./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_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/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe009_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-cde23df-m [2024-06-14 13:52:21,065 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:52:21,126 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:52:21,135 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:52:21,136 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:52:21,166 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:52:21,167 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:52:21,167 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:52:21,168 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:52:21,172 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:52:21,172 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:52:21,172 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:52:21,173 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:52:21,174 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:52:21,174 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:52:21,175 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:52:21,175 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:52:21,175 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:52:21,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:52:21,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:52:21,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:52:21,176 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:52:21,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:52:21,177 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:52:21,177 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:52:21,177 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:52:21,178 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:52:21,178 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:52:21,178 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:52:21,179 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:52:21,180 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:52:21,180 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:52:21,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:52:21,180 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:52:21,181 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:52:21,181 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:52:21,181 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:52:21,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:52:21,181 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:52:21,181 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:52:21,182 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:52:21,182 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:52:21,182 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:52:21,182 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:52:21,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:52:21,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:52:21,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:52:21,521 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:52:21,522 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:52:21,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 13:52:22,705 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:52:22,957 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:52:22,957 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 13:52:22,976 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f26980dde/78bb967b70854da19693b3d4b9afb5c9/FLAGdb7fd6634 [2024-06-14 13:52:22,988 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f26980dde/78bb967b70854da19693b3d4b9afb5c9 [2024-06-14 13:52:22,990 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:52:22,991 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:52:22,991 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 13:52:23,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:52:23,112 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:52:23,114 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:52:23,114 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:52:23,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:52:23,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:52:22" (1/2) ... [2024-06-14 13:52:23,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d0bc6b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:52:23, skipping insertion in model container [2024-06-14 13:52:23,120 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:52:22" (1/2) ... [2024-06-14 13:52:23,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20b2ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:52:23, skipping insertion in model container [2024-06-14 13:52:23,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:52:23" (2/2) ... [2024-06-14 13:52:23,124 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d0bc6b5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23, skipping insertion in model container [2024-06-14 13:52:23,124 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:52:23" (2/2) ... [2024-06-14 13:52:23,124 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:52:23,173 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:52:23,178 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_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) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && x <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:52:23,178 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && x <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:52:23,178 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_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) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && x <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:52:23,178 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:52:23,179 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-14 13:52:23,221 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:52:23,573 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:52:23,580 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:52:23,699 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:52:23,736 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:52:23,736 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23 WrapperNode [2024-06-14 13:52:23,736 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:52:23,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:52:23,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:52:23,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:52:23,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,809 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 13:52:23,810 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:52:23,811 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:52:23,812 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:52:23,812 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:52:23,822 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,829 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,854 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 13:52:23,854 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,872 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,877 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,878 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,883 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:52:23,886 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:52:23,887 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:52:23,887 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:52:23,887 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (1/1) ... [2024-06-14 13:52:23,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:52:23,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:52:23,954 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:52:23,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:52:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:52:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:52:24,037 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:52:24,037 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:52:24,037 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:52:24,037 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:52:24,038 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:52:24,038 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:52:24,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:52:24,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:52:24,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:52:24,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:52:24,040 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:52:24,176 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:52:24,179 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:52:24,462 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:52:24,462 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:52:24,552 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:52:24,552 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:52:24,552 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:52:24 BoogieIcfgContainer [2024-06-14 13:52:24,553 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:52:24,554 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:52:24,554 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:52:24,559 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:52:24,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:52:22" (1/4) ... [2024-06-14 13:52:24,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a3479b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:52:24, skipping insertion in model container [2024-06-14 13:52:24,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:52:23" (2/4) ... [2024-06-14 13:52:24,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a3479b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:52:24, skipping insertion in model container [2024-06-14 13:52:24,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:23" (3/4) ... [2024-06-14 13:52:24,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a3479b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:52:24, skipping insertion in model container [2024-06-14 13:52:24,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:52:24" (4/4) ... [2024-06-14 13:52:24,564 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 13:52:24,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:52:24,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:52:24,582 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:52:24,641 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:52:24,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 13:52:24,719 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-14 13:52:24,720 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:52:24,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:52:24,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 13:52:24,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-14 13:52:24,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:52:24,743 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;@7427a98b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:52:24,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:52:24,747 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:52:24,748 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:52:24,748 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:52:24,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:24,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:52:24,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:24,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1909711783, now seen corresponding path program 1 times [2024-06-14 13:52:24,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:24,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635026000] [2024-06-14 13:52:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:24,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:25,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:25,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635026000] [2024-06-14 13:52:25,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635026000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:25,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:25,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:52:25,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319839012] [2024-06-14 13:52:25,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:25,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:52:25,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:52:25,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:52:25,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-14 13:52:25,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:25,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-14 13:52:25,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:25,924 INFO L124 PetriNetUnfolderBase]: 471/808 cut-off events. [2024-06-14 13:52:25,924 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-14 13:52:25,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 808 events. 471/808 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3931 event pairs, 288 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-14 13:52:25,940 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 29 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-14 13:52:25,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 163 flow [2024-06-14 13:52:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:52:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:52:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-14 13:52:25,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-14 13:52:25,957 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 81 transitions. [2024-06-14 13:52:25,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 163 flow [2024-06-14 13:52:25,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:25,963 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-14 13:52:25,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-14 13:52:25,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-14 13:52:25,970 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-14 13:52:25,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:25,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:25,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:52:25,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:25,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1086635544, now seen corresponding path program 1 times [2024-06-14 13:52:25,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:25,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261388078] [2024-06-14 13:52:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:25,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:26,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:26,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261388078] [2024-06-14 13:52:26,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261388078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:26,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:26,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:26,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521756136] [2024-06-14 13:52:26,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:26,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:26,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:26,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:26,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:26,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:26,623 INFO L124 PetriNetUnfolderBase]: 754/1255 cut-off events. [2024-06-14 13:52:26,623 INFO L125 PetriNetUnfolderBase]: For 194/197 co-relation queries the response was YES. [2024-06-14 13:52:26,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2859 conditions, 1255 events. 754/1255 cut-off events. For 194/197 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6082 event pairs, 318 based on Foata normal form. 5/1258 useless extension candidates. Maximal degree in co-relation 2844. Up to 1124 conditions per place. [2024-06-14 13:52:26,632 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 13:52:26,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 254 flow [2024-06-14 13:52:26,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 13:52:26,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-14 13:52:26,635 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 101 transitions. [2024-06-14 13:52:26,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 254 flow [2024-06-14 13:52:26,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:26,637 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-14 13:52:26,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-14 13:52:26,638 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-14 13:52:26,638 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-14 13:52:26,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:26,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:26,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:52:26,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:26,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2108259387, now seen corresponding path program 1 times [2024-06-14 13:52:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:26,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731368908] [2024-06-14 13:52:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:26,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:26,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:26,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731368908] [2024-06-14 13:52:26,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731368908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:26,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:26,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:26,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974910885] [2024-06-14 13:52:26,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:26,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:26,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:26,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:26,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:26,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:26,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:27,142 INFO L124 PetriNetUnfolderBase]: 745/1240 cut-off events. [2024-06-14 13:52:27,143 INFO L125 PetriNetUnfolderBase]: For 582/593 co-relation queries the response was YES. [2024-06-14 13:52:27,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3173 conditions, 1240 events. 745/1240 cut-off events. For 582/593 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6014 event pairs, 218 based on Foata normal form. 14/1252 useless extension candidates. Maximal degree in co-relation 3155. Up to 1079 conditions per place. [2024-06-14 13:52:27,151 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-06-14 13:52:27,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 314 flow [2024-06-14 13:52:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:52:27,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 13:52:27,154 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:52:27,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 314 flow [2024-06-14 13:52:27,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 312 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:27,157 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 181 flow [2024-06-14 13:52:27,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-06-14 13:52:27,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-14 13:52:27,158 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 181 flow [2024-06-14 13:52:27,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:27,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:27,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:52:27,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:27,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:27,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2090825248, now seen corresponding path program 1 times [2024-06-14 13:52:27,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:27,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136146204] [2024-06-14 13:52:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:27,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:27,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:27,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136146204] [2024-06-14 13:52:27,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136146204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:27,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:27,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:27,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568650993] [2024-06-14 13:52:27,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:27,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:27,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:27,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:27,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:27,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:27,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:27,694 INFO L124 PetriNetUnfolderBase]: 747/1229 cut-off events. [2024-06-14 13:52:27,694 INFO L125 PetriNetUnfolderBase]: For 1101/1104 co-relation queries the response was YES. [2024-06-14 13:52:27,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3432 conditions, 1229 events. 747/1229 cut-off events. For 1101/1104 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5848 event pairs, 254 based on Foata normal form. 5/1229 useless extension candidates. Maximal degree in co-relation 3411. Up to 1105 conditions per place. [2024-06-14 13:52:27,705 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 13:52:27,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 393 flow [2024-06-14 13:52:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 13:52:27,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 13:52:27,709 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 181 flow. Second operand 4 states and 100 transitions. [2024-06-14 13:52:27,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 393 flow [2024-06-14 13:52:27,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 368 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:27,716 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-14 13:52:27,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-14 13:52:27,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-14 13:52:27,718 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-14 13:52:27,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:27,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:27,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:52:27,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:27,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash -104084423, now seen corresponding path program 1 times [2024-06-14 13:52:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:27,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889954806] [2024-06-14 13:52:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:28,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:28,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889954806] [2024-06-14 13:52:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889954806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:28,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:28,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671880176] [2024-06-14 13:52:28,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:28,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:28,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:28,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:28,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 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) [2024-06-14 13:52:28,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:28,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:28,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:28,378 INFO L124 PetriNetUnfolderBase]: 758/1286 cut-off events. [2024-06-14 13:52:28,379 INFO L125 PetriNetUnfolderBase]: For 1869/1886 co-relation queries the response was YES. [2024-06-14 13:52:28,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1286 events. 758/1286 cut-off events. For 1869/1886 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6349 event pairs, 280 based on Foata normal form. 14/1296 useless extension candidates. Maximal degree in co-relation 3988. Up to 1085 conditions per place. [2024-06-14 13:52:28,389 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-14 13:52:28,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 490 flow [2024-06-14 13:52:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 13:52:28,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-14 13:52:28,391 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 5 states and 123 transitions. [2024-06-14 13:52:28,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 490 flow [2024-06-14 13:52:28,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 484 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:28,396 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 317 flow [2024-06-14 13:52:28,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-14 13:52:28,397 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-14 13:52:28,397 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 317 flow [2024-06-14 13:52:28,398 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) [2024-06-14 13:52:28,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:28,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:52:28,398 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:28,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash -671905851, now seen corresponding path program 2 times [2024-06-14 13:52:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:28,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420908701] [2024-06-14 13:52:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:28,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:28,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:28,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420908701] [2024-06-14 13:52:28,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420908701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:28,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:28,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:28,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015123841] [2024-06-14 13:52:28,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:28,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:28,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:28,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:28,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:28,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:28,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:29,046 INFO L124 PetriNetUnfolderBase]: 753/1279 cut-off events. [2024-06-14 13:52:29,046 INFO L125 PetriNetUnfolderBase]: For 2782/2799 co-relation queries the response was YES. [2024-06-14 13:52:29,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 1279 events. 753/1279 cut-off events. For 2782/2799 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6309 event pairs, 280 based on Foata normal form. 14/1289 useless extension candidates. Maximal degree in co-relation 4309. Up to 1089 conditions per place. [2024-06-14 13:52:29,058 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 52 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-06-14 13:52:29,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 488 flow [2024-06-14 13:52:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 13:52:29,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-14 13:52:29,060 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 317 flow. Second operand 4 states and 101 transitions. [2024-06-14 13:52:29,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 488 flow [2024-06-14 13:52:29,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 457 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:29,067 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 324 flow [2024-06-14 13:52:29,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=324, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-14 13:52:29,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-14 13:52:29,069 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 324 flow [2024-06-14 13:52:29,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:29,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:29,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:52:29,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:29,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:29,070 INFO L85 PathProgramCache]: Analyzing trace with hash -671905665, now seen corresponding path program 1 times [2024-06-14 13:52:29,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:29,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857876174] [2024-06-14 13:52:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:29,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:29,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:29,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857876174] [2024-06-14 13:52:29,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857876174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:29,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:29,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:29,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112788049] [2024-06-14 13:52:29,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:29,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:29,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:29,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:29,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:29,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:29,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:29,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:29,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:29,640 INFO L124 PetriNetUnfolderBase]: 795/1325 cut-off events. [2024-06-14 13:52:29,640 INFO L125 PetriNetUnfolderBase]: For 3474/3491 co-relation queries the response was YES. [2024-06-14 13:52:29,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1325 events. 795/1325 cut-off events. For 3474/3491 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6472 event pairs, 253 based on Foata normal form. 15/1336 useless extension candidates. Maximal degree in co-relation 4652. Up to 1116 conditions per place. [2024-06-14 13:52:29,652 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 23 changer transitions 0/79 dead transitions. [2024-06-14 13:52:29,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 569 flow [2024-06-14 13:52:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:52:29,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 13:52:29,654 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 324 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:52:29,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 569 flow [2024-06-14 13:52:29,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 543 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:29,663 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 433 flow [2024-06-14 13:52:29,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=433, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2024-06-14 13:52:29,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-14 13:52:29,664 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 433 flow [2024-06-14 13:52:29,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:29,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:29,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:52:29,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:29,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1318642083, now seen corresponding path program 2 times [2024-06-14 13:52:29,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:29,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356303131] [2024-06-14 13:52:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:29,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:29,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:29,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356303131] [2024-06-14 13:52:29,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356303131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:29,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:29,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:29,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520317908] [2024-06-14 13:52:29,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:29,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:29,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:29,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:29,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:30,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:30,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 433 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:30,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:30,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:30,261 INFO L124 PetriNetUnfolderBase]: 805/1336 cut-off events. [2024-06-14 13:52:30,262 INFO L125 PetriNetUnfolderBase]: For 4888/4908 co-relation queries the response was YES. [2024-06-14 13:52:30,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5304 conditions, 1336 events. 805/1336 cut-off events. For 4888/4908 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6536 event pairs, 267 based on Foata normal form. 17/1343 useless extension candidates. Maximal degree in co-relation 5274. Up to 1092 conditions per place. [2024-06-14 13:52:30,277 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 57 selfloop transitions, 31 changer transitions 0/94 dead transitions. [2024-06-14 13:52:30,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 763 flow [2024-06-14 13:52:30,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 13:52:30,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 13:52:30,280 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 433 flow. Second operand 5 states and 124 transitions. [2024-06-14 13:52:30,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 763 flow [2024-06-14 13:52:30,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 732 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:30,293 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 584 flow [2024-06-14 13:52:30,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=584, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2024-06-14 13:52:30,294 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-14 13:52:30,295 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 584 flow [2024-06-14 13:52:30,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:30,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:30,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:52:30,296 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:30,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:30,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1318633155, now seen corresponding path program 1 times [2024-06-14 13:52:30,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:30,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792698757] [2024-06-14 13:52:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:30,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:30,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:30,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792698757] [2024-06-14 13:52:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792698757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:30,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:30,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966629361] [2024-06-14 13:52:30,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:30,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:30,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:30,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 584 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:30,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:30,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:30,870 INFO L124 PetriNetUnfolderBase]: 835/1397 cut-off events. [2024-06-14 13:52:30,870 INFO L125 PetriNetUnfolderBase]: For 5762/5771 co-relation queries the response was YES. [2024-06-14 13:52:30,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5898 conditions, 1397 events. 835/1397 cut-off events. For 5762/5771 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6927 event pairs, 242 based on Foata normal form. 18/1410 useless extension candidates. Maximal degree in co-relation 5865. Up to 1175 conditions per place. [2024-06-14 13:52:30,884 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 13 changer transitions 0/102 dead transitions. [2024-06-14 13:52:30,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 898 flow [2024-06-14 13:52:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 13:52:30,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-14 13:52:30,886 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 584 flow. Second operand 5 states and 123 transitions. [2024-06-14 13:52:30,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 898 flow [2024-06-14 13:52:30,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 862 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:30,896 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 608 flow [2024-06-14 13:52:30,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=608, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-14 13:52:30,897 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-14 13:52:30,897 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 608 flow [2024-06-14 13:52:30,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:30,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:30,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:52:30,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:30,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:30,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2655179, now seen corresponding path program 1 times [2024-06-14 13:52:30,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:30,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770405159] [2024-06-14 13:52:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:30,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:31,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:31,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770405159] [2024-06-14 13:52:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770405159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:31,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:31,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:52:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724173491] [2024-06-14 13:52:31,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:31,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:52:31,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:52:31,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:52:31,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 13:52:31,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 608 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:31,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 13:52:31,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:31,391 INFO L124 PetriNetUnfolderBase]: 760/1285 cut-off events. [2024-06-14 13:52:31,392 INFO L125 PetriNetUnfolderBase]: For 5927/5932 co-relation queries the response was YES. [2024-06-14 13:52:31,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1285 events. 760/1285 cut-off events. For 5927/5932 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6411 event pairs, 246 based on Foata normal form. 6/1270 useless extension candidates. Maximal degree in co-relation 5371. Up to 1115 conditions per place. [2024-06-14 13:52:31,405 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 66 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-06-14 13:52:31,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 803 flow [2024-06-14 13:52:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-14 13:52:31,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-14 13:52:31,407 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 608 flow. Second operand 4 states and 97 transitions. [2024-06-14 13:52:31,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 803 flow [2024-06-14 13:52:31,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 769 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:31,418 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 639 flow [2024-06-14 13:52:31,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=639, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-14 13:52:31,419 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-14 13:52:31,419 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 639 flow [2024-06-14 13:52:31,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:31,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:31,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:52:31,420 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:31,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:31,420 INFO L85 PathProgramCache]: Analyzing trace with hash -709873513, now seen corresponding path program 1 times [2024-06-14 13:52:31,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:31,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722221841] [2024-06-14 13:52:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:31,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:31,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722221841] [2024-06-14 13:52:31,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722221841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:31,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:31,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:31,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304187683] [2024-06-14 13:52:31,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:31,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:31,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:31,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:31,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:31,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:31,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 639 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:31,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:31,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:32,062 INFO L124 PetriNetUnfolderBase]: 886/1494 cut-off events. [2024-06-14 13:52:32,063 INFO L125 PetriNetUnfolderBase]: For 6900/6920 co-relation queries the response was YES. [2024-06-14 13:52:32,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1494 events. 886/1494 cut-off events. For 6900/6920 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7626 event pairs, 249 based on Foata normal form. 17/1507 useless extension candidates. Maximal degree in co-relation 6244. Up to 1152 conditions per place. [2024-06-14 13:52:32,078 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-14 13:52:32,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 1157 flow [2024-06-14 13:52:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 13:52:32,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-14 13:52:32,080 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 639 flow. Second operand 9 states and 211 transitions. [2024-06-14 13:52:32,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 1157 flow [2024-06-14 13:52:32,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 130 transitions, 1145 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:32,092 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 833 flow [2024-06-14 13:52:32,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=833, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-06-14 13:52:32,092 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-14 13:52:32,093 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 833 flow [2024-06-14 13:52:32,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:32,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:32,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:52:32,094 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:32,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:32,094 INFO L85 PathProgramCache]: Analyzing trace with hash 645761787, now seen corresponding path program 2 times [2024-06-14 13:52:32,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:32,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239766274] [2024-06-14 13:52:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:32,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:32,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:32,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239766274] [2024-06-14 13:52:32,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239766274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:32,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:32,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:32,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237840106] [2024-06-14 13:52:32,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:32,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:32,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:32,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:32,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:32,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:32,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 833 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) [2024-06-14 13:52:32,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:32,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:32,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:32,805 INFO L124 PetriNetUnfolderBase]: 912/1541 cut-off events. [2024-06-14 13:52:32,806 INFO L125 PetriNetUnfolderBase]: For 9503/9523 co-relation queries the response was YES. [2024-06-14 13:52:32,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 1541 events. 912/1541 cut-off events. For 9503/9523 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7935 event pairs, 250 based on Foata normal form. 17/1554 useless extension candidates. Maximal degree in co-relation 7149. Up to 1213 conditions per place. [2024-06-14 13:52:32,825 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 85 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-14 13:52:32,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1349 flow [2024-06-14 13:52:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:52:32,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-14 13:52:32,827 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 833 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:52:32,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1349 flow [2024-06-14 13:52:32,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1244 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:32,845 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 939 flow [2024-06-14 13:52:32,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=939, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-14 13:52:32,848 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-14 13:52:32,848 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 939 flow [2024-06-14 13:52:32,848 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) [2024-06-14 13:52:32,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:32,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:32,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:52:32,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:32,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash 645756207, now seen corresponding path program 3 times [2024-06-14 13:52:32,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:32,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839089663] [2024-06-14 13:52:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:32,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:33,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:33,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839089663] [2024-06-14 13:52:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839089663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:33,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:33,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591697520] [2024-06-14 13:52:33,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:33,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:33,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:33,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:33,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:33,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:33,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 939 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) [2024-06-14 13:52:33,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:33,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:33,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:33,491 INFO L124 PetriNetUnfolderBase]: 906/1533 cut-off events. [2024-06-14 13:52:33,491 INFO L125 PetriNetUnfolderBase]: For 10811/10828 co-relation queries the response was YES. [2024-06-14 13:52:33,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 1533 events. 906/1533 cut-off events. For 10811/10828 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7881 event pairs, 250 based on Foata normal form. 15/1544 useless extension candidates. Maximal degree in co-relation 7363. Up to 1209 conditions per place. [2024-06-14 13:52:33,507 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 83 selfloop transitions, 37 changer transitions 0/126 dead transitions. [2024-06-14 13:52:33,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 126 transitions, 1291 flow [2024-06-14 13:52:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 13:52:33,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 13:52:33,509 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 939 flow. Second operand 6 states and 150 transitions. [2024-06-14 13:52:33,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 126 transitions, 1291 flow [2024-06-14 13:52:33,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 126 transitions, 1212 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:33,536 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 944 flow [2024-06-14 13:52:33,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=944, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-14 13:52:33,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-14 13:52:33,537 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 944 flow [2024-06-14 13:52:33,537 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) [2024-06-14 13:52:33,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:33,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:33,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:52:33,538 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:33,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2071769309, now seen corresponding path program 4 times [2024-06-14 13:52:33,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:33,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116163142] [2024-06-14 13:52:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:33,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:33,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:33,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116163142] [2024-06-14 13:52:33,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116163142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:33,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:33,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:33,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943523563] [2024-06-14 13:52:33,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:33,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:33,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:33,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:33,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 944 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) [2024-06-14 13:52:33,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:33,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:33,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,214 INFO L124 PetriNetUnfolderBase]: 930/1569 cut-off events. [2024-06-14 13:52:34,215 INFO L125 PetriNetUnfolderBase]: For 12406/12423 co-relation queries the response was YES. [2024-06-14 13:52:34,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7798 conditions, 1569 events. 930/1569 cut-off events. For 12406/12423 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8132 event pairs, 255 based on Foata normal form. 15/1574 useless extension candidates. Maximal degree in co-relation 7751. Up to 1171 conditions per place. [2024-06-14 13:52:34,230 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 60 changer transitions 0/148 dead transitions. [2024-06-14 13:52:34,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 148 transitions, 1528 flow [2024-06-14 13:52:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:52:34,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-14 13:52:34,232 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 944 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:52:34,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 148 transitions, 1528 flow [2024-06-14 13:52:34,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 148 transitions, 1454 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:34,251 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 1144 flow [2024-06-14 13:52:34,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1144, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2024-06-14 13:52:34,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-14 13:52:34,253 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 1144 flow [2024-06-14 13:52:34,253 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) [2024-06-14 13:52:34,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:34,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:34,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:52:34,254 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:34,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:34,254 INFO L85 PathProgramCache]: Analyzing trace with hash 505754820, now seen corresponding path program 1 times [2024-06-14 13:52:34,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:34,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035206710] [2024-06-14 13:52:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:34,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:34,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035206710] [2024-06-14 13:52:34,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035206710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:34,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:34,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:34,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379363165] [2024-06-14 13:52:34,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:34,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:34,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:34,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:34,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 1144 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:34,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:34,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,954 INFO L124 PetriNetUnfolderBase]: 947/1598 cut-off events. [2024-06-14 13:52:34,955 INFO L125 PetriNetUnfolderBase]: For 15459/15476 co-relation queries the response was YES. [2024-06-14 13:52:34,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 1598 events. 947/1598 cut-off events. For 15459/15476 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8274 event pairs, 164 based on Foata normal form. 16/1610 useless extension candidates. Maximal degree in co-relation 8520. Up to 1278 conditions per place. [2024-06-14 13:52:34,969 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 23 changer transitions 0/143 dead transitions. [2024-06-14 13:52:34,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 143 transitions, 1604 flow [2024-06-14 13:52:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:52:34,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 13:52:34,971 INFO L175 Difference]: Start difference. First operand has 96 places, 113 transitions, 1144 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:52:34,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 143 transitions, 1604 flow [2024-06-14 13:52:34,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 143 transitions, 1500 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:34,996 INFO L231 Difference]: Finished difference. Result has 99 places, 117 transitions, 1169 flow [2024-06-14 13:52:34,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1169, PETRI_PLACES=99, PETRI_TRANSITIONS=117} [2024-06-14 13:52:34,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-14 13:52:34,998 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 117 transitions, 1169 flow [2024-06-14 13:52:34,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:34,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:34,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:52:34,999 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:34,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:34,999 INFO L85 PathProgramCache]: Analyzing trace with hash 508611780, now seen corresponding path program 2 times [2024-06-14 13:52:34,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:35,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955022092] [2024-06-14 13:52:35,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:35,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:35,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:35,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955022092] [2024-06-14 13:52:35,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955022092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:35,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:35,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:35,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287102204] [2024-06-14 13:52:35,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:35,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:35,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:35,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 1169 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:35,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:35,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:35,738 INFO L124 PetriNetUnfolderBase]: 964/1625 cut-off events. [2024-06-14 13:52:35,738 INFO L125 PetriNetUnfolderBase]: For 16935/16952 co-relation queries the response was YES. [2024-06-14 13:52:35,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 1625 events. 964/1625 cut-off events. For 16935/16952 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8435 event pairs, 235 based on Foata normal form. 16/1637 useless extension candidates. Maximal degree in co-relation 8781. Up to 1369 conditions per place. [2024-06-14 13:52:35,756 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 20 changer transitions 0/142 dead transitions. [2024-06-14 13:52:35,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1537 flow [2024-06-14 13:52:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:52:35,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-14 13:52:35,759 INFO L175 Difference]: Start difference. First operand has 99 places, 117 transitions, 1169 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:52:35,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1537 flow [2024-06-14 13:52:35,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1464 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:35,792 INFO L231 Difference]: Finished difference. Result has 103 places, 119 transitions, 1185 flow [2024-06-14 13:52:35,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1185, PETRI_PLACES=103, PETRI_TRANSITIONS=119} [2024-06-14 13:52:35,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-14 13:52:35,794 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 119 transitions, 1185 flow [2024-06-14 13:52:35,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:35,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:35,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:52:35,797 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:35,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1456397884, now seen corresponding path program 3 times [2024-06-14 13:52:35,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:35,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720036259] [2024-06-14 13:52:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:35,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:36,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:36,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720036259] [2024-06-14 13:52:36,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720036259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:36,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:36,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:36,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480761208] [2024-06-14 13:52:36,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:36,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:36,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:36,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:36,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 119 transitions, 1185 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) [2024-06-14 13:52:36,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:36,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:36,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:36,447 INFO L124 PetriNetUnfolderBase]: 956/1613 cut-off events. [2024-06-14 13:52:36,447 INFO L125 PetriNetUnfolderBase]: For 17760/17777 co-relation queries the response was YES. [2024-06-14 13:52:36,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8727 conditions, 1613 events. 956/1613 cut-off events. For 17760/17777 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8369 event pairs, 162 based on Foata normal form. 16/1625 useless extension candidates. Maximal degree in co-relation 8674. Up to 1336 conditions per place. [2024-06-14 13:52:36,463 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 113 selfloop transitions, 19 changer transitions 0/138 dead transitions. [2024-06-14 13:52:36,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 138 transitions, 1497 flow [2024-06-14 13:52:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 13:52:36,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-14 13:52:36,465 INFO L175 Difference]: Start difference. First operand has 103 places, 119 transitions, 1185 flow. Second operand 5 states and 122 transitions. [2024-06-14 13:52:36,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 138 transitions, 1497 flow [2024-06-14 13:52:36,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 138 transitions, 1426 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:36,500 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 1162 flow [2024-06-14 13:52:36,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1162, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-06-14 13:52:36,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-14 13:52:36,500 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 1162 flow [2024-06-14 13:52:36,501 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) [2024-06-14 13:52:36,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:36,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:36,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:52:36,501 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:36,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:36,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1456213186, now seen corresponding path program 1 times [2024-06-14 13:52:36,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:36,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472423297] [2024-06-14 13:52:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:36,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:36,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472423297] [2024-06-14 13:52:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472423297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:36,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:36,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:36,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669182134] [2024-06-14 13:52:36,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:36,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:36,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:36,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:36,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:36,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:36,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 1162 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) [2024-06-14 13:52:36,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:36,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:36,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:37,122 INFO L124 PetriNetUnfolderBase]: 1011/1700 cut-off events. [2024-06-14 13:52:37,122 INFO L125 PetriNetUnfolderBase]: For 20536/20553 co-relation queries the response was YES. [2024-06-14 13:52:37,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9127 conditions, 1700 events. 1011/1700 cut-off events. For 20536/20553 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8876 event pairs, 213 based on Foata normal form. 24/1720 useless extension candidates. Maximal degree in co-relation 9073. Up to 1334 conditions per place. [2024-06-14 13:52:37,141 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 29 changer transitions 0/143 dead transitions. [2024-06-14 13:52:37,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1574 flow [2024-06-14 13:52:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:52:37,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 13:52:37,143 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 1162 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:52:37,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1574 flow [2024-06-14 13:52:37,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 143 transitions, 1529 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:37,179 INFO L231 Difference]: Finished difference. Result has 106 places, 121 transitions, 1221 flow [2024-06-14 13:52:37,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1221, PETRI_PLACES=106, PETRI_TRANSITIONS=121} [2024-06-14 13:52:37,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-14 13:52:37,180 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 121 transitions, 1221 flow [2024-06-14 13:52:37,180 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) [2024-06-14 13:52:37,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:37,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:52:37,181 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:37,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:37,181 INFO L85 PathProgramCache]: Analyzing trace with hash -136175702, now seen corresponding path program 1 times [2024-06-14 13:52:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:37,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880974096] [2024-06-14 13:52:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:37,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880974096] [2024-06-14 13:52:37,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880974096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:37,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:37,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255709569] [2024-06-14 13:52:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:37,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:37,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:37,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:37,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 13:52:37,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 1221 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) [2024-06-14 13:52:37,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:37,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 13:52:37,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:37,760 INFO L124 PetriNetUnfolderBase]: 937/1589 cut-off events. [2024-06-14 13:52:37,760 INFO L125 PetriNetUnfolderBase]: For 20720/20729 co-relation queries the response was YES. [2024-06-14 13:52:37,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8854 conditions, 1589 events. 937/1589 cut-off events. For 20720/20729 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8350 event pairs, 214 based on Foata normal form. 8/1576 useless extension candidates. Maximal degree in co-relation 8799. Up to 1337 conditions per place. [2024-06-14 13:52:37,778 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 96 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-14 13:52:37,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1493 flow [2024-06-14 13:52:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:52:37,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 13:52:37,781 INFO L175 Difference]: Start difference. First operand has 106 places, 121 transitions, 1221 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:52:37,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1493 flow [2024-06-14 13:52:37,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 1417 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:37,822 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 1211 flow [2024-06-14 13:52:37,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1211, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2024-06-14 13:52:37,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-14 13:52:37,823 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 1211 flow [2024-06-14 13:52:37,823 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) [2024-06-14 13:52:37,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:37,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:37,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:52:37,824 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:37,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1817930080, now seen corresponding path program 2 times [2024-06-14 13:52:37,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:37,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123866636] [2024-06-14 13:52:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:38,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:38,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123866636] [2024-06-14 13:52:38,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123866636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:38,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:38,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:38,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80811640] [2024-06-14 13:52:38,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:38,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:38,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:38,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:38,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:38,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:38,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 1211 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) [2024-06-14 13:52:38,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:38,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:38,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:38,428 INFO L124 PetriNetUnfolderBase]: 1033/1729 cut-off events. [2024-06-14 13:52:38,429 INFO L125 PetriNetUnfolderBase]: For 24056/24073 co-relation queries the response was YES. [2024-06-14 13:52:38,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1729 events. 1033/1729 cut-off events. For 24056/24073 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9010 event pairs, 244 based on Foata normal form. 24/1743 useless extension candidates. Maximal degree in co-relation 9420. Up to 1402 conditions per place. [2024-06-14 13:52:38,476 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 33 changer transitions 0/149 dead transitions. [2024-06-14 13:52:38,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 149 transitions, 1689 flow [2024-06-14 13:52:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:52:38,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-14 13:52:38,478 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 1211 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:52:38,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 149 transitions, 1689 flow [2024-06-14 13:52:38,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 149 transitions, 1626 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:38,515 INFO L231 Difference]: Finished difference. Result has 108 places, 123 transitions, 1264 flow [2024-06-14 13:52:38,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1264, PETRI_PLACES=108, PETRI_TRANSITIONS=123} [2024-06-14 13:52:38,516 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-14 13:52:38,516 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 123 transitions, 1264 flow [2024-06-14 13:52:38,516 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) [2024-06-14 13:52:38,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:38,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:38,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:52:38,517 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:38,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:38,517 INFO L85 PathProgramCache]: Analyzing trace with hash -191082084, now seen corresponding path program 3 times [2024-06-14 13:52:38,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354409691] [2024-06-14 13:52:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:38,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:38,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354409691] [2024-06-14 13:52:38,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354409691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:38,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:38,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:38,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331979924] [2024-06-14 13:52:38,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:38,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:38,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:38,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 123 transitions, 1264 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) [2024-06-14 13:52:38,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:38,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:38,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:39,126 INFO L124 PetriNetUnfolderBase]: 1099/1831 cut-off events. [2024-06-14 13:52:39,126 INFO L125 PetriNetUnfolderBase]: For 25580/25597 co-relation queries the response was YES. [2024-06-14 13:52:39,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10123 conditions, 1831 events. 1099/1831 cut-off events. For 25580/25597 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9673 event pairs, 225 based on Foata normal form. 24/1845 useless extension candidates. Maximal degree in co-relation 10067. Up to 1285 conditions per place. [2024-06-14 13:52:39,148 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-14 13:52:39,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 157 transitions, 1834 flow [2024-06-14 13:52:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:52:39,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-14 13:52:39,150 INFO L175 Difference]: Start difference. First operand has 108 places, 123 transitions, 1264 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:52:39,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 157 transitions, 1834 flow [2024-06-14 13:52:39,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 157 transitions, 1744 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:39,199 INFO L231 Difference]: Finished difference. Result has 110 places, 126 transitions, 1311 flow [2024-06-14 13:52:39,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1311, PETRI_PLACES=110, PETRI_TRANSITIONS=126} [2024-06-14 13:52:39,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-14 13:52:39,199 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 126 transitions, 1311 flow [2024-06-14 13:52:39,200 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) [2024-06-14 13:52:39,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:39,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:39,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:52:39,200 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:39,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1743306966, now seen corresponding path program 2 times [2024-06-14 13:52:39,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:39,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840619962] [2024-06-14 13:52:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:39,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:39,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:39,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840619962] [2024-06-14 13:52:39,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840619962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:39,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:39,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53965832] [2024-06-14 13:52:39,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:39,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:39,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:39,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 13:52:39,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 126 transitions, 1311 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) [2024-06-14 13:52:39,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:39,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 13:52:39,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:39,783 INFO L124 PetriNetUnfolderBase]: 1047/1751 cut-off events. [2024-06-14 13:52:39,783 INFO L125 PetriNetUnfolderBase]: For 26345/26354 co-relation queries the response was YES. [2024-06-14 13:52:39,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9977 conditions, 1751 events. 1047/1751 cut-off events. For 26345/26354 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9294 event pairs, 262 based on Foata normal form. 8/1734 useless extension candidates. Maximal degree in co-relation 9920. Up to 1481 conditions per place. [2024-06-14 13:52:39,804 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 92 selfloop transitions, 36 changer transitions 0/140 dead transitions. [2024-06-14 13:52:39,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 1706 flow [2024-06-14 13:52:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:52:39,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 13:52:39,807 INFO L175 Difference]: Start difference. First operand has 110 places, 126 transitions, 1311 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:52:39,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 1706 flow [2024-06-14 13:52:39,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1633 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:39,850 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 1354 flow [2024-06-14 13:52:39,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1354, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-14 13:52:39,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-14 13:52:39,850 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 1354 flow [2024-06-14 13:52:39,851 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) [2024-06-14 13:52:39,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:39,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:39,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:52:39,851 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)] === [2024-06-14 13:52:39,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1781723468, now seen corresponding path program 1 times [2024-06-14 13:52:39,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122045343] [2024-06-14 13:52:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:39,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:40,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:40,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122045343] [2024-06-14 13:52:40,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122045343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:40,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:40,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:40,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891537846] [2024-06-14 13:52:40,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:40,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:40,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:40,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:40,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:40,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 13:52:40,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 1354 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) [2024-06-14 13:52:40,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:40,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 13:52:40,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:40,450 INFO L124 PetriNetUnfolderBase]: 1061/1783 cut-off events. [2024-06-14 13:52:40,450 INFO L125 PetriNetUnfolderBase]: For 28550/28555 co-relation queries the response was YES. [2024-06-14 13:52:40,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10074 conditions, 1783 events. 1061/1783 cut-off events. For 28550/28555 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9497 event pairs, 247 based on Foata normal form. 15/1779 useless extension candidates. Maximal degree in co-relation 10015. Up to 1534 conditions per place. [2024-06-14 13:52:40,469 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 118 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2024-06-14 13:52:40,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1684 flow [2024-06-14 13:52:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 13:52:40,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-14 13:52:40,470 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 1354 flow. Second operand 5 states and 118 transitions. [2024-06-14 13:52:40,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1684 flow [2024-06-14 13:52:40,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 144 transitions, 1579 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:40,508 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1307 flow [2024-06-14 13:52:40,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1307, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-14 13:52:40,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-14 13:52:40,509 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1307 flow [2024-06-14 13:52:40,509 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) [2024-06-14 13:52:40,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:40,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:40,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:52:40,510 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:40,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:40,510 INFO L85 PathProgramCache]: Analyzing trace with hash -288866032, now seen corresponding path program 1 times [2024-06-14 13:52:40,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:40,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417407295] [2024-06-14 13:52:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:40,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:40,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:40,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417407295] [2024-06-14 13:52:40,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417407295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:40,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:40,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26862148] [2024-06-14 13:52:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:40,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:40,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:40,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1307 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) [2024-06-14 13:52:40,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:40,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:40,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:41,453 INFO L124 PetriNetUnfolderBase]: 1679/2870 cut-off events. [2024-06-14 13:52:41,453 INFO L125 PetriNetUnfolderBase]: For 56959/56976 co-relation queries the response was YES. [2024-06-14 13:52:41,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16080 conditions, 2870 events. 1679/2870 cut-off events. For 56959/56976 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17306 event pairs, 436 based on Foata normal form. 48/2914 useless extension candidates. Maximal degree in co-relation 16022. Up to 1290 conditions per place. [2024-06-14 13:52:41,482 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 138 selfloop transitions, 49 changer transitions 0/193 dead transitions. [2024-06-14 13:52:41,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 193 transitions, 2157 flow [2024-06-14 13:52:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-14 13:52:41,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-14 13:52:41,485 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1307 flow. Second operand 9 states and 227 transitions. [2024-06-14 13:52:41,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 193 transitions, 2157 flow [2024-06-14 13:52:41,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 193 transitions, 2121 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:41,561 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 1463 flow [2024-06-14 13:52:41,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1463, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-14 13:52:41,562 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-14 13:52:41,562 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 1463 flow [2024-06-14 13:52:41,562 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) [2024-06-14 13:52:41,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:41,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:41,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:52:41,563 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:41,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:41,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1412899176, now seen corresponding path program 2 times [2024-06-14 13:52:41,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:41,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569794314] [2024-06-14 13:52:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:41,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:41,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:41,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569794314] [2024-06-14 13:52:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569794314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:41,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:41,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:41,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094143930] [2024-06-14 13:52:41,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:41,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:41,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:41,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 1463 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) [2024-06-14 13:52:41,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:41,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:41,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:42,410 INFO L124 PetriNetUnfolderBase]: 1838/3147 cut-off events. [2024-06-14 13:52:42,410 INFO L125 PetriNetUnfolderBase]: For 68900/68917 co-relation queries the response was YES. [2024-06-14 13:52:42,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17849 conditions, 3147 events. 1838/3147 cut-off events. For 68900/68917 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19558 event pairs, 638 based on Foata normal form. 54/3189 useless extension candidates. Maximal degree in co-relation 17788. Up to 2437 conditions per place. [2024-06-14 13:52:42,444 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 123 selfloop transitions, 45 changer transitions 0/174 dead transitions. [2024-06-14 13:52:42,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 174 transitions, 2047 flow [2024-06-14 13:52:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:52:42,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-14 13:52:42,446 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 1463 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:52:42,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 174 transitions, 2047 flow [2024-06-14 13:52:42,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 174 transitions, 1943 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:42,532 INFO L231 Difference]: Finished difference. Result has 125 places, 135 transitions, 1491 flow [2024-06-14 13:52:42,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=125, PETRI_TRANSITIONS=135} [2024-06-14 13:52:42,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-14 13:52:42,533 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 135 transitions, 1491 flow [2024-06-14 13:52:42,533 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) [2024-06-14 13:52:42,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:42,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:42,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:52:42,534 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:42,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1412902896, now seen corresponding path program 3 times [2024-06-14 13:52:42,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:42,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328197285] [2024-06-14 13:52:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:42,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:42,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:42,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328197285] [2024-06-14 13:52:42,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328197285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:42,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:42,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:42,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655300223] [2024-06-14 13:52:42,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:42,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:42,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:42,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:42,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:42,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 135 transitions, 1491 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) [2024-06-14 13:52:42,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:42,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:42,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:43,613 INFO L124 PetriNetUnfolderBase]: 2142/3717 cut-off events. [2024-06-14 13:52:43,614 INFO L125 PetriNetUnfolderBase]: For 81200/81217 co-relation queries the response was YES. [2024-06-14 13:52:43,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20831 conditions, 3717 events. 2142/3717 cut-off events. For 81200/81217 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24263 event pairs, 768 based on Foata normal form. 48/3761 useless extension candidates. Maximal degree in co-relation 20769. Up to 2374 conditions per place. [2024-06-14 13:52:43,667 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 44 changer transitions 0/183 dead transitions. [2024-06-14 13:52:43,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 183 transitions, 2201 flow [2024-06-14 13:52:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 13:52:43,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-14 13:52:43,669 INFO L175 Difference]: Start difference. First operand has 125 places, 135 transitions, 1491 flow. Second operand 8 states and 201 transitions. [2024-06-14 13:52:43,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 183 transitions, 2201 flow [2024-06-14 13:52:43,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 183 transitions, 2089 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:43,787 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 1540 flow [2024-06-14 13:52:43,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1540, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2024-06-14 13:52:43,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-14 13:52:43,788 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 1540 flow [2024-06-14 13:52:43,788 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) [2024-06-14 13:52:43,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:43,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:43,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:52:43,789 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:43,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash 73223106, now seen corresponding path program 1 times [2024-06-14 13:52:43,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:43,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923748336] [2024-06-14 13:52:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:44,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:44,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923748336] [2024-06-14 13:52:44,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923748336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:44,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:44,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:44,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072984998] [2024-06-14 13:52:44,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:44,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:44,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:44,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:44,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:44,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 1540 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) [2024-06-14 13:52:44,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:44,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:44,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:44,653 INFO L124 PetriNetUnfolderBase]: 2157/3744 cut-off events. [2024-06-14 13:52:44,654 INFO L125 PetriNetUnfolderBase]: For 79201/79218 co-relation queries the response was YES. [2024-06-14 13:52:44,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21232 conditions, 3744 events. 2157/3744 cut-off events. For 79201/79218 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24441 event pairs, 864 based on Foata normal form. 15/3755 useless extension candidates. Maximal degree in co-relation 21168. Up to 3274 conditions per place. [2024-06-14 13:52:44,693 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 43 changer transitions 0/163 dead transitions. [2024-06-14 13:52:44,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 163 transitions, 2042 flow [2024-06-14 13:52:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:52:44,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-14 13:52:44,695 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 1540 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:52:44,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 163 transitions, 2042 flow [2024-06-14 13:52:44,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 163 transitions, 1923 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:44,814 INFO L231 Difference]: Finished difference. Result has 129 places, 142 transitions, 1598 flow [2024-06-14 13:52:44,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1598, PETRI_PLACES=129, PETRI_TRANSITIONS=142} [2024-06-14 13:52:44,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-14 13:52:44,815 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 142 transitions, 1598 flow [2024-06-14 13:52:44,815 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) [2024-06-14 13:52:44,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:44,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:44,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:52:44,816 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:44,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2096454830, now seen corresponding path program 4 times [2024-06-14 13:52:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:44,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687853412] [2024-06-14 13:52:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:45,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687853412] [2024-06-14 13:52:45,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687853412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:45,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:45,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:45,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380601056] [2024-06-14 13:52:45,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:45,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:45,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:45,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:45,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:45,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:45,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 142 transitions, 1598 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) [2024-06-14 13:52:45,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:45,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:45,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:45,689 INFO L124 PetriNetUnfolderBase]: 2316/4021 cut-off events. [2024-06-14 13:52:45,689 INFO L125 PetriNetUnfolderBase]: For 95929/95946 co-relation queries the response was YES. [2024-06-14 13:52:45,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22411 conditions, 4021 events. 2316/4021 cut-off events. For 95929/95946 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26668 event pairs, 928 based on Foata normal form. 54/4071 useless extension candidates. Maximal degree in co-relation 22346. Up to 3271 conditions per place. [2024-06-14 13:52:45,719 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 128 selfloop transitions, 42 changer transitions 1/177 dead transitions. [2024-06-14 13:52:45,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 177 transitions, 2142 flow [2024-06-14 13:52:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:52:45,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-14 13:52:45,721 INFO L175 Difference]: Start difference. First operand has 129 places, 142 transitions, 1598 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:52:45,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 177 transitions, 2142 flow [2024-06-14 13:52:45,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 177 transitions, 2077 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:45,855 INFO L231 Difference]: Finished difference. Result has 133 places, 142 transitions, 1651 flow [2024-06-14 13:52:45,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1651, PETRI_PLACES=133, PETRI_TRANSITIONS=142} [2024-06-14 13:52:45,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-14 13:52:45,856 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 142 transitions, 1651 flow [2024-06-14 13:52:45,856 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) [2024-06-14 13:52:45,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:45,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:45,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:52:45,857 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:45,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:45,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2101817210, now seen corresponding path program 5 times [2024-06-14 13:52:45,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:45,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861805150] [2024-06-14 13:52:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:45,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:46,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861805150] [2024-06-14 13:52:46,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861805150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:46,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:46,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:46,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294896064] [2024-06-14 13:52:46,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:46,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:46,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:46,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:46,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:46,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 142 transitions, 1651 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) [2024-06-14 13:52:46,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:46,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:46,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:46,816 INFO L124 PetriNetUnfolderBase]: 2423/4196 cut-off events. [2024-06-14 13:52:46,816 INFO L125 PetriNetUnfolderBase]: For 105895/105912 co-relation queries the response was YES. [2024-06-14 13:52:46,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23387 conditions, 4196 events. 2423/4196 cut-off events. For 105895/105912 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28072 event pairs, 957 based on Foata normal form. 54/4242 useless extension candidates. Maximal degree in co-relation 23321. Up to 3512 conditions per place. [2024-06-14 13:52:46,849 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 127 selfloop transitions, 46 changer transitions 3/182 dead transitions. [2024-06-14 13:52:46,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 182 transitions, 2221 flow [2024-06-14 13:52:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 13:52:46,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-14 13:52:46,850 INFO L175 Difference]: Start difference. First operand has 133 places, 142 transitions, 1651 flow. Second operand 9 states and 212 transitions. [2024-06-14 13:52:46,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 182 transitions, 2221 flow [2024-06-14 13:52:46,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 182 transitions, 2111 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:46,947 INFO L231 Difference]: Finished difference. Result has 137 places, 142 transitions, 1667 flow [2024-06-14 13:52:46,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1667, PETRI_PLACES=137, PETRI_TRANSITIONS=142} [2024-06-14 13:52:46,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-14 13:52:46,948 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 142 transitions, 1667 flow [2024-06-14 13:52:46,949 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) [2024-06-14 13:52:46,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:46,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:46,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:52:46,949 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:46,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:46,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2096306960, now seen corresponding path program 6 times [2024-06-14 13:52:46,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:46,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634801098] [2024-06-14 13:52:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:46,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:47,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:47,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634801098] [2024-06-14 13:52:47,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634801098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:47,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:47,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:47,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066861363] [2024-06-14 13:52:47,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:47,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:47,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:47,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 142 transitions, 1667 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) [2024-06-14 13:52:47,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:47,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:47,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:47,894 INFO L124 PetriNetUnfolderBase]: 2483/4348 cut-off events. [2024-06-14 13:52:47,894 INFO L125 PetriNetUnfolderBase]: For 105172/105189 co-relation queries the response was YES. [2024-06-14 13:52:47,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23480 conditions, 4348 events. 2483/4348 cut-off events. For 105172/105189 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 29553 event pairs, 853 based on Foata normal form. 48/4392 useless extension candidates. Maximal degree in co-relation 23413. Up to 2675 conditions per place. [2024-06-14 13:52:47,930 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 137 selfloop transitions, 42 changer transitions 0/185 dead transitions. [2024-06-14 13:52:47,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 185 transitions, 2347 flow [2024-06-14 13:52:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 13:52:47,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-14 13:52:47,932 INFO L175 Difference]: Start difference. First operand has 137 places, 142 transitions, 1667 flow. Second operand 7 states and 179 transitions. [2024-06-14 13:52:47,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 185 transitions, 2347 flow [2024-06-14 13:52:48,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 185 transitions, 2226 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:48,043 INFO L231 Difference]: Finished difference. Result has 138 places, 144 transitions, 1719 flow [2024-06-14 13:52:48,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1719, PETRI_PLACES=138, PETRI_TRANSITIONS=144} [2024-06-14 13:52:48,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-14 13:52:48,043 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 144 transitions, 1719 flow [2024-06-14 13:52:48,044 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) [2024-06-14 13:52:48,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:48,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:48,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:52:48,044 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:48,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2102032412, now seen corresponding path program 1 times [2024-06-14 13:52:48,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:48,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277545068] [2024-06-14 13:52:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:48,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:48,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:48,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277545068] [2024-06-14 13:52:48,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277545068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:48,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125229655] [2024-06-14 13:52:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:48,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:48,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 144 transitions, 1719 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) [2024-06-14 13:52:48,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:48,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:48,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:49,163 INFO L124 PetriNetUnfolderBase]: 2592/4527 cut-off events. [2024-06-14 13:52:49,163 INFO L125 PetriNetUnfolderBase]: For 114693/114710 co-relation queries the response was YES. [2024-06-14 13:52:49,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24440 conditions, 4527 events. 2592/4527 cut-off events. For 114693/114710 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31100 event pairs, 905 based on Foata normal form. 48/4569 useless extension candidates. Maximal degree in co-relation 24371. Up to 3248 conditions per place. [2024-06-14 13:52:49,199 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 129 selfloop transitions, 50 changer transitions 5/190 dead transitions. [2024-06-14 13:52:49,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 190 transitions, 2349 flow [2024-06-14 13:52:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 13:52:49,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-14 13:52:49,200 INFO L175 Difference]: Start difference. First operand has 138 places, 144 transitions, 1719 flow. Second operand 9 states and 217 transitions. [2024-06-14 13:52:49,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 190 transitions, 2349 flow [2024-06-14 13:52:49,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 190 transitions, 2218 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:49,317 INFO L231 Difference]: Finished difference. Result has 142 places, 143 transitions, 1712 flow [2024-06-14 13:52:49,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1712, PETRI_PLACES=142, PETRI_TRANSITIONS=143} [2024-06-14 13:52:49,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-14 13:52:49,318 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 143 transitions, 1712 flow [2024-06-14 13:52:49,318 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) [2024-06-14 13:52:49,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:49,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:52:49,319 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:49,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash 73521636, now seen corresponding path program 2 times [2024-06-14 13:52:49,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:49,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996894751] [2024-06-14 13:52:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:49,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:49,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:49,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996894751] [2024-06-14 13:52:49,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996894751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:49,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:49,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:49,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354436560] [2024-06-14 13:52:49,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:49,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:49,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:49,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 143 transitions, 1712 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) [2024-06-14 13:52:49,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:49,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:49,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:50,285 INFO L124 PetriNetUnfolderBase]: 2382/4168 cut-off events. [2024-06-14 13:52:50,286 INFO L125 PetriNetUnfolderBase]: For 101347/101364 co-relation queries the response was YES. [2024-06-14 13:52:50,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22863 conditions, 4168 events. 2382/4168 cut-off events. For 101347/101364 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28069 event pairs, 973 based on Foata normal form. 15/4179 useless extension candidates. Maximal degree in co-relation 22793. Up to 3695 conditions per place. [2024-06-14 13:52:50,318 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 115 selfloop transitions, 42 changer transitions 2/165 dead transitions. [2024-06-14 13:52:50,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 165 transitions, 2094 flow [2024-06-14 13:52:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 13:52:50,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-14 13:52:50,320 INFO L175 Difference]: Start difference. First operand has 142 places, 143 transitions, 1712 flow. Second operand 8 states and 181 transitions. [2024-06-14 13:52:50,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 165 transitions, 2094 flow [2024-06-14 13:52:50,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 165 transitions, 1954 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:50,447 INFO L231 Difference]: Finished difference. Result has 143 places, 141 transitions, 1634 flow [2024-06-14 13:52:50,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1634, PETRI_PLACES=143, PETRI_TRANSITIONS=141} [2024-06-14 13:52:50,448 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-14 13:52:50,448 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 141 transitions, 1634 flow [2024-06-14 13:52:50,448 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) [2024-06-14 13:52:50,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:50,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:50,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:52:50,449 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:50,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1894488868, now seen corresponding path program 7 times [2024-06-14 13:52:50,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:50,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116599413] [2024-06-14 13:52:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:50,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:50,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116599413] [2024-06-14 13:52:50,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116599413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:50,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:50,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:50,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188413386] [2024-06-14 13:52:50,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:50,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:50,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:50,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:50,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:50,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:50,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 141 transitions, 1634 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) [2024-06-14 13:52:50,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:50,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:50,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:51,371 INFO L124 PetriNetUnfolderBase]: 2408/4216 cut-off events. [2024-06-14 13:52:51,371 INFO L125 PetriNetUnfolderBase]: For 124296/124313 co-relation queries the response was YES. [2024-06-14 13:52:51,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22937 conditions, 4216 events. 2408/4216 cut-off events. For 124296/124313 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28454 event pairs, 983 based on Foata normal form. 54/4258 useless extension candidates. Maximal degree in co-relation 22866. Up to 3454 conditions per place. [2024-06-14 13:52:51,403 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 116 selfloop transitions, 62 changer transitions 3/187 dead transitions. [2024-06-14 13:52:51,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 187 transitions, 2422 flow [2024-06-14 13:52:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-14 13:52:51,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-14 13:52:51,405 INFO L175 Difference]: Start difference. First operand has 143 places, 141 transitions, 1634 flow. Second operand 9 states and 218 transitions. [2024-06-14 13:52:51,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 187 transitions, 2422 flow [2024-06-14 13:52:51,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 187 transitions, 2288 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 13:52:51,512 INFO L231 Difference]: Finished difference. Result has 143 places, 141 transitions, 1672 flow [2024-06-14 13:52:51,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1672, PETRI_PLACES=143, PETRI_TRANSITIONS=141} [2024-06-14 13:52:51,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-14 13:52:51,513 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 141 transitions, 1672 flow [2024-06-14 13:52:51,513 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) [2024-06-14 13:52:51,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:51,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:51,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:52:51,514 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:51,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1637773156, now seen corresponding path program 2 times [2024-06-14 13:52:51,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:51,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445142133] [2024-06-14 13:52:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:51,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:51,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:51,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445142133] [2024-06-14 13:52:51,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445142133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:51,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:51,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:51,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564092185] [2024-06-14 13:52:51,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:51,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:51,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:51,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:51,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:51,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 141 transitions, 1672 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) [2024-06-14 13:52:51,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:51,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:51,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:52,584 INFO L124 PetriNetUnfolderBase]: 2507/4415 cut-off events. [2024-06-14 13:52:52,584 INFO L125 PetriNetUnfolderBase]: For 131419/131436 co-relation queries the response was YES. [2024-06-14 13:52:52,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24018 conditions, 4415 events. 2507/4415 cut-off events. For 131419/131436 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30268 event pairs, 983 based on Foata normal form. 48/4451 useless extension candidates. Maximal degree in co-relation 23946. Up to 3390 conditions per place. [2024-06-14 13:52:52,617 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 121 selfloop transitions, 64 changer transitions 6/197 dead transitions. [2024-06-14 13:52:52,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 197 transitions, 2536 flow [2024-06-14 13:52:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 13:52:52,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-14 13:52:52,618 INFO L175 Difference]: Start difference. First operand has 143 places, 141 transitions, 1672 flow. Second operand 10 states and 242 transitions. [2024-06-14 13:52:52,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 197 transitions, 2536 flow [2024-06-14 13:52:52,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 197 transitions, 2377 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:52,736 INFO L231 Difference]: Finished difference. Result has 146 places, 141 transitions, 1686 flow [2024-06-14 13:52:52,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1686, PETRI_PLACES=146, PETRI_TRANSITIONS=141} [2024-06-14 13:52:52,736 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-14 13:52:52,737 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 141 transitions, 1686 flow [2024-06-14 13:52:52,737 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) [2024-06-14 13:52:52,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:52,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:52,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:52:52,737 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:52,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:52,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1628576386, now seen corresponding path program 3 times [2024-06-14 13:52:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:52,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129537251] [2024-06-14 13:52:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:52,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:52,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129537251] [2024-06-14 13:52:52,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129537251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:52,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:52,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:52,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932560721] [2024-06-14 13:52:52,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:52,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:52,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:53,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:53,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 141 transitions, 1686 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) [2024-06-14 13:52:53,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:53,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:53,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:53,719 INFO L124 PetriNetUnfolderBase]: 2652/4644 cut-off events. [2024-06-14 13:52:53,719 INFO L125 PetriNetUnfolderBase]: For 145074/145091 co-relation queries the response was YES. [2024-06-14 13:52:53,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25131 conditions, 4644 events. 2652/4644 cut-off events. For 145074/145091 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32008 event pairs, 948 based on Foata normal form. 48/4678 useless extension candidates. Maximal degree in co-relation 25058. Up to 2800 conditions per place. [2024-06-14 13:52:53,756 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 113 selfloop transitions, 69 changer transitions 8/196 dead transitions. [2024-06-14 13:52:53,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 196 transitions, 2534 flow [2024-06-14 13:52:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 13:52:53,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 13:52:53,757 INFO L175 Difference]: Start difference. First operand has 146 places, 141 transitions, 1686 flow. Second operand 9 states and 225 transitions. [2024-06-14 13:52:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 196 transitions, 2534 flow [2024-06-14 13:52:53,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 196 transitions, 2368 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:53,900 INFO L231 Difference]: Finished difference. Result has 146 places, 138 transitions, 1570 flow [2024-06-14 13:52:53,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1570, PETRI_PLACES=146, PETRI_TRANSITIONS=138} [2024-06-14 13:52:53,901 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-14 13:52:53,901 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 138 transitions, 1570 flow [2024-06-14 13:52:53,901 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) [2024-06-14 13:52:53,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:53,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:53,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:52:53,901 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:53,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:53,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1792060004, now seen corresponding path program 3 times [2024-06-14 13:52:53,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:53,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354375230] [2024-06-14 13:52:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:53,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:54,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:54,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354375230] [2024-06-14 13:52:54,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354375230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:54,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:54,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:54,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155519546] [2024-06-14 13:52:54,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:54,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:54,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:54,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:54,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:54,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:54,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 138 transitions, 1570 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) [2024-06-14 13:52:54,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:54,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:54,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:54,893 INFO L124 PetriNetUnfolderBase]: 2378/4189 cut-off events. [2024-06-14 13:52:54,893 INFO L125 PetriNetUnfolderBase]: For 130731/130742 co-relation queries the response was YES. [2024-06-14 13:52:54,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23434 conditions, 4189 events. 2378/4189 cut-off events. For 130731/130742 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28396 event pairs, 1009 based on Foata normal form. 11/4194 useless extension candidates. Maximal degree in co-relation 23360. Up to 3651 conditions per place. [2024-06-14 13:52:54,931 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 95 selfloop transitions, 64 changer transitions 0/165 dead transitions. [2024-06-14 13:52:54,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 165 transitions, 2259 flow [2024-06-14 13:52:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:52:54,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-14 13:52:54,932 INFO L175 Difference]: Start difference. First operand has 146 places, 138 transitions, 1570 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:52:54,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 165 transitions, 2259 flow [2024-06-14 13:52:55,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 165 transitions, 2043 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:55,053 INFO L231 Difference]: Finished difference. Result has 146 places, 141 transitions, 1521 flow [2024-06-14 13:52:55,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=146, PETRI_TRANSITIONS=141} [2024-06-14 13:52:55,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-14 13:52:55,054 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 141 transitions, 1521 flow [2024-06-14 13:52:55,054 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) [2024-06-14 13:52:55,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:55,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:55,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:52:55,055 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:55,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2015783543, now seen corresponding path program 1 times [2024-06-14 13:52:55,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:55,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068837070] [2024-06-14 13:52:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:55,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:55,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:55,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068837070] [2024-06-14 13:52:55,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068837070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:55,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:55,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149247706] [2024-06-14 13:52:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:55,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:55,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 13:52:55,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 141 transitions, 1521 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:55,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:55,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 13:52:55,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:55,818 INFO L124 PetriNetUnfolderBase]: 2219/3955 cut-off events. [2024-06-14 13:52:55,818 INFO L125 PetriNetUnfolderBase]: For 123687/123696 co-relation queries the response was YES. [2024-06-14 13:52:55,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21411 conditions, 3955 events. 2219/3955 cut-off events. For 123687/123696 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 26925 event pairs, 868 based on Foata normal form. 17/3948 useless extension candidates. Maximal degree in co-relation 21337. Up to 3436 conditions per place. [2024-06-14 13:52:55,849 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 121 selfloop transitions, 25 changer transitions 0/160 dead transitions. [2024-06-14 13:52:55,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 160 transitions, 1903 flow [2024-06-14 13:52:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 13:52:55,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-14 13:52:55,850 INFO L175 Difference]: Start difference. First operand has 146 places, 141 transitions, 1521 flow. Second operand 6 states and 139 transitions. [2024-06-14 13:52:55,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 160 transitions, 1903 flow [2024-06-14 13:52:55,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 160 transitions, 1730 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:55,965 INFO L231 Difference]: Finished difference. Result has 145 places, 143 transitions, 1446 flow [2024-06-14 13:52:55,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1446, PETRI_PLACES=145, PETRI_TRANSITIONS=143} [2024-06-14 13:52:55,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-14 13:52:55,966 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 143 transitions, 1446 flow [2024-06-14 13:52:55,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:55,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:55,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:55,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:52:55,967 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:55,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash -120741913, now seen corresponding path program 2 times [2024-06-14 13:52:55,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:55,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651807504] [2024-06-14 13:52:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:55,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:56,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:56,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651807504] [2024-06-14 13:52:56,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651807504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:56,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:56,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:56,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163303658] [2024-06-14 13:52:56,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:56,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:56,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:56,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 13:52:56,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 143 transitions, 1446 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:56,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:56,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 13:52:56,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:56,735 INFO L124 PetriNetUnfolderBase]: 2259/4012 cut-off events. [2024-06-14 13:52:56,735 INFO L125 PetriNetUnfolderBase]: For 130755/130764 co-relation queries the response was YES. [2024-06-14 13:52:56,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21851 conditions, 4012 events. 2259/4012 cut-off events. For 130755/130764 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27297 event pairs, 920 based on Foata normal form. 17/4001 useless extension candidates. Maximal degree in co-relation 21777. Up to 3518 conditions per place. [2024-06-14 13:52:56,779 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 33 changer transitions 0/161 dead transitions. [2024-06-14 13:52:56,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 161 transitions, 1970 flow [2024-06-14 13:52:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 13:52:56,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-14 13:52:56,780 INFO L175 Difference]: Start difference. First operand has 145 places, 143 transitions, 1446 flow. Second operand 6 states and 139 transitions. [2024-06-14 13:52:56,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 161 transitions, 1970 flow [2024-06-14 13:52:56,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 161 transitions, 1904 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:56,926 INFO L231 Difference]: Finished difference. Result has 147 places, 145 transitions, 1494 flow [2024-06-14 13:52:56,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1494, PETRI_PLACES=147, PETRI_TRANSITIONS=145} [2024-06-14 13:52:56,926 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-14 13:52:56,926 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 145 transitions, 1494 flow [2024-06-14 13:52:56,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:56,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:56,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:56,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:52:56,927 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:56,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash -107409433, now seen corresponding path program 3 times [2024-06-14 13:52:56,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:56,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137250420] [2024-06-14 13:52:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:56,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:57,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:57,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137250420] [2024-06-14 13:52:57,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137250420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:57,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:57,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:57,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904086759] [2024-06-14 13:52:57,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:57,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:57,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:57,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 13:52:57,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 145 transitions, 1494 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:57,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 13:52:57,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:57,748 INFO L124 PetriNetUnfolderBase]: 2324/4113 cut-off events. [2024-06-14 13:52:57,749 INFO L125 PetriNetUnfolderBase]: For 141073/141082 co-relation queries the response was YES. [2024-06-14 13:52:57,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22670 conditions, 4113 events. 2324/4113 cut-off events. For 141073/141082 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28085 event pairs, 887 based on Foata normal form. 17/4102 useless extension candidates. Maximal degree in co-relation 22595. Up to 3421 conditions per place. [2024-06-14 13:52:57,781 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 39 changer transitions 0/169 dead transitions. [2024-06-14 13:52:57,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 169 transitions, 2156 flow [2024-06-14 13:52:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:52:57,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 13:52:57,783 INFO L175 Difference]: Start difference. First operand has 147 places, 145 transitions, 1494 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:52:57,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 169 transitions, 2156 flow [2024-06-14 13:52:57,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 169 transitions, 2064 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:57,906 INFO L231 Difference]: Finished difference. Result has 149 places, 148 transitions, 1547 flow [2024-06-14 13:52:57,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1547, PETRI_PLACES=149, PETRI_TRANSITIONS=148} [2024-06-14 13:52:57,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-14 13:52:57,906 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 148 transitions, 1547 flow [2024-06-14 13:52:57,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:57,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:57,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:52:57,907 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:57,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1639393537, now seen corresponding path program 1 times [2024-06-14 13:52:57,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:57,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097948637] [2024-06-14 13:52:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:57,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097948637] [2024-06-14 13:52:58,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097948637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:58,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:58,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:58,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17367264] [2024-06-14 13:52:58,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:58,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:58,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:58,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:58,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:58,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 148 transitions, 1547 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) [2024-06-14 13:52:58,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:58,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:58,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:58,802 INFO L124 PetriNetUnfolderBase]: 2511/4397 cut-off events. [2024-06-14 13:52:58,802 INFO L125 PetriNetUnfolderBase]: For 166597/166614 co-relation queries the response was YES. [2024-06-14 13:52:58,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24087 conditions, 4397 events. 2511/4397 cut-off events. For 166597/166614 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29799 event pairs, 845 based on Foata normal form. 48/4441 useless extension candidates. Maximal degree in co-relation 24011. Up to 2890 conditions per place. [2024-06-14 13:52:58,838 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 33 changer transitions 14/187 dead transitions. [2024-06-14 13:52:58,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 187 transitions, 2150 flow [2024-06-14 13:52:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:52:58,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-14 13:52:58,839 INFO L175 Difference]: Start difference. First operand has 149 places, 148 transitions, 1547 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:52:58,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 187 transitions, 2150 flow [2024-06-14 13:52:58,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 187 transitions, 2076 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:58,966 INFO L231 Difference]: Finished difference. Result has 154 places, 139 transitions, 1445 flow [2024-06-14 13:52:58,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1445, PETRI_PLACES=154, PETRI_TRANSITIONS=139} [2024-06-14 13:52:58,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-14 13:52:58,967 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 139 transitions, 1445 flow [2024-06-14 13:52:58,967 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) [2024-06-14 13:52:58,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:58,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:58,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:52:58,967 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:58,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1647964417, now seen corresponding path program 2 times [2024-06-14 13:52:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:58,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590871738] [2024-06-14 13:52:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:58,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:59,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:59,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590871738] [2024-06-14 13:52:59,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590871738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:59,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:59,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:59,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972743651] [2024-06-14 13:52:59,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:59,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:59,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:59,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:52:59,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 139 transitions, 1445 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) [2024-06-14 13:52:59,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:59,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:52:59,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:00,037 INFO L124 PetriNetUnfolderBase]: 2356/4112 cut-off events. [2024-06-14 13:53:00,037 INFO L125 PetriNetUnfolderBase]: For 178537/178554 co-relation queries the response was YES. [2024-06-14 13:53:00,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23315 conditions, 4112 events. 2356/4112 cut-off events. For 178537/178554 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27668 event pairs, 940 based on Foata normal form. 54/4160 useless extension candidates. Maximal degree in co-relation 23237. Up to 3473 conditions per place. [2024-06-14 13:53:00,075 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 124 selfloop transitions, 28 changer transitions 10/168 dead transitions. [2024-06-14 13:53:00,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 168 transitions, 1894 flow [2024-06-14 13:53:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:53:00,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 13:53:00,077 INFO L175 Difference]: Start difference. First operand has 154 places, 139 transitions, 1445 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:53:00,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 168 transitions, 1894 flow [2024-06-14 13:53:00,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 168 transitions, 1825 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:00,204 INFO L231 Difference]: Finished difference. Result has 151 places, 133 transitions, 1371 flow [2024-06-14 13:53:00,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1371, PETRI_PLACES=151, PETRI_TRANSITIONS=133} [2024-06-14 13:53:00,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-14 13:53:00,205 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 133 transitions, 1371 flow [2024-06-14 13:53:00,205 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) [2024-06-14 13:53:00,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:00,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:00,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:53:00,206 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:00,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:00,206 INFO L85 PathProgramCache]: Analyzing trace with hash 343818499, now seen corresponding path program 1 times [2024-06-14 13:53:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:00,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653055847] [2024-06-14 13:53:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:00,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:00,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:00,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653055847] [2024-06-14 13:53:00,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653055847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:00,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:00,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:00,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348997911] [2024-06-14 13:53:00,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:00,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:00,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:00,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:00,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:00,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:00,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 133 transitions, 1371 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) [2024-06-14 13:53:00,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:00,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:00,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:01,057 INFO L124 PetriNetUnfolderBase]: 2228/3891 cut-off events. [2024-06-14 13:53:01,058 INFO L125 PetriNetUnfolderBase]: For 133724/133738 co-relation queries the response was YES. [2024-06-14 13:53:01,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21945 conditions, 3891 events. 2228/3891 cut-off events. For 133724/133738 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25949 event pairs, 912 based on Foata normal form. 12/3899 useless extension candidates. Maximal degree in co-relation 21869. Up to 3456 conditions per place. [2024-06-14 13:53:01,087 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 37 changer transitions 1/161 dead transitions. [2024-06-14 13:53:01,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 161 transitions, 1851 flow [2024-06-14 13:53:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:53:01,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 13:53:01,088 INFO L175 Difference]: Start difference. First operand has 151 places, 133 transitions, 1371 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:53:01,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 161 transitions, 1851 flow [2024-06-14 13:53:01,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 161 transitions, 1757 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:01,205 INFO L231 Difference]: Finished difference. Result has 146 places, 135 transitions, 1386 flow [2024-06-14 13:53:01,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1386, PETRI_PLACES=146, PETRI_TRANSITIONS=135} [2024-06-14 13:53:01,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-14 13:53:01,206 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 135 transitions, 1386 flow [2024-06-14 13:53:01,206 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) [2024-06-14 13:53:01,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:01,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:01,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:53:01,207 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:01,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:01,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1647967393, now seen corresponding path program 2 times [2024-06-14 13:53:01,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:01,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178779074] [2024-06-14 13:53:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:01,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:01,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178779074] [2024-06-14 13:53:01,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178779074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:01,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:01,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:01,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670253146] [2024-06-14 13:53:01,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:01,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:01,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:01,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:01,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:01,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:01,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 135 transitions, 1386 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) [2024-06-14 13:53:01,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:01,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:01,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:01,945 INFO L124 PetriNetUnfolderBase]: 2231/3896 cut-off events. [2024-06-14 13:53:01,945 INFO L125 PetriNetUnfolderBase]: For 119971/119985 co-relation queries the response was YES. [2024-06-14 13:53:01,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21533 conditions, 3896 events. 2231/3896 cut-off events. For 119971/119985 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25976 event pairs, 912 based on Foata normal form. 11/3903 useless extension candidates. Maximal degree in co-relation 21460. Up to 3460 conditions per place. [2024-06-14 13:53:01,974 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 115 selfloop transitions, 38 changer transitions 1/160 dead transitions. [2024-06-14 13:53:01,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 160 transitions, 1856 flow [2024-06-14 13:53:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 13:53:01,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:53:01,975 INFO L175 Difference]: Start difference. First operand has 146 places, 135 transitions, 1386 flow. Second operand 7 states and 160 transitions. [2024-06-14 13:53:01,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 160 transitions, 1856 flow [2024-06-14 13:53:02,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 160 transitions, 1794 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:02,141 INFO L231 Difference]: Finished difference. Result has 149 places, 137 transitions, 1429 flow [2024-06-14 13:53:02,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1429, PETRI_PLACES=149, PETRI_TRANSITIONS=137} [2024-06-14 13:53:02,142 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-14 13:53:02,142 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 137 transitions, 1429 flow [2024-06-14 13:53:02,142 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) [2024-06-14 13:53:02,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:02,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:02,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:53:02,142 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:02,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:02,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1934851747, now seen corresponding path program 3 times [2024-06-14 13:53:02,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:02,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291064003] [2024-06-14 13:53:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:02,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:02,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291064003] [2024-06-14 13:53:02,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291064003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:02,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:02,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:02,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338848314] [2024-06-14 13:53:02,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:02,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:02,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:02,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:02,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 137 transitions, 1429 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) [2024-06-14 13:53:02,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:02,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:02,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:03,123 INFO L124 PetriNetUnfolderBase]: 2120/3699 cut-off events. [2024-06-14 13:53:03,124 INFO L125 PetriNetUnfolderBase]: For 125494/125508 co-relation queries the response was YES. [2024-06-14 13:53:03,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19564 conditions, 3699 events. 2120/3699 cut-off events. For 125494/125508 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24314 event pairs, 819 based on Foata normal form. 52/3745 useless extension candidates. Maximal degree in co-relation 19490. Up to 3122 conditions per place. [2024-06-14 13:53:03,158 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 127 selfloop transitions, 29 changer transitions 4/166 dead transitions. [2024-06-14 13:53:03,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 166 transitions, 1849 flow [2024-06-14 13:53:03,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:53:03,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-14 13:53:03,160 INFO L175 Difference]: Start difference. First operand has 149 places, 137 transitions, 1429 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:53:03,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 166 transitions, 1849 flow [2024-06-14 13:53:03,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 166 transitions, 1785 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:03,246 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 1401 flow [2024-06-14 13:53:03,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1401, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2024-06-14 13:53:03,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-14 13:53:03,247 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 1401 flow [2024-06-14 13:53:03,247 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) [2024-06-14 13:53:03,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:03,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:03,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:53:03,247 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:03,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:03,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1934854723, now seen corresponding path program 3 times [2024-06-14 13:53:03,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:03,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088368428] [2024-06-14 13:53:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:03,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:03,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:03,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088368428] [2024-06-14 13:53:03,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088368428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:03,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:03,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:03,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680332777] [2024-06-14 13:53:03,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:03,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:03,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:03,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:03,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:03,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:03,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 1401 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) [2024-06-14 13:53:03,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:03,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:03,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:04,051 INFO L124 PetriNetUnfolderBase]: 1996/3490 cut-off events. [2024-06-14 13:53:04,051 INFO L125 PetriNetUnfolderBase]: For 103517/103531 co-relation queries the response was YES. [2024-06-14 13:53:04,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18812 conditions, 3490 events. 1996/3490 cut-off events. For 103517/103531 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22756 event pairs, 765 based on Foata normal form. 11/3497 useless extension candidates. Maximal degree in co-relation 18737. Up to 3083 conditions per place. [2024-06-14 13:53:04,073 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 112 selfloop transitions, 38 changer transitions 2/158 dead transitions. [2024-06-14 13:53:04,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 158 transitions, 1769 flow [2024-06-14 13:53:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 13:53:04,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 13:53:04,074 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 1401 flow. Second operand 9 states and 192 transitions. [2024-06-14 13:53:04,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 158 transitions, 1769 flow [2024-06-14 13:53:04,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 158 transitions, 1686 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:04,158 INFO L231 Difference]: Finished difference. Result has 152 places, 133 transitions, 1377 flow [2024-06-14 13:53:04,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=152, PETRI_TRANSITIONS=133} [2024-06-14 13:53:04,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-14 13:53:04,159 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 133 transitions, 1377 flow [2024-06-14 13:53:04,159 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) [2024-06-14 13:53:04,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:04,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:04,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:53:04,160 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:04,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:04,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1935220709, now seen corresponding path program 1 times [2024-06-14 13:53:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:04,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689471599] [2024-06-14 13:53:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:04,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:04,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:04,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689471599] [2024-06-14 13:53:04,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689471599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:04,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:04,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:04,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747674487] [2024-06-14 13:53:04,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:04,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:04,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:04,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:04,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 133 transitions, 1377 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) [2024-06-14 13:53:04,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:04,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:04,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:04,944 INFO L124 PetriNetUnfolderBase]: 2037/3577 cut-off events. [2024-06-14 13:53:04,945 INFO L125 PetriNetUnfolderBase]: For 126741/126755 co-relation queries the response was YES. [2024-06-14 13:53:04,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19144 conditions, 3577 events. 2037/3577 cut-off events. For 126741/126755 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 23506 event pairs, 673 based on Foata normal form. 46/3619 useless extension candidates. Maximal degree in co-relation 19069. Up to 2699 conditions per place. [2024-06-14 13:53:04,970 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 129 selfloop transitions, 35 changer transitions 5/175 dead transitions. [2024-06-14 13:53:04,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 175 transitions, 1938 flow [2024-06-14 13:53:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:53:04,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 13:53:04,971 INFO L175 Difference]: Start difference. First operand has 152 places, 133 transitions, 1377 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:53:04,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 175 transitions, 1938 flow [2024-06-14 13:53:05,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 175 transitions, 1829 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:05,057 INFO L231 Difference]: Finished difference. Result has 152 places, 138 transitions, 1431 flow [2024-06-14 13:53:05,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1431, PETRI_PLACES=152, PETRI_TRANSITIONS=138} [2024-06-14 13:53:05,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-14 13:53:05,058 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 138 transitions, 1431 flow [2024-06-14 13:53:05,058 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) [2024-06-14 13:53:05,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:05,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:05,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:53:05,059 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:05,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:05,060 INFO L85 PathProgramCache]: Analyzing trace with hash 551600133, now seen corresponding path program 4 times [2024-06-14 13:53:05,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:05,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171106189] [2024-06-14 13:53:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:05,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:05,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:05,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171106189] [2024-06-14 13:53:05,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171106189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:05,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:05,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915662120] [2024-06-14 13:53:05,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:05,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:05,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:05,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:05,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 138 transitions, 1431 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) [2024-06-14 13:53:05,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:05,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:05,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:05,863 INFO L124 PetriNetUnfolderBase]: 1982/3472 cut-off events. [2024-06-14 13:53:05,864 INFO L125 PetriNetUnfolderBase]: For 137851/137859 co-relation queries the response was YES. [2024-06-14 13:53:05,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19302 conditions, 3472 events. 1982/3472 cut-off events. For 137851/137859 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22535 event pairs, 754 based on Foata normal form. 48/3514 useless extension candidates. Maximal degree in co-relation 19225. Up to 2838 conditions per place. [2024-06-14 13:53:05,886 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 111 selfloop transitions, 51 changer transitions 3/171 dead transitions. [2024-06-14 13:53:05,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 171 transitions, 2219 flow [2024-06-14 13:53:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-14 13:53:05,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-14 13:53:05,887 INFO L175 Difference]: Start difference. First operand has 152 places, 138 transitions, 1431 flow. Second operand 9 states and 203 transitions. [2024-06-14 13:53:05,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 171 transitions, 2219 flow [2024-06-14 13:53:05,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 171 transitions, 2120 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:05,995 INFO L231 Difference]: Finished difference. Result has 154 places, 139 transitions, 1482 flow [2024-06-14 13:53:05,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1482, PETRI_PLACES=154, PETRI_TRANSITIONS=139} [2024-06-14 13:53:05,996 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-14 13:53:05,996 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 139 transitions, 1482 flow [2024-06-14 13:53:05,996 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) [2024-06-14 13:53:05,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:05,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:05,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:53:05,997 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:05,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:05,997 INFO L85 PathProgramCache]: Analyzing trace with hash -500853945, now seen corresponding path program 1 times [2024-06-14 13:53:05,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:05,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226156385] [2024-06-14 13:53:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:05,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:06,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226156385] [2024-06-14 13:53:06,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226156385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:06,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:06,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:06,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184763313] [2024-06-14 13:53:06,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:06,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:06,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:06,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:06,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:06,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 139 transitions, 1482 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) [2024-06-14 13:53:06,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:06,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:06,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:06,621 INFO L124 PetriNetUnfolderBase]: 1969/3451 cut-off events. [2024-06-14 13:53:06,621 INFO L125 PetriNetUnfolderBase]: For 114201/114212 co-relation queries the response was YES. [2024-06-14 13:53:06,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19193 conditions, 3451 events. 1969/3451 cut-off events. For 114201/114212 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22407 event pairs, 755 based on Foata normal form. 9/3451 useless extension candidates. Maximal degree in co-relation 19116. Up to 3075 conditions per place. [2024-06-14 13:53:06,646 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 126 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-14 13:53:06,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 157 transitions, 1918 flow [2024-06-14 13:53:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:53:06,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-14 13:53:06,647 INFO L175 Difference]: Start difference. First operand has 154 places, 139 transitions, 1482 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:53:06,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 157 transitions, 1918 flow [2024-06-14 13:53:06,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 157 transitions, 1776 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:06,766 INFO L231 Difference]: Finished difference. Result has 153 places, 139 transitions, 1396 flow [2024-06-14 13:53:06,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1396, PETRI_PLACES=153, PETRI_TRANSITIONS=139} [2024-06-14 13:53:06,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-14 13:53:06,766 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 139 transitions, 1396 flow [2024-06-14 13:53:06,766 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) [2024-06-14 13:53:06,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:06,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:06,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:53:06,767 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:06,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:06,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1811982433, now seen corresponding path program 2 times [2024-06-14 13:53:06,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:06,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344876528] [2024-06-14 13:53:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:06,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:06,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:06,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344876528] [2024-06-14 13:53:06,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344876528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:06,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:06,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:06,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353753450] [2024-06-14 13:53:06,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:06,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:06,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:06,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:06,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:07,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:07,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 139 transitions, 1396 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) [2024-06-14 13:53:07,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:07,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:07,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:07,435 INFO L124 PetriNetUnfolderBase]: 1966/3451 cut-off events. [2024-06-14 13:53:07,435 INFO L125 PetriNetUnfolderBase]: For 116306/116314 co-relation queries the response was YES. [2024-06-14 13:53:07,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18863 conditions, 3451 events. 1966/3451 cut-off events. For 116306/116314 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22436 event pairs, 765 based on Foata normal form. 7/3452 useless extension candidates. Maximal degree in co-relation 18785. Up to 3072 conditions per place. [2024-06-14 13:53:07,460 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 118 selfloop transitions, 27 changer transitions 0/151 dead transitions. [2024-06-14 13:53:07,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 151 transitions, 1742 flow [2024-06-14 13:53:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 13:53:07,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2024-06-14 13:53:07,461 INFO L175 Difference]: Start difference. First operand has 153 places, 139 transitions, 1396 flow. Second operand 6 states and 131 transitions. [2024-06-14 13:53:07,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 151 transitions, 1742 flow [2024-06-14 13:53:07,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 151 transitions, 1670 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:07,585 INFO L231 Difference]: Finished difference. Result has 154 places, 139 transitions, 1384 flow [2024-06-14 13:53:07,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1384, PETRI_PLACES=154, PETRI_TRANSITIONS=139} [2024-06-14 13:53:07,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-14 13:53:07,586 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 139 transitions, 1384 flow [2024-06-14 13:53:07,586 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) [2024-06-14 13:53:07,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:07,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:07,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:53:07,586 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:07,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash 551603109, now seen corresponding path program 4 times [2024-06-14 13:53:07,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:07,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696747773] [2024-06-14 13:53:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:07,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:07,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696747773] [2024-06-14 13:53:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696747773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:07,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:07,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758257602] [2024-06-14 13:53:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:07,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:07,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:07,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:07,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 139 transitions, 1384 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) [2024-06-14 13:53:07,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:07,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:07,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:08,286 INFO L124 PetriNetUnfolderBase]: 1963/3446 cut-off events. [2024-06-14 13:53:08,286 INFO L125 PetriNetUnfolderBase]: For 120669/120677 co-relation queries the response was YES. [2024-06-14 13:53:08,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18911 conditions, 3446 events. 1963/3446 cut-off events. For 120669/120677 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22373 event pairs, 764 based on Foata normal form. 7/3447 useless extension candidates. Maximal degree in co-relation 18832. Up to 2977 conditions per place. [2024-06-14 13:53:08,315 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 64 changer transitions 0/168 dead transitions. [2024-06-14 13:53:08,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 168 transitions, 2032 flow [2024-06-14 13:53:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 13:53:08,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-14 13:53:08,316 INFO L175 Difference]: Start difference. First operand has 154 places, 139 transitions, 1384 flow. Second operand 9 states and 196 transitions. [2024-06-14 13:53:08,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 168 transitions, 2032 flow [2024-06-14 13:53:08,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 168 transitions, 1952 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:08,459 INFO L231 Difference]: Finished difference. Result has 158 places, 145 transitions, 1549 flow [2024-06-14 13:53:08,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1549, PETRI_PLACES=158, PETRI_TRANSITIONS=145} [2024-06-14 13:53:08,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-14 13:53:08,460 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 145 transitions, 1549 flow [2024-06-14 13:53:08,460 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) [2024-06-14 13:53:08,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:08,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:08,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:53:08,461 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:08,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2130767047, now seen corresponding path program 2 times [2024-06-14 13:53:08,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:08,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131566281] [2024-06-14 13:53:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:08,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:08,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:08,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131566281] [2024-06-14 13:53:08,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131566281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:08,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:08,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:08,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455547888] [2024-06-14 13:53:08,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:08,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:08,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:08,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:08,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:08,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:08,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 145 transitions, 1549 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) [2024-06-14 13:53:08,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:08,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:08,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:09,282 INFO L124 PetriNetUnfolderBase]: 2079/3662 cut-off events. [2024-06-14 13:53:09,282 INFO L125 PetriNetUnfolderBase]: For 160647/160655 co-relation queries the response was YES. [2024-06-14 13:53:09,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20735 conditions, 3662 events. 2079/3662 cut-off events. For 160647/160655 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24154 event pairs, 764 based on Foata normal form. 42/3698 useless extension candidates. Maximal degree in co-relation 20655. Up to 2798 conditions per place. [2024-06-14 13:53:09,311 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 119 selfloop transitions, 55 changer transitions 6/186 dead transitions. [2024-06-14 13:53:09,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 186 transitions, 2323 flow [2024-06-14 13:53:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 13:53:09,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-14 13:53:09,312 INFO L175 Difference]: Start difference. First operand has 158 places, 145 transitions, 1549 flow. Second operand 10 states and 223 transitions. [2024-06-14 13:53:09,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 186 transitions, 2323 flow [2024-06-14 13:53:09,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 186 transitions, 2209 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:09,478 INFO L231 Difference]: Finished difference. Result has 164 places, 149 transitions, 1638 flow [2024-06-14 13:53:09,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1638, PETRI_PLACES=164, PETRI_TRANSITIONS=149} [2024-06-14 13:53:09,479 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-14 13:53:09,479 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 149 transitions, 1638 flow [2024-06-14 13:53:09,479 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) [2024-06-14 13:53:09,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:09,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:09,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:53:09,479 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:09,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 965275975, now seen corresponding path program 3 times [2024-06-14 13:53:09,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:09,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219098587] [2024-06-14 13:53:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:09,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:09,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:09,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219098587] [2024-06-14 13:53:09,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219098587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:09,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:09,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:09,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938549074] [2024-06-14 13:53:09,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:09,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:09,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:09,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:09,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:09,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 149 transitions, 1638 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) [2024-06-14 13:53:09,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:09,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:09,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:10,384 INFO L124 PetriNetUnfolderBase]: 2259/3962 cut-off events. [2024-06-14 13:53:10,384 INFO L125 PetriNetUnfolderBase]: For 189684/189692 co-relation queries the response was YES. [2024-06-14 13:53:10,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23252 conditions, 3962 events. 2259/3962 cut-off events. For 189684/189692 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26369 event pairs, 791 based on Foata normal form. 42/3998 useless extension candidates. Maximal degree in co-relation 23169. Up to 2416 conditions per place. [2024-06-14 13:53:10,416 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 64 changer transitions 8/192 dead transitions. [2024-06-14 13:53:10,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 192 transitions, 2516 flow [2024-06-14 13:53:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 13:53:10,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-14 13:53:10,417 INFO L175 Difference]: Start difference. First operand has 164 places, 149 transitions, 1638 flow. Second operand 9 states and 211 transitions. [2024-06-14 13:53:10,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 192 transitions, 2516 flow [2024-06-14 13:53:10,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 192 transitions, 2359 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:10,606 INFO L231 Difference]: Finished difference. Result has 167 places, 152 transitions, 1682 flow [2024-06-14 13:53:10,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1682, PETRI_PLACES=167, PETRI_TRANSITIONS=152} [2024-06-14 13:53:10,607 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-14 13:53:10,607 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 152 transitions, 1682 flow [2024-06-14 13:53:10,607 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) [2024-06-14 13:53:10,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:10,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:10,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:53:10,607 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:10,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1351148667, now seen corresponding path program 1 times [2024-06-14 13:53:10,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:10,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914603576] [2024-06-14 13:53:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:10,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:10,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:10,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914603576] [2024-06-14 13:53:10,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914603576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:10,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:10,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862242513] [2024-06-14 13:53:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:10,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:10,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:10,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 152 transitions, 1682 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) [2024-06-14 13:53:10,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:10,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:10,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:11,257 INFO L124 PetriNetUnfolderBase]: 1993/3500 cut-off events. [2024-06-14 13:53:11,257 INFO L125 PetriNetUnfolderBase]: For 165410/165410 co-relation queries the response was YES. [2024-06-14 13:53:11,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21397 conditions, 3500 events. 1993/3500 cut-off events. For 165410/165410 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22786 event pairs, 735 based on Foata normal form. 6/3501 useless extension candidates. Maximal degree in co-relation 21312. Up to 3090 conditions per place. [2024-06-14 13:53:11,288 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 157 selfloop transitions, 12 changer transitions 0/175 dead transitions. [2024-06-14 13:53:11,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 175 transitions, 2213 flow [2024-06-14 13:53:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 13:53:11,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-14 13:53:11,293 INFO L175 Difference]: Start difference. First operand has 167 places, 152 transitions, 1682 flow. Second operand 5 states and 118 transitions. [2024-06-14 13:53:11,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 175 transitions, 2213 flow [2024-06-14 13:53:11,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 175 transitions, 1972 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:11,483 INFO L231 Difference]: Finished difference. Result has 166 places, 153 transitions, 1498 flow [2024-06-14 13:53:11,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1498, PETRI_PLACES=166, PETRI_TRANSITIONS=153} [2024-06-14 13:53:11,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-14 13:53:11,484 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 153 transitions, 1498 flow [2024-06-14 13:53:11,484 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) [2024-06-14 13:53:11,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:11,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:11,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:53:11,484 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:11,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:11,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1811551905, now seen corresponding path program 1 times [2024-06-14 13:53:11,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:11,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838669377] [2024-06-14 13:53:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:11,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:11,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:11,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838669377] [2024-06-14 13:53:11,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838669377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:11,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:11,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:11,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017449881] [2024-06-14 13:53:11,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:11,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:11,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:11,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 153 transitions, 1498 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) [2024-06-14 13:53:11,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:11,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:11,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:12,142 INFO L124 PetriNetUnfolderBase]: 1853/3268 cut-off events. [2024-06-14 13:53:12,142 INFO L125 PetriNetUnfolderBase]: For 136431/136431 co-relation queries the response was YES. [2024-06-14 13:53:12,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18613 conditions, 3268 events. 1853/3268 cut-off events. For 136431/136431 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20943 event pairs, 656 based on Foata normal form. 6/3269 useless extension candidates. Maximal degree in co-relation 18528. Up to 2879 conditions per place. [2024-06-14 13:53:12,171 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 155 selfloop transitions, 13 changer transitions 0/174 dead transitions. [2024-06-14 13:53:12,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 174 transitions, 1910 flow [2024-06-14 13:53:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-14 13:53:12,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-14 13:53:12,172 INFO L175 Difference]: Start difference. First operand has 166 places, 153 transitions, 1498 flow. Second operand 5 states and 117 transitions. [2024-06-14 13:53:12,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 174 transitions, 1910 flow [2024-06-14 13:53:12,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 174 transitions, 1889 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:12,301 INFO L231 Difference]: Finished difference. Result has 169 places, 153 transitions, 1508 flow [2024-06-14 13:53:12,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1508, PETRI_PLACES=169, PETRI_TRANSITIONS=153} [2024-06-14 13:53:12,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-14 13:53:12,302 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 153 transitions, 1508 flow [2024-06-14 13:53:12,302 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) [2024-06-14 13:53:12,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:12,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:12,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:53:12,302 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:12,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash 372664523, now seen corresponding path program 1 times [2024-06-14 13:53:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853536062] [2024-06-14 13:53:12,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:12,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:12,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:12,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853536062] [2024-06-14 13:53:12,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853536062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:12,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:12,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:12,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429536481] [2024-06-14 13:53:12,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:12,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:12,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:12,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:12,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:12,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 153 transitions, 1508 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) [2024-06-14 13:53:12,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:12,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:12,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:13,061 INFO L124 PetriNetUnfolderBase]: 1858/3287 cut-off events. [2024-06-14 13:53:13,062 INFO L125 PetriNetUnfolderBase]: For 137577/137586 co-relation queries the response was YES. [2024-06-14 13:53:13,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18788 conditions, 3287 events. 1858/3287 cut-off events. For 137577/137586 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21189 event pairs, 708 based on Foata normal form. 8/3287 useless extension candidates. Maximal degree in co-relation 18702. Up to 2855 conditions per place. [2024-06-14 13:53:13,090 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 136 selfloop transitions, 46 changer transitions 0/188 dead transitions. [2024-06-14 13:53:13,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 188 transitions, 2156 flow [2024-06-14 13:53:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-14 13:53:13,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-14 13:53:13,091 INFO L175 Difference]: Start difference. First operand has 169 places, 153 transitions, 1508 flow. Second operand 11 states and 232 transitions. [2024-06-14 13:53:13,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 188 transitions, 2156 flow [2024-06-14 13:53:13,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 188 transitions, 2122 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:13,287 INFO L231 Difference]: Finished difference. Result has 176 places, 156 transitions, 1598 flow [2024-06-14 13:53:13,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1474, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1598, PETRI_PLACES=176, PETRI_TRANSITIONS=156} [2024-06-14 13:53:13,288 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-14 13:53:13,288 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 156 transitions, 1598 flow [2024-06-14 13:53:13,288 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) [2024-06-14 13:53:13,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:13,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:13,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:53:13,288 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:13,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash 197109937, now seen corresponding path program 2 times [2024-06-14 13:53:13,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739514874] [2024-06-14 13:53:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:13,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739514874] [2024-06-14 13:53:13,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739514874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:13,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:13,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:13,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705018516] [2024-06-14 13:53:13,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:13,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:13,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:13,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:13,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:13,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:13,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 156 transitions, 1598 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) [2024-06-14 13:53:13,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:13,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:13,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:14,041 INFO L124 PetriNetUnfolderBase]: 1855/3283 cut-off events. [2024-06-14 13:53:14,041 INFO L125 PetriNetUnfolderBase]: For 142034/142043 co-relation queries the response was YES. [2024-06-14 13:53:14,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18892 conditions, 3283 events. 1855/3283 cut-off events. For 142034/142043 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21171 event pairs, 708 based on Foata normal form. 8/3283 useless extension candidates. Maximal degree in co-relation 18805. Up to 2852 conditions per place. [2024-06-14 13:53:14,071 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 46 changer transitions 0/187 dead transitions. [2024-06-14 13:53:14,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 187 transitions, 2128 flow [2024-06-14 13:53:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 13:53:14,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 13:53:14,073 INFO L175 Difference]: Start difference. First operand has 176 places, 156 transitions, 1598 flow. Second operand 11 states and 231 transitions. [2024-06-14 13:53:14,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 187 transitions, 2128 flow [2024-06-14 13:53:14,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 187 transitions, 2008 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:14,321 INFO L231 Difference]: Finished difference. Result has 178 places, 156 transitions, 1578 flow [2024-06-14 13:53:14,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1578, PETRI_PLACES=178, PETRI_TRANSITIONS=156} [2024-06-14 13:53:14,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-14 13:53:14,321 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 156 transitions, 1578 flow [2024-06-14 13:53:14,321 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) [2024-06-14 13:53:14,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:14,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:14,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:53:14,322 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:14,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash -336885053, now seen corresponding path program 3 times [2024-06-14 13:53:14,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:14,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406529167] [2024-06-14 13:53:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:14,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:14,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406529167] [2024-06-14 13:53:14,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406529167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:14,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:14,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:14,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618175863] [2024-06-14 13:53:14,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:14,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:14,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:14,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:14,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:14,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:14,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 156 transitions, 1578 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) [2024-06-14 13:53:14,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:14,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:14,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:15,103 INFO L124 PetriNetUnfolderBase]: 1860/3295 cut-off events. [2024-06-14 13:53:15,103 INFO L125 PetriNetUnfolderBase]: For 142085/142093 co-relation queries the response was YES. [2024-06-14 13:53:15,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18922 conditions, 3295 events. 1860/3295 cut-off events. For 142085/142093 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21281 event pairs, 714 based on Foata normal form. 7/3297 useless extension candidates. Maximal degree in co-relation 18834. Up to 2858 conditions per place. [2024-06-14 13:53:15,132 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 124 selfloop transitions, 52 changer transitions 0/182 dead transitions. [2024-06-14 13:53:15,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 182 transitions, 2107 flow [2024-06-14 13:53:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 13:53:15,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-14 13:53:15,134 INFO L175 Difference]: Start difference. First operand has 178 places, 156 transitions, 1578 flow. Second operand 11 states and 225 transitions. [2024-06-14 13:53:15,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 182 transitions, 2107 flow [2024-06-14 13:53:15,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 182 transitions, 2009 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:15,319 INFO L231 Difference]: Finished difference. Result has 179 places, 159 transitions, 1619 flow [2024-06-14 13:53:15,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1619, PETRI_PLACES=179, PETRI_TRANSITIONS=159} [2024-06-14 13:53:15,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-14 13:53:15,320 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 159 transitions, 1619 flow [2024-06-14 13:53:15,320 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) [2024-06-14 13:53:15,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:15,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:15,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:53:15,320 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:15,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash -176919699, now seen corresponding path program 4 times [2024-06-14 13:53:15,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:15,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101165523] [2024-06-14 13:53:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:15,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:15,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:15,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101165523] [2024-06-14 13:53:15,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101165523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:15,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:15,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:15,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192367300] [2024-06-14 13:53:15,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:15,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:15,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:15,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:15,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:15,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 159 transitions, 1619 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) [2024-06-14 13:53:15,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:15,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:15,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:16,110 INFO L124 PetriNetUnfolderBase]: 1857/3291 cut-off events. [2024-06-14 13:53:16,111 INFO L125 PetriNetUnfolderBase]: For 146554/146562 co-relation queries the response was YES. [2024-06-14 13:53:16,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18980 conditions, 3291 events. 1857/3291 cut-off events. For 146554/146562 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21226 event pairs, 714 based on Foata normal form. 7/3293 useless extension candidates. Maximal degree in co-relation 18891. Up to 2855 conditions per place. [2024-06-14 13:53:16,138 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 123 selfloop transitions, 52 changer transitions 0/181 dead transitions. [2024-06-14 13:53:16,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 181 transitions, 2023 flow [2024-06-14 13:53:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 13:53:16,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-06-14 13:53:16,140 INFO L175 Difference]: Start difference. First operand has 179 places, 159 transitions, 1619 flow. Second operand 11 states and 224 transitions. [2024-06-14 13:53:16,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 181 transitions, 2023 flow [2024-06-14 13:53:16,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 181 transitions, 1915 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:16,344 INFO L231 Difference]: Finished difference. Result has 181 places, 159 transitions, 1621 flow [2024-06-14 13:53:16,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1621, PETRI_PLACES=181, PETRI_TRANSITIONS=159} [2024-06-14 13:53:16,345 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 13:53:16,345 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 159 transitions, 1621 flow [2024-06-14 13:53:16,345 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) [2024-06-14 13:53:16,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:16,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:16,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:53:16,345 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:16,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash -80171517, now seen corresponding path program 5 times [2024-06-14 13:53:16,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:16,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321290158] [2024-06-14 13:53:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:16,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:16,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:16,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321290158] [2024-06-14 13:53:16,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321290158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:16,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:16,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:16,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217877893] [2024-06-14 13:53:16,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:16,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:16,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:16,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:16,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:16,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 159 transitions, 1621 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) [2024-06-14 13:53:16,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:16,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:16,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:17,072 INFO L124 PetriNetUnfolderBase]: 1854/3287 cut-off events. [2024-06-14 13:53:17,073 INFO L125 PetriNetUnfolderBase]: For 151083/151091 co-relation queries the response was YES. [2024-06-14 13:53:17,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19032 conditions, 3287 events. 1854/3287 cut-off events. For 151083/151091 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21194 event pairs, 714 based on Foata normal form. 7/3289 useless extension candidates. Maximal degree in co-relation 18942. Up to 2815 conditions per place. [2024-06-14 13:53:17,098 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 67 changer transitions 0/182 dead transitions. [2024-06-14 13:53:17,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 182 transitions, 2029 flow [2024-06-14 13:53:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:53:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:53:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-14 13:53:17,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-14 13:53:17,100 INFO L175 Difference]: Start difference. First operand has 181 places, 159 transitions, 1621 flow. Second operand 12 states and 242 transitions. [2024-06-14 13:53:17,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 182 transitions, 2029 flow [2024-06-14 13:53:17,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 182 transitions, 1925 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:17,308 INFO L231 Difference]: Finished difference. Result has 183 places, 159 transitions, 1657 flow [2024-06-14 13:53:17,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1657, PETRI_PLACES=183, PETRI_TRANSITIONS=159} [2024-06-14 13:53:17,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-14 13:53:17,309 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 159 transitions, 1657 flow [2024-06-14 13:53:17,309 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) [2024-06-14 13:53:17,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:17,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:17,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:53:17,309 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:17,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:17,310 INFO L85 PathProgramCache]: Analyzing trace with hash 956810938, now seen corresponding path program 1 times [2024-06-14 13:53:17,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:17,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854802762] [2024-06-14 13:53:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:17,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:17,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:17,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854802762] [2024-06-14 13:53:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854802762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:17,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:17,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:17,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792956868] [2024-06-14 13:53:17,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:17,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:17,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:17,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:17,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:17,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 159 transitions, 1657 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) [2024-06-14 13:53:17,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:17,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:17,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:18,055 INFO L124 PetriNetUnfolderBase]: 1841/3261 cut-off events. [2024-06-14 13:53:18,055 INFO L125 PetriNetUnfolderBase]: For 162779/162788 co-relation queries the response was YES. [2024-06-14 13:53:18,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18302 conditions, 3261 events. 1841/3261 cut-off events. For 162779/162788 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20908 event pairs, 535 based on Foata normal form. 31/3288 useless extension candidates. Maximal degree in co-relation 18211. Up to 1536 conditions per place. [2024-06-14 13:53:18,083 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 154 selfloop transitions, 33 changer transitions 14/207 dead transitions. [2024-06-14 13:53:18,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 207 transitions, 2459 flow [2024-06-14 13:53:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:18,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:53:18,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-14 13:53:18,084 INFO L175 Difference]: Start difference. First operand has 183 places, 159 transitions, 1657 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:53:18,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 207 transitions, 2459 flow [2024-06-14 13:53:18,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 207 transitions, 2289 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-14 13:53:18,269 INFO L231 Difference]: Finished difference. Result has 180 places, 155 transitions, 1523 flow [2024-06-14 13:53:18,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1523, PETRI_PLACES=180, PETRI_TRANSITIONS=155} [2024-06-14 13:53:18,270 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-14 13:53:18,270 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 155 transitions, 1523 flow [2024-06-14 13:53:18,270 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) [2024-06-14 13:53:18,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:18,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:18,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:53:18,271 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:18,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:18,271 INFO L85 PathProgramCache]: Analyzing trace with hash -795769312, now seen corresponding path program 2 times [2024-06-14 13:53:18,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:18,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667118529] [2024-06-14 13:53:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:18,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:18,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:18,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667118529] [2024-06-14 13:53:18,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667118529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:18,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:18,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499787432] [2024-06-14 13:53:18,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:18,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:18,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:18,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 155 transitions, 1523 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) [2024-06-14 13:53:18,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:18,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:18,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:19,098 INFO L124 PetriNetUnfolderBase]: 1872/3268 cut-off events. [2024-06-14 13:53:19,099 INFO L125 PetriNetUnfolderBase]: For 184751/184760 co-relation queries the response was YES. [2024-06-14 13:53:19,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20023 conditions, 3268 events. 1872/3268 cut-off events. For 184751/184760 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20694 event pairs, 595 based on Foata normal form. 13/3277 useless extension candidates. Maximal degree in co-relation 19931. Up to 1536 conditions per place. [2024-06-14 13:53:19,128 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 149 selfloop transitions, 33 changer transitions 11/199 dead transitions. [2024-06-14 13:53:19,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 199 transitions, 2307 flow [2024-06-14 13:53:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:53:19,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-14 13:53:19,129 INFO L175 Difference]: Start difference. First operand has 180 places, 155 transitions, 1523 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:53:19,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 199 transitions, 2307 flow [2024-06-14 13:53:19,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 199 transitions, 2224 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:19,386 INFO L231 Difference]: Finished difference. Result has 180 places, 153 transitions, 1512 flow [2024-06-14 13:53:19,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1512, PETRI_PLACES=180, PETRI_TRANSITIONS=153} [2024-06-14 13:53:19,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-14 13:53:19,387 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 153 transitions, 1512 flow [2024-06-14 13:53:19,387 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) [2024-06-14 13:53:19,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:19,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:19,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:53:19,387 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:19,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1944055328, now seen corresponding path program 3 times [2024-06-14 13:53:19,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:19,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374687889] [2024-06-14 13:53:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:19,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:19,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:19,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374687889] [2024-06-14 13:53:19,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374687889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:19,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:19,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218348550] [2024-06-14 13:53:19,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:19,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:19,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:19,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:19,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:19,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 153 transitions, 1512 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) [2024-06-14 13:53:19,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:19,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:19,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:20,271 INFO L124 PetriNetUnfolderBase]: 1755/3082 cut-off events. [2024-06-14 13:53:20,271 INFO L125 PetriNetUnfolderBase]: For 170303/170312 co-relation queries the response was YES. [2024-06-14 13:53:20,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17684 conditions, 3082 events. 1755/3082 cut-off events. For 170303/170312 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19495 event pairs, 587 based on Foata normal form. 37/3115 useless extension candidates. Maximal degree in co-relation 17592. Up to 1896 conditions per place. [2024-06-14 13:53:20,298 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 29 changer transitions 18/191 dead transitions. [2024-06-14 13:53:20,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 191 transitions, 2130 flow [2024-06-14 13:53:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:53:20,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-14 13:53:20,300 INFO L175 Difference]: Start difference. First operand has 180 places, 153 transitions, 1512 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:53:20,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 191 transitions, 2130 flow [2024-06-14 13:53:20,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 191 transitions, 2048 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:20,493 INFO L231 Difference]: Finished difference. Result has 177 places, 145 transitions, 1411 flow [2024-06-14 13:53:20,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1411, PETRI_PLACES=177, PETRI_TRANSITIONS=145} [2024-06-14 13:53:20,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-14 13:53:20,493 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 145 transitions, 1411 flow [2024-06-14 13:53:20,493 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) [2024-06-14 13:53:20,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:20,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:20,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:53:20,494 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:20,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:20,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1952626208, now seen corresponding path program 4 times [2024-06-14 13:53:20,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:20,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438334120] [2024-06-14 13:53:20,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:20,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:20,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:20,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438334120] [2024-06-14 13:53:20,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438334120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:20,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:20,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374591682] [2024-06-14 13:53:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:20,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:20,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:20,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:20,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 145 transitions, 1411 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) [2024-06-14 13:53:20,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:20,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:20,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:21,201 INFO L124 PetriNetUnfolderBase]: 1513/2663 cut-off events. [2024-06-14 13:53:21,201 INFO L125 PetriNetUnfolderBase]: For 132154/132163 co-relation queries the response was YES. [2024-06-14 13:53:21,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14682 conditions, 2663 events. 1513/2663 cut-off events. For 132154/132163 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16384 event pairs, 521 based on Foata normal form. 41/2700 useless extension candidates. Maximal degree in co-relation 14592. Up to 2152 conditions per place. [2024-06-14 13:53:21,230 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 124 selfloop transitions, 25 changer transitions 19/174 dead transitions. [2024-06-14 13:53:21,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 174 transitions, 1861 flow [2024-06-14 13:53:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:53:21,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-14 13:53:21,232 INFO L175 Difference]: Start difference. First operand has 177 places, 145 transitions, 1411 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:53:21,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 174 transitions, 1861 flow [2024-06-14 13:53:21,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 174 transitions, 1784 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:21,402 INFO L231 Difference]: Finished difference. Result has 171 places, 138 transitions, 1327 flow [2024-06-14 13:53:21,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1327, PETRI_PLACES=171, PETRI_TRANSITIONS=138} [2024-06-14 13:53:21,403 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-14 13:53:21,403 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 138 transitions, 1327 flow [2024-06-14 13:53:21,403 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) [2024-06-14 13:53:21,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:21,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:21,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:53:21,404 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:21,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash -566080702, now seen corresponding path program 5 times [2024-06-14 13:53:21,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:21,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376237034] [2024-06-14 13:53:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:21,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:21,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:21,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376237034] [2024-06-14 13:53:21,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376237034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:21,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:21,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:21,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577871347] [2024-06-14 13:53:21,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:21,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:21,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:21,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:21,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:21,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:21,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 138 transitions, 1327 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) [2024-06-14 13:53:21,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:21,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:21,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:22,166 INFO L124 PetriNetUnfolderBase]: 1463/2546 cut-off events. [2024-06-14 13:53:22,166 INFO L125 PetriNetUnfolderBase]: For 102491/102499 co-relation queries the response was YES. [2024-06-14 13:53:22,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14428 conditions, 2546 events. 1463/2546 cut-off events. For 102491/102499 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15313 event pairs, 465 based on Foata normal form. 14/2556 useless extension candidates. Maximal degree in co-relation 14342. Up to 2124 conditions per place. [2024-06-14 13:53:22,185 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 130 selfloop transitions, 23 changer transitions 9/168 dead transitions. [2024-06-14 13:53:22,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 168 transitions, 1873 flow [2024-06-14 13:53:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 13:53:22,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-14 13:53:22,186 INFO L175 Difference]: Start difference. First operand has 171 places, 138 transitions, 1327 flow. Second operand 8 states and 175 transitions. [2024-06-14 13:53:22,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 168 transitions, 1873 flow [2024-06-14 13:53:22,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 168 transitions, 1803 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:22,338 INFO L231 Difference]: Finished difference. Result has 166 places, 136 transitions, 1295 flow [2024-06-14 13:53:22,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1295, PETRI_PLACES=166, PETRI_TRANSITIONS=136} [2024-06-14 13:53:22,338 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-14 13:53:22,339 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 136 transitions, 1295 flow [2024-06-14 13:53:22,339 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) [2024-06-14 13:53:22,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:22,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:22,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:53:22,339 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:22,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash 377702518, now seen corresponding path program 6 times [2024-06-14 13:53:22,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:22,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627052751] [2024-06-14 13:53:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:22,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:22,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:22,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627052751] [2024-06-14 13:53:22,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627052751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:22,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:22,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:22,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539377729] [2024-06-14 13:53:22,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:22,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:22,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:22,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:22,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 136 transitions, 1295 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) [2024-06-14 13:53:22,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:22,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:22,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:22,984 INFO L124 PetriNetUnfolderBase]: 1385/2444 cut-off events. [2024-06-14 13:53:22,985 INFO L125 PetriNetUnfolderBase]: For 83321/83329 co-relation queries the response was YES. [2024-06-14 13:53:22,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13306 conditions, 2444 events. 1385/2444 cut-off events. For 83321/83329 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14739 event pairs, 481 based on Foata normal form. 14/2454 useless extension candidates. Maximal degree in co-relation 13222. Up to 2100 conditions per place. [2024-06-14 13:53:23,002 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 116 selfloop transitions, 18 changer transitions 19/159 dead transitions. [2024-06-14 13:53:23,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 159 transitions, 1677 flow [2024-06-14 13:53:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 13:53:23,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 13:53:23,003 INFO L175 Difference]: Start difference. First operand has 166 places, 136 transitions, 1295 flow. Second operand 8 states and 168 transitions. [2024-06-14 13:53:23,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 159 transitions, 1677 flow [2024-06-14 13:53:23,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 159 transitions, 1624 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:23,097 INFO L231 Difference]: Finished difference. Result has 165 places, 130 transitions, 1213 flow [2024-06-14 13:53:23,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1213, PETRI_PLACES=165, PETRI_TRANSITIONS=130} [2024-06-14 13:53:23,098 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-14 13:53:23,098 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 130 transitions, 1213 flow [2024-06-14 13:53:23,098 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) [2024-06-14 13:53:23,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:23,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:23,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:53:23,098 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:23,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash -328210588, now seen corresponding path program 7 times [2024-06-14 13:53:23,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:23,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000493588] [2024-06-14 13:53:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:23,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:23,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000493588] [2024-06-14 13:53:23,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000493588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:23,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:23,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:23,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305591072] [2024-06-14 13:53:23,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:23,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:23,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:23,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:23,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:23,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:23,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 130 transitions, 1213 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) [2024-06-14 13:53:23,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:23,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:23,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:23,709 INFO L124 PetriNetUnfolderBase]: 1304/2285 cut-off events. [2024-06-14 13:53:23,709 INFO L125 PetriNetUnfolderBase]: For 72227/72228 co-relation queries the response was YES. [2024-06-14 13:53:23,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12145 conditions, 2285 events. 1304/2285 cut-off events. For 72227/72228 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13483 event pairs, 445 based on Foata normal form. 9/2290 useless extension candidates. Maximal degree in co-relation 12062. Up to 1980 conditions per place. [2024-06-14 13:53:23,727 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 115 selfloop transitions, 16 changer transitions 10/147 dead transitions. [2024-06-14 13:53:23,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 147 transitions, 1555 flow [2024-06-14 13:53:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 13:53:23,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 13:53:23,729 INFO L175 Difference]: Start difference. First operand has 165 places, 130 transitions, 1213 flow. Second operand 8 states and 160 transitions. [2024-06-14 13:53:23,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 147 transitions, 1555 flow [2024-06-14 13:53:23,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 147 transitions, 1507 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:23,810 INFO L231 Difference]: Finished difference. Result has 158 places, 126 transitions, 1160 flow [2024-06-14 13:53:23,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1160, PETRI_PLACES=158, PETRI_TRANSITIONS=126} [2024-06-14 13:53:23,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-14 13:53:23,810 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 126 transitions, 1160 flow [2024-06-14 13:53:23,810 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) [2024-06-14 13:53:23,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:23,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:23,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:53:23,811 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:23,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1478290244, now seen corresponding path program 1 times [2024-06-14 13:53:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:23,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101367439] [2024-06-14 13:53:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:23,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:24,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:24,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101367439] [2024-06-14 13:53:24,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101367439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:24,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:24,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219466800] [2024-06-14 13:53:24,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:24,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:24,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:24,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:24,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 126 transitions, 1160 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) [2024-06-14 13:53:24,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:24,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:24,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:24,333 INFO L124 PetriNetUnfolderBase]: 1256/2205 cut-off events. [2024-06-14 13:53:24,333 INFO L125 PetriNetUnfolderBase]: For 69437/69438 co-relation queries the response was YES. [2024-06-14 13:53:24,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11998 conditions, 2205 events. 1256/2205 cut-off events. For 69437/69438 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12964 event pairs, 302 based on Foata normal form. 7/2208 useless extension candidates. Maximal degree in co-relation 11918. Up to 1744 conditions per place. [2024-06-14 13:53:24,352 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 117 selfloop transitions, 26 changer transitions 0/149 dead transitions. [2024-06-14 13:53:24,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 1630 flow [2024-06-14 13:53:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:53:24,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-14 13:53:24,354 INFO L175 Difference]: Start difference. First operand has 158 places, 126 transitions, 1160 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:53:24,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 149 transitions, 1630 flow [2024-06-14 13:53:24,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 149 transitions, 1563 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-14 13:53:24,428 INFO L231 Difference]: Finished difference. Result has 147 places, 128 transitions, 1199 flow [2024-06-14 13:53:24,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1199, PETRI_PLACES=147, PETRI_TRANSITIONS=128} [2024-06-14 13:53:24,428 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-14 13:53:24,429 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 128 transitions, 1199 flow [2024-06-14 13:53:24,429 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) [2024-06-14 13:53:24,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:24,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:24,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:53:24,429 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:24,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1359957664, now seen corresponding path program 1 times [2024-06-14 13:53:24,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:24,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951585881] [2024-06-14 13:53:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:24,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:24,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:24,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951585881] [2024-06-14 13:53:24,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951585881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:24,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:24,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:24,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876860303] [2024-06-14 13:53:24,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:24,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:24,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:24,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:24,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:24,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:24,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 128 transitions, 1199 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) [2024-06-14 13:53:24,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:24,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:24,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:25,055 INFO L124 PetriNetUnfolderBase]: 1243/2186 cut-off events. [2024-06-14 13:53:25,055 INFO L125 PetriNetUnfolderBase]: For 57862/57863 co-relation queries the response was YES. [2024-06-14 13:53:25,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11274 conditions, 2186 events. 1243/2186 cut-off events. For 57862/57863 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12852 event pairs, 295 based on Foata normal form. 7/2189 useless extension candidates. Maximal degree in co-relation 11199. Up to 1738 conditions per place. [2024-06-14 13:53:25,072 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 28 changer transitions 0/148 dead transitions. [2024-06-14 13:53:25,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 148 transitions, 1547 flow [2024-06-14 13:53:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 13:53:25,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 13:53:25,073 INFO L175 Difference]: Start difference. First operand has 147 places, 128 transitions, 1199 flow. Second operand 6 states and 136 transitions. [2024-06-14 13:53:25,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 148 transitions, 1547 flow [2024-06-14 13:53:25,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 148 transitions, 1503 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:25,135 INFO L231 Difference]: Finished difference. Result has 150 places, 128 transitions, 1219 flow [2024-06-14 13:53:25,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1219, PETRI_PLACES=150, PETRI_TRANSITIONS=128} [2024-06-14 13:53:25,135 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-14 13:53:25,136 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 128 transitions, 1219 flow [2024-06-14 13:53:25,136 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) [2024-06-14 13:53:25,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:25,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:25,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:53:25,136 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:25,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash 681495318, now seen corresponding path program 1 times [2024-06-14 13:53:25,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:25,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005533270] [2024-06-14 13:53:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:25,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:25,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:25,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005533270] [2024-06-14 13:53:25,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005533270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:25,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:25,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:25,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630251075] [2024-06-14 13:53:25,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:25,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:25,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:25,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:25,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 128 transitions, 1219 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) [2024-06-14 13:53:25,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:25,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:25,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:25,739 INFO L124 PetriNetUnfolderBase]: 1203/2094 cut-off events. [2024-06-14 13:53:25,739 INFO L125 PetriNetUnfolderBase]: For 53347/53348 co-relation queries the response was YES. [2024-06-14 13:53:25,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10710 conditions, 2094 events. 1203/2094 cut-off events. For 53347/53348 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12052 event pairs, 357 based on Foata normal form. 9/2099 useless extension candidates. Maximal degree in co-relation 10634. Up to 1732 conditions per place. [2024-06-14 13:53:25,753 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 13 changer transitions 16/149 dead transitions. [2024-06-14 13:53:25,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 1585 flow [2024-06-14 13:53:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 13:53:25,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-14 13:53:25,754 INFO L175 Difference]: Start difference. First operand has 150 places, 128 transitions, 1219 flow. Second operand 8 states and 162 transitions. [2024-06-14 13:53:25,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 149 transitions, 1585 flow [2024-06-14 13:53:25,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 149 transitions, 1504 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:25,821 INFO L231 Difference]: Finished difference. Result has 152 places, 123 transitions, 1108 flow [2024-06-14 13:53:25,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1108, PETRI_PLACES=152, PETRI_TRANSITIONS=123} [2024-06-14 13:53:25,822 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-14 13:53:25,822 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 123 transitions, 1108 flow [2024-06-14 13:53:25,822 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) [2024-06-14 13:53:25,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:25,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:25,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:53:25,822 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:25,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:25,823 INFO L85 PathProgramCache]: Analyzing trace with hash 26421414, now seen corresponding path program 2 times [2024-06-14 13:53:25,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:25,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008873228] [2024-06-14 13:53:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:25,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:26,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:26,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008873228] [2024-06-14 13:53:26,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008873228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:26,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:26,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213292761] [2024-06-14 13:53:26,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:26,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:26,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:26,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:26,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 123 transitions, 1108 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) [2024-06-14 13:53:26,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:26,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:26,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:26,396 INFO L124 PetriNetUnfolderBase]: 1077/1872 cut-off events. [2024-06-14 13:53:26,396 INFO L125 PetriNetUnfolderBase]: For 51621/51622 co-relation queries the response was YES. [2024-06-14 13:53:26,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9788 conditions, 1872 events. 1077/1872 cut-off events. For 51621/51622 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10351 event pairs, 257 based on Foata normal form. 7/1875 useless extension candidates. Maximal degree in co-relation 9712. Up to 1568 conditions per place. [2024-06-14 13:53:26,409 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 113 selfloop transitions, 23 changer transitions 0/142 dead transitions. [2024-06-14 13:53:26,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 142 transitions, 1462 flow [2024-06-14 13:53:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 13:53:26,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-14 13:53:26,410 INFO L175 Difference]: Start difference. First operand has 152 places, 123 transitions, 1108 flow. Second operand 8 states and 162 transitions. [2024-06-14 13:53:26,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 142 transitions, 1462 flow [2024-06-14 13:53:26,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 142 transitions, 1412 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-14 13:53:26,459 INFO L231 Difference]: Finished difference. Result has 141 places, 124 transitions, 1142 flow [2024-06-14 13:53:26,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=141, PETRI_TRANSITIONS=124} [2024-06-14 13:53:26,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-14 13:53:26,460 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 124 transitions, 1142 flow [2024-06-14 13:53:26,460 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) [2024-06-14 13:53:26,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:26,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:26,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:53:26,461 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:26,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 26416764, now seen corresponding path program 3 times [2024-06-14 13:53:26,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:26,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269015133] [2024-06-14 13:53:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:26,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:26,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:26,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269015133] [2024-06-14 13:53:26,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269015133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:26,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:26,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:26,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929147102] [2024-06-14 13:53:26,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:26,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:26,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:26,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:26,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:26,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:26,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 124 transitions, 1142 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) [2024-06-14 13:53:26,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:26,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:26,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:27,068 INFO L124 PetriNetUnfolderBase]: 1097/1896 cut-off events. [2024-06-14 13:53:27,069 INFO L125 PetriNetUnfolderBase]: For 42729/42730 co-relation queries the response was YES. [2024-06-14 13:53:27,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9758 conditions, 1896 events. 1097/1896 cut-off events. For 42729/42730 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10487 event pairs, 262 based on Foata normal form. 7/1899 useless extension candidates. Maximal degree in co-relation 9688. Up to 1520 conditions per place. [2024-06-14 13:53:27,080 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 114 selfloop transitions, 25 changer transitions 0/145 dead transitions. [2024-06-14 13:53:27,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 145 transitions, 1510 flow [2024-06-14 13:53:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 13:53:27,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509375 [2024-06-14 13:53:27,081 INFO L175 Difference]: Start difference. First operand has 141 places, 124 transitions, 1142 flow. Second operand 8 states and 163 transitions. [2024-06-14 13:53:27,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 145 transitions, 1510 flow [2024-06-14 13:53:27,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 1424 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:27,126 INFO L231 Difference]: Finished difference. Result has 142 places, 125 transitions, 1140 flow [2024-06-14 13:53:27,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1140, PETRI_PLACES=142, PETRI_TRANSITIONS=125} [2024-06-14 13:53:27,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-14 13:53:27,126 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 125 transitions, 1140 flow [2024-06-14 13:53:27,126 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) [2024-06-14 13:53:27,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:27,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:27,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:53:27,127 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:27,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1812591868, now seen corresponding path program 2 times [2024-06-14 13:53:27,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:27,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132628294] [2024-06-14 13:53:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:27,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:27,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:27,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132628294] [2024-06-14 13:53:27,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132628294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:27,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:27,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:27,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453926510] [2024-06-14 13:53:27,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:27,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:27,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:27,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:27,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:27,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:27,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 125 transitions, 1140 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) [2024-06-14 13:53:27,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:27,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:27,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:27,711 INFO L124 PetriNetUnfolderBase]: 1117/1931 cut-off events. [2024-06-14 13:53:27,712 INFO L125 PetriNetUnfolderBase]: For 44694/44695 co-relation queries the response was YES. [2024-06-14 13:53:27,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9895 conditions, 1931 events. 1117/1931 cut-off events. For 44694/44695 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10769 event pairs, 342 based on Foata normal form. 7/1925 useless extension candidates. Maximal degree in co-relation 9825. Up to 1581 conditions per place. [2024-06-14 13:53:27,729 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 122 selfloop transitions, 24 changer transitions 0/152 dead transitions. [2024-06-14 13:53:27,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 152 transitions, 1604 flow [2024-06-14 13:53:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 13:53:27,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-14 13:53:27,731 INFO L175 Difference]: Start difference. First operand has 142 places, 125 transitions, 1140 flow. Second operand 8 states and 173 transitions. [2024-06-14 13:53:27,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 152 transitions, 1604 flow [2024-06-14 13:53:27,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 152 transitions, 1532 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:27,788 INFO L231 Difference]: Finished difference. Result has 144 places, 126 transitions, 1142 flow [2024-06-14 13:53:27,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2024-06-14 13:53:27,789 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-14 13:53:27,789 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 1142 flow [2024-06-14 13:53:27,789 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) [2024-06-14 13:53:27,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:27,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:27,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:53:27,789 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:27,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1815448828, now seen corresponding path program 3 times [2024-06-14 13:53:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:27,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832632009] [2024-06-14 13:53:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:27,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:28,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:28,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832632009] [2024-06-14 13:53:28,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832632009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:28,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:28,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:28,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69714039] [2024-06-14 13:53:28,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:28,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:28,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:28,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:28,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 1142 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) [2024-06-14 13:53:28,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:28,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:28,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:28,343 INFO L124 PetriNetUnfolderBase]: 1099/1910 cut-off events. [2024-06-14 13:53:28,343 INFO L125 PetriNetUnfolderBase]: For 42479/42480 co-relation queries the response was YES. [2024-06-14 13:53:28,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9435 conditions, 1910 events. 1099/1910 cut-off events. For 42479/42480 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10664 event pairs, 345 based on Foata normal form. 9/1911 useless extension candidates. Maximal degree in co-relation 9364. Up to 1615 conditions per place. [2024-06-14 13:53:28,356 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 117 selfloop transitions, 21 changer transitions 0/144 dead transitions. [2024-06-14 13:53:28,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 144 transitions, 1476 flow [2024-06-14 13:53:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 13:53:28,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 13:53:28,357 INFO L175 Difference]: Start difference. First operand has 144 places, 126 transitions, 1142 flow. Second operand 7 states and 150 transitions. [2024-06-14 13:53:28,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 144 transitions, 1476 flow [2024-06-14 13:53:28,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 144 transitions, 1410 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:28,404 INFO L231 Difference]: Finished difference. Result has 146 places, 126 transitions, 1123 flow [2024-06-14 13:53:28,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1123, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2024-06-14 13:53:28,405 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-14 13:53:28,405 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 1123 flow [2024-06-14 13:53:28,405 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) [2024-06-14 13:53:28,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:28,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:28,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:53:28,407 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:28,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:28,408 INFO L85 PathProgramCache]: Analyzing trace with hash 146375564, now seen corresponding path program 4 times [2024-06-14 13:53:28,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:28,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124837823] [2024-06-14 13:53:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:28,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:28,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:28,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124837823] [2024-06-14 13:53:28,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124837823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:28,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:28,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:28,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123978193] [2024-06-14 13:53:28,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:28,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:28,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:28,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:28,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:28,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 1123 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) [2024-06-14 13:53:28,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:28,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:28,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:28,935 INFO L124 PetriNetUnfolderBase]: 1119/1941 cut-off events. [2024-06-14 13:53:28,935 INFO L125 PetriNetUnfolderBase]: For 42703/42704 co-relation queries the response was YES. [2024-06-14 13:53:28,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9512 conditions, 1941 events. 1119/1941 cut-off events. For 42703/42704 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10867 event pairs, 250 based on Foata normal form. 7/1939 useless extension candidates. Maximal degree in co-relation 9440. Up to 1528 conditions per place. [2024-06-14 13:53:28,948 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 118 selfloop transitions, 29 changer transitions 0/153 dead transitions. [2024-06-14 13:53:28,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 153 transitions, 1595 flow [2024-06-14 13:53:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:53:28,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-14 13:53:28,949 INFO L175 Difference]: Start difference. First operand has 146 places, 126 transitions, 1123 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:53:28,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 153 transitions, 1595 flow [2024-06-14 13:53:29,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 153 transitions, 1532 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:29,002 INFO L231 Difference]: Finished difference. Result has 146 places, 127 transitions, 1146 flow [2024-06-14 13:53:29,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1146, PETRI_PLACES=146, PETRI_TRANSITIONS=127} [2024-06-14 13:53:29,003 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-14 13:53:29,003 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 127 transitions, 1146 flow [2024-06-14 13:53:29,003 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) [2024-06-14 13:53:29,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:29,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:29,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:53:29,003 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:29,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1470700796, now seen corresponding path program 5 times [2024-06-14 13:53:29,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:29,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697219060] [2024-06-14 13:53:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:29,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:29,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:29,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697219060] [2024-06-14 13:53:29,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697219060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:29,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:29,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:29,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274789889] [2024-06-14 13:53:29,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:29,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:29,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:29,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:29,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:29,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:29,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 127 transitions, 1146 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) [2024-06-14 13:53:29,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:29,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:29,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:29,464 INFO L124 PetriNetUnfolderBase]: 1126/1954 cut-off events. [2024-06-14 13:53:29,464 INFO L125 PetriNetUnfolderBase]: For 44070/44070 co-relation queries the response was YES. [2024-06-14 13:53:29,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9659 conditions, 1954 events. 1126/1954 cut-off events. For 44070/44070 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10986 event pairs, 200 based on Foata normal form. 6/1951 useless extension candidates. Maximal degree in co-relation 9586. Up to 1200 conditions per place. [2024-06-14 13:53:29,476 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 106 selfloop transitions, 37 changer transitions 0/149 dead transitions. [2024-06-14 13:53:29,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 149 transitions, 1608 flow [2024-06-14 13:53:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 13:53:29,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 13:53:29,476 INFO L175 Difference]: Start difference. First operand has 146 places, 127 transitions, 1146 flow. Second operand 6 states and 136 transitions. [2024-06-14 13:53:29,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 149 transitions, 1608 flow [2024-06-14 13:53:29,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 149 transitions, 1534 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:29,530 INFO L231 Difference]: Finished difference. Result has 147 places, 128 transitions, 1174 flow [2024-06-14 13:53:29,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1174, PETRI_PLACES=147, PETRI_TRANSITIONS=128} [2024-06-14 13:53:29,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-14 13:53:29,531 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 128 transitions, 1174 flow [2024-06-14 13:53:29,531 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) [2024-06-14 13:53:29,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:29,531 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] [2024-06-14 13:53:29,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:53:29,531 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:29,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:29,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1853320994, now seen corresponding path program 6 times [2024-06-14 13:53:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:29,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639957777] [2024-06-14 13:53:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:29,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:29,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639957777] [2024-06-14 13:53:29,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639957777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:29,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:29,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:29,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032181397] [2024-06-14 13:53:29,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:29,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:29,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:29,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:29,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:29,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 128 transitions, 1174 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) [2024-06-14 13:53:29,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:29,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:29,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:30,008 INFO L124 PetriNetUnfolderBase]: 1108/1932 cut-off events. [2024-06-14 13:53:30,008 INFO L125 PetriNetUnfolderBase]: For 41497/41497 co-relation queries the response was YES. [2024-06-14 13:53:30,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9306 conditions, 1932 events. 1108/1932 cut-off events. For 41497/41497 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10860 event pairs, 360 based on Foata normal form. 8/1935 useless extension candidates. Maximal degree in co-relation 9232. Up to 1634 conditions per place. [2024-06-14 13:53:30,023 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 112 selfloop transitions, 23 changer transitions 0/141 dead transitions. [2024-06-14 13:53:30,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 141 transitions, 1490 flow [2024-06-14 13:53:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-14 13:53:30,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-14 13:53:30,024 INFO L175 Difference]: Start difference. First operand has 147 places, 128 transitions, 1174 flow. Second operand 7 states and 146 transitions. [2024-06-14 13:53:30,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 141 transitions, 1490 flow [2024-06-14 13:53:30,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 141 transitions, 1423 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:30,074 INFO L231 Difference]: Finished difference. Result has 151 places, 128 transitions, 1158 flow [2024-06-14 13:53:30,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1158, PETRI_PLACES=151, PETRI_TRANSITIONS=128} [2024-06-14 13:53:30,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-14 13:53:30,074 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 128 transitions, 1158 flow [2024-06-14 13:53:30,075 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) [2024-06-14 13:53:30,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:30,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:30,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:53:30,075 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:30,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1189350846, now seen corresponding path program 2 times [2024-06-14 13:53:30,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:30,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103652714] [2024-06-14 13:53:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:30,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:30,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103652714] [2024-06-14 13:53:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103652714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:30,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712985567] [2024-06-14 13:53:30,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:30,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:30,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:30,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:30,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:30,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 128 transitions, 1158 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) [2024-06-14 13:53:30,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:30,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:30,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:30,577 INFO L124 PetriNetUnfolderBase]: 1128/1964 cut-off events. [2024-06-14 13:53:30,577 INFO L125 PetriNetUnfolderBase]: For 42015/42015 co-relation queries the response was YES. [2024-06-14 13:53:30,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9314 conditions, 1964 events. 1128/1964 cut-off events. For 42015/42015 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11095 event pairs, 356 based on Foata normal form. 6/1965 useless extension candidates. Maximal degree in co-relation 9239. Up to 1618 conditions per place. [2024-06-14 13:53:30,590 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 112 selfloop transitions, 28 changer transitions 0/146 dead transitions. [2024-06-14 13:53:30,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 146 transitions, 1525 flow [2024-06-14 13:53:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 13:53:30,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-14 13:53:30,591 INFO L175 Difference]: Start difference. First operand has 151 places, 128 transitions, 1158 flow. Second operand 8 states and 166 transitions. [2024-06-14 13:53:30,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 146 transitions, 1525 flow [2024-06-14 13:53:30,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 146 transitions, 1466 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:30,643 INFO L231 Difference]: Finished difference. Result has 153 places, 129 transitions, 1187 flow [2024-06-14 13:53:30,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1187, PETRI_PLACES=153, PETRI_TRANSITIONS=129} [2024-06-14 13:53:30,643 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-14 13:53:30,643 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 129 transitions, 1187 flow [2024-06-14 13:53:30,644 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) [2024-06-14 13:53:30,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:30,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:30,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:53:30,644 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:30,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:30,645 INFO L85 PathProgramCache]: Analyzing trace with hash -776043966, now seen corresponding path program 3 times [2024-06-14 13:53:30,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:30,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763091126] [2024-06-14 13:53:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:30,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:30,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763091126] [2024-06-14 13:53:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763091126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:30,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:30,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435915098] [2024-06-14 13:53:30,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:30,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:30,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:30,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:30,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 129 transitions, 1187 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) [2024-06-14 13:53:30,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:30,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:30,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:31,163 INFO L124 PetriNetUnfolderBase]: 1148/2003 cut-off events. [2024-06-14 13:53:31,163 INFO L125 PetriNetUnfolderBase]: For 44870/44870 co-relation queries the response was YES. [2024-06-14 13:53:31,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 2003 events. 1148/2003 cut-off events. For 44870/44870 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11363 event pairs, 268 based on Foata normal form. 6/2004 useless extension candidates. Maximal degree in co-relation 9525. Up to 1582 conditions per place. [2024-06-14 13:53:31,178 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 101 selfloop transitions, 39 changer transitions 0/146 dead transitions. [2024-06-14 13:53:31,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 146 transitions, 1552 flow [2024-06-14 13:53:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 13:53:31,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 13:53:31,179 INFO L175 Difference]: Start difference. First operand has 153 places, 129 transitions, 1187 flow. Second operand 7 states and 152 transitions. [2024-06-14 13:53:31,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 146 transitions, 1552 flow [2024-06-14 13:53:31,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 146 transitions, 1479 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:31,235 INFO L231 Difference]: Finished difference. Result has 154 places, 130 transitions, 1226 flow [2024-06-14 13:53:31,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=154, PETRI_TRANSITIONS=130} [2024-06-14 13:53:31,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-14 13:53:31,235 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 130 transitions, 1226 flow [2024-06-14 13:53:31,235 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) [2024-06-14 13:53:31,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:31,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:31,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:53:31,236 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:31,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash -775806816, now seen corresponding path program 4 times [2024-06-14 13:53:31,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:31,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863681914] [2024-06-14 13:53:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:31,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:31,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:31,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863681914] [2024-06-14 13:53:31,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863681914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:31,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:31,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:31,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276409140] [2024-06-14 13:53:31,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:31,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:31,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:31,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:31,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:31,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:31,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 130 transitions, 1226 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) [2024-06-14 13:53:31,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:31,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:31,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:31,675 INFO L124 PetriNetUnfolderBase]: 1135/1981 cut-off events. [2024-06-14 13:53:31,675 INFO L125 PetriNetUnfolderBase]: For 41061/41061 co-relation queries the response was YES. [2024-06-14 13:53:31,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9243 conditions, 1981 events. 1135/1981 cut-off events. For 41061/41061 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 11220 event pairs, 197 based on Foata normal form. 6/1978 useless extension candidates. Maximal degree in co-relation 9166. Up to 1210 conditions per place. [2024-06-14 13:53:31,689 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 101 selfloop transitions, 43 changer transitions 0/150 dead transitions. [2024-06-14 13:53:31,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 150 transitions, 1590 flow [2024-06-14 13:53:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 13:53:31,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 13:53:31,690 INFO L175 Difference]: Start difference. First operand has 154 places, 130 transitions, 1226 flow. Second operand 6 states and 135 transitions. [2024-06-14 13:53:31,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 150 transitions, 1590 flow [2024-06-14 13:53:31,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 150 transitions, 1487 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:31,799 INFO L231 Difference]: Finished difference. Result has 155 places, 130 transitions, 1213 flow [2024-06-14 13:53:31,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1213, PETRI_PLACES=155, PETRI_TRANSITIONS=130} [2024-06-14 13:53:31,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-14 13:53:31,800 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 130 transitions, 1213 flow [2024-06-14 13:53:31,800 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) [2024-06-14 13:53:31,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:31,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:31,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:53:31,800 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:31,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:31,800 INFO L85 PathProgramCache]: Analyzing trace with hash -81413850, now seen corresponding path program 4 times [2024-06-14 13:53:31,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:31,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84108962] [2024-06-14 13:53:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:31,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:32,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:32,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84108962] [2024-06-14 13:53:32,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84108962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:32,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:32,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49661230] [2024-06-14 13:53:32,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:32,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:32,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:32,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:32,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:32,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 130 transitions, 1213 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) [2024-06-14 13:53:32,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:32,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:32,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:32,326 INFO L124 PetriNetUnfolderBase]: 1155/2010 cut-off events. [2024-06-14 13:53:32,326 INFO L125 PetriNetUnfolderBase]: For 42592/42592 co-relation queries the response was YES. [2024-06-14 13:53:32,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9493 conditions, 2010 events. 1155/2010 cut-off events. For 42592/42592 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11411 event pairs, 366 based on Foata normal form. 6/2011 useless extension candidates. Maximal degree in co-relation 9415. Up to 1699 conditions per place. [2024-06-14 13:53:32,340 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 28 changer transitions 0/146 dead transitions. [2024-06-14 13:53:32,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 146 transitions, 1565 flow [2024-06-14 13:53:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 13:53:32,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-14 13:53:32,341 INFO L175 Difference]: Start difference. First operand has 155 places, 130 transitions, 1213 flow. Second operand 8 states and 164 transitions. [2024-06-14 13:53:32,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 146 transitions, 1565 flow [2024-06-14 13:53:32,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 146 transitions, 1378 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:32,414 INFO L231 Difference]: Finished difference. Result has 155 places, 131 transitions, 1118 flow [2024-06-14 13:53:32,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1118, PETRI_PLACES=155, PETRI_TRANSITIONS=131} [2024-06-14 13:53:32,414 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-14 13:53:32,414 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 131 transitions, 1118 flow [2024-06-14 13:53:32,414 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) [2024-06-14 13:53:32,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:32,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:32,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:53:32,415 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:32,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1817276100, now seen corresponding path program 5 times [2024-06-14 13:53:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:32,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236598627] [2024-06-14 13:53:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:32,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:32,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:32,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236598627] [2024-06-14 13:53:32,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236598627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:32,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:32,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:32,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319213200] [2024-06-14 13:53:32,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:32,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:32,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:32,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:32,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:32,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 131 transitions, 1118 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) [2024-06-14 13:53:32,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:32,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:32,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:32,988 INFO L124 PetriNetUnfolderBase]: 1216/2111 cut-off events. [2024-06-14 13:53:32,988 INFO L125 PetriNetUnfolderBase]: For 53664/53664 co-relation queries the response was YES. [2024-06-14 13:53:32,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9956 conditions, 2111 events. 1216/2111 cut-off events. For 53664/53664 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12089 event pairs, 391 based on Foata normal form. 8/2114 useless extension candidates. Maximal degree in co-relation 9880. Up to 1647 conditions per place. [2024-06-14 13:53:33,002 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 50 changer transitions 0/157 dead transitions. [2024-06-14 13:53:33,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 157 transitions, 1656 flow [2024-06-14 13:53:33,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 13:53:33,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-06-14 13:53:33,003 INFO L175 Difference]: Start difference. First operand has 155 places, 131 transitions, 1118 flow. Second operand 10 states and 207 transitions. [2024-06-14 13:53:33,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 157 transitions, 1656 flow [2024-06-14 13:53:33,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 1556 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:33,068 INFO L231 Difference]: Finished difference. Result has 158 places, 133 transitions, 1188 flow [2024-06-14 13:53:33,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1188, PETRI_PLACES=158, PETRI_TRANSITIONS=133} [2024-06-14 13:53:33,069 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-14 13:53:33,069 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 133 transitions, 1188 flow [2024-06-14 13:53:33,069 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) [2024-06-14 13:53:33,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:33,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:53:33,069 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:33,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2133605146, now seen corresponding path program 6 times [2024-06-14 13:53:33,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:33,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280944661] [2024-06-14 13:53:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:33,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:33,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280944661] [2024-06-14 13:53:33,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280944661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:33,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:33,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:33,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636022546] [2024-06-14 13:53:33,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:33,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:33,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:33,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:33,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:33,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 133 transitions, 1188 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) [2024-06-14 13:53:33,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:33,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:33,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:33,577 INFO L124 PetriNetUnfolderBase]: 1236/2145 cut-off events. [2024-06-14 13:53:33,577 INFO L125 PetriNetUnfolderBase]: For 55051/55051 co-relation queries the response was YES. [2024-06-14 13:53:33,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10178 conditions, 2145 events. 1236/2145 cut-off events. For 55051/55051 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12426 event pairs, 379 based on Foata normal form. 6/2146 useless extension candidates. Maximal degree in co-relation 10102. Up to 1555 conditions per place. [2024-06-14 13:53:33,591 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 57 changer transitions 0/161 dead transitions. [2024-06-14 13:53:33,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 161 transitions, 1712 flow [2024-06-14 13:53:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-14 13:53:33,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-06-14 13:53:33,592 INFO L175 Difference]: Start difference. First operand has 158 places, 133 transitions, 1188 flow. Second operand 11 states and 226 transitions. [2024-06-14 13:53:33,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 161 transitions, 1712 flow [2024-06-14 13:53:33,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 161 transitions, 1587 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:33,664 INFO L231 Difference]: Finished difference. Result has 161 places, 134 transitions, 1217 flow [2024-06-14 13:53:33,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1217, PETRI_PLACES=161, PETRI_TRANSITIONS=134} [2024-06-14 13:53:33,665 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-14 13:53:33,665 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 134 transitions, 1217 flow [2024-06-14 13:53:33,665 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) [2024-06-14 13:53:33,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:33,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:33,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:53:33,666 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:33,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:33,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1809657540, now seen corresponding path program 7 times [2024-06-14 13:53:33,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:33,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500892634] [2024-06-14 13:53:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:33,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:33,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:33,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500892634] [2024-06-14 13:53:33,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500892634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:33,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:33,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:33,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580555628] [2024-06-14 13:53:33,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:33,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:33,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:33,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:33,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:33,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:33,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 134 transitions, 1217 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) [2024-06-14 13:53:33,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:33,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:33,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:34,207 INFO L124 PetriNetUnfolderBase]: 1218/2121 cut-off events. [2024-06-14 13:53:34,207 INFO L125 PetriNetUnfolderBase]: For 48476/48476 co-relation queries the response was YES. [2024-06-14 13:53:34,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9523 conditions, 2121 events. 1218/2121 cut-off events. For 48476/48476 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12296 event pairs, 405 based on Foata normal form. 8/2124 useless extension candidates. Maximal degree in co-relation 9447. Up to 1779 conditions per place. [2024-06-14 13:53:34,221 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 99 selfloop transitions, 48 changer transitions 0/153 dead transitions. [2024-06-14 13:53:34,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 153 transitions, 1571 flow [2024-06-14 13:53:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 13:53:34,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-06-14 13:53:34,222 INFO L175 Difference]: Start difference. First operand has 161 places, 134 transitions, 1217 flow. Second operand 10 states and 203 transitions. [2024-06-14 13:53:34,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 153 transitions, 1571 flow [2024-06-14 13:53:34,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 153 transitions, 1411 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:34,309 INFO L231 Difference]: Finished difference. Result has 162 places, 134 transitions, 1158 flow [2024-06-14 13:53:34,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1158, PETRI_PLACES=162, PETRI_TRANSITIONS=134} [2024-06-14 13:53:34,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-14 13:53:34,309 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 134 transitions, 1158 flow [2024-06-14 13:53:34,309 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) [2024-06-14 13:53:34,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:34,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:34,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:53:34,310 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:34,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash -82564728, now seen corresponding path program 8 times [2024-06-14 13:53:34,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:34,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475919735] [2024-06-14 13:53:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:34,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:34,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475919735] [2024-06-14 13:53:34,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475919735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:34,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:34,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:34,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339179907] [2024-06-14 13:53:34,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:34,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:34,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:34,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:34,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 134 transitions, 1158 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) [2024-06-14 13:53:34,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:34,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:34,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:34,850 INFO L124 PetriNetUnfolderBase]: 1246/2165 cut-off events. [2024-06-14 13:53:34,850 INFO L125 PetriNetUnfolderBase]: For 46374/46374 co-relation queries the response was YES. [2024-06-14 13:53:34,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9458 conditions, 2165 events. 1246/2165 cut-off events. For 46374/46374 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 12537 event pairs, 299 based on Foata normal form. 6/2166 useless extension candidates. Maximal degree in co-relation 9381. Up to 1740 conditions per place. [2024-06-14 13:53:34,865 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 107 selfloop transitions, 42 changer transitions 0/155 dead transitions. [2024-06-14 13:53:34,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 155 transitions, 1564 flow [2024-06-14 13:53:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 13:53:34,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-06-14 13:53:34,866 INFO L175 Difference]: Start difference. First operand has 162 places, 134 transitions, 1158 flow. Second operand 8 states and 169 transitions. [2024-06-14 13:53:34,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 155 transitions, 1564 flow [2024-06-14 13:53:34,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 155 transitions, 1462 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:34,985 INFO L231 Difference]: Finished difference. Result has 161 places, 137 transitions, 1192 flow [2024-06-14 13:53:34,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1192, PETRI_PLACES=161, PETRI_TRANSITIONS=137} [2024-06-14 13:53:34,985 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-14 13:53:34,985 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 137 transitions, 1192 flow [2024-06-14 13:53:34,985 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) [2024-06-14 13:53:34,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:34,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:34,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:53:34,986 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:34,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:34,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1418402170, now seen corresponding path program 9 times [2024-06-14 13:53:34,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:34,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240286574] [2024-06-14 13:53:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:34,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:35,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:35,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240286574] [2024-06-14 13:53:35,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240286574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:35,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:35,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810555440] [2024-06-14 13:53:35,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:35,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:35,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:35,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:35,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:35,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:35,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 137 transitions, 1192 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) [2024-06-14 13:53:35,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:35,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:35,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:35,567 INFO L124 PetriNetUnfolderBase]: 1393/2398 cut-off events. [2024-06-14 13:53:35,567 INFO L125 PetriNetUnfolderBase]: For 79691/79691 co-relation queries the response was YES. [2024-06-14 13:53:35,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11725 conditions, 2398 events. 1393/2398 cut-off events. For 79691/79691 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14105 event pairs, 408 based on Foata normal form. 6/2399 useless extension candidates. Maximal degree in co-relation 11647. Up to 1246 conditions per place. [2024-06-14 13:53:35,584 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 73 changer transitions 0/167 dead transitions. [2024-06-14 13:53:35,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 167 transitions, 1838 flow [2024-06-14 13:53:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 13:53:35,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325 [2024-06-14 13:53:35,585 INFO L175 Difference]: Start difference. First operand has 161 places, 137 transitions, 1192 flow. Second operand 10 states and 213 transitions. [2024-06-14 13:53:35,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 167 transitions, 1838 flow [2024-06-14 13:53:35,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 167 transitions, 1726 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:35,705 INFO L231 Difference]: Finished difference. Result has 166 places, 138 transitions, 1264 flow [2024-06-14 13:53:35,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1264, PETRI_PLACES=166, PETRI_TRANSITIONS=138} [2024-06-14 13:53:35,706 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-14 13:53:35,706 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 138 transitions, 1264 flow [2024-06-14 13:53:35,706 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) [2024-06-14 13:53:35,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:35,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:35,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:53:35,707 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:35,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:35,707 INFO L85 PathProgramCache]: Analyzing trace with hash 94566792, now seen corresponding path program 10 times [2024-06-14 13:53:35,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:35,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809655187] [2024-06-14 13:53:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:35,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:35,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:35,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809655187] [2024-06-14 13:53:35,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809655187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:35,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:35,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:35,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195579066] [2024-06-14 13:53:35,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:35,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:35,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:35,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:36,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:36,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 138 transitions, 1264 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) [2024-06-14 13:53:36,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:36,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:36,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:36,350 INFO L124 PetriNetUnfolderBase]: 1380/2387 cut-off events. [2024-06-14 13:53:36,350 INFO L125 PetriNetUnfolderBase]: For 74792/74792 co-relation queries the response was YES. [2024-06-14 13:53:36,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11388 conditions, 2387 events. 1380/2387 cut-off events. For 74792/74792 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14068 event pairs, 370 based on Foata normal form. 6/2388 useless extension candidates. Maximal degree in co-relation 11309. Up to 1886 conditions per place. [2024-06-14 13:53:36,367 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 46 changer transitions 0/160 dead transitions. [2024-06-14 13:53:36,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 160 transitions, 1650 flow [2024-06-14 13:53:36,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 13:53:36,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194444444444445 [2024-06-14 13:53:36,368 INFO L175 Difference]: Start difference. First operand has 166 places, 138 transitions, 1264 flow. Second operand 9 states and 187 transitions. [2024-06-14 13:53:36,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 160 transitions, 1650 flow [2024-06-14 13:53:36,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 160 transitions, 1426 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:36,550 INFO L231 Difference]: Finished difference. Result has 167 places, 138 transitions, 1136 flow [2024-06-14 13:53:36,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1136, PETRI_PLACES=167, PETRI_TRANSITIONS=138} [2024-06-14 13:53:36,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-14 13:53:36,550 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 138 transitions, 1136 flow [2024-06-14 13:53:36,551 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) [2024-06-14 13:53:36,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:36,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:36,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:53:36,551 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:36,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:36,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1417345264, now seen corresponding path program 1 times [2024-06-14 13:53:36,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:36,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025533410] [2024-06-14 13:53:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:36,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:36,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:36,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025533410] [2024-06-14 13:53:36,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025533410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:36,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:36,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:36,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108353065] [2024-06-14 13:53:36,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:36,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:36,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:36,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:36,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:36,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:36,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 138 transitions, 1136 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:36,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:36,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:36,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:37,212 INFO L124 PetriNetUnfolderBase]: 1455/2562 cut-off events. [2024-06-14 13:53:37,212 INFO L125 PetriNetUnfolderBase]: For 85928/85929 co-relation queries the response was YES. [2024-06-14 13:53:37,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11225 conditions, 2562 events. 1455/2562 cut-off events. For 85928/85929 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15657 event pairs, 255 based on Foata normal form. 19/2577 useless extension candidates. Maximal degree in co-relation 11146. Up to 1667 conditions per place. [2024-06-14 13:53:37,231 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 135 selfloop transitions, 22 changer transitions 11/174 dead transitions. [2024-06-14 13:53:37,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 174 transitions, 1719 flow [2024-06-14 13:53:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:53:37,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 13:53:37,232 INFO L175 Difference]: Start difference. First operand has 167 places, 138 transitions, 1136 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:53:37,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 174 transitions, 1719 flow [2024-06-14 13:53:37,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 174 transitions, 1606 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:37,361 INFO L231 Difference]: Finished difference. Result has 166 places, 138 transitions, 1086 flow [2024-06-14 13:53:37,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1086, PETRI_PLACES=166, PETRI_TRANSITIONS=138} [2024-06-14 13:53:37,361 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-14 13:53:37,361 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 138 transitions, 1086 flow [2024-06-14 13:53:37,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:37,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:37,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:37,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:53:37,362 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:37,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:37,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1417643794, now seen corresponding path program 2 times [2024-06-14 13:53:37,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:37,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056245312] [2024-06-14 13:53:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:37,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:37,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:37,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056245312] [2024-06-14 13:53:37,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056245312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:37,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:37,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:37,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853359712] [2024-06-14 13:53:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:37,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:37,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:37,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:37,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:37,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 138 transitions, 1086 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:37,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:37,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:37,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:37,975 INFO L124 PetriNetUnfolderBase]: 1371/2404 cut-off events. [2024-06-14 13:53:37,975 INFO L125 PetriNetUnfolderBase]: For 81998/81999 co-relation queries the response was YES. [2024-06-14 13:53:37,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10439 conditions, 2404 events. 1371/2404 cut-off events. For 81998/81999 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14477 event pairs, 306 based on Foata normal form. 19/2419 useless extension candidates. Maximal degree in co-relation 10359. Up to 1667 conditions per place. [2024-06-14 13:53:37,994 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 133 selfloop transitions, 18 changer transitions 10/167 dead transitions. [2024-06-14 13:53:37,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 167 transitions, 1614 flow [2024-06-14 13:53:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 13:53:37,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-14 13:53:37,995 INFO L175 Difference]: Start difference. First operand has 166 places, 138 transitions, 1086 flow. Second operand 7 states and 158 transitions. [2024-06-14 13:53:37,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 167 transitions, 1614 flow [2024-06-14 13:53:38,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 167 transitions, 1574 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:38,134 INFO L231 Difference]: Finished difference. Result has 165 places, 134 transitions, 1050 flow [2024-06-14 13:53:38,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1050, PETRI_PLACES=165, PETRI_TRANSITIONS=134} [2024-06-14 13:53:38,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-14 13:53:38,134 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 134 transitions, 1050 flow [2024-06-14 13:53:38,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:38,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:38,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:53:38,135 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:38,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:38,135 INFO L85 PathProgramCache]: Analyzing trace with hash 790980898, now seen corresponding path program 1 times [2024-06-14 13:53:38,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:38,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794738023] [2024-06-14 13:53:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:38,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:38,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:38,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794738023] [2024-06-14 13:53:38,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794738023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:38,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:38,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:38,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511702744] [2024-06-14 13:53:38,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:38,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:38,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:38,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:38,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:38,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 134 transitions, 1050 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:38,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:38,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:38,761 INFO L124 PetriNetUnfolderBase]: 1335/2336 cut-off events. [2024-06-14 13:53:38,761 INFO L125 PetriNetUnfolderBase]: For 78794/78795 co-relation queries the response was YES. [2024-06-14 13:53:38,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10118 conditions, 2336 events. 1335/2336 cut-off events. For 78794/78795 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13916 event pairs, 237 based on Foata normal form. 19/2351 useless extension candidates. Maximal degree in co-relation 10039. Up to 1667 conditions per place. [2024-06-14 13:53:38,777 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 19 changer transitions 7/164 dead transitions. [2024-06-14 13:53:38,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 164 transitions, 1580 flow [2024-06-14 13:53:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:53:38,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-14 13:53:38,778 INFO L175 Difference]: Start difference. First operand has 165 places, 134 transitions, 1050 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:53:38,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 164 transitions, 1580 flow [2024-06-14 13:53:38,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 164 transitions, 1533 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:38,865 INFO L231 Difference]: Finished difference. Result has 161 places, 133 transitions, 1039 flow [2024-06-14 13:53:38,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1039, PETRI_PLACES=161, PETRI_TRANSITIONS=133} [2024-06-14 13:53:38,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-14 13:53:38,866 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 133 transitions, 1039 flow [2024-06-14 13:53:38,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:38,866 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, 1, 1] [2024-06-14 13:53:38,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:53:38,866 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:38,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:38,866 INFO L85 PathProgramCache]: Analyzing trace with hash 790986478, now seen corresponding path program 2 times [2024-06-14 13:53:38,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:38,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134653176] [2024-06-14 13:53:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:39,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:39,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134653176] [2024-06-14 13:53:39,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134653176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:39,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:39,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:39,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579144643] [2024-06-14 13:53:39,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:39,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:39,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 133 transitions, 1039 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:39,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:39,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:39,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:39,432 INFO L124 PetriNetUnfolderBase]: 1242/2177 cut-off events. [2024-06-14 13:53:39,432 INFO L125 PetriNetUnfolderBase]: For 56825/56826 co-relation queries the response was YES. [2024-06-14 13:53:39,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8735 conditions, 2177 events. 1242/2177 cut-off events. For 56825/56826 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 12852 event pairs, 225 based on Foata normal form. 19/2192 useless extension candidates. Maximal degree in co-relation 8658. Up to 1667 conditions per place. [2024-06-14 13:53:39,446 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 129 selfloop transitions, 17 changer transitions 9/161 dead transitions. [2024-06-14 13:53:39,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 161 transitions, 1453 flow [2024-06-14 13:53:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:53:39,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-14 13:53:39,447 INFO L175 Difference]: Start difference. First operand has 161 places, 133 transitions, 1039 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:53:39,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 161 transitions, 1453 flow [2024-06-14 13:53:39,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 161 transitions, 1413 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:39,549 INFO L231 Difference]: Finished difference. Result has 161 places, 130 transitions, 1007 flow [2024-06-14 13:53:39,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1007, PETRI_PLACES=161, PETRI_TRANSITIONS=130} [2024-06-14 13:53:39,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-14 13:53:39,549 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 130 transitions, 1007 flow [2024-06-14 13:53:39,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:39,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:39,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:39,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:53:39,550 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:39,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:39,550 INFO L85 PathProgramCache]: Analyzing trace with hash 819070702, now seen corresponding path program 3 times [2024-06-14 13:53:39,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:39,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024955876] [2024-06-14 13:53:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:39,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:39,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:39,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024955876] [2024-06-14 13:53:39,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024955876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:39,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:39,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:39,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766096376] [2024-06-14 13:53:39,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:39,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:39,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:39,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:39,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:39,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:39,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 130 transitions, 1007 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:39,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:39,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:39,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:40,121 INFO L124 PetriNetUnfolderBase]: 1297/2280 cut-off events. [2024-06-14 13:53:40,122 INFO L125 PetriNetUnfolderBase]: For 78955/78956 co-relation queries the response was YES. [2024-06-14 13:53:40,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9867 conditions, 2280 events. 1297/2280 cut-off events. For 78955/78956 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13637 event pairs, 239 based on Foata normal form. 19/2296 useless extension candidates. Maximal degree in co-relation 9790. Up to 1603 conditions per place. [2024-06-14 13:53:40,137 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 135 selfloop transitions, 21 changer transitions 8/170 dead transitions. [2024-06-14 13:53:40,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 170 transitions, 1585 flow [2024-06-14 13:53:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 13:53:40,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-14 13:53:40,138 INFO L175 Difference]: Start difference. First operand has 161 places, 130 transitions, 1007 flow. Second operand 10 states and 211 transitions. [2024-06-14 13:53:40,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 170 transitions, 1585 flow [2024-06-14 13:53:40,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 170 transitions, 1531 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:40,224 INFO L231 Difference]: Finished difference. Result has 163 places, 128 transitions, 983 flow [2024-06-14 13:53:40,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=983, PETRI_PLACES=163, PETRI_TRANSITIONS=128} [2024-06-14 13:53:40,225 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-14 13:53:40,225 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 128 transitions, 983 flow [2024-06-14 13:53:40,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:40,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:40,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:53:40,225 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:40,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:40,225 INFO L85 PathProgramCache]: Analyzing trace with hash 819065122, now seen corresponding path program 4 times [2024-06-14 13:53:40,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:40,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023375324] [2024-06-14 13:53:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:40,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023375324] [2024-06-14 13:53:40,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023375324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:40,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:40,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:40,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107562680] [2024-06-14 13:53:40,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:40,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:40,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:40,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:40,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 128 transitions, 983 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:40,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:40,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:40,759 INFO L124 PetriNetUnfolderBase]: 1192/2093 cut-off events. [2024-06-14 13:53:40,759 INFO L125 PetriNetUnfolderBase]: For 56826/56827 co-relation queries the response was YES. [2024-06-14 13:53:40,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8425 conditions, 2093 events. 1192/2093 cut-off events. For 56826/56827 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12300 event pairs, 227 based on Foata normal form. 19/2109 useless extension candidates. Maximal degree in co-relation 8348. Up to 1603 conditions per place. [2024-06-14 13:53:40,773 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 123 selfloop transitions, 18 changer transitions 12/159 dead transitions. [2024-06-14 13:53:40,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 159 transitions, 1407 flow [2024-06-14 13:53:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:53:40,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-14 13:53:40,774 INFO L175 Difference]: Start difference. First operand has 163 places, 128 transitions, 983 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:53:40,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 159 transitions, 1407 flow [2024-06-14 13:53:40,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 159 transitions, 1342 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 13:53:40,879 INFO L231 Difference]: Finished difference. Result has 159 places, 126 transitions, 943 flow [2024-06-14 13:53:40,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=159, PETRI_TRANSITIONS=126} [2024-06-14 13:53:40,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-14 13:53:40,879 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 126 transitions, 943 flow [2024-06-14 13:53:40,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:40,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:40,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:53:40,880 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:40,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash 815346052, now seen corresponding path program 5 times [2024-06-14 13:53:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:40,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394739476] [2024-06-14 13:53:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:41,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:41,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394739476] [2024-06-14 13:53:41,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394739476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:41,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:41,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:41,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006342903] [2024-06-14 13:53:41,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:41,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:41,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:41,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:41,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:41,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 126 transitions, 943 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) [2024-06-14 13:53:41,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:41,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:41,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:41,457 INFO L124 PetriNetUnfolderBase]: 1168/2041 cut-off events. [2024-06-14 13:53:41,457 INFO L125 PetriNetUnfolderBase]: For 56690/56691 co-relation queries the response was YES. [2024-06-14 13:53:41,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8165 conditions, 2041 events. 1168/2041 cut-off events. For 56690/56691 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11833 event pairs, 246 based on Foata normal form. 19/2057 useless extension candidates. Maximal degree in co-relation 8090. Up to 1511 conditions per place. [2024-06-14 13:53:41,471 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 117 selfloop transitions, 14 changer transitions 20/157 dead transitions. [2024-06-14 13:53:41,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 157 transitions, 1363 flow [2024-06-14 13:53:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:53:41,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 13:53:41,472 INFO L175 Difference]: Start difference. First operand has 159 places, 126 transitions, 943 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:53:41,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 157 transitions, 1363 flow [2024-06-14 13:53:41,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 157 transitions, 1323 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:41,580 INFO L231 Difference]: Finished difference. Result has 156 places, 120 transitions, 885 flow [2024-06-14 13:53:41,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=885, PETRI_PLACES=156, PETRI_TRANSITIONS=120} [2024-06-14 13:53:41,580 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-14 13:53:41,581 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 120 transitions, 885 flow [2024-06-14 13:53:41,581 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) [2024-06-14 13:53:41,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:41,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:41,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:53:41,581 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:41,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:41,581 INFO L85 PathProgramCache]: Analyzing trace with hash 355475632, now seen corresponding path program 3 times [2024-06-14 13:53:41,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050679339] [2024-06-14 13:53:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:41,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:41,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:41,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050679339] [2024-06-14 13:53:41,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050679339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:41,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:41,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:41,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110474384] [2024-06-14 13:53:41,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:41,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:41,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:41,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:41,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 120 transitions, 885 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) [2024-06-14 13:53:41,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:41,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:41,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:42,272 INFO L124 PetriNetUnfolderBase]: 1327/2314 cut-off events. [2024-06-14 13:53:42,273 INFO L125 PetriNetUnfolderBase]: For 112128/112129 co-relation queries the response was YES. [2024-06-14 13:53:42,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11370 conditions, 2314 events. 1327/2314 cut-off events. For 112128/112129 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13903 event pairs, 430 based on Foata normal form. 19/2329 useless extension candidates. Maximal degree in co-relation 11296. Up to 1268 conditions per place. [2024-06-14 13:53:42,287 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 113 selfloop transitions, 38 changer transitions 11/168 dead transitions. [2024-06-14 13:53:42,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 168 transitions, 1573 flow [2024-06-14 13:53:42,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:53:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:53:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-14 13:53:42,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 13:53:42,288 INFO L175 Difference]: Start difference. First operand has 156 places, 120 transitions, 885 flow. Second operand 13 states and 273 transitions. [2024-06-14 13:53:42,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 168 transitions, 1573 flow [2024-06-14 13:53:42,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 168 transitions, 1477 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-14 13:53:42,434 INFO L231 Difference]: Finished difference. Result has 151 places, 118 transitions, 866 flow [2024-06-14 13:53:42,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=866, PETRI_PLACES=151, PETRI_TRANSITIONS=118} [2024-06-14 13:53:42,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-14 13:53:42,435 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 118 transitions, 866 flow [2024-06-14 13:53:42,435 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) [2024-06-14 13:53:42,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:42,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:42,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:53:42,435 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:42,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash 355774162, now seen corresponding path program 4 times [2024-06-14 13:53:42,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:42,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721577796] [2024-06-14 13:53:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:42,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:42,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721577796] [2024-06-14 13:53:42,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721577796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:42,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:42,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:42,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908108195] [2024-06-14 13:53:42,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:42,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:42,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:42,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:42,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:42,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:42,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 118 transitions, 866 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) [2024-06-14 13:53:42,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:42,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:42,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:43,078 INFO L124 PetriNetUnfolderBase]: 1390/2403 cut-off events. [2024-06-14 13:53:43,078 INFO L125 PetriNetUnfolderBase]: For 129301/129302 co-relation queries the response was YES. [2024-06-14 13:53:43,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12598 conditions, 2403 events. 1390/2403 cut-off events. For 129301/129302 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14525 event pairs, 500 based on Foata normal form. 19/2418 useless extension candidates. Maximal degree in co-relation 12529. Up to 1268 conditions per place. [2024-06-14 13:53:43,093 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 112 selfloop transitions, 36 changer transitions 9/163 dead transitions. [2024-06-14 13:53:43,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 163 transitions, 1528 flow [2024-06-14 13:53:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:53:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:53:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-14 13:53:43,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-14 13:53:43,094 INFO L175 Difference]: Start difference. First operand has 151 places, 118 transitions, 866 flow. Second operand 13 states and 270 transitions. [2024-06-14 13:53:43,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 163 transitions, 1528 flow [2024-06-14 13:53:43,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 163 transitions, 1442 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 13:53:43,179 INFO L231 Difference]: Finished difference. Result has 150 places, 115 transitions, 841 flow [2024-06-14 13:53:43,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=841, PETRI_PLACES=150, PETRI_TRANSITIONS=115} [2024-06-14 13:53:43,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-14 13:53:43,180 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 115 transitions, 841 flow [2024-06-14 13:53:43,180 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) [2024-06-14 13:53:43,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:43,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:43,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:53:43,180 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:43,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash 348325792, now seen corresponding path program 5 times [2024-06-14 13:53:43,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:43,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433619895] [2024-06-14 13:53:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:43,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:43,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:43,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433619895] [2024-06-14 13:53:43,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433619895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:43,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:43,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:43,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293814082] [2024-06-14 13:53:43,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:43,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:43,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:43,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 115 transitions, 841 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) [2024-06-14 13:53:43,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:43,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:43,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:43,822 INFO L124 PetriNetUnfolderBase]: 1264/2185 cut-off events. [2024-06-14 13:53:43,822 INFO L125 PetriNetUnfolderBase]: For 105124/105125 co-relation queries the response was YES. [2024-06-14 13:53:43,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10737 conditions, 2185 events. 1264/2185 cut-off events. For 105124/105125 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12885 event pairs, 484 based on Foata normal form. 25/2206 useless extension candidates. Maximal degree in co-relation 10669. Up to 1502 conditions per place. [2024-06-14 13:53:43,837 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 33 changer transitions 13/153 dead transitions. [2024-06-14 13:53:43,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 153 transitions, 1359 flow [2024-06-14 13:53:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:53:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:53:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-14 13:53:43,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-06-14 13:53:43,838 INFO L175 Difference]: Start difference. First operand has 150 places, 115 transitions, 841 flow. Second operand 12 states and 247 transitions. [2024-06-14 13:53:43,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 153 transitions, 1359 flow [2024-06-14 13:53:43,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 153 transitions, 1276 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-14 13:53:43,915 INFO L231 Difference]: Finished difference. Result has 146 places, 112 transitions, 805 flow [2024-06-14 13:53:43,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=805, PETRI_PLACES=146, PETRI_TRANSITIONS=112} [2024-06-14 13:53:43,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-14 13:53:43,916 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 112 transitions, 805 flow [2024-06-14 13:53:43,916 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) [2024-06-14 13:53:43,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:43,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:43,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:53:43,916 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:43,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash 157243342, now seen corresponding path program 6 times [2024-06-14 13:53:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:43,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113694365] [2024-06-14 13:53:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:44,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:44,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113694365] [2024-06-14 13:53:44,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113694365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:44,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:44,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:44,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339075959] [2024-06-14 13:53:44,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:44,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:44,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:44,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:44,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 112 transitions, 805 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) [2024-06-14 13:53:44,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:44,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:44,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:44,563 INFO L124 PetriNetUnfolderBase]: 1204/2073 cut-off events. [2024-06-14 13:53:44,563 INFO L125 PetriNetUnfolderBase]: For 98479/98480 co-relation queries the response was YES. [2024-06-14 13:53:44,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10187 conditions, 2073 events. 1204/2073 cut-off events. For 98479/98480 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 12061 event pairs, 510 based on Foata normal form. 27/2096 useless extension candidates. Maximal degree in co-relation 10121. Up to 1713 conditions per place. [2024-06-14 13:53:44,578 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 28 changer transitions 17/140 dead transitions. [2024-06-14 13:53:44,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 140 transitions, 1161 flow [2024-06-14 13:53:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:53:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:53:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-14 13:53:44,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-14 13:53:44,579 INFO L175 Difference]: Start difference. First operand has 146 places, 112 transitions, 805 flow. Second operand 12 states and 237 transitions. [2024-06-14 13:53:44,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 140 transitions, 1161 flow [2024-06-14 13:53:44,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 140 transitions, 1097 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 13:53:44,651 INFO L231 Difference]: Finished difference. Result has 144 places, 107 transitions, 764 flow [2024-06-14 13:53:44,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=764, PETRI_PLACES=144, PETRI_TRANSITIONS=107} [2024-06-14 13:53:44,651 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-14 13:53:44,651 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 107 transitions, 764 flow [2024-06-14 13:53:44,651 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) [2024-06-14 13:53:44,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:44,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:44,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:53:44,651 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:44,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2041494910, now seen corresponding path program 7 times [2024-06-14 13:53:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:44,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698349797] [2024-06-14 13:53:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:44,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:44,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:44,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698349797] [2024-06-14 13:53:44,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698349797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:44,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:44,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:44,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178142481] [2024-06-14 13:53:44,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:44,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:44,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:44,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:44,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 107 transitions, 764 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) [2024-06-14 13:53:44,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:44,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:44,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:45,236 INFO L124 PetriNetUnfolderBase]: 1066/1843 cut-off events. [2024-06-14 13:53:45,237 INFO L125 PetriNetUnfolderBase]: For 70272/70273 co-relation queries the response was YES. [2024-06-14 13:53:45,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8229 conditions, 1843 events. 1066/1843 cut-off events. For 70272/70273 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10437 event pairs, 433 based on Foata normal form. 27/1866 useless extension candidates. Maximal degree in co-relation 8164. Up to 1502 conditions per place. [2024-06-14 13:53:45,249 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 24 changer transitions 12/130 dead transitions. [2024-06-14 13:53:45,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 130 transitions, 1088 flow [2024-06-14 13:53:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:45,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-14 13:53:45,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025 [2024-06-14 13:53:45,250 INFO L175 Difference]: Start difference. First operand has 144 places, 107 transitions, 764 flow. Second operand 10 states and 201 transitions. [2024-06-14 13:53:45,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 130 transitions, 1088 flow [2024-06-14 13:53:45,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 130 transitions, 1026 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 13:53:45,306 INFO L231 Difference]: Finished difference. Result has 138 places, 103 transitions, 724 flow [2024-06-14 13:53:45,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=724, PETRI_PLACES=138, PETRI_TRANSITIONS=103} [2024-06-14 13:53:45,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-14 13:53:45,306 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 103 transitions, 724 flow [2024-06-14 13:53:45,307 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) [2024-06-14 13:53:45,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:45,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:45,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:53:45,307 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:45,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1081590864, now seen corresponding path program 8 times [2024-06-14 13:53:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:45,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270368826] [2024-06-14 13:53:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:45,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270368826] [2024-06-14 13:53:45,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270368826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:45,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:45,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:45,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847456800] [2024-06-14 13:53:45,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:45,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:45,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:45,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:45,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:45,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 103 transitions, 724 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) [2024-06-14 13:53:45,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:45,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:45,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:45,862 INFO L124 PetriNetUnfolderBase]: 937/1634 cut-off events. [2024-06-14 13:53:45,863 INFO L125 PetriNetUnfolderBase]: For 42450/42451 co-relation queries the response was YES. [2024-06-14 13:53:45,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6441 conditions, 1634 events. 937/1634 cut-off events. For 42450/42451 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9053 event pairs, 309 based on Foata normal form. 25/1655 useless extension candidates. Maximal degree in co-relation 6378. Up to 1268 conditions per place. [2024-06-14 13:53:45,871 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 82 selfloop transitions, 20 changer transitions 22/130 dead transitions. [2024-06-14 13:53:45,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 130 transitions, 1072 flow [2024-06-14 13:53:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-14 13:53:45,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-06-14 13:53:45,872 INFO L175 Difference]: Start difference. First operand has 138 places, 103 transitions, 724 flow. Second operand 10 states and 202 transitions. [2024-06-14 13:53:45,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 130 transitions, 1072 flow [2024-06-14 13:53:45,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 130 transitions, 1020 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:45,917 INFO L231 Difference]: Finished difference. Result has 135 places, 98 transitions, 675 flow [2024-06-14 13:53:45,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=675, PETRI_PLACES=135, PETRI_TRANSITIONS=98} [2024-06-14 13:53:45,918 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-14 13:53:45,918 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 98 transitions, 675 flow [2024-06-14 13:53:45,918 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) [2024-06-14 13:53:45,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:45,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:45,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:53:45,918 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:45,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:45,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2007476048, now seen corresponding path program 9 times [2024-06-14 13:53:45,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:45,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306276474] [2024-06-14 13:53:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:45,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:46,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:46,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306276474] [2024-06-14 13:53:46,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306276474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:46,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:46,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:46,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462206429] [2024-06-14 13:53:46,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:46,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:46,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:46,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:46,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 98 transitions, 675 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) [2024-06-14 13:53:46,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:46,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:46,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:46,537 INFO L124 PetriNetUnfolderBase]: 1088/1888 cut-off events. [2024-06-14 13:53:46,538 INFO L125 PetriNetUnfolderBase]: For 70140/70141 co-relation queries the response was YES. [2024-06-14 13:53:46,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8871 conditions, 1888 events. 1088/1888 cut-off events. For 70140/70141 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10793 event pairs, 329 based on Foata normal form. 19/1903 useless extension candidates. Maximal degree in co-relation 8809. Up to 1050 conditions per place. [2024-06-14 13:53:46,549 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 100 selfloop transitions, 24 changer transitions 15/145 dead transitions. [2024-06-14 13:53:46,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 145 transitions, 1283 flow [2024-06-14 13:53:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:53:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:53:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-14 13:53:46,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-14 13:53:46,550 INFO L175 Difference]: Start difference. First operand has 135 places, 98 transitions, 675 flow. Second operand 12 states and 249 transitions. [2024-06-14 13:53:46,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 145 transitions, 1283 flow [2024-06-14 13:53:46,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 145 transitions, 1219 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:46,602 INFO L231 Difference]: Finished difference. Result has 130 places, 96 transitions, 664 flow [2024-06-14 13:53:46,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=664, PETRI_PLACES=130, PETRI_TRANSITIONS=96} [2024-06-14 13:53:46,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-14 13:53:46,603 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 96 transitions, 664 flow [2024-06-14 13:53:46,603 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) [2024-06-14 13:53:46,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:46,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:46,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:53:46,603 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:46,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2007177518, now seen corresponding path program 10 times [2024-06-14 13:53:46,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:46,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95344113] [2024-06-14 13:53:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:46,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:46,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:46,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95344113] [2024-06-14 13:53:46,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95344113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:46,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:46,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:46,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563826364] [2024-06-14 13:53:46,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:46,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:46,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:46,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:46,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 96 transitions, 664 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) [2024-06-14 13:53:46,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:46,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:46,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:47,207 INFO L124 PetriNetUnfolderBase]: 956/1650 cut-off events. [2024-06-14 13:53:47,207 INFO L125 PetriNetUnfolderBase]: For 48318/48319 co-relation queries the response was YES. [2024-06-14 13:53:47,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7334 conditions, 1650 events. 956/1650 cut-off events. For 48318/48319 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9140 event pairs, 317 based on Foata normal form. 19/1665 useless extension candidates. Maximal degree in co-relation 7275. Up to 1050 conditions per place. [2024-06-14 13:53:47,216 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 84 selfloop transitions, 21 changer transitions 18/129 dead transitions. [2024-06-14 13:53:47,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 129 transitions, 1102 flow [2024-06-14 13:53:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 13:53:47,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-06-14 13:53:47,217 INFO L175 Difference]: Start difference. First operand has 130 places, 96 transitions, 664 flow. Second operand 10 states and 207 transitions. [2024-06-14 13:53:47,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 129 transitions, 1102 flow [2024-06-14 13:53:47,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 129 transitions, 1047 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:47,251 INFO L231 Difference]: Finished difference. Result has 127 places, 93 transitions, 640 flow [2024-06-14 13:53:47,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=640, PETRI_PLACES=127, PETRI_TRANSITIONS=93} [2024-06-14 13:53:47,251 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-14 13:53:47,251 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 93 transitions, 640 flow [2024-06-14 13:53:47,252 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) [2024-06-14 13:53:47,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:47,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:47,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:53:47,252 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:47,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1652914478, now seen corresponding path program 11 times [2024-06-14 13:53:47,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:47,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284918619] [2024-06-14 13:53:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:47,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:47,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:47,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284918619] [2024-06-14 13:53:47,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284918619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:47,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:47,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:47,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412762264] [2024-06-14 13:53:47,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:47,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:47,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:47,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:47,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:47,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:47,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 93 transitions, 640 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:47,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:47,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:47,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:47,829 INFO L124 PetriNetUnfolderBase]: 1093/1876 cut-off events. [2024-06-14 13:53:47,830 INFO L125 PetriNetUnfolderBase]: For 61610/61610 co-relation queries the response was YES. [2024-06-14 13:53:47,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8842 conditions, 1876 events. 1093/1876 cut-off events. For 61610/61610 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10808 event pairs, 286 based on Foata normal form. 18/1889 useless extension candidates. Maximal degree in co-relation 8784. Up to 849 conditions per place. [2024-06-14 13:53:47,846 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 73 selfloop transitions, 22 changer transitions 22/123 dead transitions. [2024-06-14 13:53:47,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 123 transitions, 1071 flow [2024-06-14 13:53:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:53:47,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 13:53:47,848 INFO L175 Difference]: Start difference. First operand has 127 places, 93 transitions, 640 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:53:47,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 123 transitions, 1071 flow [2024-06-14 13:53:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 123 transitions, 1017 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:47,914 INFO L231 Difference]: Finished difference. Result has 120 places, 88 transitions, 603 flow [2024-06-14 13:53:47,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=603, PETRI_PLACES=120, PETRI_TRANSITIONS=88} [2024-06-14 13:53:47,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-14 13:53:47,915 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 88 transitions, 603 flow [2024-06-14 13:53:47,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:47,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:47,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:47,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:53:47,915 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:47,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:47,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1623946494, now seen corresponding path program 12 times [2024-06-14 13:53:47,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:47,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115184779] [2024-06-14 13:53:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:47,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:48,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:48,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115184779] [2024-06-14 13:53:48,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115184779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:48,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:48,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:48,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293379556] [2024-06-14 13:53:48,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:48,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:48,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:48,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:48,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:48,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 88 transitions, 603 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) [2024-06-14 13:53:48,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:48,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:48,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:48,467 INFO L124 PetriNetUnfolderBase]: 951/1621 cut-off events. [2024-06-14 13:53:48,468 INFO L125 PetriNetUnfolderBase]: For 46242/46242 co-relation queries the response was YES. [2024-06-14 13:53:48,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7155 conditions, 1621 events. 951/1621 cut-off events. For 46242/46242 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9014 event pairs, 394 based on Foata normal form. 26/1645 useless extension candidates. Maximal degree in co-relation 7099. Up to 1337 conditions per place. [2024-06-14 13:53:48,477 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 68 selfloop transitions, 17 changer transitions 12/103 dead transitions. [2024-06-14 13:53:48,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 103 transitions, 853 flow [2024-06-14 13:53:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 13:53:48,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725 [2024-06-14 13:53:48,478 INFO L175 Difference]: Start difference. First operand has 120 places, 88 transitions, 603 flow. Second operand 10 states and 189 transitions. [2024-06-14 13:53:48,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 103 transitions, 853 flow [2024-06-14 13:53:48,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 103 transitions, 796 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:48,503 INFO L231 Difference]: Finished difference. Result has 113 places, 84 transitions, 554 flow [2024-06-14 13:53:48,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=554, PETRI_PLACES=113, PETRI_TRANSITIONS=84} [2024-06-14 13:53:48,504 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-14 13:53:48,504 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 84 transitions, 554 flow [2024-06-14 13:53:48,504 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) [2024-06-14 13:53:48,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:48,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:48,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:53:48,504 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:48,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1784824960, now seen corresponding path program 6 times [2024-06-14 13:53:48,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:48,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772333411] [2024-06-14 13:53:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:48,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:48,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772333411] [2024-06-14 13:53:48,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772333411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:48,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:48,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145351948] [2024-06-14 13:53:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:48,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:48,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:48,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:48,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 84 transitions, 554 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) [2024-06-14 13:53:48,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:48,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:48,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:49,188 INFO L124 PetriNetUnfolderBase]: 990/1708 cut-off events. [2024-06-14 13:53:49,188 INFO L125 PetriNetUnfolderBase]: For 43256/43256 co-relation queries the response was YES. [2024-06-14 13:53:49,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7782 conditions, 1708 events. 990/1708 cut-off events. For 43256/43256 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9758 event pairs, 312 based on Foata normal form. 18/1724 useless extension candidates. Maximal degree in co-relation 7731. Up to 826 conditions per place. [2024-06-14 13:53:49,198 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 23 changer transitions 7/114 dead transitions. [2024-06-14 13:53:49,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 114 transitions, 1015 flow [2024-06-14 13:53:49,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-14 13:53:49,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49318181818181817 [2024-06-14 13:53:49,199 INFO L175 Difference]: Start difference. First operand has 113 places, 84 transitions, 554 flow. Second operand 11 states and 217 transitions. [2024-06-14 13:53:49,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 114 transitions, 1015 flow [2024-06-14 13:53:49,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 969 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:49,222 INFO L231 Difference]: Finished difference. Result has 113 places, 84 transitions, 578 flow [2024-06-14 13:53:49,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=578, PETRI_PLACES=113, PETRI_TRANSITIONS=84} [2024-06-14 13:53:49,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-14 13:53:49,223 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 84 transitions, 578 flow [2024-06-14 13:53:49,223 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) [2024-06-14 13:53:49,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:49,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:49,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:53:49,223 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:49,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1784830540, now seen corresponding path program 7 times [2024-06-14 13:53:49,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:49,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024097541] [2024-06-14 13:53:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:49,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:49,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024097541] [2024-06-14 13:53:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024097541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:49,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:49,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:49,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016634991] [2024-06-14 13:53:49,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:49,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:49,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:49,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:49,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 84 transitions, 578 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) [2024-06-14 13:53:49,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:49,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:49,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:49,828 INFO L124 PetriNetUnfolderBase]: 1092/1876 cut-off events. [2024-06-14 13:53:49,828 INFO L125 PetriNetUnfolderBase]: For 50833/50833 co-relation queries the response was YES. [2024-06-14 13:53:49,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9072 conditions, 1876 events. 1092/1876 cut-off events. For 50833/50833 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 10958 event pairs, 392 based on Foata normal form. 18/1892 useless extension candidates. Maximal degree in co-relation 9021. Up to 826 conditions per place. [2024-06-14 13:53:49,840 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 21 changer transitions 8/113 dead transitions. [2024-06-14 13:53:49,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 113 transitions, 1028 flow [2024-06-14 13:53:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-14 13:53:49,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-14 13:53:49,841 INFO L175 Difference]: Start difference. First operand has 113 places, 84 transitions, 578 flow. Second operand 11 states and 216 transitions. [2024-06-14 13:53:49,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 113 transitions, 1028 flow [2024-06-14 13:53:49,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 113 transitions, 989 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:49,868 INFO L231 Difference]: Finished difference. Result has 114 places, 82 transitions, 574 flow [2024-06-14 13:53:49,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=574, PETRI_PLACES=114, PETRI_TRANSITIONS=82} [2024-06-14 13:53:49,868 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-14 13:53:49,868 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 82 transitions, 574 flow [2024-06-14 13:53:49,868 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) [2024-06-14 13:53:49,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:49,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:49,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:53:49,869 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:49,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1283964892, now seen corresponding path program 8 times [2024-06-14 13:53:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:49,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782844595] [2024-06-14 13:53:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:50,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:50,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782844595] [2024-06-14 13:53:50,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782844595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:50,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:50,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:50,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828676678] [2024-06-14 13:53:50,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:50,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:50,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:50,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:50,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 82 transitions, 574 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) [2024-06-14 13:53:50,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:50,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:50,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:50,402 INFO L124 PetriNetUnfolderBase]: 974/1670 cut-off events. [2024-06-14 13:53:50,403 INFO L125 PetriNetUnfolderBase]: For 43481/43481 co-relation queries the response was YES. [2024-06-14 13:53:50,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 1670 events. 974/1670 cut-off events. For 43481/43481 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9473 event pairs, 392 based on Foata normal form. 24/1692 useless extension candidates. Maximal degree in co-relation 7719. Up to 1120 conditions per place. [2024-06-14 13:53:50,411 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 72 selfloop transitions, 18 changer transitions 8/104 dead transitions. [2024-06-14 13:53:50,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 104 transitions, 920 flow [2024-06-14 13:53:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 13:53:50,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-06-14 13:53:50,412 INFO L175 Difference]: Start difference. First operand has 114 places, 82 transitions, 574 flow. Second operand 10 states and 194 transitions. [2024-06-14 13:53:50,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 104 transitions, 920 flow [2024-06-14 13:53:50,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 104 transitions, 849 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 13:53:50,433 INFO L231 Difference]: Finished difference. Result has 112 places, 81 transitions, 536 flow [2024-06-14 13:53:50,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=536, PETRI_PLACES=112, PETRI_TRANSITIONS=81} [2024-06-14 13:53:50,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-14 13:53:50,434 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 81 transitions, 536 flow [2024-06-14 13:53:50,434 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) [2024-06-14 13:53:50,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:50,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:50,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:53:50,434 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:50,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:50,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1778908300, now seen corresponding path program 9 times [2024-06-14 13:53:50,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:50,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76527962] [2024-06-14 13:53:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:50,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:50,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76527962] [2024-06-14 13:53:50,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76527962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:50,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:50,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401640606] [2024-06-14 13:53:50,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:50,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:50,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:50,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:50,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 81 transitions, 536 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) [2024-06-14 13:53:50,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:50,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:50,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:50,929 INFO L124 PetriNetUnfolderBase]: 725/1251 cut-off events. [2024-06-14 13:53:50,930 INFO L125 PetriNetUnfolderBase]: For 23013/23013 co-relation queries the response was YES. [2024-06-14 13:53:50,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4917 conditions, 1251 events. 725/1251 cut-off events. For 23013/23013 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6686 event pairs, 281 based on Foata normal form. 26/1275 useless extension candidates. Maximal degree in co-relation 4867. Up to 998 conditions per place. [2024-06-14 13:53:50,935 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 13 changer transitions 12/95 dead transitions. [2024-06-14 13:53:50,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 95 transitions, 768 flow [2024-06-14 13:53:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:50,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:53:50,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-14 13:53:50,936 INFO L175 Difference]: Start difference. First operand has 112 places, 81 transitions, 536 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:53:50,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 95 transitions, 768 flow [2024-06-14 13:53:50,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 95 transitions, 730 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:50,952 INFO L231 Difference]: Finished difference. Result has 110 places, 77 transitions, 498 flow [2024-06-14 13:53:50,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=110, PETRI_TRANSITIONS=77} [2024-06-14 13:53:50,952 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-14 13:53:50,952 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 77 transitions, 498 flow [2024-06-14 13:53:50,952 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) [2024-06-14 13:53:50,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:50,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:50,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:53:50,953 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:50,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:50,953 INFO L85 PathProgramCache]: Analyzing trace with hash 719309850, now seen corresponding path program 10 times [2024-06-14 13:53:50,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:50,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565173825] [2024-06-14 13:53:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:50,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:51,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565173825] [2024-06-14 13:53:51,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565173825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:51,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:51,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:51,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986294726] [2024-06-14 13:53:51,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:51,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:51,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:51,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 77 transitions, 498 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) [2024-06-14 13:53:51,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:51,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:51,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:51,452 INFO L124 PetriNetUnfolderBase]: 710/1246 cut-off events. [2024-06-14 13:53:51,452 INFO L125 PetriNetUnfolderBase]: For 21949/21949 co-relation queries the response was YES. [2024-06-14 13:53:51,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 1246 events. 710/1246 cut-off events. For 21949/21949 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6726 event pairs, 243 based on Foata normal form. 24/1268 useless extension candidates. Maximal degree in co-relation 4755. Up to 950 conditions per place. [2024-06-14 13:53:51,459 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 61 selfloop transitions, 10 changer transitions 18/95 dead transitions. [2024-06-14 13:53:51,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 95 transitions, 754 flow [2024-06-14 13:53:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:53:51,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-14 13:53:51,460 INFO L175 Difference]: Start difference. First operand has 110 places, 77 transitions, 498 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:53:51,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 95 transitions, 754 flow [2024-06-14 13:53:51,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 95 transitions, 724 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:51,474 INFO L231 Difference]: Finished difference. Result has 108 places, 73 transitions, 460 flow [2024-06-14 13:53:51,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=460, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2024-06-14 13:53:51,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-14 13:53:51,475 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 460 flow [2024-06-14 13:53:51,475 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) [2024-06-14 13:53:51,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:51,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:51,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:53:51,475 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:51,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2097051972, now seen corresponding path program 11 times [2024-06-14 13:53:51,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329078810] [2024-06-14 13:53:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:51,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:51,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329078810] [2024-06-14 13:53:51,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329078810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:51,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:51,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:51,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14011089] [2024-06-14 13:53:51,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:51,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:51,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:51,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:51,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:51,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:51,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 460 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) [2024-06-14 13:53:51,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:51,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:51,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:52,051 INFO L124 PetriNetUnfolderBase]: 758/1336 cut-off events. [2024-06-14 13:53:52,051 INFO L125 PetriNetUnfolderBase]: For 25135/25135 co-relation queries the response was YES. [2024-06-14 13:53:52,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5464 conditions, 1336 events. 758/1336 cut-off events. For 25135/25135 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7306 event pairs, 108 based on Foata normal form. 18/1352 useless extension candidates. Maximal degree in co-relation 5415. Up to 734 conditions per place. [2024-06-14 13:53:52,057 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 72 selfloop transitions, 20 changer transitions 7/105 dead transitions. [2024-06-14 13:53:52,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 105 transitions, 843 flow [2024-06-14 13:53:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-14 13:53:52,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-14 13:53:52,058 INFO L175 Difference]: Start difference. First operand has 108 places, 73 transitions, 460 flow. Second operand 11 states and 215 transitions. [2024-06-14 13:53:52,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 105 transitions, 843 flow [2024-06-14 13:53:52,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 811 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:52,072 INFO L231 Difference]: Finished difference. Result has 107 places, 73 transitions, 479 flow [2024-06-14 13:53:52,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=479, PETRI_PLACES=107, PETRI_TRANSITIONS=73} [2024-06-14 13:53:52,073 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-14 13:53:52,073 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 73 transitions, 479 flow [2024-06-14 13:53:52,073 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) [2024-06-14 13:53:52,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:52,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:52,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:53:52,073 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:52,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:52,074 INFO L85 PathProgramCache]: Analyzing trace with hash 985187060, now seen corresponding path program 12 times [2024-06-14 13:53:52,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:52,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586429545] [2024-06-14 13:53:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:52,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:52,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586429545] [2024-06-14 13:53:52,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586429545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:52,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:52,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:52,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723356341] [2024-06-14 13:53:52,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:52,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:52,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:52,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:52,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:52,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:52,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 73 transitions, 479 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) [2024-06-14 13:53:52,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:52,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:52,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:52,563 INFO L124 PetriNetUnfolderBase]: 665/1177 cut-off events. [2024-06-14 13:53:52,563 INFO L125 PetriNetUnfolderBase]: For 16055/16055 co-relation queries the response was YES. [2024-06-14 13:53:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4559 conditions, 1177 events. 665/1177 cut-off events. For 16055/16055 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6278 event pairs, 96 based on Foata normal form. 18/1193 useless extension candidates. Maximal degree in co-relation 4511. Up to 734 conditions per place. [2024-06-14 13:53:52,568 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 17 changer transitions 12/95 dead transitions. [2024-06-14 13:53:52,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 95 transitions, 749 flow [2024-06-14 13:53:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 13:53:52,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-14 13:53:52,569 INFO L175 Difference]: Start difference. First operand has 107 places, 73 transitions, 479 flow. Second operand 9 states and 178 transitions. [2024-06-14 13:53:52,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 95 transitions, 749 flow [2024-06-14 13:53:52,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 95 transitions, 710 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:52,581 INFO L231 Difference]: Finished difference. Result has 107 places, 71 transitions, 460 flow [2024-06-14 13:53:52,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=460, PETRI_PLACES=107, PETRI_TRANSITIONS=71} [2024-06-14 13:53:52,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-14 13:53:52,582 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 71 transitions, 460 flow [2024-06-14 13:53:52,582 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) [2024-06-14 13:53:52,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:52,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:52,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:53:52,582 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:52,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1719793582, now seen corresponding path program 13 times [2024-06-14 13:53:52,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:52,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385501393] [2024-06-14 13:53:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:52,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:52,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385501393] [2024-06-14 13:53:52,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385501393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:52,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:52,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:52,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441457058] [2024-06-14 13:53:52,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:52,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:52,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:52,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:52,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:52,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:52,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 71 transitions, 460 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:52,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:52,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:52,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:53,053 INFO L124 PetriNetUnfolderBase]: 661/1167 cut-off events. [2024-06-14 13:53:53,054 INFO L125 PetriNetUnfolderBase]: For 16012/16012 co-relation queries the response was YES. [2024-06-14 13:53:53,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 1167 events. 661/1167 cut-off events. For 16012/16012 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6205 event pairs, 116 based on Foata normal form. 18/1181 useless extension candidates. Maximal degree in co-relation 4453. Up to 698 conditions per place. [2024-06-14 13:53:53,061 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 54 selfloop transitions, 13 changer transitions 20/93 dead transitions. [2024-06-14 13:53:53,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 93 transitions, 729 flow [2024-06-14 13:53:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 13:53:53,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503125 [2024-06-14 13:53:53,063 INFO L175 Difference]: Start difference. First operand has 107 places, 71 transitions, 460 flow. Second operand 8 states and 161 transitions. [2024-06-14 13:53:53,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 93 transitions, 729 flow [2024-06-14 13:53:53,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 93 transitions, 691 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:53,080 INFO L231 Difference]: Finished difference. Result has 104 places, 66 transitions, 422 flow [2024-06-14 13:53:53,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=422, PETRI_PLACES=104, PETRI_TRANSITIONS=66} [2024-06-14 13:53:53,081 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-14 13:53:53,081 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 66 transitions, 422 flow [2024-06-14 13:53:53,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:53,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:53,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:53:53,082 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:53,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1873445066, now seen corresponding path program 14 times [2024-06-14 13:53:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034376297] [2024-06-14 13:53:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:53,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:53,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034376297] [2024-06-14 13:53:53,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034376297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:53,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:53,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509710024] [2024-06-14 13:53:53,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:53,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:53,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:53,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:53,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 66 transitions, 422 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:53,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:53,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:53,549 INFO L124 PetriNetUnfolderBase]: 639/1111 cut-off events. [2024-06-14 13:53:53,550 INFO L125 PetriNetUnfolderBase]: For 21749/21749 co-relation queries the response was YES. [2024-06-14 13:53:53,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4717 conditions, 1111 events. 639/1111 cut-off events. For 21749/21749 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5804 event pairs, 207 based on Foata normal form. 18/1126 useless extension candidates. Maximal degree in co-relation 4669. Up to 715 conditions per place. [2024-06-14 13:53:53,554 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 66 selfloop transitions, 10 changer transitions 12/94 dead transitions. [2024-06-14 13:53:53,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 94 transitions, 752 flow [2024-06-14 13:53:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-14 13:53:53,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 13:53:53,555 INFO L175 Difference]: Start difference. First operand has 104 places, 66 transitions, 422 flow. Second operand 11 states and 205 transitions. [2024-06-14 13:53:53,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 94 transitions, 752 flow [2024-06-14 13:53:53,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 693 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:53,566 INFO L231 Difference]: Finished difference. Result has 101 places, 64 transitions, 377 flow [2024-06-14 13:53:53,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=377, PETRI_PLACES=101, PETRI_TRANSITIONS=64} [2024-06-14 13:53:53,566 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-14 13:53:53,566 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 64 transitions, 377 flow [2024-06-14 13:53:53,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:53,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:53,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:53:53,567 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:53,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:53,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1713529728, now seen corresponding path program 15 times [2024-06-14 13:53:53,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:53,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637823996] [2024-06-14 13:53:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:53,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:53,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:53,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637823996] [2024-06-14 13:53:53,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637823996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:53,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:53,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:53,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436884684] [2024-06-14 13:53:53,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:53,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:53,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:53,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:53,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 64 transitions, 377 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:53,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:53,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:53,996 INFO L124 PetriNetUnfolderBase]: 534/928 cut-off events. [2024-06-14 13:53:53,996 INFO L125 PetriNetUnfolderBase]: For 15585/15585 co-relation queries the response was YES. [2024-06-14 13:53:53,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3618 conditions, 928 events. 534/928 cut-off events. For 15585/15585 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4576 event pairs, 197 based on Foata normal form. 18/943 useless extension candidates. Maximal degree in co-relation 3573. Up to 715 conditions per place. [2024-06-14 13:53:54,000 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 53 selfloop transitions, 7 changer transitions 15/81 dead transitions. [2024-06-14 13:53:54,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 81 transitions, 585 flow [2024-06-14 13:53:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:53:54,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-14 13:53:54,001 INFO L175 Difference]: Start difference. First operand has 101 places, 64 transitions, 377 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:53:54,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 81 transitions, 585 flow [2024-06-14 13:53:54,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 81 transitions, 562 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:54,012 INFO L231 Difference]: Finished difference. Result has 98 places, 61 transitions, 356 flow [2024-06-14 13:53:54,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=356, PETRI_PLACES=98, PETRI_TRANSITIONS=61} [2024-06-14 13:53:54,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-14 13:53:54,012 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 61 transitions, 356 flow [2024-06-14 13:53:54,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:54,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:54,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:54,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:53:54,013 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:54,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash 500985540, now seen corresponding path program 16 times [2024-06-14 13:53:54,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:54,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412450546] [2024-06-14 13:53:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:54,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:54,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412450546] [2024-06-14 13:53:54,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412450546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:54,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:54,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:53:54,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361839657] [2024-06-14 13:53:54,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:54,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:53:54,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:53:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:53:54,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:54,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 61 transitions, 356 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) [2024-06-14 13:53:54,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:54,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:54,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:54,494 INFO L124 PetriNetUnfolderBase]: 607/1061 cut-off events. [2024-06-14 13:53:54,494 INFO L125 PetriNetUnfolderBase]: For 21916/21916 co-relation queries the response was YES. [2024-06-14 13:53:54,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 1061 events. 607/1061 cut-off events. For 21916/21916 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5485 event pairs, 258 based on Foata normal form. 24/1084 useless extension candidates. Maximal degree in co-relation 4375. Up to 496 conditions per place. [2024-06-14 13:53:54,498 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 51 selfloop transitions, 12 changer transitions 16/85 dead transitions. [2024-06-14 13:53:54,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 85 transitions, 666 flow [2024-06-14 13:53:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 13:53:54,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-14 13:53:54,499 INFO L175 Difference]: Start difference. First operand has 98 places, 61 transitions, 356 flow. Second operand 10 states and 192 transitions. [2024-06-14 13:53:54,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 85 transitions, 666 flow [2024-06-14 13:53:54,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 85 transitions, 644 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:54,508 INFO L231 Difference]: Finished difference. Result has 95 places, 57 transitions, 338 flow [2024-06-14 13:53:54,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=338, PETRI_PLACES=95, PETRI_TRANSITIONS=57} [2024-06-14 13:53:54,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-14 13:53:54,509 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 57 transitions, 338 flow [2024-06-14 13:53:54,509 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) [2024-06-14 13:53:54,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:54,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:54,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:53:54,510 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:54,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:54,510 INFO L85 PathProgramCache]: Analyzing trace with hash -446137168, now seen corresponding path program 17 times [2024-06-14 13:53:54,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:54,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800595862] [2024-06-14 13:53:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:54,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:54,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800595862] [2024-06-14 13:53:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800595862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:54,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:54,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:53:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013015791] [2024-06-14 13:53:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:54,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:53:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:54,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:53:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:53:54,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:54,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 57 transitions, 338 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) [2024-06-14 13:53:54,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:54,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:54,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:54,970 INFO L124 PetriNetUnfolderBase]: 547/953 cut-off events. [2024-06-14 13:53:54,970 INFO L125 PetriNetUnfolderBase]: For 20201/20201 co-relation queries the response was YES. [2024-06-14 13:53:54,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 953 events. 547/953 cut-off events. For 20201/20201 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4752 event pairs, 242 based on Foata normal form. 24/976 useless extension candidates. Maximal degree in co-relation 4011. Up to 496 conditions per place. [2024-06-14 13:53:54,973 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 50 selfloop transitions, 11 changer transitions 10/77 dead transitions. [2024-06-14 13:53:54,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 77 transitions, 606 flow [2024-06-14 13:53:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 13:53:54,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-14 13:53:54,974 INFO L175 Difference]: Start difference. First operand has 95 places, 57 transitions, 338 flow. Second operand 10 states and 186 transitions. [2024-06-14 13:53:54,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 77 transitions, 606 flow [2024-06-14 13:53:54,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 77 transitions, 575 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:54,981 INFO L231 Difference]: Finished difference. Result has 92 places, 54 transitions, 316 flow [2024-06-14 13:53:54,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=316, PETRI_PLACES=92, PETRI_TRANSITIONS=54} [2024-06-14 13:53:54,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-14 13:53:54,981 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 54 transitions, 316 flow [2024-06-14 13:53:54,982 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) [2024-06-14 13:53:54,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:54,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:54,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:53:54,982 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:54,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:54,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2015717714, now seen corresponding path program 18 times [2024-06-14 13:53:54,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:54,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039262956] [2024-06-14 13:53:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:54,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:55,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:55,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039262956] [2024-06-14 13:53:55,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039262956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:55,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:55,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:53:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927030438] [2024-06-14 13:53:55,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:55,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:53:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:53:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:53:55,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:55,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 54 transitions, 316 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) [2024-06-14 13:53:55,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:55,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:55,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:55,442 INFO L124 PetriNetUnfolderBase]: 396/696 cut-off events. [2024-06-14 13:53:55,442 INFO L125 PetriNetUnfolderBase]: For 11233/11233 co-relation queries the response was YES. [2024-06-14 13:53:55,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2592 conditions, 696 events. 396/696 cut-off events. For 11233/11233 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3203 event pairs, 197 based on Foata normal form. 26/721 useless extension candidates. Maximal degree in co-relation 2551. Up to 496 conditions per place. [2024-06-14 13:53:55,445 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 39 selfloop transitions, 5 changer transitions 16/66 dead transitions. [2024-06-14 13:53:55,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 66 transitions, 476 flow [2024-06-14 13:53:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:53:55,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 13:53:55,446 INFO L175 Difference]: Start difference. First operand has 92 places, 54 transitions, 316 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:53:55,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 66 transitions, 476 flow [2024-06-14 13:53:55,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 66 transitions, 453 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:55,451 INFO L231 Difference]: Finished difference. Result has 90 places, 47 transitions, 253 flow [2024-06-14 13:53:55,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=90, PETRI_TRANSITIONS=47} [2024-06-14 13:53:55,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-14 13:53:55,451 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 47 transitions, 253 flow [2024-06-14 13:53:55,451 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) [2024-06-14 13:53:55,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:55,451 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, 1] [2024-06-14 13:53:55,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:53:55,452 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:55,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1713673878, now seen corresponding path program 19 times [2024-06-14 13:53:55,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:55,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949189203] [2024-06-14 13:53:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:55,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:55,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:55,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949189203] [2024-06-14 13:53:55,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949189203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:55,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:55,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:53:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706650225] [2024-06-14 13:53:55,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:55,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:53:55,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:55,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:53:55,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:53:55,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:55,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 47 transitions, 253 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) [2024-06-14 13:53:55,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:55,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:55,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:55,900 INFO L124 PetriNetUnfolderBase]: 359/645 cut-off events. [2024-06-14 13:53:55,901 INFO L125 PetriNetUnfolderBase]: For 8382/8382 co-relation queries the response was YES. [2024-06-14 13:53:55,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317 conditions, 645 events. 359/645 cut-off events. For 8382/8382 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2911 event pairs, 141 based on Foata normal form. 18/662 useless extension candidates. Maximal degree in co-relation 2277. Up to 422 conditions per place. [2024-06-14 13:53:55,903 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 35 selfloop transitions, 3 changer transitions 22/66 dead transitions. [2024-06-14 13:53:55,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 66 transitions, 443 flow [2024-06-14 13:53:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:53:55,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 13:53:55,904 INFO L175 Difference]: Start difference. First operand has 90 places, 47 transitions, 253 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:53:55,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 66 transitions, 443 flow [2024-06-14 13:53:55,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 66 transitions, 410 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:55,908 INFO L231 Difference]: Finished difference. Result has 80 places, 42 transitions, 207 flow [2024-06-14 13:53:55,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=207, PETRI_PLACES=80, PETRI_TRANSITIONS=42} [2024-06-14 13:53:55,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-14 13:53:55,908 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 42 transitions, 207 flow [2024-06-14 13:53:55,908 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) [2024-06-14 13:53:55,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:55,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:55,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:53:55,909 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:55,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1800147348, now seen corresponding path program 20 times [2024-06-14 13:53:55,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:55,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102047606] [2024-06-14 13:53:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:55,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102047606] [2024-06-14 13:53:56,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102047606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:56,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:56,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:53:56,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051209534] [2024-06-14 13:53:56,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:56,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:53:56,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:53:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:53:56,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:56,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 42 transitions, 207 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) [2024-06-14 13:53:56,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:56,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:56,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:56,398 INFO L124 PetriNetUnfolderBase]: 393/711 cut-off events. [2024-06-14 13:53:56,398 INFO L125 PetriNetUnfolderBase]: For 8676/8676 co-relation queries the response was YES. [2024-06-14 13:53:56,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 711 events. 393/711 cut-off events. For 8676/8676 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3373 event pairs, 70 based on Foata normal form. 18/728 useless extension candidates. Maximal degree in co-relation 2577. Up to 204 conditions per place. [2024-06-14 13:53:56,400 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 41 selfloop transitions, 13 changer transitions 13/73 dead transitions. [2024-06-14 13:53:56,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 73 transitions, 479 flow [2024-06-14 13:53:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-14 13:53:56,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 13:53:56,401 INFO L175 Difference]: Start difference. First operand has 80 places, 42 transitions, 207 flow. Second operand 11 states and 206 transitions. [2024-06-14 13:53:56,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 73 transitions, 479 flow [2024-06-14 13:53:56,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 451 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:56,404 INFO L231 Difference]: Finished difference. Result has 73 places, 39 transitions, 202 flow [2024-06-14 13:53:56,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=202, PETRI_PLACES=73, PETRI_TRANSITIONS=39} [2024-06-14 13:53:56,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-14 13:53:56,404 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 39 transitions, 202 flow [2024-06-14 13:53:56,405 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) [2024-06-14 13:53:56,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:56,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:56,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:53:56,405 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:56,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:56,405 INFO L85 PathProgramCache]: Analyzing trace with hash -45136286, now seen corresponding path program 21 times [2024-06-14 13:53:56,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:56,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506638164] [2024-06-14 13:53:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:56,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:56,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:56,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506638164] [2024-06-14 13:53:56,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506638164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:56,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:56,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:56,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931336945] [2024-06-14 13:53:56,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:56,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:56,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:56,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:56,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:56,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 39 transitions, 202 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:56,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:56,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:56,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:56,862 INFO L124 PetriNetUnfolderBase]: 450/818 cut-off events. [2024-06-14 13:53:56,862 INFO L125 PetriNetUnfolderBase]: For 7104/7104 co-relation queries the response was YES. [2024-06-14 13:53:56,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3054 conditions, 818 events. 450/818 cut-off events. For 7104/7104 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4167 event pairs, 118 based on Foata normal form. 18/835 useless extension candidates. Maximal degree in co-relation 3023. Up to 387 conditions per place. [2024-06-14 13:53:56,865 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 12 changer transitions 8/69 dead transitions. [2024-06-14 13:53:56,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 69 transitions, 455 flow [2024-06-14 13:53:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-14 13:53:56,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 13:53:56,866 INFO L175 Difference]: Start difference. First operand has 73 places, 39 transitions, 202 flow. Second operand 11 states and 206 transitions. [2024-06-14 13:53:56,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 69 transitions, 455 flow [2024-06-14 13:53:56,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 419 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:56,868 INFO L231 Difference]: Finished difference. Result has 70 places, 38 transitions, 194 flow [2024-06-14 13:53:56,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=194, PETRI_PLACES=70, PETRI_TRANSITIONS=38} [2024-06-14 13:53:56,868 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-14 13:53:56,869 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 38 transitions, 194 flow [2024-06-14 13:53:56,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:56,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:56,869 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, 1, 1] [2024-06-14 13:53:56,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:53:56,869 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:56,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1735467596, now seen corresponding path program 22 times [2024-06-14 13:53:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:56,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807543996] [2024-06-14 13:53:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:56,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807543996] [2024-06-14 13:53:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807543996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:57,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:57,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185890936] [2024-06-14 13:53:57,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:57,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:57,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:57,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:57,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 38 transitions, 194 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:57,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:57,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:57,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:57,308 INFO L124 PetriNetUnfolderBase]: 345/631 cut-off events. [2024-06-14 13:53:57,308 INFO L125 PetriNetUnfolderBase]: For 4008/4008 co-relation queries the response was YES. [2024-06-14 13:53:57,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2248 conditions, 631 events. 345/631 cut-off events. For 4008/4008 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2944 event pairs, 106 based on Foata normal form. 18/648 useless extension candidates. Maximal degree in co-relation 2219. Up to 387 conditions per place. [2024-06-14 13:53:57,310 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 30 selfloop transitions, 8 changer transitions 16/60 dead transitions. [2024-06-14 13:53:57,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 60 transitions, 370 flow [2024-06-14 13:53:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:53:57,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 13:53:57,311 INFO L175 Difference]: Start difference. First operand has 70 places, 38 transitions, 194 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:53:57,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 60 transitions, 370 flow [2024-06-14 13:53:57,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 343 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:57,313 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 165 flow [2024-06-14 13:53:57,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=165, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2024-06-14 13:53:57,313 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-14 13:53:57,313 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 165 flow [2024-06-14 13:53:57,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:57,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:57,314 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, 1, 1] [2024-06-14 13:53:57,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:53:57,314 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:57,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:57,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2006950518, now seen corresponding path program 23 times [2024-06-14 13:53:57,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:57,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91110271] [2024-06-14 13:53:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:57,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:57,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:57,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91110271] [2024-06-14 13:53:57,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91110271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:57,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:57,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:57,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041161231] [2024-06-14 13:53:57,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:57,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:57,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:57,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:57,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:57,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:57,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:57,674 INFO L124 PetriNetUnfolderBase]: 232/435 cut-off events. [2024-06-14 13:53:57,674 INFO L125 PetriNetUnfolderBase]: For 2282/2282 co-relation queries the response was YES. [2024-06-14 13:53:57,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 435 events. 232/435 cut-off events. For 2282/2282 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1821 event pairs, 13 based on Foata normal form. 18/451 useless extension candidates. Maximal degree in co-relation 1428. Up to 159 conditions per place. [2024-06-14 13:53:57,675 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 7 changer transitions 13/57 dead transitions. [2024-06-14 13:53:57,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 343 flow [2024-06-14 13:53:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 13:53:57,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-14 13:53:57,676 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 165 flow. Second operand 10 states and 181 transitions. [2024-06-14 13:53:57,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 343 flow [2024-06-14 13:53:57,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 325 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:57,677 INFO L231 Difference]: Finished difference. Result has 65 places, 31 transitions, 146 flow [2024-06-14 13:53:57,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=146, PETRI_PLACES=65, PETRI_TRANSITIONS=31} [2024-06-14 13:53:57,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-14 13:53:57,678 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 31 transitions, 146 flow [2024-06-14 13:53:57,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:57,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:57,678 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, 1] [2024-06-14 13:53:57,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:53:57,678 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:57,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:57,678 INFO L85 PathProgramCache]: Analyzing trace with hash -784872132, now seen corresponding path program 24 times [2024-06-14 13:53:57,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:57,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247382958] [2024-06-14 13:53:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:57,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:57,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:57,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247382958] [2024-06-14 13:53:57,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247382958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:57,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:57,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:57,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114882252] [2024-06-14 13:53:57,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:57,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:57,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:57,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:57,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:57,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:57,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 31 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:57,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:57,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:57,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:58,104 INFO L124 PetriNetUnfolderBase]: 188/364 cut-off events. [2024-06-14 13:53:58,104 INFO L125 PetriNetUnfolderBase]: For 2200/2200 co-relation queries the response was YES. [2024-06-14 13:53:58,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 364 events. 188/364 cut-off events. For 2200/2200 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1486 event pairs, 12 based on Foata normal form. 18/381 useless extension candidates. Maximal degree in co-relation 1215. Up to 147 conditions per place. [2024-06-14 13:53:58,106 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 28 selfloop transitions, 7 changer transitions 12/53 dead transitions. [2024-06-14 13:53:58,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 53 transitions, 308 flow [2024-06-14 13:53:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 13:53:58,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-14 13:53:58,107 INFO L175 Difference]: Start difference. First operand has 65 places, 31 transitions, 146 flow. Second operand 11 states and 191 transitions. [2024-06-14 13:53:58,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 53 transitions, 308 flow [2024-06-14 13:53:58,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 53 transitions, 282 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:58,109 INFO L231 Difference]: Finished difference. Result has 62 places, 29 transitions, 128 flow [2024-06-14 13:53:58,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=128, PETRI_PLACES=62, PETRI_TRANSITIONS=29} [2024-06-14 13:53:58,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-14 13:53:58,110 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 29 transitions, 128 flow [2024-06-14 13:53:58,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:58,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:58,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:53:58,111 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:58,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:58,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2074337224, now seen corresponding path program 25 times [2024-06-14 13:53:58,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:58,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020347420] [2024-06-14 13:53:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:58,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:58,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020347420] [2024-06-14 13:53:58,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020347420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:58,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:58,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:58,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003754698] [2024-06-14 13:53:58,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:58,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 13:53:58,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 29 transitions, 128 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:58,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 13:53:58,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:58,561 INFO L124 PetriNetUnfolderBase]: 83/177 cut-off events. [2024-06-14 13:53:58,561 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2024-06-14 13:53:58,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 177 events. 83/177 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 512 event pairs, 0 based on Foata normal form. 18/194 useless extension candidates. Maximal degree in co-relation 508. Up to 96 conditions per place. [2024-06-14 13:53:58,562 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2024-06-14 13:53:58,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 40 transitions, 206 flow [2024-06-14 13:53:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:53:58,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-14 13:53:58,562 INFO L175 Difference]: Start difference. First operand has 62 places, 29 transitions, 128 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:53:58,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 40 transitions, 206 flow [2024-06-14 13:53:58,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 40 transitions, 177 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-14 13:53:58,563 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2024-06-14 13:53:58,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2024-06-14 13:53:58,563 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-14 13:53:58,563 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2024-06-14 13:53:58,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-14 13:53:58,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-14 13:53:58,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-14 13:53:58,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-14 13:53:58,566 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-14 13:53:58,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-14 13:53:58,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:53:58,567 INFO L445 BasicCegarLoop]: Path program histogram: [25, 12, 10, 7, 7, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:58,570 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 13:53:58,570 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 13:53:58,573 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-14 13:53:58,573 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-14 13:53:58,574 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 01:53:58 BasicIcfg [2024-06-14 13:53:58,574 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 13:53:58,575 INFO L158 Benchmark]: Toolchain (without parser) took 95462.53ms. Allocated memory was 159.4MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 118.0MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 747.8MB. Max. memory is 16.1GB. [2024-06-14 13:53:58,575 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 13:53:58,575 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 123.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 13:53:58,575 INFO L158 Benchmark]: CACSL2BoogieTranslator took 623.23ms. Allocated memory is still 159.4MB. Free memory was 118.0MB in the beginning and 88.6MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-06-14 13:53:58,576 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.99ms. Allocated memory is still 159.4MB. Free memory was 88.6MB in the beginning and 85.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 13:53:58,576 INFO L158 Benchmark]: Boogie Preprocessor took 74.62ms. Allocated memory is still 159.4MB. Free memory was 85.5MB in the beginning and 83.4MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-14 13:53:58,576 INFO L158 Benchmark]: RCFGBuilder took 666.30ms. Allocated memory is still 159.4MB. Free memory was 83.4MB in the beginning and 89.2MB in the end (delta: -5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-06-14 13:53:58,576 INFO L158 Benchmark]: TraceAbstraction took 94020.18ms. Allocated memory was 159.4MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 89.2MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 722.1MB. Max. memory is 16.1GB. [2024-06-14 13:53:58,577 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 123.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 623.23ms. Allocated memory is still 159.4MB. Free memory was 118.0MB in the beginning and 88.6MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.99ms. Allocated memory is still 159.4MB. Free memory was 88.6MB in the beginning and 85.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.62ms. Allocated memory is still 159.4MB. Free memory was 85.5MB in the beginning and 83.4MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 666.30ms. Allocated memory is still 159.4MB. Free memory was 83.4MB in the beginning and 89.2MB in the end (delta: -5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 94020.18ms. Allocated memory was 159.4MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 89.2MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 722.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 776]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 779]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 64 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 93.9s, OverallIterations: 123, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 60.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9815 SdHoareTripleChecker+Valid, 18.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8324 mSDsluCounter, 2927 SdHoareTripleChecker+Invalid, 15.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2073 mSDsCounter, 1333 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 36463 IncrementalHoareTripleChecker+Invalid, 37796 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1333 mSolverCounterUnsat, 854 mSDtfsCounter, 36463 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1126 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1033 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1719occurred in iteration=30, InterpolantAutomatonStates: 996, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 32.1s InterpolantComputationTime, 2367 NumberOfCodeBlocks, 2367 NumberOfCodeBlocksAsserted, 123 NumberOfCheckSat, 2244 ConstructedInterpolants, 0 QuantifiedInterpolants, 22805 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 123 InterpolantComputations, 123 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-14 13:53:58,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE