59,516 INFO L231 Difference]: Finished difference. Result has 332 places, 516 transitions, 9187 flow [2024-06-03 20:41:59,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9041, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9187, PETRI_PLACES=332, PETRI_TRANSITIONS=516} [2024-06-03 20:41:59,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-03 20:41:59,517 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 516 transitions, 9187 flow [2024-06-03 20:41:59,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:59,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:59,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:59,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:41:59,518 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:59,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1358392883, now seen corresponding path program 7 times [2024-06-03 20:41:59,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:59,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862774282] [2024-06-03 20:41:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:59,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:59,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:59,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862774282] [2024-06-03 20:41:59,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862774282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:59,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:59,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:41:59,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631821971] [2024-06-03 20:41:59,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:59,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:41:59,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:41:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:41:59,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:59,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 516 transitions, 9187 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:59,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:59,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:59,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:00,713 INFO L124 PetriNetUnfolderBase]: 2703/4521 cut-off events. [2024-06-03 20:42:00,714 INFO L125 PetriNetUnfolderBase]: For 282273/282275 co-relation queries the response was YES. [2024-06-03 20:42:00,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38285 conditions, 4521 events. 2703/4521 cut-off events. For 282273/282275 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28629 event pairs, 523 based on Foata normal form. 1/4517 useless extension candidates. Maximal degree in co-relation 38134. Up to 3332 conditions per place. [2024-06-03 20:42:00,773 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 355 changer transitions 0/550 dead transitions. [2024-06-03 20:42:00,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 550 transitions, 10819 flow [2024-06-03 20:42:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:42:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:42:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:42:00,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:42:00,775 INFO L175 Difference]: Start difference. First operand has 332 places, 516 transitions, 9187 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:42:00,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 550 transitions, 10819 flow [2024-06-03 20:42:01,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 550 transitions, 10671 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:01,462 INFO L231 Difference]: Finished difference. Result has 338 places, 525 transitions, 10113 flow [2024-06-03 20:42:01,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9047, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10113, PETRI_PLACES=338, PETRI_TRANSITIONS=525} [2024-06-03 20:42:01,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-03 20:42:01,462 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 525 transitions, 10113 flow [2024-06-03 20:42:01,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:01,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:01,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:01,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:42:01,463 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:01,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:01,463 INFO L85 PathProgramCache]: Analyzing trace with hash -327887759, now seen corresponding path program 6 times [2024-06-03 20:42:01,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:01,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396621946] [2024-06-03 20:42:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:01,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:01,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:01,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396621946] [2024-06-03 20:42:01,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396621946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:01,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:01,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:01,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895246428] [2024-06-03 20:42:01,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:01,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:01,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:01,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 525 transitions, 10113 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:01,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:01,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:01,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:02,713 INFO L124 PetriNetUnfolderBase]: 2713/4537 cut-off events. [2024-06-03 20:42:02,713 INFO L125 PetriNetUnfolderBase]: For 283829/283831 co-relation queries the response was YES. [2024-06-03 20:42:02,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39561 conditions, 4537 events. 2713/4537 cut-off events. For 283829/283831 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 28675 event pairs, 523 based on Foata normal form. 2/4534 useless extension candidates. Maximal degree in co-relation 39410. Up to 3689 conditions per place. [2024-06-03 20:42:02,769 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 344 selfloop transitions, 198 changer transitions 0/548 dead transitions. [2024-06-03 20:42:02,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 548 transitions, 11466 flow [2024-06-03 20:42:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-03 20:42:02,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-03 20:42:02,770 INFO L175 Difference]: Start difference. First operand has 338 places, 525 transitions, 10113 flow. Second operand 9 states and 201 transitions. [2024-06-03 20:42:02,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 548 transitions, 11466 flow [2024-06-03 20:42:03,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 548 transitions, 10988 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:03,470 INFO L231 Difference]: Finished difference. Result has 340 places, 529 transitions, 10131 flow [2024-06-03 20:42:03,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9637, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10131, PETRI_PLACES=340, PETRI_TRANSITIONS=529} [2024-06-03 20:42:03,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-03 20:42:03,471 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 529 transitions, 10131 flow [2024-06-03 20:42:03,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:03,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:03,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:03,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:42:03,472 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:03,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1174955219, now seen corresponding path program 8 times [2024-06-03 20:42:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:03,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247153882] [2024-06-03 20:42:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:03,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:03,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247153882] [2024-06-03 20:42:03,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247153882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:03,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:03,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:42:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840063277] [2024-06-03 20:42:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:03,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:42:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:42:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:42:03,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:03,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 529 transitions, 10131 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:03,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:03,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:03,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:04,653 INFO L124 PetriNetUnfolderBase]: 2726/4565 cut-off events. [2024-06-03 20:42:04,653 INFO L125 PetriNetUnfolderBase]: For 278879/278881 co-relation queries the response was YES. [2024-06-03 20:42:04,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39531 conditions, 4565 events. 2726/4565 cut-off events. For 278879/278881 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28981 event pairs, 525 based on Foata normal form. 1/4561 useless extension candidates. Maximal degree in co-relation 39379. Up to 3352 conditions per place. [2024-06-03 20:42:04,714 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 195 selfloop transitions, 358 changer transitions 0/559 dead transitions. [2024-06-03 20:42:04,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 559 transitions, 11809 flow [2024-06-03 20:42:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:42:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:42:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-03 20:42:04,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50093808630394 [2024-06-03 20:42:04,716 INFO L175 Difference]: Start difference. First operand has 340 places, 529 transitions, 10131 flow. Second operand 13 states and 267 transitions. [2024-06-03 20:42:04,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 559 transitions, 11809 flow [2024-06-03 20:42:05,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 559 transitions, 11498 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:05,505 INFO L231 Difference]: Finished difference. Result has 347 places, 535 transitions, 10667 flow [2024-06-03 20:42:05,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9826, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10667, PETRI_PLACES=347, PETRI_TRANSITIONS=535} [2024-06-03 20:42:05,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 20:42:05,506 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 535 transitions, 10667 flow [2024-06-03 20:42:05,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:05,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:05,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:05,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:42:05,507 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:05,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1349132687, now seen corresponding path program 7 times [2024-06-03 20:42:05,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:05,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774273107] [2024-06-03 20:42:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:05,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:05,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:05,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774273107] [2024-06-03 20:42:05,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774273107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:05,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:05,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:42:05,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299631818] [2024-06-03 20:42:05,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:05,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:42:05,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:05,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:42:05,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:42:05,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:05,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 535 transitions, 10667 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:05,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:05,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:05,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:06,796 INFO L124 PetriNetUnfolderBase]: 2736/4577 cut-off events. [2024-06-03 20:42:06,796 INFO L125 PetriNetUnfolderBase]: For 283843/283845 co-relation queries the response was YES. [2024-06-03 20:42:06,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40132 conditions, 4577 events. 2736/4577 cut-off events. For 283843/283845 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29015 event pairs, 523 based on Foata normal form. 2/4574 useless extension candidates. Maximal degree in co-relation 39979. Up to 3719 conditions per place. [2024-06-03 20:42:06,858 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 349 selfloop transitions, 207 changer transitions 0/562 dead transitions. [2024-06-03 20:42:06,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 562 transitions, 12196 flow [2024-06-03 20:42:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:42:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:42:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-03 20:42:06,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264227642276422 [2024-06-03 20:42:06,859 INFO L175 Difference]: Start difference. First operand has 347 places, 535 transitions, 10667 flow. Second operand 12 states and 259 transitions. [2024-06-03 20:42:06,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 562 transitions, 12196 flow [2024-06-03 20:42:07,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 562 transitions, 11484 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-03 20:42:07,738 INFO L231 Difference]: Finished difference. Result has 348 places, 539 transitions, 10481 flow [2024-06-03 20:42:07,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9965, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10481, PETRI_PLACES=348, PETRI_TRANSITIONS=539} [2024-06-03 20:42:07,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-03 20:42:07,738 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 539 transitions, 10481 flow [2024-06-03 20:42:07,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:07,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:07,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:07,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:42:07,739 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:07,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:07,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1349127107, now seen corresponding path program 8 times [2024-06-03 20:42:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:07,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076265225] [2024-06-03 20:42:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:07,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:07,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:07,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076265225] [2024-06-03 20:42:08,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076265225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:08,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:08,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:42:08,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29219643] [2024-06-03 20:42:08,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:08,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:42:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:42:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:42:08,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:08,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 539 transitions, 10481 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:08,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:08,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:08,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:08,959 INFO L124 PetriNetUnfolderBase]: 2730/4575 cut-off events. [2024-06-03 20:42:08,959 INFO L125 PetriNetUnfolderBase]: For 277919/277921 co-relation queries the response was YES. [2024-06-03 20:42:09,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39564 conditions, 4575 events. 2730/4575 cut-off events. For 277919/277921 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 29090 event pairs, 525 based on Foata normal form. 2/4572 useless extension candidates. Maximal degree in co-relation 39412. Up to 3713 conditions per place. [2024-06-03 20:42:09,022 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 207 changer transitions 0/561 dead transitions. [2024-06-03 20:42:09,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 561 transitions, 11785 flow [2024-06-03 20:42:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:42:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:42:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-03 20:42:09,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:42:09,024 INFO L175 Difference]: Start difference. First operand has 348 places, 539 transitions, 10481 flow. Second operand 12 states and 258 transitions. [2024-06-03 20:42:09,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 561 transitions, 11785 flow [2024-06-03 20:42:09,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 561 transitions, 11302 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-03 20:42:09,819 INFO L231 Difference]: Finished difference. Result has 350 places, 539 transitions, 10430 flow [2024-06-03 20:42:09,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10000, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10430, PETRI_PLACES=350, PETRI_TRANSITIONS=539} [2024-06-03 20:42:09,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-03 20:42:09,819 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 539 transitions, 10430 flow [2024-06-03 20:42:09,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:09,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:09,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:09,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:42:09,820 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:09,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1349127293, now seen corresponding path program 9 times [2024-06-03 20:42:09,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:09,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191035546] [2024-06-03 20:42:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:09,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:10,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:10,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191035546] [2024-06-03 20:42:10,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191035546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:10,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:10,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:42:10,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033495707] [2024-06-03 20:42:10,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:10,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:42:10,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:10,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:42:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:42:10,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:10,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 539 transitions, 10430 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:10,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:10,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:10,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:10,969 INFO L124 PetriNetUnfolderBase]: 2727/4565 cut-off events. [2024-06-03 20:42:10,969 INFO L125 PetriNetUnfolderBase]: For 273423/273425 co-relation queries the response was YES. [2024-06-03 20:42:11,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39395 conditions, 4565 events. 2727/4565 cut-off events. For 273423/273425 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28960 event pairs, 523 based on Foata normal form. 1/4561 useless extension candidates. Maximal degree in co-relation 39243. Up to 3355 conditions per place. [2024-06-03 20:42:11,036 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 357 changer transitions 0/560 dead transitions. [2024-06-03 20:42:11,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 560 transitions, 11860 flow [2024-06-03 20:42:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:42:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:42:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 20:42:11,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-03 20:42:11,038 INFO L175 Difference]: Start difference. First operand has 350 places, 539 transitions, 10430 flow. Second operand 10 states and 219 transitions. [2024-06-03 20:42:11,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 560 transitions, 11860 flow [2024-06-03 20:42:11,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 560 transitions, 11465 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-03 20:42:11,814 INFO L231 Difference]: Finished difference. Result has 349 places, 539 transitions, 10763 flow [2024-06-03 20:42:11,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10039, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10763, PETRI_PLACES=349, PETRI_TRANSITIONS=539} [2024-06-03 20:42:11,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-03 20:42:11,815 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 539 transitions, 10763 flow [2024-06-03 20:42:11,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:11,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:11,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:11,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:42:11,816 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:11,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:11,816 INFO L85 PathProgramCache]: Analyzing trace with hash -236873715, now seen corresponding path program 10 times [2024-06-03 20:42:11,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:11,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549955884] [2024-06-03 20:42:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:12,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:12,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549955884] [2024-06-03 20:42:12,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549955884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:12,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:12,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:12,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895026967] [2024-06-03 20:42:12,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:12,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:12,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:12,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:12,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:12,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 539 transitions, 10763 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:12,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:12,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:12,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:12,989 INFO L124 PetriNetUnfolderBase]: 2724/4561 cut-off events. [2024-06-03 20:42:12,989 INFO L125 PetriNetUnfolderBase]: For 273585/273587 co-relation queries the response was YES. [2024-06-03 20:42:13,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39672 conditions, 4561 events. 2724/4561 cut-off events. For 273585/273587 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28941 event pairs, 523 based on Foata normal form. 1/4557 useless extension candidates. Maximal degree in co-relation 39520. Up to 3729 conditions per place. [2024-06-03 20:42:13,054 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 174 changer transitions 0/561 dead transitions. [2024-06-03 20:42:13,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 561 transitions, 12203 flow [2024-06-03 20:42:13,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 20:42:13,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-03 20:42:13,056 INFO L175 Difference]: Start difference. First operand has 349 places, 539 transitions, 10763 flow. Second operand 8 states and 185 transitions. [2024-06-03 20:42:13,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 561 transitions, 12203 flow [2024-06-03 20:42:13,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 561 transitions, 11447 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-03 20:42:14,007 INFO L231 Difference]: Finished difference. Result has 347 places, 539 transitions, 10369 flow [2024-06-03 20:42:14,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10011, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10369, PETRI_PLACES=347, PETRI_TRANSITIONS=539} [2024-06-03 20:42:14,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 20:42:14,008 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 539 transitions, 10369 flow [2024-06-03 20:42:14,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:14,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:14,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:14,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:42:14,008 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:14,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash -229510719, now seen corresponding path program 9 times [2024-06-03 20:42:14,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:14,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580152494] [2024-06-03 20:42:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:14,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:14,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:14,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580152494] [2024-06-03 20:42:14,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580152494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:14,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:14,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698780129] [2024-06-03 20:42:14,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:14,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:14,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:14,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 539 transitions, 10369 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:14,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:14,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:14,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:15,150 INFO L124 PetriNetUnfolderBase]: 2731/4575 cut-off events. [2024-06-03 20:42:15,150 INFO L125 PetriNetUnfolderBase]: For 274560/274562 co-relation queries the response was YES. [2024-06-03 20:42:15,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39282 conditions, 4575 events. 2731/4575 cut-off events. For 274560/274562 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29051 event pairs, 523 based on Foata normal form. 3/4573 useless extension candidates. Maximal degree in co-relation 39130. Up to 3861 conditions per place. [2024-06-03 20:42:15,220 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 421 selfloop transitions, 130 changer transitions 0/557 dead transitions. [2024-06-03 20:42:15,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 557 transitions, 11765 flow [2024-06-03 20:42:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 20:42:15,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-03 20:42:15,221 INFO L175 Difference]: Start difference. First operand has 347 places, 539 transitions, 10369 flow. Second operand 7 states and 160 transitions. [2024-06-03 20:42:15,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 557 transitions, 11765 flow [2024-06-03 20:42:16,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 557 transitions, 11421 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:16,087 INFO L231 Difference]: Finished difference. Result has 347 places, 543 transitions, 10436 flow [2024-06-03 20:42:16,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10033, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10436, PETRI_PLACES=347, PETRI_TRANSITIONS=543} [2024-06-03 20:42:16,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 20:42:16,088 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 543 transitions, 10436 flow [2024-06-03 20:42:16,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:16,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:16,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:16,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:42:16,089 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:16,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash -229510905, now seen corresponding path program 11 times [2024-06-03 20:42:16,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:16,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414572789] [2024-06-03 20:42:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:16,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:16,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:16,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414572789] [2024-06-03 20:42:16,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414572789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:16,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742917112] [2024-06-03 20:42:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:16,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:16,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:16,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:16,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:16,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:16,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 543 transitions, 10436 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:16,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:16,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:16,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:17,223 INFO L124 PetriNetUnfolderBase]: 2728/4571 cut-off events. [2024-06-03 20:42:17,223 INFO L125 PetriNetUnfolderBase]: For 267573/267575 co-relation queries the response was YES. [2024-06-03 20:42:17,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39083 conditions, 4571 events. 2728/4571 cut-off events. For 267573/267575 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29067 event pairs, 523 based on Foata normal form. 1/4567 useless extension candidates. Maximal degree in co-relation 38931. Up to 3734 conditions per place. [2024-06-03 20:42:17,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 388 selfloop transitions, 164 changer transitions 0/558 dead transitions. [2024-06-03 20:42:17,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 558 transitions, 11714 flow [2024-06-03 20:42:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 20:42:17,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 20:42:17,289 INFO L175 Difference]: Start difference. First operand has 347 places, 543 transitions, 10436 flow. Second operand 8 states and 177 transitions. [2024-06-03 20:42:17,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 558 transitions, 11714 flow [2024-06-03 20:42:18,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 558 transitions, 11412 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:18,185 INFO L231 Difference]: Finished difference. Result has 349 places, 543 transitions, 10474 flow [2024-06-03 20:42:18,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10136, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10474, PETRI_PLACES=349, PETRI_TRANSITIONS=543} [2024-06-03 20:42:18,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-03 20:42:18,186 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 543 transitions, 10474 flow [2024-06-03 20:42:18,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:18,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:18,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:18,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:42:18,187 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:18,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 206422131, now seen corresponding path program 10 times [2024-06-03 20:42:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547829231] [2024-06-03 20:42:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:18,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:18,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547829231] [2024-06-03 20:42:18,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547829231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:18,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:18,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:18,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943771115] [2024-06-03 20:42:18,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:18,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:18,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:18,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:18,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:18,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 543 transitions, 10474 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:18,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:18,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:18,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:19,269 INFO L124 PetriNetUnfolderBase]: 2722/4574 cut-off events. [2024-06-03 20:42:19,270 INFO L125 PetriNetUnfolderBase]: For 265428/265430 co-relation queries the response was YES. [2024-06-03 20:42:19,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38912 conditions, 4574 events. 2722/4574 cut-off events. For 265428/265430 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 29197 event pairs, 525 based on Foata normal form. 2/4571 useless extension candidates. Maximal degree in co-relation 38760. Up to 3851 conditions per place. [2024-06-03 20:42:19,334 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 420 selfloop transitions, 133 changer transitions 0/559 dead transitions. [2024-06-03 20:42:19,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 559 transitions, 11632 flow [2024-06-03 20:42:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:42:19,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:42:19,335 INFO L175 Difference]: Start difference. First operand has 349 places, 543 transitions, 10474 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:42:19,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 559 transitions, 11632 flow [2024-06-03 20:42:20,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 559 transitions, 11421 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:20,025 INFO L231 Difference]: Finished difference. Result has 351 places, 543 transitions, 10545 flow [2024-06-03 20:42:20,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10263, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10545, PETRI_PLACES=351, PETRI_TRANSITIONS=543} [2024-06-03 20:42:20,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-03 20:42:20,026 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 543 transitions, 10545 flow [2024-06-03 20:42:20,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:20,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:20,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:20,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:42:20,026 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:20,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash 281398035, now seen corresponding path program 11 times [2024-06-03 20:42:20,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:20,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370663885] [2024-06-03 20:42:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:20,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:20,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:20,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370663885] [2024-06-03 20:42:20,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370663885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:20,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:20,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:20,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095835573] [2024-06-03 20:42:20,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:20,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:20,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:20,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:20,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:20,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 543 transitions, 10545 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:20,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:20,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:20,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:21,214 INFO L124 PetriNetUnfolderBase]: 2727/4576 cut-off events. [2024-06-03 20:42:21,214 INFO L125 PetriNetUnfolderBase]: For 264778/264780 co-relation queries the response was YES. [2024-06-03 20:42:21,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39007 conditions, 4576 events. 2727/4576 cut-off events. For 264778/264780 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29193 event pairs, 533 based on Foata normal form. 1/4572 useless extension candidates. Maximal degree in co-relation 38855. Up to 3644 conditions per place. [2024-06-03 20:42:21,292 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 225 changer transitions 0/564 dead transitions. [2024-06-03 20:42:21,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 564 transitions, 11908 flow [2024-06-03 20:42:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:42:21,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 20:42:21,294 INFO L175 Difference]: Start difference. First operand has 351 places, 543 transitions, 10545 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:42:21,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 564 transitions, 11908 flow [2024-06-03 20:42:22,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 564 transitions, 11536 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:42:22,427 INFO L231 Difference]: Finished difference. Result has 351 places, 546 transitions, 10692 flow [2024-06-03 20:42:22,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10175, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10692, PETRI_PLACES=351, PETRI_TRANSITIONS=546} [2024-06-03 20:42:22,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-03 20:42:22,428 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 546 transitions, 10692 flow [2024-06-03 20:42:22,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:22,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:22,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:22,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:42:22,428 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:22,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:22,429 INFO L85 PathProgramCache]: Analyzing trace with hash 117564751, now seen corresponding path program 12 times [2024-06-03 20:42:22,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:22,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719562249] [2024-06-03 20:42:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:22,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:22,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:22,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719562249] [2024-06-03 20:42:22,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719562249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:22,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:22,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:42:22,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736470424] [2024-06-03 20:42:22,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:22,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:42:22,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:42:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:42:22,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:22,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 546 transitions, 10692 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:22,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:22,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:22,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:23,599 INFO L124 PetriNetUnfolderBase]: 2740/4595 cut-off events. [2024-06-03 20:42:23,599 INFO L125 PetriNetUnfolderBase]: For 267255/267257 co-relation queries the response was YES. [2024-06-03 20:42:23,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39455 conditions, 4595 events. 2740/4595 cut-off events. For 267255/267257 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29270 event pairs, 531 based on Foata normal form. 1/4591 useless extension candidates. Maximal degree in co-relation 39303. Up to 3659 conditions per place. [2024-06-03 20:42:23,663 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 334 selfloop transitions, 235 changer transitions 0/575 dead transitions. [2024-06-03 20:42:23,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 575 transitions, 12420 flow [2024-06-03 20:42:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:42:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:42:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-03 20:42:23,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-03 20:42:23,664 INFO L175 Difference]: Start difference. First operand has 351 places, 546 transitions, 10692 flow. Second operand 11 states and 241 transitions. [2024-06-03 20:42:23,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 575 transitions, 12420 flow [2024-06-03 20:42:24,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 575 transitions, 11899 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:24,439 INFO L231 Difference]: Finished difference. Result has 356 places, 552 transitions, 10781 flow [2024-06-03 20:42:24,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10183, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10781, PETRI_PLACES=356, PETRI_TRANSITIONS=552} [2024-06-03 20:42:24,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-03 20:42:24,439 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 552 transitions, 10781 flow [2024-06-03 20:42:24,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:24,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:24,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:24,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:42:24,440 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:24,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash -439542991, now seen corresponding path program 13 times [2024-06-03 20:42:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:24,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393506433] [2024-06-03 20:42:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:24,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:24,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393506433] [2024-06-03 20:42:24,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393506433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:24,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:24,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:42:24,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464893906] [2024-06-03 20:42:24,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:24,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:42:24,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:24,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:42:24,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:42:24,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:24,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 552 transitions, 10781 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:24,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:24,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:24,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:25,592 INFO L124 PetriNetUnfolderBase]: 2737/4593 cut-off events. [2024-06-03 20:42:25,593 INFO L125 PetriNetUnfolderBase]: For 271180/271182 co-relation queries the response was YES. [2024-06-03 20:42:25,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39424 conditions, 4593 events. 2737/4593 cut-off events. For 271180/271182 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29308 event pairs, 531 based on Foata normal form. 1/4589 useless extension candidates. Maximal degree in co-relation 39271. Up to 3656 conditions per place. [2024-06-03 20:42:25,655 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 231 changer transitions 0/572 dead transitions. [2024-06-03 20:42:25,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 572 transitions, 12237 flow [2024-06-03 20:42:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-03 20:42:25,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 20:42:25,656 INFO L175 Difference]: Start difference. First operand has 356 places, 552 transitions, 10781 flow. Second operand 9 states and 204 transitions. [2024-06-03 20:42:25,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 572 transitions, 12237 flow [2024-06-03 20:42:26,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 572 transitions, 11425 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-03 20:42:26,519 INFO L231 Difference]: Finished difference. Result has 355 places, 552 transitions, 10437 flow [2024-06-03 20:42:26,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9969, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10437, PETRI_PLACES=355, PETRI_TRANSITIONS=552} [2024-06-03 20:42:26,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-03 20:42:26,519 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 552 transitions, 10437 flow [2024-06-03 20:42:26,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:26,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:26,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:26,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:42:26,520 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:26,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash -434417947, now seen corresponding path program 12 times [2024-06-03 20:42:26,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:26,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248190176] [2024-06-03 20:42:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:26,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:26,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:26,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248190176] [2024-06-03 20:42:26,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248190176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:26,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:26,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:42:26,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794821241] [2024-06-03 20:42:26,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:26,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:42:26,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:26,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:42:26,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:42:26,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:26,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 552 transitions, 10437 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:26,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:26,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:26,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:27,610 INFO L124 PetriNetUnfolderBase]: 2742/4600 cut-off events. [2024-06-03 20:42:27,610 INFO L125 PetriNetUnfolderBase]: For 275549/275551 co-relation queries the response was YES. [2024-06-03 20:42:27,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38939 conditions, 4600 events. 2742/4600 cut-off events. For 275549/275551 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 29311 event pairs, 531 based on Foata normal form. 1/4596 useless extension candidates. Maximal degree in co-relation 38787. Up to 3301 conditions per place. [2024-06-03 20:42:27,675 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 341 changer transitions 0/581 dead transitions. [2024-06-03 20:42:27,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 581 transitions, 12105 flow [2024-06-03 20:42:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-03 20:42:27,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-03 20:42:27,676 INFO L175 Difference]: Start difference. First operand has 355 places, 552 transitions, 10437 flow. Second operand 9 states and 200 transitions. [2024-06-03 20:42:27,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 581 transitions, 12105 flow [2024-06-03 20:42:28,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 581 transitions, 11614 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:42:28,536 INFO L231 Difference]: Finished difference. Result has 357 places, 561 transitions, 11045 flow [2024-06-03 20:42:28,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9946, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11045, PETRI_PLACES=357, PETRI_TRANSITIONS=561} [2024-06-03 20:42:28,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-03 20:42:28,537 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 561 transitions, 11045 flow [2024-06-03 20:42:28,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:28,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:28,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:28,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:42:28,538 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:28,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -434417761, now seen corresponding path program 14 times [2024-06-03 20:42:28,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:28,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837163806] [2024-06-03 20:42:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:28,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:28,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:28,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837163806] [2024-06-03 20:42:28,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837163806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:28,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:28,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:42:28,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387345378] [2024-06-03 20:42:28,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:28,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:42:28,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:42:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:42:28,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:28,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 561 transitions, 11045 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:28,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:28,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:28,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:29,715 INFO L124 PetriNetUnfolderBase]: 2739/4596 cut-off events. [2024-06-03 20:42:29,715 INFO L125 PetriNetUnfolderBase]: For 285864/285866 co-relation queries the response was YES. [2024-06-03 20:42:29,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40041 conditions, 4596 events. 2739/4596 cut-off events. For 285864/285866 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 29298 event pairs, 531 based on Foata normal form. 1/4592 useless extension candidates. Maximal degree in co-relation 39887. Up to 3660 conditions per place. [2024-06-03 20:42:29,780 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 237 changer transitions 0/583 dead transitions. [2024-06-03 20:42:29,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 583 transitions, 12399 flow [2024-06-03 20:42:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:42:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:42:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-03 20:42:29,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-03 20:42:29,782 INFO L175 Difference]: Start difference. First operand has 357 places, 561 transitions, 11045 flow. Second operand 12 states and 254 transitions. [2024-06-03 20:42:29,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 583 transitions, 12399 flow [2024-06-03 20:42:30,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 583 transitions, 12187 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:30,572 INFO L231 Difference]: Finished difference. Result has 365 places, 561 transitions, 11313 flow [2024-06-03 20:42:30,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10833, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11313, PETRI_PLACES=365, PETRI_TRANSITIONS=561} [2024-06-03 20:42:30,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-03 20:42:30,572 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 561 transitions, 11313 flow [2024-06-03 20:42:30,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:30,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:30,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:30,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:42:30,573 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:30,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:30,573 INFO L85 PathProgramCache]: Analyzing trace with hash -207743867, now seen corresponding path program 13 times [2024-06-03 20:42:30,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:30,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326915014] [2024-06-03 20:42:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:30,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:30,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:30,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326915014] [2024-06-03 20:42:30,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326915014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:30,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:30,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:30,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009541996] [2024-06-03 20:42:30,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:30,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:30,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:30,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:30,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:30,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 561 transitions, 11313 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:30,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:30,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:30,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:31,767 INFO L124 PetriNetUnfolderBase]: 2744/4609 cut-off events. [2024-06-03 20:42:31,767 INFO L125 PetriNetUnfolderBase]: For 288118/288120 co-relation queries the response was YES. [2024-06-03 20:42:31,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39934 conditions, 4609 events. 2744/4609 cut-off events. For 288118/288120 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 29450 event pairs, 522 based on Foata normal form. 1/4605 useless extension candidates. Maximal degree in co-relation 39778. Up to 3836 conditions per place. [2024-06-03 20:42:31,832 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 457 selfloop transitions, 122 changer transitions 0/585 dead transitions. [2024-06-03 20:42:31,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 585 transitions, 12744 flow [2024-06-03 20:42:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 20:42:31,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-03 20:42:31,834 INFO L175 Difference]: Start difference. First operand has 365 places, 561 transitions, 11313 flow. Second operand 8 states and 181 transitions. [2024-06-03 20:42:31,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 585 transitions, 12744 flow [2024-06-03 20:42:32,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 585 transitions, 12240 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-03 20:42:32,902 INFO L231 Difference]: Finished difference. Result has 362 places, 564 transitions, 11126 flow [2024-06-03 20:42:32,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10809, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11126, PETRI_PLACES=362, PETRI_TRANSITIONS=564} [2024-06-03 20:42:32,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-03 20:42:32,903 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 564 transitions, 11126 flow [2024-06-03 20:42:32,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:32,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:32,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:32,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:42:32,904 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:32,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1007759603, now seen corresponding path program 14 times [2024-06-03 20:42:32,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:32,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074544353] [2024-06-03 20:42:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:33,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074544353] [2024-06-03 20:42:33,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074544353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:33,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:33,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:33,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537738295] [2024-06-03 20:42:33,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:33,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:33,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:33,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:33,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 564 transitions, 11126 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:33,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:33,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:33,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:34,080 INFO L124 PetriNetUnfolderBase]: 2741/4600 cut-off events. [2024-06-03 20:42:34,081 INFO L125 PetriNetUnfolderBase]: For 291370/291372 co-relation queries the response was YES. [2024-06-03 20:42:34,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39614 conditions, 4600 events. 2741/4600 cut-off events. For 291370/291372 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 29329 event pairs, 522 based on Foata normal form. 1/4596 useless extension candidates. Maximal degree in co-relation 39457. Up to 3833 conditions per place. [2024-06-03 20:42:34,145 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 459 selfloop transitions, 124 changer transitions 0/589 dead transitions. [2024-06-03 20:42:34,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 589 transitions, 12374 flow [2024-06-03 20:42:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:42:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:42:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-03 20:42:34,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-03 20:42:34,147 INFO L175 Difference]: Start difference. First operand has 362 places, 564 transitions, 11126 flow. Second operand 10 states and 216 transitions. [2024-06-03 20:42:34,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 589 transitions, 12374 flow [2024-06-03 20:42:35,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 589 transitions, 11969 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:35,091 INFO L231 Difference]: Finished difference. Result has 367 places, 564 transitions, 10975 flow [2024-06-03 20:42:35,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10721, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10975, PETRI_PLACES=367, PETRI_TRANSITIONS=564} [2024-06-03 20:42:35,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-03 20:42:35,092 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 564 transitions, 10975 flow [2024-06-03 20:42:35,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:35,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:35,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:42:35,093 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:35,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1007753837, now seen corresponding path program 15 times [2024-06-03 20:42:35,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:35,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434247547] [2024-06-03 20:42:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:35,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:35,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:35,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434247547] [2024-06-03 20:42:35,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434247547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:35,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:35,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:35,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309116666] [2024-06-03 20:42:35,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:35,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:35,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:35,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:35,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:35,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:35,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 564 transitions, 10975 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:35,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:35,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:35,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:36,383 INFO L124 PetriNetUnfolderBase]: 2746/4616 cut-off events. [2024-06-03 20:42:36,383 INFO L125 PetriNetUnfolderBase]: For 296256/296258 co-relation queries the response was YES. [2024-06-03 20:42:36,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39538 conditions, 4616 events. 2746/4616 cut-off events. For 296256/296258 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29508 event pairs, 524 based on Foata normal form. 1/4612 useless extension candidates. Maximal degree in co-relation 39380. Up to 3862 conditions per place. [2024-06-03 20:42:36,450 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 447 selfloop transitions, 132 changer transitions 0/585 dead transitions. [2024-06-03 20:42:36,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 585 transitions, 12405 flow [2024-06-03 20:42:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:42:36,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 20:42:36,451 INFO L175 Difference]: Start difference. First operand has 367 places, 564 transitions, 10975 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:42:36,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 585 transitions, 12405 flow [2024-06-03 20:42:37,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 585 transitions, 12140 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:42:37,474 INFO L231 Difference]: Finished difference. Result has 366 places, 567 transitions, 11068 flow [2024-06-03 20:42:37,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10710, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11068, PETRI_PLACES=366, PETRI_TRANSITIONS=567} [2024-06-03 20:42:37,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-03 20:42:37,475 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 567 transitions, 11068 flow [2024-06-03 20:42:37,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:37,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:37,475 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] [2024-06-03 20:42:37,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:42:37,476 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:37,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1007748257, now seen corresponding path program 16 times [2024-06-03 20:42:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632415913] [2024-06-03 20:42:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:37,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:37,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:37,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632415913] [2024-06-03 20:42:37,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632415913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:37,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:37,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:37,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70878291] [2024-06-03 20:42:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:37,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:37,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:37,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:37,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:37,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:37,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 567 transitions, 11068 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:37,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:37,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:37,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:38,643 INFO L124 PetriNetUnfolderBase]: 2743/4612 cut-off events. [2024-06-03 20:42:38,643 INFO L125 PetriNetUnfolderBase]: For 300492/300494 co-relation queries the response was YES. [2024-06-03 20:42:38,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39570 conditions, 4612 events. 2743/4612 cut-off events. For 300492/300494 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29495 event pairs, 524 based on Foata normal form. 1/4608 useless extension candidates. Maximal degree in co-relation 39411. Up to 3859 conditions per place. [2024-06-03 20:42:38,709 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 449 selfloop transitions, 124 changer transitions 0/579 dead transitions. [2024-06-03 20:42:38,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 579 transitions, 12252 flow [2024-06-03 20:42:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 20:42:38,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:42:38,710 INFO L175 Difference]: Start difference. First operand has 366 places, 567 transitions, 11068 flow. Second operand 6 states and 141 transitions. [2024-06-03 20:42:38,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 579 transitions, 12252 flow [2024-06-03 20:42:39,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 579 transitions, 11837 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 20:42:39,742 INFO L231 Difference]: Finished difference. Result has 364 places, 567 transitions, 10924 flow [2024-06-03 20:42:39,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10653, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10924, PETRI_PLACES=364, PETRI_TRANSITIONS=567} [2024-06-03 20:42:39,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-03 20:42:39,743 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 567 transitions, 10924 flow [2024-06-03 20:42:39,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:39,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:39,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:39,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:42:39,743 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:39,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1768678017, now seen corresponding path program 17 times [2024-06-03 20:42:39,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:39,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898673320] [2024-06-03 20:42:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:39,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:39,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:39,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898673320] [2024-06-03 20:42:39,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898673320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:39,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:39,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:39,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477368402] [2024-06-03 20:42:39,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:39,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:39,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:39,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:39,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:39,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:39,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 567 transitions, 10924 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:39,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:39,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:39,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:40,944 INFO L124 PetriNetUnfolderBase]: 2745/4611 cut-off events. [2024-06-03 20:42:40,945 INFO L125 PetriNetUnfolderBase]: For 299738/299740 co-relation queries the response was YES. [2024-06-03 20:42:40,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39386 conditions, 4611 events. 2745/4611 cut-off events. For 299738/299740 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29496 event pairs, 522 based on Foata normal form. 2/4608 useless extension candidates. Maximal degree in co-relation 39227. Up to 3810 conditions per place. [2024-06-03 20:42:41,010 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 423 selfloop transitions, 157 changer transitions 0/586 dead transitions. [2024-06-03 20:42:41,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 586 transitions, 12311 flow [2024-06-03 20:42:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 20:42:41,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-03 20:42:41,012 INFO L175 Difference]: Start difference. First operand has 364 places, 567 transitions, 10924 flow. Second operand 9 states and 196 transitions. [2024-06-03 20:42:41,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 586 transitions, 12311 flow [2024-06-03 20:42:42,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 586 transitions, 12063 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:42,037 INFO L231 Difference]: Finished difference. Result has 368 places, 570 transitions, 11036 flow [2024-06-03 20:42:42,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10676, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11036, PETRI_PLACES=368, PETRI_TRANSITIONS=570} [2024-06-03 20:42:42,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-03 20:42:42,038 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 570 transitions, 11036 flow [2024-06-03 20:42:42,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:42,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:42,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:42,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:42:42,038 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:42,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:42,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1597975401, now seen corresponding path program 15 times [2024-06-03 20:42:42,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:42,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677702359] [2024-06-03 20:42:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:42,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:42,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677702359] [2024-06-03 20:42:42,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677702359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:42,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:42,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:42,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497136336] [2024-06-03 20:42:42,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:42,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:42,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:42,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:42,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:42,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 570 transitions, 11036 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:42,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:42,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:42,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:43,168 INFO L124 PetriNetUnfolderBase]: 2766/4646 cut-off events. [2024-06-03 20:42:43,169 INFO L125 PetriNetUnfolderBase]: For 309555/309557 co-relation queries the response was YES. [2024-06-03 20:42:43,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40003 conditions, 4646 events. 2766/4646 cut-off events. For 309555/309557 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 29761 event pairs, 523 based on Foata normal form. 1/4642 useless extension candidates. Maximal degree in co-relation 39843. Up to 3640 conditions per place. [2024-06-03 20:42:43,234 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 382 selfloop transitions, 209 changer transitions 0/597 dead transitions. [2024-06-03 20:42:43,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 597 transitions, 12744 flow [2024-06-03 20:42:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:42:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:42:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-03 20:42:43,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-03 20:42:43,235 INFO L175 Difference]: Start difference. First operand has 368 places, 570 transitions, 11036 flow. Second operand 10 states and 214 transitions. [2024-06-03 20:42:43,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 597 transitions, 12744 flow [2024-06-03 20:42:44,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 597 transitions, 12441 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:44,313 INFO L231 Difference]: Finished difference. Result has 374 places, 579 transitions, 11467 flow [2024-06-03 20:42:44,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10733, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11467, PETRI_PLACES=374, PETRI_TRANSITIONS=579} [2024-06-03 20:42:44,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-03 20:42:44,313 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 579 transitions, 11467 flow [2024-06-03 20:42:44,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:44,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:44,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:44,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:42:44,314 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:44,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash -994861433, now seen corresponding path program 16 times [2024-06-03 20:42:44,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:44,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321095170] [2024-06-03 20:42:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:44,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:44,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:44,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321095170] [2024-06-03 20:42:44,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321095170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:44,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:44,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:44,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997607192] [2024-06-03 20:42:44,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:44,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:44,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:44,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:44,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 579 transitions, 11467 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:44,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:44,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:44,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:45,528 INFO L124 PetriNetUnfolderBase]: 2771/4655 cut-off events. [2024-06-03 20:42:45,528 INFO L125 PetriNetUnfolderBase]: For 319772/319774 co-relation queries the response was YES. [2024-06-03 20:42:45,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40570 conditions, 4655 events. 2771/4655 cut-off events. For 319772/319774 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29779 event pairs, 531 based on Foata normal form. 1/4651 useless extension candidates. Maximal degree in co-relation 40407. Up to 3644 conditions per place. [2024-06-03 20:42:45,588 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 368 selfloop transitions, 227 changer transitions 0/601 dead transitions. [2024-06-03 20:42:45,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 601 transitions, 13088 flow [2024-06-03 20:42:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:45,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 20:42:45,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-03 20:42:45,590 INFO L175 Difference]: Start difference. First operand has 374 places, 579 transitions, 11467 flow. Second operand 8 states and 181 transitions. [2024-06-03 20:42:45,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 601 transitions, 13088 flow [2024-06-03 20:42:46,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 601 transitions, 12700 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:46,666 INFO L231 Difference]: Finished difference. Result has 376 places, 582 transitions, 11616 flow [2024-06-03 20:42:46,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11085, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11616, PETRI_PLACES=376, PETRI_TRANSITIONS=582} [2024-06-03 20:42:46,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-03 20:42:46,666 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 582 transitions, 11616 flow [2024-06-03 20:42:46,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:46,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:46,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:46,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:42:46,667 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:46,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:46,667 INFO L85 PathProgramCache]: Analyzing trace with hash -800922023, now seen corresponding path program 17 times [2024-06-03 20:42:46,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:46,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780179815] [2024-06-03 20:42:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:46,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:46,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:46,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780179815] [2024-06-03 20:42:46,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780179815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:46,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:46,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:46,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720064987] [2024-06-03 20:42:46,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:46,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:46,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:46,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:46,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:46,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:46,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 582 transitions, 11616 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:46,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:46,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:46,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:47,812 INFO L124 PetriNetUnfolderBase]: 2768/4651 cut-off events. [2024-06-03 20:42:47,812 INFO L125 PetriNetUnfolderBase]: For 323666/323668 co-relation queries the response was YES. [2024-06-03 20:42:47,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40602 conditions, 4651 events. 2768/4651 cut-off events. For 323666/323668 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29779 event pairs, 522 based on Foata normal form. 1/4647 useless extension candidates. Maximal degree in co-relation 40438. Up to 3642 conditions per place. [2024-06-03 20:42:47,879 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 216 changer transitions 0/598 dead transitions. [2024-06-03 20:42:47,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 598 transitions, 12996 flow [2024-06-03 20:42:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-03 20:42:47,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-03 20:42:47,880 INFO L175 Difference]: Start difference. First operand has 376 places, 582 transitions, 11616 flow. Second operand 9 states and 194 transitions. [2024-06-03 20:42:47,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 598 transitions, 12996 flow [2024-06-03 20:42:49,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 598 transitions, 12564 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:49,075 INFO L231 Difference]: Finished difference. Result has 380 places, 582 transitions, 11622 flow [2024-06-03 20:42:49,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11184, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11622, PETRI_PLACES=380, PETRI_TRANSITIONS=582} [2024-06-03 20:42:49,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-03 20:42:49,076 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 582 transitions, 11622 flow [2024-06-03 20:42:49,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:49,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:49,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:42:49,076 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:49,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -994624097, now seen corresponding path program 18 times [2024-06-03 20:42:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629896615] [2024-06-03 20:42:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:49,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629896615] [2024-06-03 20:42:49,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629896615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:49,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:49,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:49,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040553259] [2024-06-03 20:42:49,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:49,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:49,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:49,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:49,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:49,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 582 transitions, 11622 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:49,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:49,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:49,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:50,284 INFO L124 PetriNetUnfolderBase]: 2773/4658 cut-off events. [2024-06-03 20:42:50,284 INFO L125 PetriNetUnfolderBase]: For 332924/332926 co-relation queries the response was YES. [2024-06-03 20:42:50,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40739 conditions, 4658 events. 2773/4658 cut-off events. For 332924/332926 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 29844 event pairs, 522 based on Foata normal form. 1/4654 useless extension candidates. Maximal degree in co-relation 40574. Up to 3848 conditions per place. [2024-06-03 20:42:50,345 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 165 changer transitions 0/600 dead transitions. [2024-06-03 20:42:50,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 600 transitions, 13056 flow [2024-06-03 20:42:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 20:42:50,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 20:42:50,346 INFO L175 Difference]: Start difference. First operand has 380 places, 582 transitions, 11622 flow. Second operand 8 states and 177 transitions. [2024-06-03 20:42:50,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 600 transitions, 13056 flow [2024-06-03 20:42:51,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 600 transitions, 12601 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:51,451 INFO L231 Difference]: Finished difference. Result has 381 places, 585 transitions, 11553 flow [2024-06-03 20:42:51,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11169, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11553, PETRI_PLACES=381, PETRI_TRANSITIONS=585} [2024-06-03 20:42:51,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-03 20:42:51,452 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 585 transitions, 11553 flow [2024-06-03 20:42:51,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:51,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:51,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:51,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:42:51,453 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:51,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash -199981901, now seen corresponding path program 19 times [2024-06-03 20:42:51,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:51,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792815967] [2024-06-03 20:42:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:51,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:51,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:51,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792815967] [2024-06-03 20:42:51,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792815967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:51,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:51,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:51,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805199961] [2024-06-03 20:42:51,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:51,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:51,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:51,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:51,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:51,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:51,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 585 transitions, 11553 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:51,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:51,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:51,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:52,608 INFO L124 PetriNetUnfolderBase]: 2770/4654 cut-off events. [2024-06-03 20:42:52,608 INFO L125 PetriNetUnfolderBase]: For 335529/335531 co-relation queries the response was YES. [2024-06-03 20:42:52,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40583 conditions, 4654 events. 2770/4654 cut-off events. For 335529/335531 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 29776 event pairs, 531 based on Foata normal form. 1/4650 useless extension candidates. Maximal degree in co-relation 40417. Up to 3845 conditions per place. [2024-06-03 20:42:52,675 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 431 selfloop transitions, 164 changer transitions 0/601 dead transitions. [2024-06-03 20:42:52,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 601 transitions, 12795 flow [2024-06-03 20:42:52,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:42:52,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-03 20:42:52,677 INFO L175 Difference]: Start difference. First operand has 381 places, 585 transitions, 11553 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:42:52,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 601 transitions, 12795 flow [2024-06-03 20:42:53,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 601 transitions, 12514 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:53,911 INFO L231 Difference]: Finished difference. Result has 383 places, 585 transitions, 11606 flow [2024-06-03 20:42:53,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11272, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11606, PETRI_PLACES=383, PETRI_TRANSITIONS=585} [2024-06-03 20:42:53,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-03 20:42:53,911 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 585 transitions, 11606 flow [2024-06-03 20:42:53,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:53,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:53,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:53,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:42:53,912 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:53,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:53,912 INFO L85 PathProgramCache]: Analyzing trace with hash 744438695, now seen corresponding path program 1 times [2024-06-03 20:42:53,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:53,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589375642] [2024-06-03 20:42:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:54,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589375642] [2024-06-03 20:42:54,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589375642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:54,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:54,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:54,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141679720] [2024-06-03 20:42:54,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:54,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:54,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:54,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:54,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:54,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:54,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 585 transitions, 11606 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:54,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:54,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:54,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:55,216 INFO L124 PetriNetUnfolderBase]: 2856/4810 cut-off events. [2024-06-03 20:42:55,217 INFO L125 PetriNetUnfolderBase]: For 399973/399975 co-relation queries the response was YES. [2024-06-03 20:42:55,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42298 conditions, 4810 events. 2856/4810 cut-off events. For 399973/399975 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 31117 event pairs, 977 based on Foata normal form. 6/4815 useless extension candidates. Maximal degree in co-relation 42131. Up to 4086 conditions per place. [2024-06-03 20:42:55,287 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 568 selfloop transitions, 50 changer transitions 0/624 dead transitions. [2024-06-03 20:42:55,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 624 transitions, 13247 flow [2024-06-03 20:42:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:42:55,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:42:55,288 INFO L175 Difference]: Start difference. First operand has 383 places, 585 transitions, 11606 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:42:55,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 624 transitions, 13247 flow [2024-06-03 20:42:56,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 624 transitions, 12662 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 20:42:56,662 INFO L231 Difference]: Finished difference. Result has 383 places, 591 transitions, 11231 flow [2024-06-03 20:42:56,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11021, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11231, PETRI_PLACES=383, PETRI_TRANSITIONS=591} [2024-06-03 20:42:56,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-03 20:42:56,663 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 591 transitions, 11231 flow [2024-06-03 20:42:56,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:56,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:56,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:56,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:42:56,663 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:56,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:56,663 INFO L85 PathProgramCache]: Analyzing trace with hash 281259093, now seen corresponding path program 2 times [2024-06-03 20:42:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:56,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813121196] [2024-06-03 20:42:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:56,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:56,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:56,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813121196] [2024-06-03 20:42:56,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813121196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:56,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:56,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910875649] [2024-06-03 20:42:56,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:56,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:56,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:56,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:56,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 591 transitions, 11231 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:56,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:56,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:56,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:57,924 INFO L124 PetriNetUnfolderBase]: 2922/4907 cut-off events. [2024-06-03 20:42:57,924 INFO L125 PetriNetUnfolderBase]: For 431218/431220 co-relation queries the response was YES. [2024-06-03 20:42:57,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43283 conditions, 4907 events. 2922/4907 cut-off events. For 431218/431220 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 31835 event pairs, 995 based on Foata normal form. 6/4912 useless extension candidates. Maximal degree in co-relation 43113. Up to 4300 conditions per place. [2024-06-03 20:42:57,998 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 566 selfloop transitions, 48 changer transitions 0/620 dead transitions. [2024-06-03 20:42:57,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 620 transitions, 12779 flow [2024-06-03 20:42:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 20:42:57,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 20:42:57,999 INFO L175 Difference]: Start difference. First operand has 383 places, 591 transitions, 11231 flow. Second operand 8 states and 177 transitions. [2024-06-03 20:42:57,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 620 transitions, 12779 flow [2024-06-03 20:42:59,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 620 transitions, 12700 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:59,410 INFO L231 Difference]: Finished difference. Result has 389 places, 594 transitions, 11304 flow [2024-06-03 20:42:59,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11152, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11304, PETRI_PLACES=389, PETRI_TRANSITIONS=594} [2024-06-03 20:42:59,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-03 20:42:59,411 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 594 transitions, 11304 flow [2024-06-03 20:42:59,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:59,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:59,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:59,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:42:59,412 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:59,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 833152325, now seen corresponding path program 3 times [2024-06-03 20:42:59,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:59,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163096359] [2024-06-03 20:42:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:59,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:59,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:59,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163096359] [2024-06-03 20:42:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163096359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:59,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:59,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95679029] [2024-06-03 20:42:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:59,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:59,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:59,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:59,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 594 transitions, 11304 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:59,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:59,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:59,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:00,710 INFO L124 PetriNetUnfolderBase]: 2904/4881 cut-off events. [2024-06-03 20:43:00,710 INFO L125 PetriNetUnfolderBase]: For 422083/422085 co-relation queries the response was YES. [2024-06-03 20:43:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42766 conditions, 4881 events. 2904/4881 cut-off events. For 422083/422085 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 31584 event pairs, 993 based on Foata normal form. 8/4888 useless extension candidates. Maximal degree in co-relation 42593. Up to 4322 conditions per place. [2024-06-03 20:43:00,782 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 564 selfloop transitions, 47 changer transitions 0/617 dead transitions. [2024-06-03 20:43:00,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 617 transitions, 12643 flow [2024-06-03 20:43:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 20:43:00,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-03 20:43:00,783 INFO L175 Difference]: Start difference. First operand has 389 places, 594 transitions, 11304 flow. Second operand 8 states and 173 transitions. [2024-06-03 20:43:00,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 617 transitions, 12643 flow [2024-06-03 20:43:02,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 617 transitions, 12556 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:43:02,245 INFO L231 Difference]: Finished difference. Result has 393 places, 595 transitions, 11336 flow [2024-06-03 20:43:02,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11225, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11336, PETRI_PLACES=393, PETRI_TRANSITIONS=595} [2024-06-03 20:43:02,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-03 20:43:02,246 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 595 transitions, 11336 flow [2024-06-03 20:43:02,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:02,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:02,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:02,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:43:02,247 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:02,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash 117573679, now seen corresponding path program 4 times [2024-06-03 20:43:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:02,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743104499] [2024-06-03 20:43:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:02,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:02,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743104499] [2024-06-03 20:43:02,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743104499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:02,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:02,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:02,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770819221] [2024-06-03 20:43:02,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:02,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:02,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:02,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:02,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 595 transitions, 11336 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:02,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:02,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:02,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:03,713 INFO L124 PetriNetUnfolderBase]: 2932/4930 cut-off events. [2024-06-03 20:43:03,713 INFO L125 PetriNetUnfolderBase]: For 431420/431422 co-relation queries the response was YES. [2024-06-03 20:43:03,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43123 conditions, 4930 events. 2932/4930 cut-off events. For 431420/431422 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 32088 event pairs, 997 based on Foata normal form. 8/4937 useless extension candidates. Maximal degree in co-relation 42948. Up to 4366 conditions per place. [2024-06-03 20:43:03,797 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 567 selfloop transitions, 48 changer transitions 0/621 dead transitions. [2024-06-03 20:43:03,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 621 transitions, 12688 flow [2024-06-03 20:43:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:43:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:43:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-03 20:43:03,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49667405764966743 [2024-06-03 20:43:03,799 INFO L175 Difference]: Start difference. First operand has 393 places, 595 transitions, 11336 flow. Second operand 11 states and 224 transitions. [2024-06-03 20:43:03,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 621 transitions, 12688 flow [2024-06-03 20:43:05,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 621 transitions, 12601 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:05,396 INFO L231 Difference]: Finished difference. Result has 399 places, 596 transitions, 11369 flow [2024-06-03 20:43:05,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11249, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11369, PETRI_PLACES=399, PETRI_TRANSITIONS=596} [2024-06-03 20:43:05,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-03 20:43:05,397 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 596 transitions, 11369 flow [2024-06-03 20:43:05,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:05,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:05,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:05,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:43:05,398 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:05,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:05,398 INFO L85 PathProgramCache]: Analyzing trace with hash -439534063, now seen corresponding path program 5 times [2024-06-03 20:43:05,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:05,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561639536] [2024-06-03 20:43:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:05,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:05,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:05,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561639536] [2024-06-03 20:43:05,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561639536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:05,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:05,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:05,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128728794] [2024-06-03 20:43:05,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:05,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:05,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:05,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:05,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:05,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 596 transitions, 11369 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:05,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:05,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:05,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:06,706 INFO L124 PetriNetUnfolderBase]: 2947/4954 cut-off events. [2024-06-03 20:43:06,706 INFO L125 PetriNetUnfolderBase]: For 433666/433668 co-relation queries the response was YES. [2024-06-03 20:43:06,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43282 conditions, 4954 events. 2947/4954 cut-off events. For 433666/433668 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 32249 event pairs, 1002 based on Foata normal form. 8/4961 useless extension candidates. Maximal degree in co-relation 43106. Up to 4391 conditions per place. [2024-06-03 20:43:06,785 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 567 selfloop transitions, 47 changer transitions 0/620 dead transitions. [2024-06-03 20:43:06,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 620 transitions, 12717 flow [2024-06-03 20:43:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-03 20:43:06,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-03 20:43:06,786 INFO L175 Difference]: Start difference. First operand has 399 places, 596 transitions, 11369 flow. Second operand 9 states and 192 transitions. [2024-06-03 20:43:06,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 620 transitions, 12717 flow [2024-06-03 20:43:08,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 620 transitions, 12614 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 20:43:08,337 INFO L231 Difference]: Finished difference. Result has 399 places, 597 transitions, 11386 flow [2024-06-03 20:43:08,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11266, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11386, PETRI_PLACES=399, PETRI_TRANSITIONS=597} [2024-06-03 20:43:08,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-03 20:43:08,338 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 597 transitions, 11386 flow [2024-06-03 20:43:08,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:08,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:08,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:08,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:43:08,338 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:08,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:08,339 INFO L85 PathProgramCache]: Analyzing trace with hash -439681933, now seen corresponding path program 6 times [2024-06-03 20:43:08,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:08,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663458557] [2024-06-03 20:43:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:08,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:08,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:08,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663458557] [2024-06-03 20:43:08,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663458557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:08,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:08,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:08,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283895161] [2024-06-03 20:43:08,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:08,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:08,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:08,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:08,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 597 transitions, 11386 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:08,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:08,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:08,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:09,741 INFO L124 PetriNetUnfolderBase]: 2967/4995 cut-off events. [2024-06-03 20:43:09,741 INFO L125 PetriNetUnfolderBase]: For 436077/436079 co-relation queries the response was YES. [2024-06-03 20:43:09,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43577 conditions, 4995 events. 2967/4995 cut-off events. For 436077/436079 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 32618 event pairs, 1002 based on Foata normal form. 6/5000 useless extension candidates. Maximal degree in co-relation 43400. Up to 4361 conditions per place. [2024-06-03 20:43:09,823 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 570 selfloop transitions, 50 changer transitions 0/626 dead transitions. [2024-06-03 20:43:09,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 626 transitions, 12800 flow [2024-06-03 20:43:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-03 20:43:09,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-03 20:43:09,824 INFO L175 Difference]: Start difference. First operand has 399 places, 597 transitions, 11386 flow. Second operand 9 states and 194 transitions. [2024-06-03 20:43:09,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 626 transitions, 12800 flow [2024-06-03 20:43:11,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 626 transitions, 12697 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:11,524 INFO L231 Difference]: Finished difference. Result has 402 places, 600 transitions, 11455 flow [2024-06-03 20:43:11,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11283, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11455, PETRI_PLACES=402, PETRI_TRANSITIONS=600} [2024-06-03 20:43:11,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-03 20:43:11,526 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 600 transitions, 11455 flow [2024-06-03 20:43:11,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:11,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:11,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:11,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:43:11,527 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:11,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:11,527 INFO L85 PathProgramCache]: Analyzing trace with hash -433956481, now seen corresponding path program 1 times [2024-06-03 20:43:11,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:11,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128201484] [2024-06-03 20:43:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:11,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:11,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:11,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128201484] [2024-06-03 20:43:11,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128201484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:11,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:11,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:11,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244198535] [2024-06-03 20:43:11,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:11,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:11,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:11,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:11,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:11,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:11,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 600 transitions, 11455 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:11,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:11,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:11,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:12,846 INFO L124 PetriNetUnfolderBase]: 2954/4976 cut-off events. [2024-06-03 20:43:12,846 INFO L125 PetriNetUnfolderBase]: For 424430/424432 co-relation queries the response was YES. [2024-06-03 20:43:12,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43138 conditions, 4976 events. 2954/4976 cut-off events. For 424430/424432 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 32469 event pairs, 995 based on Foata normal form. 6/4981 useless extension candidates. Maximal degree in co-relation 42959. Up to 4342 conditions per place. [2024-06-03 20:43:12,925 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 570 selfloop transitions, 52 changer transitions 0/628 dead transitions. [2024-06-03 20:43:12,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 628 transitions, 12822 flow [2024-06-03 20:43:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:43:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:43:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-03 20:43:12,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011086474501109 [2024-06-03 20:43:12,926 INFO L175 Difference]: Start difference. First operand has 402 places, 600 transitions, 11455 flow. Second operand 11 states and 226 transitions. [2024-06-03 20:43:12,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 628 transitions, 12822 flow [2024-06-03 20:43:14,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 628 transitions, 12735 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:14,577 INFO L231 Difference]: Finished difference. Result has 408 places, 600 transitions, 11476 flow [2024-06-03 20:43:14,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11368, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11476, PETRI_PLACES=408, PETRI_TRANSITIONS=600} [2024-06-03 20:43:14,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-03 20:43:14,578 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 600 transitions, 11476 flow [2024-06-03 20:43:14,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:14,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:14,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:14,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:43:14,578 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:14,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1641778129, now seen corresponding path program 7 times [2024-06-03 20:43:14,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:14,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465426734] [2024-06-03 20:43:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:14,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:14,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:14,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465426734] [2024-06-03 20:43:14,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465426734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:14,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:14,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:43:14,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130303675] [2024-06-03 20:43:14,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:14,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:43:14,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:14,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:43:14,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:43:14,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:14,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 600 transitions, 11476 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:14,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:14,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:14,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:15,932 INFO L124 PetriNetUnfolderBase]: 2982/5020 cut-off events. [2024-06-03 20:43:15,933 INFO L125 PetriNetUnfolderBase]: For 440314/440316 co-relation queries the response was YES. [2024-06-03 20:43:15,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43536 conditions, 5020 events. 2982/5020 cut-off events. For 440314/440316 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32851 event pairs, 1004 based on Foata normal form. 8/5027 useless extension candidates. Maximal degree in co-relation 43355. Up to 4469 conditions per place. [2024-06-03 20:43:16,010 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 584 selfloop transitions, 30 changer transitions 0/620 dead transitions. [2024-06-03 20:43:16,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 620 transitions, 12808 flow [2024-06-03 20:43:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 20:43:16,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:43:16,011 INFO L175 Difference]: Start difference. First operand has 408 places, 600 transitions, 11476 flow. Second operand 8 states and 168 transitions. [2024-06-03 20:43:16,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 620 transitions, 12808 flow [2024-06-03 20:43:17,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 620 transitions, 12661 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 20:43:18,006 INFO L231 Difference]: Finished difference. Result has 406 places, 601 transitions, 11413 flow [2024-06-03 20:43:18,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11330, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11413, PETRI_PLACES=406, PETRI_TRANSITIONS=601} [2024-06-03 20:43:18,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-03 20:43:18,007 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 601 transitions, 11413 flow [2024-06-03 20:43:18,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:18,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:18,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:18,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:43:18,007 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:18,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:18,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1647140509, now seen corresponding path program 8 times [2024-06-03 20:43:18,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:18,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468440189] [2024-06-03 20:43:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:18,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:18,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:18,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468440189] [2024-06-03 20:43:18,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468440189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:18,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:18,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:43:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648405884] [2024-06-03 20:43:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:18,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:43:18,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:43:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:43:18,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:18,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 601 transitions, 11413 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:18,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:18,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:18,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:19,321 INFO L124 PetriNetUnfolderBase]: 2964/4989 cut-off events. [2024-06-03 20:43:19,321 INFO L125 PetriNetUnfolderBase]: For 418903/418905 co-relation queries the response was YES. [2024-06-03 20:43:19,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42473 conditions, 4989 events. 2964/4989 cut-off events. For 418903/418905 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32568 event pairs, 997 based on Foata normal form. 8/4996 useless extension candidates. Maximal degree in co-relation 42292. Up to 4443 conditions per place. [2024-06-03 20:43:19,400 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 586 selfloop transitions, 30 changer transitions 0/622 dead transitions. [2024-06-03 20:43:19,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 622 transitions, 12742 flow [2024-06-03 20:43:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:43:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:43:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 20:43:19,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 20:43:19,401 INFO L175 Difference]: Start difference. First operand has 406 places, 601 transitions, 11413 flow. Second operand 7 states and 156 transitions. [2024-06-03 20:43:19,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 622 transitions, 12742 flow [2024-06-03 20:43:20,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 622 transitions, 12677 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:20,889 INFO L231 Difference]: Finished difference. Result has 407 places, 601 transitions, 11413 flow [2024-06-03 20:43:20,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11348, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11413, PETRI_PLACES=407, PETRI_TRANSITIONS=601} [2024-06-03 20:43:20,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-03 20:43:20,890 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 601 transitions, 11413 flow [2024-06-03 20:43:20,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:20,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:20,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:20,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:43:20,891 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:20,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1000125419, now seen corresponding path program 9 times [2024-06-03 20:43:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:20,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599604117] [2024-06-03 20:43:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:21,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:21,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599604117] [2024-06-03 20:43:21,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599604117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:21,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:21,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:43:21,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527145559] [2024-06-03 20:43:21,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:21,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:43:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:43:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:43:21,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:21,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 601 transitions, 11413 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:21,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:21,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:21,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:22,227 INFO L124 PetriNetUnfolderBase]: 2951/4970 cut-off events. [2024-06-03 20:43:22,228 INFO L125 PetriNetUnfolderBase]: For 396725/396727 co-relation queries the response was YES. [2024-06-03 20:43:22,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41890 conditions, 4970 events. 2951/4970 cut-off events. For 396725/396727 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32433 event pairs, 976 based on Foata normal form. 6/4975 useless extension candidates. Maximal degree in co-relation 41708. Up to 4344 conditions per place. [2024-06-03 20:43:22,298 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 590 selfloop transitions, 34 changer transitions 0/630 dead transitions. [2024-06-03 20:43:22,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 630 transitions, 12822 flow [2024-06-03 20:43:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:43:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:43:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:43:22,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-03 20:43:22,299 INFO L175 Difference]: Start difference. First operand has 407 places, 601 transitions, 11413 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:43:22,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 630 transitions, 12822 flow [2024-06-03 20:43:23,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 630 transitions, 12743 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:23,995 INFO L231 Difference]: Finished difference. Result has 410 places, 603 transitions, 11453 flow [2024-06-03 20:43:23,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11340, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11453, PETRI_PLACES=410, PETRI_TRANSITIONS=603} [2024-06-03 20:43:23,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-03 20:43:23,997 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 603 transitions, 11453 flow [2024-06-03 20:43:23,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:23,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:23,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:23,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:43:23,997 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:23,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash -194395391, now seen corresponding path program 2 times [2024-06-03 20:43:23,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:23,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72993393] [2024-06-03 20:43:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:23,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:24,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:24,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72993393] [2024-06-03 20:43:24,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72993393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:24,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:24,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:43:24,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105754757] [2024-06-03 20:43:24,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:24,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:43:24,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:24,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:43:24,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:43:24,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:24,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 603 transitions, 11453 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:24,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:24,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:24,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:25,354 INFO L124 PetriNetUnfolderBase]: 2938/4956 cut-off events. [2024-06-03 20:43:25,354 INFO L125 PetriNetUnfolderBase]: For 381296/381298 co-relation queries the response was YES. [2024-06-03 20:43:25,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41340 conditions, 4956 events. 2938/4956 cut-off events. For 381296/381298 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32373 event pairs, 968 based on Foata normal form. 6/4961 useless extension candidates. Maximal degree in co-relation 41156. Up to 4315 conditions per place. [2024-06-03 20:43:25,439 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 582 selfloop transitions, 37 changer transitions 0/625 dead transitions. [2024-06-03 20:43:25,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 625 transitions, 12796 flow [2024-06-03 20:43:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 20:43:25,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 20:43:25,441 INFO L175 Difference]: Start difference. First operand has 410 places, 603 transitions, 11453 flow. Second operand 8 states and 171 transitions. [2024-06-03 20:43:25,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 625 transitions, 12796 flow [2024-06-03 20:43:27,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 625 transitions, 12622 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:27,306 INFO L231 Difference]: Finished difference. Result has 411 places, 603 transitions, 11359 flow [2024-06-03 20:43:27,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11279, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11359, PETRI_PLACES=411, PETRI_TRANSITIONS=603} [2024-06-03 20:43:27,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-03 20:43:27,307 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 603 transitions, 11359 flow [2024-06-03 20:43:27,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:27,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:27,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:27,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:43:27,308 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:27,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash 963368410, now seen corresponding path program 1 times [2024-06-03 20:43:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:27,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669522321] [2024-06-03 20:43:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:27,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:27,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669522321] [2024-06-03 20:43:27,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669522321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:27,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:27,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:43:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329299323] [2024-06-03 20:43:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:27,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:43:27,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:43:27,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:43:27,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:43:27,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 603 transitions, 11359 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:27,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:27,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:43:27,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:29,050 INFO L124 PetriNetUnfolderBase]: 3482/5826 cut-off events. [2024-06-03 20:43:29,051 INFO L125 PetriNetUnfolderBase]: For 443988/443999 co-relation queries the response was YES. [2024-06-03 20:43:29,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48242 conditions, 5826 events. 3482/5826 cut-off events. For 443988/443999 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 38746 event pairs, 665 based on Foata normal form. 4/5823 useless extension candidates. Maximal degree in co-relation 48059. Up to 4578 conditions per place. [2024-06-03 20:43:29,152 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 635 selfloop transitions, 75 changer transitions 0/716 dead transitions. [2024-06-03 20:43:29,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 716 transitions, 14755 flow [2024-06-03 20:43:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:43:29,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:43:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-03 20:43:29,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-03 20:43:29,153 INFO L175 Difference]: Start difference. First operand has 411 places, 603 transitions, 11359 flow. Second operand 11 states and 235 transitions. [2024-06-03 20:43:29,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 716 transitions, 14755 flow [2024-06-03 20:43:31,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 716 transitions, 14660 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:31,055 INFO L231 Difference]: Finished difference. Result has 419 places, 654 transitions, 12696 flow [2024-06-03 20:43:31,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11264, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12696, PETRI_PLACES=419, PETRI_TRANSITIONS=654} [2024-06-03 20:43:31,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-03 20:43:31,055 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 654 transitions, 12696 flow [2024-06-03 20:43:31,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:31,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:31,056 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] [2024-06-03 20:43:31,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:43:31,056 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:31,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1739928856, now seen corresponding path program 2 times [2024-06-03 20:43:31,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:31,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057809602] [2024-06-03 20:43:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:31,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057809602] [2024-06-03 20:43:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057809602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:31,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:31,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:43:31,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185902370] [2024-06-03 20:43:31,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:31,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:43:31,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:31,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:43:31,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:43:31,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:43:31,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 654 transitions, 12696 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:31,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:31,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:43:31,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:32,719 INFO L124 PetriNetUnfolderBase]: 3551/5958 cut-off events. [2024-06-03 20:43:32,720 INFO L125 PetriNetUnfolderBase]: For 502196/502196 co-relation queries the response was YES. [2024-06-03 20:43:32,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51008 conditions, 5958 events. 3551/5958 cut-off events. For 502196/502196 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 39843 event pairs, 458 based on Foata normal form. 4/5951 useless extension candidates. Maximal degree in co-relation 50819. Up to 5011 conditions per place. [2024-06-03 20:43:32,816 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 607 selfloop transitions, 65 changer transitions 0/678 dead transitions. [2024-06-03 20:43:32,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 678 transitions, 14409 flow [2024-06-03 20:43:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 20:43:32,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-03 20:43:32,818 INFO L175 Difference]: Start difference. First operand has 419 places, 654 transitions, 12696 flow. Second operand 8 states and 156 transitions. [2024-06-03 20:43:32,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 678 transitions, 14409 flow [2024-06-03 20:43:34,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 678 transitions, 14247 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-03 20:43:34,887 INFO L231 Difference]: Finished difference. Result has 424 places, 658 transitions, 12815 flow [2024-06-03 20:43:34,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12538, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12815, PETRI_PLACES=424, PETRI_TRANSITIONS=658} [2024-06-03 20:43:34,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-03 20:43:34,888 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 658 transitions, 12815 flow [2024-06-03 20:43:34,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:34,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:34,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:34,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:43:34,889 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:34,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1850109808, now seen corresponding path program 3 times [2024-06-03 20:43:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:34,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245908330] [2024-06-03 20:43:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:35,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245908330] [2024-06-03 20:43:35,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245908330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:35,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:35,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916712756] [2024-06-03 20:43:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:35,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:43:35,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 658 transitions, 12815 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:35,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:35,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:43:35,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:36,564 INFO L124 PetriNetUnfolderBase]: 3605/6036 cut-off events. [2024-06-03 20:43:36,564 INFO L125 PetriNetUnfolderBase]: For 530066/530066 co-relation queries the response was YES. [2024-06-03 20:43:36,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52672 conditions, 6036 events. 3605/6036 cut-off events. For 530066/530066 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40350 event pairs, 522 based on Foata normal form. 2/6027 useless extension candidates. Maximal degree in co-relation 52480. Up to 3546 conditions per place. [2024-06-03 20:43:36,663 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 501 selfloop transitions, 181 changer transitions 0/688 dead transitions. [2024-06-03 20:43:36,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 688 transitions, 14613 flow [2024-06-03 20:43:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 20:43:36,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:43:36,664 INFO L175 Difference]: Start difference. First operand has 424 places, 658 transitions, 12815 flow. Second operand 8 states and 172 transitions. [2024-06-03 20:43:36,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 688 transitions, 14613 flow [2024-06-03 20:43:38,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 688 transitions, 14359 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:38,924 INFO L231 Difference]: Finished difference. Result has 427 places, 661 transitions, 13035 flow [2024-06-03 20:43:38,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12561, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13035, PETRI_PLACES=427, PETRI_TRANSITIONS=661} [2024-06-03 20:43:38,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-03 20:43:38,925 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 661 transitions, 13035 flow [2024-06-03 20:43:38,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:38,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:38,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:38,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:43:38,925 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:38,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:38,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1957650990, now seen corresponding path program 4 times [2024-06-03 20:43:38,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:38,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369232507] [2024-06-03 20:43:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:38,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:39,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:39,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369232507] [2024-06-03 20:43:39,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369232507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:39,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:39,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:39,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456021646] [2024-06-03 20:43:39,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:39,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:39,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:39,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:43:39,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 661 transitions, 13035 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:39,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:39,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:43:39,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:40,543 INFO L124 PetriNetUnfolderBase]: 3621/6062 cut-off events. [2024-06-03 20:43:40,543 INFO L125 PetriNetUnfolderBase]: For 553083/553083 co-relation queries the response was YES. [2024-06-03 20:43:40,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53470 conditions, 6062 events. 3621/6062 cut-off events. For 553083/553083 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 40505 event pairs, 751 based on Foata normal form. 4/6057 useless extension candidates. Maximal degree in co-relation 53276. Up to 5140 conditions per place. [2024-06-03 20:43:40,644 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 552 selfloop transitions, 131 changer transitions 0/689 dead transitions. [2024-06-03 20:43:40,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 689 transitions, 14867 flow [2024-06-03 20:43:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 20:43:40,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-03 20:43:40,645 INFO L175 Difference]: Start difference. First operand has 427 places, 661 transitions, 13035 flow. Second operand 8 states and 167 transitions. [2024-06-03 20:43:40,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 689 transitions, 14867 flow [2024-06-03 20:43:42,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 689 transitions, 14627 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 20:43:42,826 INFO L231 Difference]: Finished difference. Result has 431 places, 667 transitions, 13277 flow [2024-06-03 20:43:42,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12805, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13277, PETRI_PLACES=431, PETRI_TRANSITIONS=667} [2024-06-03 20:43:42,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 20:43:42,827 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 667 transitions, 13277 flow [2024-06-03 20:43:42,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:42,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:42,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:42,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:43:42,828 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:42,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash 309251952, now seen corresponding path program 5 times [2024-06-03 20:43:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:42,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216634809] [2024-06-03 20:43:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:42,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:43,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:43,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216634809] [2024-06-03 20:43:43,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216634809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:43,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:43,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928479059] [2024-06-03 20:43:43,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:43,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:43,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:43,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:43,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:43:43,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 667 transitions, 13277 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:43,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:43,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:43:43,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:44,571 INFO L124 PetriNetUnfolderBase]: 3611/6050 cut-off events. [2024-06-03 20:43:44,571 INFO L125 PetriNetUnfolderBase]: For 534970/534970 co-relation queries the response was YES. [2024-06-03 20:43:44,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53064 conditions, 6050 events. 3611/6050 cut-off events. For 534970/534970 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 40514 event pairs, 755 based on Foata normal form. 4/6047 useless extension candidates. Maximal degree in co-relation 52868. Up to 5203 conditions per place. [2024-06-03 20:43:44,659 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 550 selfloop transitions, 128 changer transitions 0/684 dead transitions. [2024-06-03 20:43:44,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 684 transitions, 14693 flow [2024-06-03 20:43:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 20:43:44,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:43:44,660 INFO L175 Difference]: Start difference. First operand has 431 places, 667 transitions, 13277 flow. Second operand 8 states and 164 transitions. [2024-06-03 20:43:44,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 684 transitions, 14693 flow [2024-06-03 20:43:46,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 684 transitions, 14385 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-03 20:43:46,940 INFO L231 Difference]: Finished difference. Result has 435 places, 667 transitions, 13233 flow [2024-06-03 20:43:46,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12969, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13233, PETRI_PLACES=435, PETRI_TRANSITIONS=667} [2024-06-03 20:43:46,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-03 20:43:46,941 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 667 transitions, 13233 flow [2024-06-03 20:43:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:46,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:46,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:46,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:43:46,942 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:46,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:46,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1450127888, now seen corresponding path program 6 times [2024-06-03 20:43:46,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:46,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517152472] [2024-06-03 20:43:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:46,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:47,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:47,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517152472] [2024-06-03 20:43:47,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517152472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:47,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:47,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:43:47,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718181301] [2024-06-03 20:43:47,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:47,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:43:47,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:47,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:43:47,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:43:47,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:43:47,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 667 transitions, 13233 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:47,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:47,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:43:47,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:48,603 INFO L124 PetriNetUnfolderBase]: 3619/6054 cut-off events. [2024-06-03 20:43:48,604 INFO L125 PetriNetUnfolderBase]: For 533379/533379 co-relation queries the response was YES. [2024-06-03 20:43:48,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53184 conditions, 6054 events. 3619/6054 cut-off events. For 533379/533379 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 40470 event pairs, 745 based on Foata normal form. 2/6041 useless extension candidates. Maximal degree in co-relation 52986. Up to 4981 conditions per place. [2024-06-03 20:43:48,713 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 460 selfloop transitions, 232 changer transitions 0/698 dead transitions. [2024-06-03 20:43:48,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 698 transitions, 15044 flow [2024-06-03 20:43:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 20:43:48,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-03 20:43:48,714 INFO L175 Difference]: Start difference. First operand has 435 places, 667 transitions, 13233 flow. Second operand 9 states and 187 transitions. [2024-06-03 20:43:48,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 698 transitions, 15044 flow [2024-06-03 20:43:51,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 698 transitions, 14772 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:51,071 INFO L231 Difference]: Finished difference. Result has 438 places, 672 transitions, 13603 flow [2024-06-03 20:43:51,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12961, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13603, PETRI_PLACES=438, PETRI_TRANSITIONS=672} [2024-06-03 20:43:51,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-03 20:43:51,072 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 672 transitions, 13603 flow [2024-06-03 20:43:51,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:51,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:51,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:51,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:43:51,074 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:51,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:51,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1441557008, now seen corresponding path program 7 times [2024-06-03 20:43:51,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:51,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090299504] [2024-06-03 20:43:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:51,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:51,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090299504] [2024-06-03 20:43:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090299504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:51,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:51,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:43:51,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803287173] [2024-06-03 20:43:51,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:51,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:43:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:43:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:43:51,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:43:51,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 672 transitions, 13603 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:51,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:51,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:43:51,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:52,793 INFO L124 PetriNetUnfolderBase]: 3627/6074 cut-off events. [2024-06-03 20:43:52,793 INFO L125 PetriNetUnfolderBase]: For 547431/547431 co-relation queries the response was YES. [2024-06-03 20:43:52,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53823 conditions, 6074 events. 3627/6074 cut-off events. For 547431/547431 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 40644 event pairs, 755 based on Foata normal form. 2/6069 useless extension candidates. Maximal degree in co-relation 53623. Up to 5051 conditions per place. [2024-06-03 20:43:52,891 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 460 selfloop transitions, 229 changer transitions 0/695 dead transitions. [2024-06-03 20:43:52,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 695 transitions, 15129 flow [2024-06-03 20:43:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 20:43:52,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932249322493225 [2024-06-03 20:43:52,892 INFO L175 Difference]: Start difference. First operand has 438 places, 672 transitions, 13603 flow. Second operand 9 states and 182 transitions. [2024-06-03 20:43:52,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 695 transitions, 15129 flow [2024-06-03 20:43:55,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 695 transitions, 14749 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:55,468 INFO L231 Difference]: Finished difference. Result has 442 places, 674 transitions, 13764 flow [2024-06-03 20:43:55,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13245, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13764, PETRI_PLACES=442, PETRI_TRANSITIONS=674} [2024-06-03 20:43:55,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-03 20:43:55,469 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 674 transitions, 13764 flow [2024-06-03 20:43:55,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:55,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:55,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:55,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:43:55,469 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:55,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:55,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1154669678, now seen corresponding path program 8 times [2024-06-03 20:43:55,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:55,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740278545] [2024-06-03 20:43:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:55,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:55,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:55,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740278545] [2024-06-03 20:43:55,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740278545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:55,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:55,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:43:55,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793029354] [2024-06-03 20:43:55,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:55,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:43:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:43:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:43:55,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:43:55,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 674 transitions, 13764 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:55,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:55,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:43:55,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:57,160 INFO L124 PetriNetUnfolderBase]: 3622/6067 cut-off events. [2024-06-03 20:43:57,160 INFO L125 PetriNetUnfolderBase]: For 546625/546625 co-relation queries the response was YES. [2024-06-03 20:43:57,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53966 conditions, 6067 events. 3622/6067 cut-off events. For 546625/546625 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 40594 event pairs, 754 based on Foata normal form. 2/6062 useless extension candidates. Maximal degree in co-relation 53764. Up to 5044 conditions per place. [2024-06-03 20:43:57,259 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 227 changer transitions 0/692 dead transitions. [2024-06-03 20:43:57,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 692 transitions, 15198 flow [2024-06-03 20:43:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 20:43:57,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-03 20:43:57,260 INFO L175 Difference]: Start difference. First operand has 442 places, 674 transitions, 13764 flow. Second operand 9 states and 180 transitions. [2024-06-03 20:43:57,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 692 transitions, 15198 flow [2024-06-03 20:43:59,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 692 transitions, 14705 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:59,783 INFO L231 Difference]: Finished difference. Result has 444 places, 674 transitions, 13732 flow [2024-06-03 20:43:59,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13271, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13732, PETRI_PLACES=444, PETRI_TRANSITIONS=674} [2024-06-03 20:43:59,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-03 20:43:59,784 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 674 transitions, 13732 flow [2024-06-03 20:43:59,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:59,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:59,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:59,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:43:59,784 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:59,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:59,785 INFO L85 PathProgramCache]: Analyzing trace with hash -177110576, now seen corresponding path program 9 times [2024-06-03 20:43:59,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:59,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368852015] [2024-06-03 20:43:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:59,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:00,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:00,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368852015] [2024-06-03 20:44:00,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368852015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:00,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:00,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:44:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484868466] [2024-06-03 20:44:00,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:00,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:44:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:44:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:44:00,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:00,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 674 transitions, 13732 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:00,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:00,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:00,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:01,629 INFO L124 PetriNetUnfolderBase]: 3610/6038 cut-off events. [2024-06-03 20:44:01,629 INFO L125 PetriNetUnfolderBase]: For 547167/547167 co-relation queries the response was YES. [2024-06-03 20:44:01,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53698 conditions, 6038 events. 3610/6038 cut-off events. For 547167/547167 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 40420 event pairs, 741 based on Foata normal form. 2/6026 useless extension candidates. Maximal degree in co-relation 53495. Up to 5137 conditions per place. [2024-06-03 20:44:01,723 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 555 selfloop transitions, 136 changer transitions 0/697 dead transitions. [2024-06-03 20:44:01,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 697 transitions, 15202 flow [2024-06-03 20:44:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 20:44:01,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 20:44:01,725 INFO L175 Difference]: Start difference. First operand has 444 places, 674 transitions, 13732 flow. Second operand 8 states and 170 transitions. [2024-06-03 20:44:01,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 697 transitions, 15202 flow [2024-06-03 20:44:04,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 697 transitions, 14689 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 20:44:04,195 INFO L231 Difference]: Finished difference. Result has 445 places, 674 transitions, 13503 flow [2024-06-03 20:44:04,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13219, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13503, PETRI_PLACES=445, PETRI_TRANSITIONS=674} [2024-06-03 20:44:04,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-03 20:44:04,196 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 674 transitions, 13503 flow [2024-06-03 20:44:04,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:04,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:04,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:04,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:44:04,197 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:04,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:04,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1445270963, now seen corresponding path program 1 times [2024-06-03 20:44:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:04,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319463262] [2024-06-03 20:44:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:04,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:04,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319463262] [2024-06-03 20:44:04,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319463262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:04,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:04,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:44:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258170741] [2024-06-03 20:44:04,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:04,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:44:04,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:44:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:44:04,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:04,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 674 transitions, 13503 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:04,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:04,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:04,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:06,169 INFO L124 PetriNetUnfolderBase]: 3631/6084 cut-off events. [2024-06-03 20:44:06,169 INFO L125 PetriNetUnfolderBase]: For 560763/560763 co-relation queries the response was YES. [2024-06-03 20:44:06,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54061 conditions, 6084 events. 3631/6084 cut-off events. For 560763/560763 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 40827 event pairs, 750 based on Foata normal form. 1/6081 useless extension candidates. Maximal degree in co-relation 53857. Up to 5113 conditions per place. [2024-06-03 20:44:06,281 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 510 selfloop transitions, 211 changer transitions 0/727 dead transitions. [2024-06-03 20:44:06,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 727 transitions, 15795 flow [2024-06-03 20:44:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:44:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:44:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-03 20:44:06,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50093808630394 [2024-06-03 20:44:06,283 INFO L175 Difference]: Start difference. First operand has 445 places, 674 transitions, 13503 flow. Second operand 13 states and 267 transitions. [2024-06-03 20:44:06,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 727 transitions, 15795 flow [2024-06-03 20:44:08,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 727 transitions, 15509 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:44:08,950 INFO L231 Difference]: Finished difference. Result has 453 places, 685 transitions, 13921 flow [2024-06-03 20:44:08,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13221, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13921, PETRI_PLACES=453, PETRI_TRANSITIONS=685} [2024-06-03 20:44:08,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-03 20:44:08,951 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 685 transitions, 13921 flow [2024-06-03 20:44:08,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:08,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:08,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:08,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:44:08,952 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:08,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1982869129, now seen corresponding path program 2 times [2024-06-03 20:44:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:08,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232272373] [2024-06-03 20:44:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:08,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:09,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:09,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232272373] [2024-06-03 20:44:09,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232272373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:09,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:09,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:44:09,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209935017] [2024-06-03 20:44:09,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:09,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:44:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:09,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:44:09,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:44:09,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:09,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 685 transitions, 13921 flow. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:09,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:09,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:09,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:10,783 INFO L124 PetriNetUnfolderBase]: 3636/6093 cut-off events. [2024-06-03 20:44:10,783 INFO L125 PetriNetUnfolderBase]: For 572591/572591 co-relation queries the response was YES. [2024-06-03 20:44:10,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54403 conditions, 6093 events. 3636/6093 cut-off events. For 572591/572591 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40909 event pairs, 750 based on Foata normal form. 1/6090 useless extension candidates. Maximal degree in co-relation 54196. Up to 5119 conditions per place. [2024-06-03 20:44:10,883 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 503 selfloop transitions, 217 changer transitions 0/726 dead transitions. [2024-06-03 20:44:10,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 726 transitions, 16023 flow [2024-06-03 20:44:10,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:44:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:44:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-03 20:44:10,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:44:10,884 INFO L175 Difference]: Start difference. First operand has 453 places, 685 transitions, 13921 flow. Second operand 12 states and 246 transitions. [2024-06-03 20:44:10,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 726 transitions, 16023 flow [2024-06-03 20:44:13,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 726 transitions, 15543 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-03 20:44:13,347 INFO L231 Difference]: Finished difference. Result has 458 places, 690 transitions, 14009 flow [2024-06-03 20:44:13,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13447, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14009, PETRI_PLACES=458, PETRI_TRANSITIONS=690} [2024-06-03 20:44:13,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-03 20:44:13,348 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 690 transitions, 14009 flow [2024-06-03 20:44:13,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:13,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:13,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:13,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:44:13,349 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:13,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 772115073, now seen corresponding path program 3 times [2024-06-03 20:44:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:13,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077718544] [2024-06-03 20:44:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:13,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:13,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:13,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077718544] [2024-06-03 20:44:13,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077718544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:13,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:13,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:44:13,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140546005] [2024-06-03 20:44:13,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:13,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:44:13,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:44:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:44:13,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:13,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 690 transitions, 14009 flow. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:13,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:13,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:13,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:15,224 INFO L124 PetriNetUnfolderBase]: 3649/6110 cut-off events. [2024-06-03 20:44:15,224 INFO L125 PetriNetUnfolderBase]: For 587106/587106 co-relation queries the response was YES. [2024-06-03 20:44:15,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54832 conditions, 6110 events. 3649/6110 cut-off events. For 587106/587106 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 41005 event pairs, 750 based on Foata normal form. 1/6107 useless extension candidates. Maximal degree in co-relation 54622. Up to 5134 conditions per place. [2024-06-03 20:44:15,338 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 504 selfloop transitions, 219 changer transitions 0/729 dead transitions. [2024-06-03 20:44:15,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 729 transitions, 16151 flow [2024-06-03 20:44:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:44:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:44:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-03 20:44:15,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49796747967479676 [2024-06-03 20:44:15,340 INFO L175 Difference]: Start difference. First operand has 458 places, 690 transitions, 14009 flow. Second operand 12 states and 245 transitions. [2024-06-03 20:44:15,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 729 transitions, 16151 flow [2024-06-03 20:44:17,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 729 transitions, 15565 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-03 20:44:17,702 INFO L231 Difference]: Finished difference. Result has 462 places, 697 transitions, 14029 flow [2024-06-03 20:44:17,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13463, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14029, PETRI_PLACES=462, PETRI_TRANSITIONS=697} [2024-06-03 20:44:17,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-03 20:44:17,704 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 697 transitions, 14029 flow [2024-06-03 20:44:17,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:17,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:17,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:17,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:44:17,704 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:17,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash 600345933, now seen corresponding path program 4 times [2024-06-03 20:44:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20562252] [2024-06-03 20:44:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:17,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:17,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:17,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20562252] [2024-06-03 20:44:17,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20562252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:17,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:17,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:44:17,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901859320] [2024-06-03 20:44:17,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:17,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:44:17,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:17,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:44:17,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:44:18,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:18,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 697 transitions, 14029 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:18,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:18,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:18,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:19,617 INFO L124 PetriNetUnfolderBase]: 3662/6137 cut-off events. [2024-06-03 20:44:19,618 INFO L125 PetriNetUnfolderBase]: For 600661/600661 co-relation queries the response was YES. [2024-06-03 20:44:19,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55119 conditions, 6137 events. 3662/6137 cut-off events. For 600661/600661 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 41241 event pairs, 750 based on Foata normal form. 1/6134 useless extension candidates. Maximal degree in co-relation 54907. Up to 5149 conditions per place. [2024-06-03 20:44:19,717 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 507 selfloop transitions, 226 changer transitions 0/739 dead transitions. [2024-06-03 20:44:19,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 739 transitions, 16171 flow [2024-06-03 20:44:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:44:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:44:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-03 20:44:19,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49530956848030017 [2024-06-03 20:44:19,718 INFO L175 Difference]: Start difference. First operand has 462 places, 697 transitions, 14029 flow. Second operand 13 states and 264 transitions. [2024-06-03 20:44:19,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 739 transitions, 16171 flow [2024-06-03 20:44:22,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 739 transitions, 15816 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 20:44:22,155 INFO L231 Difference]: Finished difference. Result has 468 places, 704 transitions, 14266 flow [2024-06-03 20:44:22,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13680, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14266, PETRI_PLACES=468, PETRI_TRANSITIONS=704} [2024-06-03 20:44:22,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-03 20:44:22,169 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 704 transitions, 14266 flow [2024-06-03 20:44:22,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:22,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:22,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:22,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:44:22,170 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:22,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:22,170 INFO L85 PathProgramCache]: Analyzing trace with hash 600351513, now seen corresponding path program 5 times [2024-06-03 20:44:22,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:22,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955085569] [2024-06-03 20:44:22,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:22,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:22,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:22,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955085569] [2024-06-03 20:44:22,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955085569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:22,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:22,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:44:22,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046715046] [2024-06-03 20:44:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:22,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:44:22,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:44:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:44:22,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:22,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 704 transitions, 14266 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:22,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:22,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:22,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:24,192 INFO L124 PetriNetUnfolderBase]: 3659/6133 cut-off events. [2024-06-03 20:44:24,192 INFO L125 PetriNetUnfolderBase]: For 608006/608006 co-relation queries the response was YES. [2024-06-03 20:44:24,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55172 conditions, 6133 events. 3659/6133 cut-off events. For 608006/608006 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 41209 event pairs, 750 based on Foata normal form. 1/6130 useless extension candidates. Maximal degree in co-relation 54958. Up to 5146 conditions per place. [2024-06-03 20:44:24,287 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 507 selfloop transitions, 227 changer transitions 0/740 dead transitions. [2024-06-03 20:44:24,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 740 transitions, 16092 flow [2024-06-03 20:44:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:44:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:44:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 293 transitions. [2024-06-03 20:44:24,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4764227642276423 [2024-06-03 20:44:24,289 INFO L175 Difference]: Start difference. First operand has 468 places, 704 transitions, 14266 flow. Second operand 15 states and 293 transitions. [2024-06-03 20:44:24,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 740 transitions, 16092 flow [2024-06-03 20:44:26,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 740 transitions, 15743 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 20:44:26,677 INFO L231 Difference]: Finished difference. Result has 474 places, 704 transitions, 14377 flow [2024-06-03 20:44:26,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13917, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14377, PETRI_PLACES=474, PETRI_TRANSITIONS=704} [2024-06-03 20:44:26,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-03 20:44:26,677 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 704 transitions, 14377 flow [2024-06-03 20:44:26,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:26,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:26,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:26,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:44:26,678 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:26,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1420147153, now seen corresponding path program 6 times [2024-06-03 20:44:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999109425] [2024-06-03 20:44:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:26,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:26,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999109425] [2024-06-03 20:44:26,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999109425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:26,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:26,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:44:26,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920129422] [2024-06-03 20:44:26,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:26,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:44:26,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:44:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:44:27,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:27,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 704 transitions, 14377 flow. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:27,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:27,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:27,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:28,548 INFO L124 PetriNetUnfolderBase]: 3656/6129 cut-off events. [2024-06-03 20:44:28,549 INFO L125 PetriNetUnfolderBase]: For 615654/615654 co-relation queries the response was YES. [2024-06-03 20:44:28,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55200 conditions, 6129 events. 3656/6129 cut-off events. For 615654/615654 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 41230 event pairs, 750 based on Foata normal form. 1/6126 useless extension candidates. Maximal degree in co-relation 54985. Up to 5143 conditions per place. [2024-06-03 20:44:28,661 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 499 selfloop transitions, 229 changer transitions 0/734 dead transitions. [2024-06-03 20:44:28,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 734 transitions, 16173 flow [2024-06-03 20:44:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:44:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:44:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-03 20:44:28,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-03 20:44:28,662 INFO L175 Difference]: Start difference. First operand has 474 places, 704 transitions, 14377 flow. Second operand 12 states and 244 transitions. [2024-06-03 20:44:28,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 734 transitions, 16173 flow [2024-06-03 20:44:31,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 734 transitions, 15711 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-03 20:44:31,450 INFO L231 Difference]: Finished difference. Result has 473 places, 704 transitions, 14379 flow [2024-06-03 20:44:31,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13915, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14379, PETRI_PLACES=473, PETRI_TRANSITIONS=704} [2024-06-03 20:44:31,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-03 20:44:31,450 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 704 transitions, 14379 flow [2024-06-03 20:44:31,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:31,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:31,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:44:31,451 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:31,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash 887597544, now seen corresponding path program 1 times [2024-06-03 20:44:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:31,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961005475] [2024-06-03 20:44:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:31,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961005475] [2024-06-03 20:44:31,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961005475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:31,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:44:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513991159] [2024-06-03 20:44:31,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:31,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:44:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:44:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:44:31,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:31,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 704 transitions, 14379 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:31,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:31,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:31,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:33,328 INFO L124 PetriNetUnfolderBase]: 3692/6183 cut-off events. [2024-06-03 20:44:33,329 INFO L125 PetriNetUnfolderBase]: For 677852/677852 co-relation queries the response was YES. [2024-06-03 20:44:33,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55949 conditions, 6183 events. 3692/6183 cut-off events. For 677852/677852 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 41547 event pairs, 752 based on Foata normal form. 10/6189 useless extension candidates. Maximal degree in co-relation 55733. Up to 5285 conditions per place. [2024-06-03 20:44:33,435 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 565 selfloop transitions, 166 changer transitions 0/737 dead transitions. [2024-06-03 20:44:33,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 737 transitions, 16053 flow [2024-06-03 20:44:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:44:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:44:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-03 20:44:33,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-03 20:44:33,436 INFO L175 Difference]: Start difference. First operand has 473 places, 704 transitions, 14379 flow. Second operand 12 states and 247 transitions. [2024-06-03 20:44:33,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 737 transitions, 16053 flow [2024-06-03 20:44:36,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 737 transitions, 15621 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:44:36,142 INFO L231 Difference]: Finished difference. Result has 476 places, 706 transitions, 14356 flow [2024-06-03 20:44:36,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13947, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14356, PETRI_PLACES=476, PETRI_TRANSITIONS=706} [2024-06-03 20:44:36,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-03 20:44:36,143 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 706 transitions, 14356 flow [2024-06-03 20:44:36,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:36,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:36,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:36,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:44:36,143 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:36,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:36,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2107593289, now seen corresponding path program 7 times [2024-06-03 20:44:36,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:36,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113615288] [2024-06-03 20:44:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:36,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:36,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:36,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113615288] [2024-06-03 20:44:36,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113615288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:36,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:36,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:44:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111879830] [2024-06-03 20:44:36,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:36,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:44:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:44:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:44:36,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:36,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 706 transitions, 14356 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:36,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:36,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:36,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:38,338 INFO L124 PetriNetUnfolderBase]: 3697/6194 cut-off events. [2024-06-03 20:44:38,338 INFO L125 PetriNetUnfolderBase]: For 642252/642252 co-relation queries the response was YES. [2024-06-03 20:44:38,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56125 conditions, 6194 events. 3697/6194 cut-off events. For 642252/642252 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 41694 event pairs, 754 based on Foata normal form. 1/6191 useless extension candidates. Maximal degree in co-relation 55908. Up to 5205 conditions per place. [2024-06-03 20:44:38,445 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 504 selfloop transitions, 230 changer transitions 0/740 dead transitions. [2024-06-03 20:44:38,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 740 transitions, 16226 flow [2024-06-03 20:44:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:44:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:44:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 260 transitions. [2024-06-03 20:44:38,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-03 20:44:38,447 INFO L175 Difference]: Start difference. First operand has 476 places, 706 transitions, 14356 flow. Second operand 13 states and 260 transitions. [2024-06-03 20:44:38,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 740 transitions, 16226 flow [2024-06-03 20:44:41,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 740 transitions, 15838 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-06-03 20:44:41,140 INFO L231 Difference]: Finished difference. Result has 478 places, 709 transitions, 14492 flow [2024-06-03 20:44:41,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13970, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14492, PETRI_PLACES=478, PETRI_TRANSITIONS=709} [2024-06-03 20:44:41,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-03 20:44:41,141 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 709 transitions, 14492 flow [2024-06-03 20:44:41,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:41,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:41,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:41,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:44:41,142 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:41,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash 927097017, now seen corresponding path program 8 times [2024-06-03 20:44:41,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:41,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179202058] [2024-06-03 20:44:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:41,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:41,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:41,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179202058] [2024-06-03 20:44:41,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179202058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:41,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:44:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124104667] [2024-06-03 20:44:41,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:41,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:44:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:44:41,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:44:41,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:41,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 709 transitions, 14492 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:41,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:41,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:41,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:43,030 INFO L124 PetriNetUnfolderBase]: 3702/6203 cut-off events. [2024-06-03 20:44:43,030 INFO L125 PetriNetUnfolderBase]: For 638514/638514 co-relation queries the response was YES. [2024-06-03 20:44:43,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55944 conditions, 6203 events. 3702/6203 cut-off events. For 638514/638514 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 41783 event pairs, 754 based on Foata normal form. 1/6200 useless extension candidates. Maximal degree in co-relation 55726. Up to 5211 conditions per place. [2024-06-03 20:44:43,153 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 508 selfloop transitions, 230 changer transitions 0/744 dead transitions. [2024-06-03 20:44:43,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 744 transitions, 16584 flow [2024-06-03 20:44:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:44:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:44:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-03 20:44:43,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915572232645403 [2024-06-03 20:44:43,154 INFO L175 Difference]: Start difference. First operand has 478 places, 709 transitions, 14492 flow. Second operand 13 states and 262 transitions. [2024-06-03 20:44:43,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 744 transitions, 16584 flow [2024-06-03 20:44:45,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 744 transitions, 16256 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 20:44:45,904 INFO L231 Difference]: Finished difference. Result has 483 places, 713 transitions, 14718 flow [2024-06-03 20:44:45,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14167, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14718, PETRI_PLACES=483, PETRI_TRANSITIONS=713} [2024-06-03 20:44:45,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-03 20:44:45,905 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 713 transitions, 14718 flow [2024-06-03 20:44:45,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:45,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:45,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:45,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:44:45,906 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:45,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:45,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1923250991, now seen corresponding path program 9 times [2024-06-03 20:44:45,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:45,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733928442] [2024-06-03 20:44:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:45,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:46,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:46,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733928442] [2024-06-03 20:44:46,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733928442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:46,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:46,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:44:46,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993657796] [2024-06-03 20:44:46,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:46,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:44:46,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:46,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:44:46,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:44:46,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:46,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 713 transitions, 14718 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:46,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:46,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:46,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:47,873 INFO L124 PetriNetUnfolderBase]: 3715/6225 cut-off events. [2024-06-03 20:44:47,873 INFO L125 PetriNetUnfolderBase]: For 658218/658218 co-relation queries the response was YES. [2024-06-03 20:44:47,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56446 conditions, 6225 events. 3715/6225 cut-off events. For 658218/658218 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 41950 event pairs, 754 based on Foata normal form. 1/6222 useless extension candidates. Maximal degree in co-relation 56226. Up to 5226 conditions per place. [2024-06-03 20:44:47,980 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 505 selfloop transitions, 240 changer transitions 0/751 dead transitions. [2024-06-03 20:44:47,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 751 transitions, 17094 flow [2024-06-03 20:44:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:44:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:44:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 266 transitions. [2024-06-03 20:44:47,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49906191369606 [2024-06-03 20:44:47,982 INFO L175 Difference]: Start difference. First operand has 483 places, 713 transitions, 14718 flow. Second operand 13 states and 266 transitions. [2024-06-03 20:44:47,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 751 transitions, 17094 flow [2024-06-03 20:44:50,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 751 transitions, 16741 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-03 20:44:50,983 INFO L231 Difference]: Finished difference. Result has 487 places, 720 transitions, 15040 flow [2024-06-03 20:44:50,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14371, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15040, PETRI_PLACES=487, PETRI_TRANSITIONS=720} [2024-06-03 20:44:50,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-03 20:44:50,984 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 720 transitions, 15040 flow [2024-06-03 20:44:50,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:50,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:50,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:50,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:44:50,984 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:50,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:50,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1535259763, now seen corresponding path program 10 times [2024-06-03 20:44:50,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:50,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472939609] [2024-06-03 20:44:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:50,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:51,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472939609] [2024-06-03 20:44:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472939609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:51,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:51,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:44:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238074296] [2024-06-03 20:44:51,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:51,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:44:51,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:44:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:44:51,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:51,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 720 transitions, 15040 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:51,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:51,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:51,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:53,007 INFO L124 PetriNetUnfolderBase]: 3712/6221 cut-off events. [2024-06-03 20:44:53,007 INFO L125 PetriNetUnfolderBase]: For 666395/666395 co-relation queries the response was YES. [2024-06-03 20:44:53,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56567 conditions, 6221 events. 3712/6221 cut-off events. For 666395/666395 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 41970 event pairs, 754 based on Foata normal form. 1/6218 useless extension candidates. Maximal degree in co-relation 56345. Up to 5223 conditions per place. [2024-06-03 20:44:53,110 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 508 selfloop transitions, 237 changer transitions 0/751 dead transitions. [2024-06-03 20:44:53,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 751 transitions, 16860 flow [2024-06-03 20:44:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:44:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:44:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 293 transitions. [2024-06-03 20:44:53,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4764227642276423 [2024-06-03 20:44:53,111 INFO L175 Difference]: Start difference. First operand has 487 places, 720 transitions, 15040 flow. Second operand 15 states and 293 transitions. [2024-06-03 20:44:53,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 751 transitions, 16860 flow [2024-06-03 20:44:56,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 751 transitions, 16201 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-03 20:44:56,095 INFO L231 Difference]: Finished difference. Result has 491 places, 720 transitions, 14861 flow [2024-06-03 20:44:56,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14381, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14861, PETRI_PLACES=491, PETRI_TRANSITIONS=720} [2024-06-03 20:44:56,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-03 20:44:56,096 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 720 transitions, 14861 flow [2024-06-03 20:44:56,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:56,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:56,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:56,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:44:56,097 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:56,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:56,097 INFO L85 PathProgramCache]: Analyzing trace with hash 887406243, now seen corresponding path program 11 times [2024-06-03 20:44:56,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:56,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090681551] [2024-06-03 20:44:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:56,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:56,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:56,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090681551] [2024-06-03 20:44:56,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090681551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:56,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:56,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:44:56,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200526806] [2024-06-03 20:44:56,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:56,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:44:56,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:44:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:44:56,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:44:56,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 720 transitions, 14861 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:56,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:56,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:44:56,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:58,038 INFO L124 PetriNetUnfolderBase]: 3709/6212 cut-off events. [2024-06-03 20:44:58,038 INFO L125 PetriNetUnfolderBase]: For 668729/668729 co-relation queries the response was YES. [2024-06-03 20:44:58,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56356 conditions, 6212 events. 3709/6212 cut-off events. For 668729/668729 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 41815 event pairs, 754 based on Foata normal form. 1/6209 useless extension candidates. Maximal degree in co-relation 56134. Up to 5220 conditions per place. [2024-06-03 20:44:58,327 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 507 selfloop transitions, 237 changer transitions 0/750 dead transitions. [2024-06-03 20:44:58,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 750 transitions, 16891 flow [2024-06-03 20:44:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:44:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:44:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-03 20:44:58,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49530956848030017 [2024-06-03 20:44:58,328 INFO L175 Difference]: Start difference. First operand has 491 places, 720 transitions, 14861 flow. Second operand 13 states and 264 transitions. [2024-06-03 20:44:58,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 750 transitions, 16891 flow [2024-06-03 20:45:01,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 750 transitions, 16409 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-03 20:45:01,384 INFO L231 Difference]: Finished difference. Result has 491 places, 720 transitions, 14859 flow [2024-06-03 20:45:01,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14379, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14859, PETRI_PLACES=491, PETRI_TRANSITIONS=720} [2024-06-03 20:45:01,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-03 20:45:01,384 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 720 transitions, 14859 flow [2024-06-03 20:45:01,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:01,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:01,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:01,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:45:01,385 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)] === [2024-06-03 20:45:01,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash 887590383, now seen corresponding path program 12 times [2024-06-03 20:45:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:01,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576846018] [2024-06-03 20:45:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:01,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:01,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:01,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576846018] [2024-06-03 20:45:01,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576846018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:01,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:01,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:45:01,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635214567] [2024-06-03 20:45:01,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:01,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:45:01,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:45:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:45:01,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:45:01,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 720 transitions, 14859 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:01,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:01,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:45:01,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:03,286 INFO L124 PetriNetUnfolderBase]: 3706/6208 cut-off events. [2024-06-03 20:45:03,286 INFO L125 PetriNetUnfolderBase]: For 674119/674119 co-relation queries the response was YES. [2024-06-03 20:45:03,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56313 conditions, 6208 events. 3706/6208 cut-off events. For 674119/674119 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 41807 event pairs, 754 based on Foata normal form. 1/6205 useless extension candidates. Maximal degree in co-relation 56090. Up to 5217 conditions per place. [2024-06-03 20:45:03,400 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 500 selfloop transitions, 245 changer transitions 0/751 dead transitions. [2024-06-03 20:45:03,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 751 transitions, 16683 flow [2024-06-03 20:45:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:45:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:45:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-03 20:45:03,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-03 20:45:03,402 INFO L175 Difference]: Start difference. First operand has 491 places, 720 transitions, 14859 flow. Second operand 15 states and 298 transitions. [2024-06-03 20:45:03,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 751 transitions, 16683 flow [2024-06-03 20:45:06,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 751 transitions, 16195 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 20:45:06,573 INFO L231 Difference]: Finished difference. Result has 495 places, 720 transitions, 14867 flow [2024-06-03 20:45:06,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14371, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14867, PETRI_PLACES=495, PETRI_TRANSITIONS=720} [2024-06-03 20:45:06,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-03 20:45:06,574 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 720 transitions, 14867 flow [2024-06-03 20:45:06,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:06,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:06,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:06,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:45:06,575 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)] === [2024-06-03 20:45:06,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1865156646, now seen corresponding path program 2 times [2024-06-03 20:45:06,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:06,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469998617] [2024-06-03 20:45:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:06,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:06,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:06,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469998617] [2024-06-03 20:45:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469998617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:06,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361228317] [2024-06-03 20:45:06,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:06,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:06,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:06,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:06,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:45:06,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 720 transitions, 14867 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:06,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:06,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:45:06,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:08,456 INFO L124 PetriNetUnfolderBase]: 3742/6258 cut-off events. [2024-06-03 20:45:08,456 INFO L125 PetriNetUnfolderBase]: For 742369/742369 co-relation queries the response was YES. [2024-06-03 20:45:08,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57067 conditions, 6258 events. 3742/6258 cut-off events. For 742369/742369 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 42090 event pairs, 758 based on Foata normal form. 10/6261 useless extension candidates. Maximal degree in co-relation 56843. Up to 5351 conditions per place. [2024-06-03 20:45:08,565 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 588 selfloop transitions, 149 changer transitions 0/743 dead transitions. [2024-06-03 20:45:08,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 743 transitions, 16503 flow [2024-06-03 20:45:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:45:08,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:45:08,566 INFO L175 Difference]: Start difference. First operand has 495 places, 720 transitions, 14867 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:45:08,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 743 transitions, 16503 flow [2024-06-03 20:45:11,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 743 transitions, 15857 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-03 20:45:11,707 INFO L231 Difference]: Finished difference. Result has 489 places, 722 transitions, 14600 flow [2024-06-03 20:45:11,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14221, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14600, PETRI_PLACES=489, PETRI_TRANSITIONS=722} [2024-06-03 20:45:11,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-03 20:45:11,708 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 722 transitions, 14600 flow [2024-06-03 20:45:11,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:11,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:11,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:11,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:45:11,708 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)] === [2024-06-03 20:45:11,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:11,709 INFO L85 PathProgramCache]: Analyzing trace with hash -797656412, now seen corresponding path program 3 times [2024-06-03 20:45:11,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:11,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074479514] [2024-06-03 20:45:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:11,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:12,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:12,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074479514] [2024-06-03 20:45:12,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074479514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:12,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:12,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:45:12,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797789605] [2024-06-03 20:45:12,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:12,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:45:12,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:12,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:45:12,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:45:12,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:45:12,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 722 transitions, 14600 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:12,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:12,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:45:12,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:13,962 INFO L124 PetriNetUnfolderBase]: 3778/6320 cut-off events. [2024-06-03 20:45:13,962 INFO L125 PetriNetUnfolderBase]: For 755798/755798 co-relation queries the response was YES. [2024-06-03 20:45:14,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57713 conditions, 6320 events. 3778/6320 cut-off events. For 755798/755798 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 42680 event pairs, 758 based on Foata normal form. 10/6329 useless extension candidates. Maximal degree in co-relation 57489. Up to 5545 conditions per place. [2024-06-03 20:45:14,064 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 643 selfloop transitions, 108 changer transitions 0/757 dead transitions. [2024-06-03 20:45:14,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 757 transitions, 16336 flow [2024-06-03 20:45:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:45:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:45:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-03 20:45:14,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:45:14,065 INFO L175 Difference]: Start difference. First operand has 489 places, 722 transitions, 14600 flow. Second operand 12 states and 246 transitions. [2024-06-03 20:45:14,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 757 transitions, 16336 flow [2024-06-03 20:45:17,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 757 transitions, 15993 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:45:17,295 INFO L231 Difference]: Finished difference. Result has 495 places, 724 transitions, 14558 flow [2024-06-03 20:45:17,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14259, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14558, PETRI_PLACES=495, PETRI_TRANSITIONS=724} [2024-06-03 20:45:17,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-03 20:45:17,296 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 724 transitions, 14558 flow [2024-06-03 20:45:17,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:17,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:17,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:17,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:45:17,297 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)] === [2024-06-03 20:45:17,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:17,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1892559004, now seen corresponding path program 4 times [2024-06-03 20:45:17,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:17,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027490899] [2024-06-03 20:45:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:17,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:17,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:17,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027490899] [2024-06-03 20:45:17,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027490899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:17,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:17,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:17,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666904631] [2024-06-03 20:45:17,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:17,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:17,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:17,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:45:17,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 724 transitions, 14558 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:17,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:17,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:45:17,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:19,724 INFO L124 PetriNetUnfolderBase]: 4046/6760 cut-off events. [2024-06-03 20:45:19,724 INFO L125 PetriNetUnfolderBase]: For 1009382/1009382 co-relation queries the response was YES. [2024-06-03 20:45:19,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65100 conditions, 6760 events. 4046/6760 cut-off events. For 1009382/1009382 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 45825 event pairs, 856 based on Foata normal form. 10/6762 useless extension candidates. Maximal degree in co-relation 64874. Up to 5057 conditions per place. [2024-06-03 20:45:19,929 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 596 selfloop transitions, 153 changer transitions 0/755 dead transitions. [2024-06-03 20:45:19,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 755 transitions, 16595 flow [2024-06-03 20:45:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:45:19,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:45:19,931 INFO L175 Difference]: Start difference. First operand has 495 places, 724 transitions, 14558 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:45:19,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 755 transitions, 16595 flow [2024-06-03 20:45:24,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 755 transitions, 16328 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-03 20:45:24,231 INFO L231 Difference]: Finished difference. Result has 494 places, 729 transitions, 14820 flow [2024-06-03 20:45:24,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14297, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14820, PETRI_PLACES=494, PETRI_TRANSITIONS=729} [2024-06-03 20:45:24,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-03 20:45:24,232 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 729 transitions, 14820 flow [2024-06-03 20:45:24,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:24,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:24,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:24,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:45:24,232 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)] === [2024-06-03 20:45:24,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:24,233 INFO L85 PathProgramCache]: Analyzing trace with hash -805943363, now seen corresponding path program 13 times [2024-06-03 20:45:24,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:24,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459379467] [2024-06-03 20:45:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:24,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:24,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:24,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459379467] [2024-06-03 20:45:24,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459379467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:24,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:24,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:45:24,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477315696] [2024-06-03 20:45:24,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:24,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:45:24,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:24,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:45:24,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:45:24,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:45:24,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 729 transitions, 14820 flow. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:24,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:24,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:45:24,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:26,904 INFO L124 PetriNetUnfolderBase]: 4051/6753 cut-off events. [2024-06-03 20:45:26,905 INFO L125 PetriNetUnfolderBase]: For 973587/973587 co-relation queries the response was YES. [2024-06-03 20:45:26,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65312 conditions, 6753 events. 4051/6753 cut-off events. For 973587/973587 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 45869 event pairs, 877 based on Foata normal form. 1/6753 useless extension candidates. Maximal degree in co-relation 65085. Up to 5983 conditions per place. [2024-06-03 20:45:27,018 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 634 selfloop transitions, 123 changer transitions 0/763 dead transitions. [2024-06-03 20:45:27,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 763 transitions, 16764 flow [2024-06-03 20:45:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:45:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:45:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-03 20:45:27,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48592870544090055 [2024-06-03 20:45:27,019 INFO L175 Difference]: Start difference. First operand has 494 places, 729 transitions, 14820 flow. Second operand 13 states and 259 transitions. [2024-06-03 20:45:27,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 763 transitions, 16764 flow [2024-06-03 20:45:30,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 763 transitions, 16534 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 20:45:30,969 INFO L231 Difference]: Finished difference. Result has 503 places, 732 transitions, 14924 flow [2024-06-03 20:45:30,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14592, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14924, PETRI_PLACES=503, PETRI_TRANSITIONS=732} [2024-06-03 20:45:30,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-03 20:45:30,970 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 732 transitions, 14924 flow [2024-06-03 20:45:30,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:30,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:30,970 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] [2024-06-03 20:45:30,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:45:30,970 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)] === [2024-06-03 20:45:30,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:30,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1541187857, now seen corresponding path program 14 times [2024-06-03 20:45:30,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:30,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047523824] [2024-06-03 20:45:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:30,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047523824] [2024-06-03 20:45:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047523824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:31,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:31,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:45:31,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80495804] [2024-06-03 20:45:31,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:31,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:45:31,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:45:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:45:31,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:45:31,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 732 transitions, 14924 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:31,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:31,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:45:31,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:33,434 INFO L124 PetriNetUnfolderBase]: 4056/6762 cut-off events. [2024-06-03 20:45:33,434 INFO L125 PetriNetUnfolderBase]: For 967087/967087 co-relation queries the response was YES. [2024-06-03 20:45:33,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65152 conditions, 6762 events. 4056/6762 cut-off events. For 967087/967087 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 45939 event pairs, 877 based on Foata normal form. 1/6762 useless extension candidates. Maximal degree in co-relation 64922. Up to 5989 conditions per place. [2024-06-03 20:45:33,550 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 635 selfloop transitions, 128 changer transitions 0/769 dead transitions. [2024-06-03 20:45:33,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 769 transitions, 17118 flow [2024-06-03 20:45:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:45:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:45:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-03 20:45:33,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-03 20:45:33,552 INFO L175 Difference]: Start difference. First operand has 503 places, 732 transitions, 14924 flow. Second operand 12 states and 247 transitions. [2024-06-03 20:45:33,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 769 transitions, 17118 flow [2024-06-03 20:45:37,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 769 transitions, 16907 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:45:37,807 INFO L231 Difference]: Finished difference. Result has 507 places, 735 transitions, 15061 flow [2024-06-03 20:45:37,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14719, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15061, PETRI_PLACES=507, PETRI_TRANSITIONS=735} [2024-06-03 20:45:37,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-03 20:45:37,808 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 735 transitions, 15061 flow [2024-06-03 20:45:37,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:37,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:37,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:37,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:45:37,809 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)] === [2024-06-03 20:45:37,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1008058893, now seen corresponding path program 15 times [2024-06-03 20:45:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:37,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137883080] [2024-06-03 20:45:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:38,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:38,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137883080] [2024-06-03 20:45:38,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137883080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:38,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:38,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:45:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565889528] [2024-06-03 20:45:38,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:38,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:45:38,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:45:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:45:38,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:45:38,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 735 transitions, 15061 flow. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:38,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:38,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:45:38,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:40,208 INFO L124 PetriNetUnfolderBase]: 4069/6784 cut-off events. [2024-06-03 20:45:40,209 INFO L125 PetriNetUnfolderBase]: For 990889/990889 co-relation queries the response was YES. [2024-06-03 20:45:40,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65665 conditions, 6784 events. 4069/6784 cut-off events. For 990889/990889 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46109 event pairs, 877 based on Foata normal form. 1/6784 useless extension candidates. Maximal degree in co-relation 65434. Up to 6004 conditions per place. [2024-06-03 20:45:40,336 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 630 selfloop transitions, 136 changer transitions 0/772 dead transitions. [2024-06-03 20:45:40,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 772 transitions, 17337 flow [2024-06-03 20:45:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:45:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:45:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-03 20:45:40,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-03 20:45:40,338 INFO L175 Difference]: Start difference. First operand has 507 places, 735 transitions, 15061 flow. Second operand 12 states and 244 transitions. [2024-06-03 20:45:40,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 772 transitions, 17337 flow [2024-06-03 20:45:44,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 772 transitions, 17065 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-03 20:45:44,521 INFO L231 Difference]: Finished difference. Result has 510 places, 741 transitions, 15239 flow [2024-06-03 20:45:44,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14801, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15239, PETRI_PLACES=510, PETRI_TRANSITIONS=741} [2024-06-03 20:45:44,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-03 20:45:44,522 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 741 transitions, 15239 flow [2024-06-03 20:45:44,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:44,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:44,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:44,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:45:44,522 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)] === [2024-06-03 20:45:44,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1656074233, now seen corresponding path program 16 times [2024-06-03 20:45:44,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:44,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025511525] [2024-06-03 20:45:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:44,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:44,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:44,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025511525] [2024-06-03 20:45:44,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025511525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:44,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:44,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:45:44,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867661142] [2024-06-03 20:45:44,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:44,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:45:44,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:44,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:45:44,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:45:44,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:45:44,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 741 transitions, 15239 flow. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:44,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:44,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:45:44,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:46,842 INFO L124 PetriNetUnfolderBase]: 4074/6797 cut-off events. [2024-06-03 20:45:46,843 INFO L125 PetriNetUnfolderBase]: For 1007126/1007126 co-relation queries the response was YES. [2024-06-03 20:45:46,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65911 conditions, 6797 events. 4074/6797 cut-off events. For 1007126/1007126 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 46261 event pairs, 879 based on Foata normal form. 1/6797 useless extension candidates. Maximal degree in co-relation 65679. Up to 6010 conditions per place. [2024-06-03 20:45:46,959 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 634 selfloop transitions, 138 changer transitions 0/778 dead transitions. [2024-06-03 20:45:46,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 778 transitions, 17237 flow [2024-06-03 20:45:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:45:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:45:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-03 20:45:46,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-03 20:45:46,961 INFO L175 Difference]: Start difference. First operand has 510 places, 741 transitions, 15239 flow. Second operand 13 states and 263 transitions. [2024-06-03 20:45:46,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 778 transitions, 17237 flow [2024-06-03 20:45:51,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 778 transitions, 17034 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:45:51,075 INFO L231 Difference]: Finished difference. Result has 515 places, 744 transitions, 15404 flow [2024-06-03 20:45:51,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15039, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15404, PETRI_PLACES=515, PETRI_TRANSITIONS=744} [2024-06-03 20:45:51,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-03 20:45:51,076 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 744 transitions, 15404 flow [2024-06-03 20:45:51,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:51,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:51,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:51,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:45:51,077 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)] === [2024-06-03 20:45:51,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1007707353, now seen corresponding path program 17 times [2024-06-03 20:45:51,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:51,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278917757] [2024-06-03 20:45:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:51,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:51,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278917757] [2024-06-03 20:45:51,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278917757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:51,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:51,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:45:51,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711409921] [2024-06-03 20:45:51,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:51,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:45:51,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:45:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:45:51,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:45:51,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 744 transitions, 15404 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:51,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:51,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:45:51,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:53,456 INFO L124 PetriNetUnfolderBase]: 4071/6805 cut-off events. [2024-06-03 20:45:53,456 INFO L125 PetriNetUnfolderBase]: For 1018210/1018210 co-relation queries the response was YES. [2024-06-03 20:45:53,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65968 conditions, 6805 events. 4071/6805 cut-off events. For 1018210/1018210 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 46399 event pairs, 889 based on Foata normal form. 1/6805 useless extension candidates. Maximal degree in co-relation 65735. Up to 6007 conditions per place. [2024-06-03 20:45:53,574 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 637 selfloop transitions, 138 changer transitions 0/781 dead transitions. [2024-06-03 20:45:53,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 781 transitions, 17554 flow [2024-06-03 20:45:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:45:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:45:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 296 transitions. [2024-06-03 20:45:53,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813008130081301 [2024-06-03 20:45:53,575 INFO L175 Difference]: Start difference. First operand has 515 places, 744 transitions, 15404 flow. Second operand 15 states and 296 transitions. [2024-06-03 20:45:53,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 781 transitions, 17554 flow [2024-06-03 20:45:57,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 781 transitions, 17360 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:45:57,907 INFO L231 Difference]: Finished difference. Result has 522 places, 744 transitions, 15492 flow [2024-06-03 20:45:57,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15210, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15492, PETRI_PLACES=522, PETRI_TRANSITIONS=744} [2024-06-03 20:45:57,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-03 20:45:57,910 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 744 transitions, 15492 flow [2024-06-03 20:45:57,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:57,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:57,910 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] [2024-06-03 20:45:57,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:45:57,911 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)] === [2024-06-03 20:45:57,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1655722693, now seen corresponding path program 18 times [2024-06-03 20:45:57,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:57,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043422522] [2024-06-03 20:45:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:57,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:58,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:58,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043422522] [2024-06-03 20:45:58,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043422522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:58,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:58,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:45:58,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769461596] [2024-06-03 20:45:58,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:58,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:45:58,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:58,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:45:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:45:58,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-03 20:45:58,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 744 transitions, 15492 flow. Second operand has 12 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:58,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:58,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-03 20:45:58,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:00,342 INFO L124 PetriNetUnfolderBase]: 4068/6780 cut-off events. [2024-06-03 20:46:00,343 INFO L125 PetriNetUnfolderBase]: For 1029680/1029680 co-relation queries the response was YES. [2024-06-03 20:46:00,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65983 conditions, 6780 events. 4068/6780 cut-off events. For 1029680/1029680 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 46057 event pairs, 877 based on Foata normal form. 1/6780 useless extension candidates. Maximal degree in co-relation 65749. Up to 6004 conditions per place. [2024-06-03 20:46:00,460 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 635 selfloop transitions, 137 changer transitions 0/778 dead transitions. [2024-06-03 20:46:00,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 778 transitions, 17408 flow [2024-06-03 20:46:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:46:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:46:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-03 20:46:00,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904315196998125 [2024-06-03 20:46:00,461 INFO L175 Difference]: Start difference. First operand has 522 places, 744 transitions, 15492 flow. Second operand 13 states and 250 transitions. [2024-06-03 20:46:00,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 778 transitions, 17408 flow [2024-06-03 20:46:05,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 778 transitions, 17065 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 20:46:05,519 INFO L231 Difference]: Finished difference. Result has 523 places, 744 transitions, 15429 flow [2024-06-03 20:46:05,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15149, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15429, PETRI_PLACES=523, PETRI_TRANSITIONS=744} [2024-06-03 20:46:05,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-03 20:46:05,519 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 744 transitions, 15429 flow [2024-06-03 20:46:05,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:05,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:05,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:05,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:46:05,520 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)] === [2024-06-03 20:46:05,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:05,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1655906833, now seen corresponding path program 19 times [2024-06-03 20:46:05,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:05,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141766096] [2024-06-03 20:46:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:05,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:05,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:05,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141766096] [2024-06-03 20:46:05,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141766096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:05,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:05,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:46:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275836081] [2024-06-03 20:46:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:05,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:46:05,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:46:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:46:05,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:46:05,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 744 transitions, 15429 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:05,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:05,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:46:05,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:08,073 INFO L124 PetriNetUnfolderBase]: 4065/6792 cut-off events. [2024-06-03 20:46:08,074 INFO L125 PetriNetUnfolderBase]: For 1038270/1038270 co-relation queries the response was YES. [2024-06-03 20:46:08,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65936 conditions, 6792 events. 4065/6792 cut-off events. For 1038270/1038270 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 46250 event pairs, 889 based on Foata normal form. 1/6792 useless extension candidates. Maximal degree in co-relation 65701. Up to 6001 conditions per place. [2024-06-03 20:46:08,193 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 631 selfloop transitions, 139 changer transitions 0/776 dead transitions. [2024-06-03 20:46:08,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 776 transitions, 17111 flow [2024-06-03 20:46:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:46:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:46:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-03 20:46:08,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:46:08,194 INFO L175 Difference]: Start difference. First operand has 523 places, 744 transitions, 15429 flow. Second operand 12 states and 246 transitions. [2024-06-03 20:46:08,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 776 transitions, 17111 flow [2024-06-03 20:46:12,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 776 transitions, 16829 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-03 20:46:12,837 INFO L231 Difference]: Finished difference. Result has 523 places, 744 transitions, 15431 flow [2024-06-03 20:46:12,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15147, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15431, PETRI_PLACES=523, PETRI_TRANSITIONS=744} [2024-06-03 20:46:12,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-03 20:46:12,838 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 744 transitions, 15431 flow [2024-06-03 20:46:12,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:12,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:12,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:12,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:46:12,839 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)] === [2024-06-03 20:46:12,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -205814665, now seen corresponding path program 20 times [2024-06-03 20:46:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:12,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502221508] [2024-06-03 20:46:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:13,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:13,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502221508] [2024-06-03 20:46:13,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502221508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:13,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:13,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:46:13,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409996458] [2024-06-03 20:46:13,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:46:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:46:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:46:13,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:13,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 744 transitions, 15431 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:13,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:13,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:13,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:15,200 INFO L124 PetriNetUnfolderBase]: 4094/6825 cut-off events. [2024-06-03 20:46:15,201 INFO L125 PetriNetUnfolderBase]: For 1076148/1076148 co-relation queries the response was YES. [2024-06-03 20:46:15,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66865 conditions, 6825 events. 4094/6825 cut-off events. For 1076148/1076148 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 46414 event pairs, 882 based on Foata normal form. 1/6818 useless extension candidates. Maximal degree in co-relation 66629. Up to 5405 conditions per place. [2024-06-03 20:46:15,322 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 465 changer transitions 0/781 dead transitions. [2024-06-03 20:46:15,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 781 transitions, 17799 flow [2024-06-03 20:46:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:46:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:46:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:46:15,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:46:15,323 INFO L175 Difference]: Start difference. First operand has 523 places, 744 transitions, 15431 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:46:15,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 781 transitions, 17799 flow [2024-06-03 20:46:20,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 781 transitions, 17470 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 20:46:20,190 INFO L231 Difference]: Finished difference. Result has 523 places, 756 transitions, 16317 flow [2024-06-03 20:46:20,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15102, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16317, PETRI_PLACES=523, PETRI_TRANSITIONS=756} [2024-06-03 20:46:20,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-03 20:46:20,191 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 756 transitions, 16317 flow [2024-06-03 20:46:20,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:20,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:20,191 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] [2024-06-03 20:46:20,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:46:20,192 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)] === [2024-06-03 20:46:20,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1122080569, now seen corresponding path program 21 times [2024-06-03 20:46:20,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:20,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803379445] [2024-06-03 20:46:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:20,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:20,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:20,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803379445] [2024-06-03 20:46:20,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803379445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:20,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:20,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:46:20,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555519542] [2024-06-03 20:46:20,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:20,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:46:20,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:20,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:46:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:46:20,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:20,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 756 transitions, 16317 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:20,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:20,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:20,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:22,546 INFO L124 PetriNetUnfolderBase]: 4115/6864 cut-off events. [2024-06-03 20:46:22,547 INFO L125 PetriNetUnfolderBase]: For 1110380/1110380 co-relation queries the response was YES. [2024-06-03 20:46:22,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68457 conditions, 6864 events. 4115/6864 cut-off events. For 1110380/1110380 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 46700 event pairs, 884 based on Foata normal form. 1/6857 useless extension candidates. Maximal degree in co-relation 68221. Up to 5429 conditions per place. [2024-06-03 20:46:22,673 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 318 selfloop transitions, 465 changer transitions 0/789 dead transitions. [2024-06-03 20:46:22,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 789 transitions, 18863 flow [2024-06-03 20:46:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:46:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:46:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-03 20:46:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-03 20:46:22,674 INFO L175 Difference]: Start difference. First operand has 523 places, 756 transitions, 16317 flow. Second operand 12 states and 254 transitions. [2024-06-03 20:46:22,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 789 transitions, 18863 flow [2024-06-03 20:46:27,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 789 transitions, 17798 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-03 20:46:27,391 INFO L231 Difference]: Finished difference. Result has 526 places, 765 transitions, 16409 flow [2024-06-03 20:46:27,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15304, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16409, PETRI_PLACES=526, PETRI_TRANSITIONS=765} [2024-06-03 20:46:27,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-03 20:46:27,391 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 765 transitions, 16409 flow [2024-06-03 20:46:27,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:27,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:27,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:27,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:46:27,392 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)] === [2024-06-03 20:46:27,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash 835769839, now seen corresponding path program 22 times [2024-06-03 20:46:27,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:27,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540106376] [2024-06-03 20:46:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:27,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:27,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:27,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540106376] [2024-06-03 20:46:27,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540106376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:27,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:27,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:46:27,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028706723] [2024-06-03 20:46:27,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:27,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:46:27,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:46:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:46:27,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:27,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 765 transitions, 16409 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:27,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:27,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:27,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:29,864 INFO L124 PetriNetUnfolderBase]: 4112/6856 cut-off events. [2024-06-03 20:46:29,865 INFO L125 PetriNetUnfolderBase]: For 1102584/1102584 co-relation queries the response was YES. [2024-06-03 20:46:29,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68153 conditions, 6856 events. 4112/6856 cut-off events. For 1102584/1102584 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 46685 event pairs, 882 based on Foata normal form. 1/6849 useless extension candidates. Maximal degree in co-relation 67917. Up to 5426 conditions per place. [2024-06-03 20:46:29,988 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 477 changer transitions 0/795 dead transitions. [2024-06-03 20:46:29,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 795 transitions, 18553 flow [2024-06-03 20:46:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:46:29,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:46:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-03 20:46:29,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140712945590994 [2024-06-03 20:46:29,989 INFO L175 Difference]: Start difference. First operand has 526 places, 765 transitions, 16409 flow. Second operand 13 states and 274 transitions. [2024-06-03 20:46:29,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 795 transitions, 18553 flow [2024-06-03 20:46:35,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 795 transitions, 17770 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 20:46:35,192 INFO L231 Difference]: Finished difference. Result has 531 places, 765 transitions, 16595 flow [2024-06-03 20:46:35,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15630, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16595, PETRI_PLACES=531, PETRI_TRANSITIONS=765} [2024-06-03 20:46:35,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-03 20:46:35,193 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 765 transitions, 16595 flow [2024-06-03 20:46:35,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:35,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:35,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:35,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:46:35,194 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)] === [2024-06-03 20:46:35,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:35,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1746359941, now seen corresponding path program 23 times [2024-06-03 20:46:35,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:35,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206618364] [2024-06-03 20:46:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:35,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:35,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:35,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206618364] [2024-06-03 20:46:35,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206618364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:35,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:35,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:46:35,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967997658] [2024-06-03 20:46:35,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:35,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:46:35,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:35,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:46:35,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:46:35,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:35,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 765 transitions, 16595 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:35,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:35,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:35,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:37,809 INFO L124 PetriNetUnfolderBase]: 4125/6873 cut-off events. [2024-06-03 20:46:37,809 INFO L125 PetriNetUnfolderBase]: For 1110871/1110871 co-relation queries the response was YES. [2024-06-03 20:46:37,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68608 conditions, 6873 events. 4125/6873 cut-off events. For 1110871/1110871 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 46767 event pairs, 882 based on Foata normal form. 1/6866 useless extension candidates. Maximal degree in co-relation 68372. Up to 5441 conditions per place. [2024-06-03 20:46:37,939 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 483 changer transitions 0/799 dead transitions. [2024-06-03 20:46:37,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 799 transitions, 18881 flow [2024-06-03 20:46:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:46:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:46:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 287 transitions. [2024-06-03 20:46:37,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:46:37,940 INFO L175 Difference]: Start difference. First operand has 531 places, 765 transitions, 16595 flow. Second operand 14 states and 287 transitions. [2024-06-03 20:46:37,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 799 transitions, 18881 flow [2024-06-03 20:46:42,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 799 transitions, 17695 flow, removed 44 selfloop flow, removed 13 redundant places. [2024-06-03 20:46:42,688 INFO L231 Difference]: Finished difference. Result has 532 places, 771 transitions, 16535 flow [2024-06-03 20:46:42,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15453, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16535, PETRI_PLACES=532, PETRI_TRANSITIONS=771} [2024-06-03 20:46:42,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-03 20:46:42,689 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 771 transitions, 16535 flow [2024-06-03 20:46:42,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:42,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:42,690 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, 1] [2024-06-03 20:46:42,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:46:42,690 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)] === [2024-06-03 20:46:42,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:42,690 INFO L85 PathProgramCache]: Analyzing trace with hash 839488909, now seen corresponding path program 24 times [2024-06-03 20:46:42,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:42,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481010155] [2024-06-03 20:46:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:42,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:43,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:43,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481010155] [2024-06-03 20:46:43,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481010155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:43,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:43,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:46:43,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069062641] [2024-06-03 20:46:43,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:43,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:46:43,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:43,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:46:43,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:46:43,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:43,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 771 transitions, 16535 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:43,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:43,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:43,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:45,155 INFO L124 PetriNetUnfolderBase]: 4122/6881 cut-off events. [2024-06-03 20:46:45,155 INFO L125 PetriNetUnfolderBase]: For 1102614/1102614 co-relation queries the response was YES. [2024-06-03 20:46:45,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68260 conditions, 6881 events. 4122/6881 cut-off events. For 1102614/1102614 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 46873 event pairs, 892 based on Foata normal form. 1/6874 useless extension candidates. Maximal degree in co-relation 68024. Up to 5438 conditions per place. [2024-06-03 20:46:45,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 309 selfloop transitions, 483 changer transitions 0/798 dead transitions. [2024-06-03 20:46:45,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 798 transitions, 18439 flow [2024-06-03 20:46:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:46:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:46:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 286 transitions. [2024-06-03 20:46:45,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-03 20:46:45,290 INFO L175 Difference]: Start difference. First operand has 532 places, 771 transitions, 16535 flow. Second operand 14 states and 286 transitions. [2024-06-03 20:46:45,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 798 transitions, 18439 flow [2024-06-03 20:46:50,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 798 transitions, 17663 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-03 20:46:50,529 INFO L231 Difference]: Finished difference. Result has 535 places, 771 transitions, 16738 flow [2024-06-03 20:46:50,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15761, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16738, PETRI_PLACES=535, PETRI_TRANSITIONS=771} [2024-06-03 20:46:50,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-03 20:46:50,530 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 771 transitions, 16738 flow [2024-06-03 20:46:50,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:50,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:50,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:50,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:46:50,531 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)] === [2024-06-03 20:46:50,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:50,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1161955483, now seen corresponding path program 25 times [2024-06-03 20:46:50,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:50,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284776679] [2024-06-03 20:46:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:50,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:50,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284776679] [2024-06-03 20:46:50,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284776679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:50,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:50,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:46:50,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309096242] [2024-06-03 20:46:50,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:50,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:46:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:46:50,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:46:50,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:50,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 771 transitions, 16738 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:50,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:50,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:50,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:53,024 INFO L124 PetriNetUnfolderBase]: 4119/6874 cut-off events. [2024-06-03 20:46:53,024 INFO L125 PetriNetUnfolderBase]: For 1097509/1097509 co-relation queries the response was YES. [2024-06-03 20:46:53,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68243 conditions, 6874 events. 4119/6874 cut-off events. For 1097509/1097509 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 46902 event pairs, 884 based on Foata normal form. 1/6867 useless extension candidates. Maximal degree in co-relation 68007. Up to 5435 conditions per place. [2024-06-03 20:46:53,147 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 316 selfloop transitions, 469 changer transitions 0/791 dead transitions. [2024-06-03 20:46:53,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 791 transitions, 18606 flow [2024-06-03 20:46:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:46:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:46:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-03 20:46:53,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-03 20:46:53,149 INFO L175 Difference]: Start difference. First operand has 535 places, 771 transitions, 16738 flow. Second operand 10 states and 218 transitions. [2024-06-03 20:46:53,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 791 transitions, 18606 flow [2024-06-03 20:46:58,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 791 transitions, 17624 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-03 20:46:58,136 INFO L231 Difference]: Finished difference. Result has 531 places, 771 transitions, 16706 flow [2024-06-03 20:46:58,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15758, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16706, PETRI_PLACES=531, PETRI_TRANSITIONS=771} [2024-06-03 20:46:58,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-03 20:46:58,137 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 771 transitions, 16706 flow [2024-06-03 20:46:58,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:58,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:58,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:58,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:46:58,137 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)] === [2024-06-03 20:46:58,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:58,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1459113910, now seen corresponding path program 5 times [2024-06-03 20:46:58,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:58,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268643898] [2024-06-03 20:46:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:58,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:58,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:58,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268643898] [2024-06-03 20:46:58,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268643898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:58,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:58,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:46:58,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784875225] [2024-06-03 20:46:58,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:58,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:46:58,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:58,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:46:58,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:46:58,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:58,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 771 transitions, 16706 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:58,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:58,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:58,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:00,731 INFO L124 PetriNetUnfolderBase]: 4155/6919 cut-off events. [2024-06-03 20:47:00,731 INFO L125 PetriNetUnfolderBase]: For 1163017/1163017 co-relation queries the response was YES. [2024-06-03 20:47:00,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68855 conditions, 6919 events. 4155/6919 cut-off events. For 1163017/1163017 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 47064 event pairs, 884 based on Foata normal form. 10/6921 useless extension candidates. Maximal degree in co-relation 68619. Up to 5790 conditions per place. [2024-06-03 20:47:00,867 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 549 selfloop transitions, 241 changer transitions 0/796 dead transitions. [2024-06-03 20:47:00,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 796 transitions, 18458 flow [2024-06-03 20:47:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-03 20:47:00,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-03 20:47:00,868 INFO L175 Difference]: Start difference. First operand has 531 places, 771 transitions, 16706 flow. Second operand 10 states and 221 transitions. [2024-06-03 20:47:00,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 796 transitions, 18458 flow [2024-06-03 20:47:06,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 796 transitions, 17514 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-03 20:47:06,430 INFO L231 Difference]: Finished difference. Result has 531 places, 773 transitions, 16333 flow [2024-06-03 20:47:06,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15762, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16333, PETRI_PLACES=531, PETRI_TRANSITIONS=773} [2024-06-03 20:47:06,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-03 20:47:06,431 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 773 transitions, 16333 flow [2024-06-03 20:47:06,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:06,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:06,431 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] [2024-06-03 20:47:06,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:47:06,432 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)] === [2024-06-03 20:47:06,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1962659801, now seen corresponding path program 26 times [2024-06-03 20:47:06,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:06,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938809675] [2024-06-03 20:47:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:06,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:06,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:06,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938809675] [2024-06-03 20:47:06,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938809675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:06,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:06,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:47:06,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287067001] [2024-06-03 20:47:06,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:06,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:47:06,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:06,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:47:06,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:47:06,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:06,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 773 transitions, 16333 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:06,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:06,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:06,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:09,010 INFO L124 PetriNetUnfolderBase]: 4168/6948 cut-off events. [2024-06-03 20:47:09,010 INFO L125 PetriNetUnfolderBase]: For 1108263/1108263 co-relation queries the response was YES. [2024-06-03 20:47:09,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68835 conditions, 6948 events. 4168/6948 cut-off events. For 1108263/1108263 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 47391 event pairs, 886 based on Foata normal form. 1/6941 useless extension candidates. Maximal degree in co-relation 68599. Up to 5506 conditions per place. [2024-06-03 20:47:09,139 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 482 changer transitions 0/807 dead transitions. [2024-06-03 20:47:09,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 807 transitions, 18825 flow [2024-06-03 20:47:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-03 20:47:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-03 20:47:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 322 transitions. [2024-06-03 20:47:09,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-03 20:47:09,141 INFO L175 Difference]: Start difference. First operand has 531 places, 773 transitions, 16333 flow. Second operand 16 states and 322 transitions. [2024-06-03 20:47:09,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 807 transitions, 18825 flow [2024-06-03 20:47:14,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 807 transitions, 18302 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:14,297 INFO L231 Difference]: Finished difference. Result has 539 places, 779 transitions, 16896 flow [2024-06-03 20:47:14,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15810, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=16896, PETRI_PLACES=539, PETRI_TRANSITIONS=779} [2024-06-03 20:47:14,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 497 predicate places. [2024-06-03 20:47:14,298 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 779 transitions, 16896 flow [2024-06-03 20:47:14,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:14,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:14,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:47:14,299 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)] === [2024-06-03 20:47:14,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1459305211, now seen corresponding path program 27 times [2024-06-03 20:47:14,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:14,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586264777] [2024-06-03 20:47:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:14,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:14,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:14,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586264777] [2024-06-03 20:47:14,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586264777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:14,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:14,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:47:14,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868100565] [2024-06-03 20:47:14,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:14,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:47:14,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:14,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:47:14,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:47:14,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:14,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 779 transitions, 16896 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:14,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:14,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:16,866 INFO L124 PetriNetUnfolderBase]: 4173/6977 cut-off events. [2024-06-03 20:47:16,866 INFO L125 PetriNetUnfolderBase]: For 1124209/1124209 co-relation queries the response was YES. [2024-06-03 20:47:16,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69212 conditions, 6977 events. 4173/6977 cut-off events. For 1124209/1124209 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 47792 event pairs, 900 based on Foata normal form. 1/6970 useless extension candidates. Maximal degree in co-relation 68975. Up to 5512 conditions per place. [2024-06-03 20:47:16,993 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 316 selfloop transitions, 486 changer transitions 0/808 dead transitions. [2024-06-03 20:47:16,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 808 transitions, 19342 flow [2024-06-03 20:47:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:47:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:47:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 292 transitions. [2024-06-03 20:47:16,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-03 20:47:16,995 INFO L175 Difference]: Start difference. First operand has 539 places, 779 transitions, 16896 flow. Second operand 14 states and 292 transitions. [2024-06-03 20:47:16,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 808 transitions, 19342 flow [2024-06-03 20:47:22,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 808 transitions, 18563 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-06-03 20:47:22,578 INFO L231 Difference]: Finished difference. Result has 541 places, 782 transitions, 17168 flow [2024-06-03 20:47:22,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16126, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17168, PETRI_PLACES=541, PETRI_TRANSITIONS=782} [2024-06-03 20:47:22,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-03 20:47:22,579 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 782 transitions, 17168 flow [2024-06-03 20:47:22,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:22,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:22,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:22,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:47:22,579 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)] === [2024-06-03 20:47:22,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1126376239, now seen corresponding path program 28 times [2024-06-03 20:47:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:22,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154463207] [2024-06-03 20:47:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:22,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154463207] [2024-06-03 20:47:22,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154463207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:22,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:22,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:47:22,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524869012] [2024-06-03 20:47:22,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:22,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:47:22,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:47:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:47:22,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:22,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 782 transitions, 17168 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:22,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:22,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:22,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:25,369 INFO L124 PetriNetUnfolderBase]: 4170/6948 cut-off events. [2024-06-03 20:47:25,369 INFO L125 PetriNetUnfolderBase]: For 1119385/1119385 co-relation queries the response was YES. [2024-06-03 20:47:25,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69160 conditions, 6948 events. 4170/6948 cut-off events. For 1119385/1119385 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 47358 event pairs, 886 based on Foata normal form. 1/6941 useless extension candidates. Maximal degree in co-relation 68923. Up to 5509 conditions per place. [2024-06-03 20:47:25,512 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 316 selfloop transitions, 485 changer transitions 0/807 dead transitions. [2024-06-03 20:47:25,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 807 transitions, 19314 flow [2024-06-03 20:47:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:47:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:47:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 287 transitions. [2024-06-03 20:47:25,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:47:25,514 INFO L175 Difference]: Start difference. First operand has 541 places, 782 transitions, 17168 flow. Second operand 14 states and 287 transitions. [2024-06-03 20:47:25,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 807 transitions, 19314 flow [2024-06-03 20:47:30,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 807 transitions, 17903 flow, removed 23 selfloop flow, removed 14 redundant places. [2024-06-03 20:47:30,874 INFO L231 Difference]: Finished difference. Result has 541 places, 782 transitions, 16742 flow [2024-06-03 20:47:30,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15761, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16742, PETRI_PLACES=541, PETRI_TRANSITIONS=782} [2024-06-03 20:47:30,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-03 20:47:30,875 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 782 transitions, 16742 flow [2024-06-03 20:47:30,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:30,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:30,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:30,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:47:30,876 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)] === [2024-06-03 20:47:30,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:30,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1126560379, now seen corresponding path program 29 times [2024-06-03 20:47:30,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:30,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147410123] [2024-06-03 20:47:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:30,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:31,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147410123] [2024-06-03 20:47:31,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147410123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:31,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:31,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:47:31,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351740343] [2024-06-03 20:47:31,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:31,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:47:31,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:47:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:47:31,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:31,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 782 transitions, 16742 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:31,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:31,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:31,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand