./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_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/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:52:09,561 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:52:09,630 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:52:09,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:52:09,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:52:09,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:52:09,662 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:52:09,663 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:52:09,663 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:52:09,666 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:52:09,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:52:09,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:52:09,667 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:52:09,668 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:52:09,668 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:52:09,668 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:52:09,668 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:52:09,669 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:52:09,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:52:09,669 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:52:09,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:52:09,669 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:52:09,670 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:52:09,670 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:52:09,670 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:52:09,670 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:52:09,670 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:52:09,670 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:52:09,671 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:52:09,671 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:52:09,672 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:52:09,672 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:52:09,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:52:09,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:52:09,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:52:09,673 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:52:09,673 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:52:09,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:52:09,673 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:52:09,673 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:52:09,673 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:52:09,674 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:52:09,674 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:52:09,674 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:52:09,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:52:09,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:52:09,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:52:09,923 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:52:09,923 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:52:09,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:52:10,940 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:52:11,147 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:52:11,148 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:52:11,158 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b092a264/0a456536869c4025b63d3a9200735999/FLAGf7475f27d [2024-06-03 20:52:11,167 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b092a264/0a456536869c4025b63d3a9200735999 [2024-06-03 20:52:11,169 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:52:11,176 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:52:11,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 20:52:11,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:52:11,327 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:52:11,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:52:11,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:52:11,332 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:52:11,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:52:11" (1/2) ... [2024-06-03 20:52:11,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8a6ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:52:11, skipping insertion in model container [2024-06-03 20:52:11,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:52:11" (1/2) ... [2024-06-03 20:52:11,340 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@760799bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:52:11, skipping insertion in model container [2024-06-03 20:52:11,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:52:11" (2/2) ... [2024-06-03 20:52:11,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8a6ef8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11, skipping insertion in model container [2024-06-03 20:52:11,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:52:11" (2/2) ... [2024-06-03 20:52:11,342 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:52:11,394 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:52:11,395 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ((((((((((! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )a >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )z >= 0LL) && (long long )a + (long long )main$tmp_guard1 >= 0LL) && (long long )a + (long long )x >= 0LL) && (long long )a + (long long )y >= 0LL) && (long long )a + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 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 )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )x >= 0LL) && (1LL + (long long )a) - (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 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p3_EAX) && 0 <= a) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p3_EAX <= 1) && a <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1))) [2024-06-03 20:52:11,395 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((((! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 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 )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 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 )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )a >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )z >= 0LL) && (long long )a + (long long )main$tmp_guard1 >= 0LL) && (long long )a + (long long )x >= 0LL) && (long long )a + (long long )y >= 0LL) && (long long )a + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )x >= 0LL) && (1LL + (long long )a) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p3_EAX) && 0 <= a) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p3_EAX <= 1) && a <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1))) [2024-06-03 20:52:11,396 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ((((((((((! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )a >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )z >= 0LL) && (long long )a + (long long )main$tmp_guard1 >= 0LL) && (long long )a + (long long )x >= 0LL) && (long long )a + (long long )y >= 0LL) && (long long )a + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 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 )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )x >= 0LL) && (1LL + (long long )a) - (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 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p3_EAX) && 0 <= a) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p3_EAX <= 1) && a <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1))) [2024-06-03 20:52:11,396 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ((((((((((! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 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 )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 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 )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )a >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )z >= 0LL) && (long long )a + (long long )main$tmp_guard1 >= 0LL) && (long long )a + (long long )x >= 0LL) && (long long )a + (long long )y >= 0LL) && (long long )a + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )x >= 0LL) && (1LL + (long long )a) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p3_EAX) && 0 <= a) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p3_EAX <= 1) && a <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1))) [2024-06-03 20:52:11,396 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:52:11,397 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-03 20:52:11,437 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:52:11,722 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:52:11,729 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:52:11,870 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:52:11,898 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:52:11,899 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11 WrapperNode [2024-06-03 20:52:11,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:52:11,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:52:11,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:52:11,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:52:11,905 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 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:11,919 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 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:11,953 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-06-03 20:52:11,954 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:52:11,955 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:52:11,955 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:52:11,955 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:52:11,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:11,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:11,975 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:11,991 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:52:11,993 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:11,993 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:12,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:12,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:12,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:12,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:12,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:52:12,059 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:52:12,059 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:52:12,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:52:12,060 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (1/1) ... [2024-06-03 20:52:12,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:52:12,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:52:12,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:52:12,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:52:12,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:52:12,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:52:12,128 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:52:12,128 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:52:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:52:12,129 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:52:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:52:12,129 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:52:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 20:52:12,130 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 20:52:12,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:52:12,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:52:12,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:52:12,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:52:12,131 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:52:12,255 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:52:12,256 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:52:12,648 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:52:12,649 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:52:12,764 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:52:12,765 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:52:12,765 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:52:12 BoogieIcfgContainer [2024-06-03 20:52:12,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:52:12,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:52:12,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:52:12,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:52:12,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:52:11" (1/4) ... [2024-06-03 20:52:12,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e081f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:52:12, skipping insertion in model container [2024-06-03 20:52:12,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:52:11" (2/4) ... [2024-06-03 20:52:12,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e081f1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:52:12, skipping insertion in model container [2024-06-03 20:52:12,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:52:11" (3/4) ... [2024-06-03 20:52:12,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e081f1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:52:12, skipping insertion in model container [2024-06-03 20:52:12,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:52:12" (4/4) ... [2024-06-03 20:52:12,772 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:52:12,784 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:52:12,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 20:52:12,785 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:52:12,849 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:52:12,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-03 20:52:12,911 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-03 20:52:12,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:52:12,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:52:12,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-03 20:52:12,917 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-03 20:52:12,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:52:12,941 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;@2d9e2095, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:52:12,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 20:52:12,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:52:12,944 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:52:12,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:52:12,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:12,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:52:12,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:12,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:12,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1238650552, now seen corresponding path program 1 times [2024-06-03 20:52:12,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:12,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123200076] [2024-06-03 20:52:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:12,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:13,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123200076] [2024-06-03 20:52:13,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123200076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:13,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:13,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:52:13,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634784303] [2024-06-03 20:52:13,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:13,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:52:13,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:13,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:52:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:52:13,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 52 [2024-06-03 20:52:13,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:13,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:13,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 52 [2024-06-03 20:52:13,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:14,548 INFO L124 PetriNetUnfolderBase]: 2723/4078 cut-off events. [2024-06-03 20:52:14,549 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-03 20:52:14,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8080 conditions, 4078 events. 2723/4078 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22549 event pairs, 1898 based on Foata normal form. 1/3992 useless extension candidates. Maximal degree in co-relation 8064. Up to 3813 conditions per place. [2024-06-03 20:52:14,581 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 39 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-03 20:52:14,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 221 flow [2024-06-03 20:52:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:52:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:52:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-06-03 20:52:14,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2024-06-03 20:52:14,592 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 108 transitions. [2024-06-03 20:52:14,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 221 flow [2024-06-03 20:52:14,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:14,599 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-03 20:52:14,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-03 20:52:14,603 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-03 20:52:14,603 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-03 20:52:14,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:14,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:14,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:14,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:52:14,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:14,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:14,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1721547629, now seen corresponding path program 1 times [2024-06-03 20:52:14,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:14,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386777273] [2024-06-03 20:52:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:14,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:15,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386777273] [2024-06-03 20:52:15,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386777273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:15,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:15,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:52:15,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730066035] [2024-06-03 20:52:15,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:52:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:15,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:52:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:52:15,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:15,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:15,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:15,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:15,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:15,859 INFO L124 PetriNetUnfolderBase]: 4389/6482 cut-off events. [2024-06-03 20:52:15,859 INFO L125 PetriNetUnfolderBase]: For 1055/1077 co-relation queries the response was YES. [2024-06-03 20:52:15,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14774 conditions, 6482 events. 4389/6482 cut-off events. For 1055/1077 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36434 event pairs, 2308 based on Foata normal form. 10/6482 useless extension candidates. Maximal degree in co-relation 14759. Up to 6039 conditions per place. [2024-06-03 20:52:15,939 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 56 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-06-03 20:52:15,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 344 flow [2024-06-03 20:52:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:52:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:52:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-03 20:52:15,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2024-06-03 20:52:15,942 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 137 transitions. [2024-06-03 20:52:15,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 344 flow [2024-06-03 20:52:15,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:52:15,944 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 202 flow [2024-06-03 20:52:15,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-03 20:52:15,944 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-06-03 20:52:15,945 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 202 flow [2024-06-03 20:52:15,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:15,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:15,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:15,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:52:15,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:15,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1846111926, now seen corresponding path program 1 times [2024-06-03 20:52:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:15,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723140555] [2024-06-03 20:52:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:15,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:16,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:16,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723140555] [2024-06-03 20:52:16,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723140555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:16,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:16,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:52:16,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119547080] [2024-06-03 20:52:16,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:16,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:52:16,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:16,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:52:16,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:52:16,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:16,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 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) [2024-06-03 20:52:16,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:16,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:16,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:17,289 INFO L124 PetriNetUnfolderBase]: 4373/6454 cut-off events. [2024-06-03 20:52:17,289 INFO L125 PetriNetUnfolderBase]: For 3049/3136 co-relation queries the response was YES. [2024-06-03 20:52:17,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16582 conditions, 6454 events. 4373/6454 cut-off events. For 3049/3136 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36274 event pairs, 1831 based on Foata normal form. 32/6476 useless extension candidates. Maximal degree in co-relation 16564. Up to 5973 conditions per place. [2024-06-03 20:52:17,327 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 63 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-03 20:52:17,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 436 flow [2024-06-03 20:52:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:52:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:52:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-03 20:52:17,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-03 20:52:17,332 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 202 flow. Second operand 5 states and 165 transitions. [2024-06-03 20:52:17,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 436 flow [2024-06-03 20:52:17,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 432 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:52:17,338 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 248 flow [2024-06-03 20:52:17,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-03 20:52:17,339 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-03 20:52:17,339 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 248 flow [2024-06-03 20:52:17,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 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) [2024-06-03 20:52:17,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:17,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:17,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:52:17,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:17,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1305937115, now seen corresponding path program 1 times [2024-06-03 20:52:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:17,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459473515] [2024-06-03 20:52:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:17,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:17,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459473515] [2024-06-03 20:52:17,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459473515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:17,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:17,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:52:17,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550571321] [2024-06-03 20:52:17,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:17,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:52:17,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:17,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:52:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:52:17,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:17,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:17,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:17,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:17,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:18,554 INFO L124 PetriNetUnfolderBase]: 4310/6335 cut-off events. [2024-06-03 20:52:18,555 INFO L125 PetriNetUnfolderBase]: For 5513/5523 co-relation queries the response was YES. [2024-06-03 20:52:18,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17800 conditions, 6335 events. 4310/6335 cut-off events. For 5513/5523 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 35990 event pairs, 2266 based on Foata normal form. 6/6330 useless extension candidates. Maximal degree in co-relation 17779. Up to 5934 conditions per place. [2024-06-03 20:52:18,592 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 63 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-03 20:52:18,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 500 flow [2024-06-03 20:52:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:52:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:52:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-03 20:52:18,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-03 20:52:18,594 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 248 flow. Second operand 4 states and 132 transitions. [2024-06-03 20:52:18,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 500 flow [2024-06-03 20:52:18,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 464 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:18,600 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 325 flow [2024-06-03 20:52:18,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=325, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-03 20:52:18,601 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-03 20:52:18,602 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 325 flow [2024-06-03 20:52:18,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:18,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:18,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:18,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:52:18,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:18,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:18,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1413391936, now seen corresponding path program 1 times [2024-06-03 20:52:18,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:18,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193294981] [2024-06-03 20:52:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:18,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:19,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:19,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193294981] [2024-06-03 20:52:19,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193294981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:19,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:19,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:52:19,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731118405] [2024-06-03 20:52:19,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:19,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:52:19,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:52:19,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:52:19,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:19,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 325 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:19,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:19,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:19,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:20,007 INFO L124 PetriNetUnfolderBase]: 5207/7677 cut-off events. [2024-06-03 20:52:20,008 INFO L125 PetriNetUnfolderBase]: For 11031/11297 co-relation queries the response was YES. [2024-06-03 20:52:20,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23683 conditions, 7677 events. 5207/7677 cut-off events. For 11031/11297 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44253 event pairs, 2250 based on Foata normal form. 57/7672 useless extension candidates. Maximal degree in co-relation 23660. Up to 7050 conditions per place. [2024-06-03 20:52:20,052 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 68 selfloop transitions, 25 changer transitions 0/105 dead transitions. [2024-06-03 20:52:20,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 665 flow [2024-06-03 20:52:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:52:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:52:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-03 20:52:20,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-03 20:52:20,054 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 325 flow. Second operand 5 states and 169 transitions. [2024-06-03 20:52:20,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 665 flow [2024-06-03 20:52:20,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 657 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-03 20:52:20,062 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 438 flow [2024-06-03 20:52:20,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2024-06-03 20:52:20,068 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-03 20:52:20,069 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 438 flow [2024-06-03 20:52:20,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:20,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:20,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:52:20,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:20,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1402172416, now seen corresponding path program 2 times [2024-06-03 20:52:20,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:20,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822989507] [2024-06-03 20:52:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:20,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:20,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:20,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822989507] [2024-06-03 20:52:20,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822989507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:20,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:20,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:52:20,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001642562] [2024-06-03 20:52:20,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:20,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:52:20,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:52:20,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:52:20,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:20,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:20,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:20,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:20,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:21,617 INFO L124 PetriNetUnfolderBase]: 5198/7665 cut-off events. [2024-06-03 20:52:21,618 INFO L125 PetriNetUnfolderBase]: For 17236/17544 co-relation queries the response was YES. [2024-06-03 20:52:21,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26021 conditions, 7665 events. 5198/7665 cut-off events. For 17236/17544 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44041 event pairs, 2250 based on Foata normal form. 65/7670 useless extension candidates. Maximal degree in co-relation 25995. Up to 7056 conditions per place. [2024-06-03 20:52:21,664 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 62 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-03 20:52:21,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 658 flow [2024-06-03 20:52:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:52:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:52:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-03 20:52:21,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2024-06-03 20:52:21,665 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 438 flow. Second operand 4 states and 137 transitions. [2024-06-03 20:52:21,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 658 flow [2024-06-03 20:52:21,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 615 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-03 20:52:21,678 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 455 flow [2024-06-03 20:52:21,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=455, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-03 20:52:21,679 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-03 20:52:21,679 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 455 flow [2024-06-03 20:52:21,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:21,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:21,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:52:21,680 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:21,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:21,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1343067912, now seen corresponding path program 1 times [2024-06-03 20:52:21,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:21,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304640487] [2024-06-03 20:52:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:22,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:22,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304640487] [2024-06-03 20:52:22,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304640487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:22,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:22,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:52:22,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36711451] [2024-06-03 20:52:22,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:22,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:52:22,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:52:22,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:52:22,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:22,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:22,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:22,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:22,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:22,957 INFO L124 PetriNetUnfolderBase]: 4317/6351 cut-off events. [2024-06-03 20:52:22,957 INFO L125 PetriNetUnfolderBase]: For 15941/15980 co-relation queries the response was YES. [2024-06-03 20:52:22,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 6351 events. 4317/6351 cut-off events. For 15941/15980 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36181 event pairs, 2074 based on Foata normal form. 19/6357 useless extension candidates. Maximal degree in co-relation 21995. Up to 5913 conditions per place. [2024-06-03 20:52:22,997 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 79 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-03 20:52:22,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 732 flow [2024-06-03 20:52:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:52:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:52:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-03 20:52:22,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-06-03 20:52:22,999 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 455 flow. Second operand 5 states and 161 transitions. [2024-06-03 20:52:22,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 732 flow [2024-06-03 20:52:23,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 690 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:23,008 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 479 flow [2024-06-03 20:52:23,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-03 20:52:23,009 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-03 20:52:23,009 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 479 flow [2024-06-03 20:52:23,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:23,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:23,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:23,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:52:23,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:23,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 152893862, now seen corresponding path program 1 times [2024-06-03 20:52:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467109596] [2024-06-03 20:52:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:23,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:23,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467109596] [2024-06-03 20:52:23,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467109596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:23,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:23,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125823209] [2024-06-03 20:52:23,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:23,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:23,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:23,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:23,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:23,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:23,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:23,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:24,415 INFO L124 PetriNetUnfolderBase]: 5487/8006 cut-off events. [2024-06-03 20:52:24,415 INFO L125 PetriNetUnfolderBase]: For 24508/24685 co-relation queries the response was YES. [2024-06-03 20:52:24,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28818 conditions, 8006 events. 5487/8006 cut-off events. For 24508/24685 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45276 event pairs, 2358 based on Foata normal form. 40/8021 useless extension candidates. Maximal degree in co-relation 28789. Up to 7366 conditions per place. [2024-06-03 20:52:24,454 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 98 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-06-03 20:52:24,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 134 transitions, 999 flow [2024-06-03 20:52:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:52:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:52:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-03 20:52:24,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-03 20:52:24,455 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 479 flow. Second operand 6 states and 195 transitions. [2024-06-03 20:52:24,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 134 transitions, 999 flow [2024-06-03 20:52:24,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 134 transitions, 959 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:24,468 INFO L231 Difference]: Finished difference. Result has 79 places, 94 transitions, 667 flow [2024-06-03 20:52:24,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=667, PETRI_PLACES=79, PETRI_TRANSITIONS=94} [2024-06-03 20:52:24,469 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-03 20:52:24,469 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 94 transitions, 667 flow [2024-06-03 20:52:24,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:24,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:24,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:24,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:52:24,470 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:24,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:24,470 INFO L85 PathProgramCache]: Analyzing trace with hash -517664846, now seen corresponding path program 2 times [2024-06-03 20:52:24,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:24,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243138374] [2024-06-03 20:52:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:24,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:24,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:24,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243138374] [2024-06-03 20:52:24,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243138374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:24,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:24,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677991025] [2024-06-03 20:52:24,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:24,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:24,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:24,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:24,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:25,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:25,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 667 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:25,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:25,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:25,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:25,863 INFO L124 PetriNetUnfolderBase]: 5509/8052 cut-off events. [2024-06-03 20:52:25,864 INFO L125 PetriNetUnfolderBase]: For 32038/32364 co-relation queries the response was YES. [2024-06-03 20:52:25,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31089 conditions, 8052 events. 5509/8052 cut-off events. For 32038/32364 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 45539 event pairs, 2336 based on Foata normal form. 81/8115 useless extension candidates. Maximal degree in co-relation 31057. Up to 7419 conditions per place. [2024-06-03 20:52:25,916 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 112 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-03 20:52:25,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 147 transitions, 1168 flow [2024-06-03 20:52:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-03 20:52:25,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-03 20:52:25,918 INFO L175 Difference]: Start difference. First operand has 79 places, 94 transitions, 667 flow. Second operand 7 states and 222 transitions. [2024-06-03 20:52:25,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 147 transitions, 1168 flow [2024-06-03 20:52:25,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 147 transitions, 1114 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 20:52:25,947 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 743 flow [2024-06-03 20:52:25,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=743, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-03 20:52:25,948 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-03 20:52:25,948 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 743 flow [2024-06-03 20:52:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:25,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:25,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:25,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:52:25,948 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:25,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash -517670426, now seen corresponding path program 3 times [2024-06-03 20:52:25,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:25,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575688086] [2024-06-03 20:52:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:26,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:26,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575688086] [2024-06-03 20:52:26,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575688086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:26,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:26,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:26,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065053943] [2024-06-03 20:52:26,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:26,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:26,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:26,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:26,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 743 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:26,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:26,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:26,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:27,426 INFO L124 PetriNetUnfolderBase]: 5500/8032 cut-off events. [2024-06-03 20:52:27,426 INFO L125 PetriNetUnfolderBase]: For 36452/36703 co-relation queries the response was YES. [2024-06-03 20:52:27,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31394 conditions, 8032 events. 5500/8032 cut-off events. For 36452/36703 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45396 event pairs, 2358 based on Foata normal form. 65/8072 useless extension candidates. Maximal degree in co-relation 31360. Up to 7410 conditions per place. [2024-06-03 20:52:27,472 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 95 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-03 20:52:27,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 1060 flow [2024-06-03 20:52:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:52:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:52:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-03 20:52:27,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-03 20:52:27,473 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 743 flow. Second operand 5 states and 164 transitions. [2024-06-03 20:52:27,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 1060 flow [2024-06-03 20:52:27,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 968 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:27,513 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 712 flow [2024-06-03 20:52:27,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=712, PETRI_PLACES=86, PETRI_TRANSITIONS=100} [2024-06-03 20:52:27,513 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-03 20:52:27,514 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 712 flow [2024-06-03 20:52:27,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:27,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:27,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:27,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:52:27,514 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:27,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:27,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1709679874, now seen corresponding path program 1 times [2024-06-03 20:52:27,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:27,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777589191] [2024-06-03 20:52:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:27,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:28,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:28,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777589191] [2024-06-03 20:52:28,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777589191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:28,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:28,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:52:28,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855913581] [2024-06-03 20:52:28,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:28,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:52:28,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:28,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:52:28,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:52:28,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:28,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 100 transitions, 712 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:28,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:28,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:28,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:28,832 INFO L124 PetriNetUnfolderBase]: 4998/7360 cut-off events. [2024-06-03 20:52:28,832 INFO L125 PetriNetUnfolderBase]: For 40838/40861 co-relation queries the response was YES. [2024-06-03 20:52:28,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29609 conditions, 7360 events. 4998/7360 cut-off events. For 40838/40861 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42865 event pairs, 2477 based on Foata normal form. 27/7358 useless extension candidates. Maximal degree in co-relation 29574. Up to 6752 conditions per place. [2024-06-03 20:52:28,869 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 100 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2024-06-03 20:52:28,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 128 transitions, 1088 flow [2024-06-03 20:52:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:52:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:52:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-03 20:52:28,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-03 20:52:28,870 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 712 flow. Second operand 4 states and 128 transitions. [2024-06-03 20:52:28,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 128 transitions, 1088 flow [2024-06-03 20:52:28,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 1032 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:28,897 INFO L231 Difference]: Finished difference. Result has 87 places, 113 transitions, 835 flow [2024-06-03 20:52:28,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=835, PETRI_PLACES=87, PETRI_TRANSITIONS=113} [2024-06-03 20:52:28,898 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-03 20:52:28,898 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 113 transitions, 835 flow [2024-06-03 20:52:28,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:28,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:28,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:28,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:52:28,899 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:28,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 441882047, now seen corresponding path program 1 times [2024-06-03 20:52:28,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:28,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307555191] [2024-06-03 20:52:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:28,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:29,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:29,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307555191] [2024-06-03 20:52:29,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307555191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:29,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:29,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:29,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472817819] [2024-06-03 20:52:29,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:29,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:29,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:29,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:29,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:29,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:29,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 113 transitions, 835 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:29,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:29,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:29,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:30,437 INFO L124 PetriNetUnfolderBase]: 6100/8926 cut-off events. [2024-06-03 20:52:30,437 INFO L125 PetriNetUnfolderBase]: For 65148/65365 co-relation queries the response was YES. [2024-06-03 20:52:30,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39636 conditions, 8926 events. 6100/8926 cut-off events. For 65148/65365 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52025 event pairs, 1808 based on Foata normal form. 62/8736 useless extension candidates. Maximal degree in co-relation 39599. Up to 7913 conditions per place. [2024-06-03 20:52:30,485 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 49 changer transitions 0/159 dead transitions. [2024-06-03 20:52:30,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1345 flow [2024-06-03 20:52:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:52:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:52:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-03 20:52:30,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-03 20:52:30,487 INFO L175 Difference]: Start difference. First operand has 87 places, 113 transitions, 835 flow. Second operand 6 states and 199 transitions. [2024-06-03 20:52:30,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1345 flow [2024-06-03 20:52:30,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 159 transitions, 1335 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-03 20:52:30,545 INFO L231 Difference]: Finished difference. Result has 93 places, 119 transitions, 1007 flow [2024-06-03 20:52:30,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1007, PETRI_PLACES=93, PETRI_TRANSITIONS=119} [2024-06-03 20:52:30,546 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-03 20:52:30,546 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 119 transitions, 1007 flow [2024-06-03 20:52:30,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:30,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:30,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:30,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:52:30,546 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:30,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1059941569, now seen corresponding path program 2 times [2024-06-03 20:52:30,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:30,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085992039] [2024-06-03 20:52:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:30,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:31,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:31,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085992039] [2024-06-03 20:52:31,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085992039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:31,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:31,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:31,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113960815] [2024-06-03 20:52:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:31,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:31,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:31,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:31,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 119 transitions, 1007 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:31,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:31,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:31,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:32,152 INFO L124 PetriNetUnfolderBase]: 6152/8994 cut-off events. [2024-06-03 20:52:32,153 INFO L125 PetriNetUnfolderBase]: For 82571/82865 co-relation queries the response was YES. [2024-06-03 20:52:32,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42498 conditions, 8994 events. 6152/8994 cut-off events. For 82571/82865 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 52385 event pairs, 2212 based on Foata normal form. 75/8805 useless extension candidates. Maximal degree in co-relation 42458. Up to 8117 conditions per place. [2024-06-03 20:52:32,218 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 93 selfloop transitions, 45 changer transitions 0/158 dead transitions. [2024-06-03 20:52:32,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 158 transitions, 1415 flow [2024-06-03 20:52:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:52:32,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:52:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-03 20:52:32,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-03 20:52:32,220 INFO L175 Difference]: Start difference. First operand has 93 places, 119 transitions, 1007 flow. Second operand 6 states and 195 transitions. [2024-06-03 20:52:32,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 158 transitions, 1415 flow [2024-06-03 20:52:32,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 158 transitions, 1331 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-03 20:52:32,302 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 1070 flow [2024-06-03 20:52:32,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1070, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-03 20:52:32,303 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-03 20:52:32,303 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 1070 flow [2024-06-03 20:52:32,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:32,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:32,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:32,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:52:32,303 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:32,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082559, now seen corresponding path program 3 times [2024-06-03 20:52:32,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:32,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667003275] [2024-06-03 20:52:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:32,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:32,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667003275] [2024-06-03 20:52:32,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667003275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:32,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:32,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513710376] [2024-06-03 20:52:32,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:32,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:32,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:32,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:32,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 1070 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:32,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:32,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:32,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:33,808 INFO L124 PetriNetUnfolderBase]: 6120/8959 cut-off events. [2024-06-03 20:52:33,808 INFO L125 PetriNetUnfolderBase]: For 90292/90580 co-relation queries the response was YES. [2024-06-03 20:52:33,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42932 conditions, 8959 events. 6120/8959 cut-off events. For 90292/90580 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52219 event pairs, 1798 based on Foata normal form. 106/8808 useless extension candidates. Maximal degree in co-relation 42890. Up to 8047 conditions per place. [2024-06-03 20:52:33,869 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 41 changer transitions 0/151 dead transitions. [2024-06-03 20:52:33,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1406 flow [2024-06-03 20:52:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:52:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:52:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-03 20:52:33,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423076923076924 [2024-06-03 20:52:33,871 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 1070 flow. Second operand 5 states and 167 transitions. [2024-06-03 20:52:33,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1406 flow [2024-06-03 20:52:33,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 151 transitions, 1289 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:33,955 INFO L231 Difference]: Finished difference. Result has 98 places, 122 transitions, 1051 flow [2024-06-03 20:52:33,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1051, PETRI_PLACES=98, PETRI_TRANSITIONS=122} [2024-06-03 20:52:33,955 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-03 20:52:33,955 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 122 transitions, 1051 flow [2024-06-03 20:52:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:33,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:33,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:33,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:52:33,956 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1412985479, now seen corresponding path program 1 times [2024-06-03 20:52:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863812067] [2024-06-03 20:52:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:34,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:34,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863812067] [2024-06-03 20:52:34,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863812067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:34,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:34,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939462112] [2024-06-03 20:52:34,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:34,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:34,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:34,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:34,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 122 transitions, 1051 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:34,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:34,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:34,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:35,669 INFO L124 PetriNetUnfolderBase]: 6715/9793 cut-off events. [2024-06-03 20:52:35,669 INFO L125 PetriNetUnfolderBase]: For 94509/94826 co-relation queries the response was YES. [2024-06-03 20:52:35,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45993 conditions, 9793 events. 6715/9793 cut-off events. For 94509/94826 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 56812 event pairs, 1908 based on Foata normal form. 117/9859 useless extension candidates. Maximal degree in co-relation 45950. Up to 8482 conditions per place. [2024-06-03 20:52:35,728 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 135 selfloop transitions, 43 changer transitions 0/189 dead transitions. [2024-06-03 20:52:35,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 189 transitions, 1765 flow [2024-06-03 20:52:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-03 20:52:35,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-03 20:52:35,730 INFO L175 Difference]: Start difference. First operand has 98 places, 122 transitions, 1051 flow. Second operand 7 states and 228 transitions. [2024-06-03 20:52:35,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 189 transitions, 1765 flow [2024-06-03 20:52:35,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 189 transitions, 1658 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:35,816 INFO L231 Difference]: Finished difference. Result has 103 places, 133 transitions, 1191 flow [2024-06-03 20:52:35,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=103, PETRI_TRANSITIONS=133} [2024-06-03 20:52:35,817 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-03 20:52:35,817 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 133 transitions, 1191 flow [2024-06-03 20:52:35,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:35,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:35,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:35,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:52:35,817 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:35,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1501551239, now seen corresponding path program 2 times [2024-06-03 20:52:35,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:35,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410468300] [2024-06-03 20:52:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:35,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:36,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410468300] [2024-06-03 20:52:36,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410468300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:36,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:36,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:36,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411420478] [2024-06-03 20:52:36,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:36,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:36,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:36,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:36,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:36,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:36,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 133 transitions, 1191 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:36,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:36,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:36,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:37,670 INFO L124 PetriNetUnfolderBase]: 6989/10199 cut-off events. [2024-06-03 20:52:37,671 INFO L125 PetriNetUnfolderBase]: For 112685/113054 co-relation queries the response was YES. [2024-06-03 20:52:37,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49946 conditions, 10199 events. 6989/10199 cut-off events. For 112685/113054 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59624 event pairs, 2358 based on Foata normal form. 127/10275 useless extension candidates. Maximal degree in co-relation 49900. Up to 9096 conditions per place. [2024-06-03 20:52:37,748 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 141 selfloop transitions, 39 changer transitions 0/191 dead transitions. [2024-06-03 20:52:37,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 191 transitions, 1851 flow [2024-06-03 20:52:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-03 20:52:37,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-03 20:52:37,749 INFO L175 Difference]: Start difference. First operand has 103 places, 133 transitions, 1191 flow. Second operand 7 states and 228 transitions. [2024-06-03 20:52:37,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 191 transitions, 1851 flow [2024-06-03 20:52:37,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 191 transitions, 1792 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 20:52:37,940 INFO L231 Difference]: Finished difference. Result has 109 places, 138 transitions, 1297 flow [2024-06-03 20:52:37,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1297, PETRI_PLACES=109, PETRI_TRANSITIONS=138} [2024-06-03 20:52:37,941 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-03 20:52:37,941 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 138 transitions, 1297 flow [2024-06-03 20:52:37,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:37,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:37,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:37,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:52:37,941 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:37,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1501699109, now seen corresponding path program 3 times [2024-06-03 20:52:37,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:37,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549861933] [2024-06-03 20:52:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:37,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:38,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:38,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549861933] [2024-06-03 20:52:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549861933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:38,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:38,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:38,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914914826] [2024-06-03 20:52:38,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:38,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:38,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:38,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:38,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:38,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 138 transitions, 1297 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:38,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:38,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:38,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:39,764 INFO L124 PetriNetUnfolderBase]: 6935/10121 cut-off events. [2024-06-03 20:52:39,764 INFO L125 PetriNetUnfolderBase]: For 122389/122760 co-relation queries the response was YES. [2024-06-03 20:52:39,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50417 conditions, 10121 events. 6935/10121 cut-off events. For 122389/122760 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59036 event pairs, 2363 based on Foata normal form. 133/10203 useless extension candidates. Maximal degree in co-relation 50368. Up to 9216 conditions per place. [2024-06-03 20:52:39,831 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 139 selfloop transitions, 36 changer transitions 0/186 dead transitions. [2024-06-03 20:52:39,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 186 transitions, 1790 flow [2024-06-03 20:52:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-03 20:52:39,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-03 20:52:39,834 INFO L175 Difference]: Start difference. First operand has 109 places, 138 transitions, 1297 flow. Second operand 7 states and 222 transitions. [2024-06-03 20:52:39,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 186 transitions, 1790 flow [2024-06-03 20:52:39,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 186 transitions, 1721 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:39,993 INFO L231 Difference]: Finished difference. Result has 113 places, 139 transitions, 1324 flow [2024-06-03 20:52:39,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=113, PETRI_TRANSITIONS=139} [2024-06-03 20:52:39,993 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-03 20:52:39,993 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 139 transitions, 1324 flow [2024-06-03 20:52:39,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:39,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:39,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:39,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:52:39,994 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:39,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:39,994 INFO L85 PathProgramCache]: Analyzing trace with hash 740332721, now seen corresponding path program 4 times [2024-06-03 20:52:39,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:39,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979448618] [2024-06-03 20:52:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:39,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:40,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:40,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979448618] [2024-06-03 20:52:40,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979448618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:40,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:40,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:40,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718573194] [2024-06-03 20:52:40,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:40,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:40,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:40,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:40,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:40,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 139 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:40,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:40,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:40,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:41,785 INFO L124 PetriNetUnfolderBase]: 6968/10192 cut-off events. [2024-06-03 20:52:41,785 INFO L125 PetriNetUnfolderBase]: For 131050/131427 co-relation queries the response was YES. [2024-06-03 20:52:41,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51083 conditions, 10192 events. 6968/10192 cut-off events. For 131050/131427 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59535 event pairs, 2343 based on Foata normal form. 142/10293 useless extension candidates. Maximal degree in co-relation 51032. Up to 9310 conditions per place. [2024-06-03 20:52:41,858 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 154 selfloop transitions, 31 changer transitions 0/196 dead transitions. [2024-06-03 20:52:41,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 196 transitions, 1879 flow [2024-06-03 20:52:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 249 transitions. [2024-06-03 20:52:41,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5985576923076923 [2024-06-03 20:52:41,860 INFO L175 Difference]: Start difference. First operand has 113 places, 139 transitions, 1324 flow. Second operand 8 states and 249 transitions. [2024-06-03 20:52:41,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 196 transitions, 1879 flow [2024-06-03 20:52:41,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 196 transitions, 1807 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:41,995 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1362 flow [2024-06-03 20:52:41,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1362, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-06-03 20:52:41,995 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-03 20:52:41,996 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1362 flow [2024-06-03 20:52:41,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:41,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:41,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:41,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:52:41,996 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:41,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash 734970341, now seen corresponding path program 5 times [2024-06-03 20:52:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:41,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969512236] [2024-06-03 20:52:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:42,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:42,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969512236] [2024-06-03 20:52:42,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969512236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:42,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:42,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537926050] [2024-06-03 20:52:42,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:42,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:42,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:42,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:42,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:42,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1362 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:42,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:42,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:42,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:43,798 INFO L124 PetriNetUnfolderBase]: 7114/10416 cut-off events. [2024-06-03 20:52:43,799 INFO L125 PetriNetUnfolderBase]: For 145143/145514 co-relation queries the response was YES. [2024-06-03 20:52:43,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53033 conditions, 10416 events. 7114/10416 cut-off events. For 145143/145514 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61023 event pairs, 2399 based on Foata normal form. 127/10494 useless extension candidates. Maximal degree in co-relation 52981. Up to 9523 conditions per place. [2024-06-03 20:52:43,868 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 143 selfloop transitions, 29 changer transitions 0/183 dead transitions. [2024-06-03 20:52:43,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 183 transitions, 1857 flow [2024-06-03 20:52:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:52:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:52:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-03 20:52:43,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-03 20:52:43,870 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1362 flow. Second operand 6 states and 194 transitions. [2024-06-03 20:52:43,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 183 transitions, 1857 flow [2024-06-03 20:52:44,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 183 transitions, 1785 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:44,030 INFO L231 Difference]: Finished difference. Result has 116 places, 143 transitions, 1400 flow [2024-06-03 20:52:44,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1400, PETRI_PLACES=116, PETRI_TRANSITIONS=143} [2024-06-03 20:52:44,031 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-03 20:52:44,031 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 143 transitions, 1400 flow [2024-06-03 20:52:44,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:44,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:44,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:44,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:52:44,031 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:44,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:44,031 INFO L85 PathProgramCache]: Analyzing trace with hash 734822471, now seen corresponding path program 6 times [2024-06-03 20:52:44,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:44,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885618837] [2024-06-03 20:52:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:44,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:44,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:44,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885618837] [2024-06-03 20:52:44,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885618837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:44,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:44,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912070363] [2024-06-03 20:52:44,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:44,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:44,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:44,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:44,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 143 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:44,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:44,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:44,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:45,907 INFO L124 PetriNetUnfolderBase]: 7075/10355 cut-off events. [2024-06-03 20:52:45,907 INFO L125 PetriNetUnfolderBase]: For 152682/153045 co-relation queries the response was YES. [2024-06-03 20:52:45,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52979 conditions, 10355 events. 7075/10355 cut-off events. For 152682/153045 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60676 event pairs, 1958 based on Foata normal form. 141/10447 useless extension candidates. Maximal degree in co-relation 52926. Up to 9116 conditions per place. [2024-06-03 20:52:45,985 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 140 selfloop transitions, 37 changer transitions 0/188 dead transitions. [2024-06-03 20:52:45,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 188 transitions, 1897 flow [2024-06-03 20:52:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:52:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:52:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-03 20:52:45,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-03 20:52:45,986 INFO L175 Difference]: Start difference. First operand has 116 places, 143 transitions, 1400 flow. Second operand 6 states and 197 transitions. [2024-06-03 20:52:45,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 188 transitions, 1897 flow [2024-06-03 20:52:46,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 188 transitions, 1815 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:46,176 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1438 flow [2024-06-03 20:52:46,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1438, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-06-03 20:52:46,176 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-03 20:52:46,177 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1438 flow [2024-06-03 20:52:46,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:46,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:46,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:52:46,177 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:46,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:46,177 INFO L85 PathProgramCache]: Analyzing trace with hash 740547923, now seen corresponding path program 1 times [2024-06-03 20:52:46,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:46,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976263860] [2024-06-03 20:52:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:46,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:46,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976263860] [2024-06-03 20:52:46,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976263860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:46,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:46,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:46,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168909599] [2024-06-03 20:52:46,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:46,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:46,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:46,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:52:46,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1438 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:46,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:46,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:52:46,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:48,049 INFO L124 PetriNetUnfolderBase]: 6967/10209 cut-off events. [2024-06-03 20:52:48,049 INFO L125 PetriNetUnfolderBase]: For 159572/159923 co-relation queries the response was YES. [2024-06-03 20:52:48,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52530 conditions, 10209 events. 6967/10209 cut-off events. For 159572/159923 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59633 event pairs, 2184 based on Foata normal form. 144/10312 useless extension candidates. Maximal degree in co-relation 52475. Up to 8973 conditions per place. [2024-06-03 20:52:48,140 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 156 selfloop transitions, 38 changer transitions 0/205 dead transitions. [2024-06-03 20:52:48,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 205 transitions, 1979 flow [2024-06-03 20:52:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-03 20:52:48,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-03 20:52:48,155 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1438 flow. Second operand 8 states and 251 transitions. [2024-06-03 20:52:48,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 205 transitions, 1979 flow [2024-06-03 20:52:48,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 205 transitions, 1844 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:48,421 INFO L231 Difference]: Finished difference. Result has 121 places, 146 transitions, 1378 flow [2024-06-03 20:52:48,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1378, PETRI_PLACES=121, PETRI_TRANSITIONS=146} [2024-06-03 20:52:48,422 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-03 20:52:48,422 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 146 transitions, 1378 flow [2024-06-03 20:52:48,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:48,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:48,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:48,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:52:48,423 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:48,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash -904215641, now seen corresponding path program 1 times [2024-06-03 20:52:48,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:48,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471915709] [2024-06-03 20:52:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:49,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:49,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471915709] [2024-06-03 20:52:49,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471915709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:49,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:49,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:52:49,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125248163] [2024-06-03 20:52:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:49,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:52:49,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:52:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:52:49,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:49,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 146 transitions, 1378 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:49,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:49,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:49,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:50,040 INFO L124 PetriNetUnfolderBase]: 5676/8381 cut-off events. [2024-06-03 20:52:50,040 INFO L125 PetriNetUnfolderBase]: For 138754/139003 co-relation queries the response was YES. [2024-06-03 20:52:50,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44545 conditions, 8381 events. 5676/8381 cut-off events. For 138754/139003 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49240 event pairs, 2029 based on Foata normal form. 32/8386 useless extension candidates. Maximal degree in co-relation 44490. Up to 7824 conditions per place. [2024-06-03 20:52:50,113 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 132 selfloop transitions, 33 changer transitions 0/177 dead transitions. [2024-06-03 20:52:50,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 177 transitions, 1950 flow [2024-06-03 20:52:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:52:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:52:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-03 20:52:50,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-03 20:52:50,114 INFO L175 Difference]: Start difference. First operand has 121 places, 146 transitions, 1378 flow. Second operand 5 states and 160 transitions. [2024-06-03 20:52:50,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 177 transitions, 1950 flow [2024-06-03 20:52:50,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 177 transitions, 1861 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:50,260 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1472 flow [2024-06-03 20:52:50,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1472, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2024-06-03 20:52:50,261 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-03 20:52:50,261 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1472 flow [2024-06-03 20:52:50,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:50,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:50,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:50,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:52:50,262 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:50,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:50,262 INFO L85 PathProgramCache]: Analyzing trace with hash -872699801, now seen corresponding path program 2 times [2024-06-03 20:52:50,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:50,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70748686] [2024-06-03 20:52:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:50,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:50,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:50,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70748686] [2024-06-03 20:52:50,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70748686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:50,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:50,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:52:50,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975220422] [2024-06-03 20:52:50,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:50,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:52:50,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:50,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:52:50,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:52:50,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:50,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1472 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:50,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:50,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:50,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:51,905 INFO L124 PetriNetUnfolderBase]: 5669/8372 cut-off events. [2024-06-03 20:52:51,906 INFO L125 PetriNetUnfolderBase]: For 154341/154602 co-relation queries the response was YES. [2024-06-03 20:52:51,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46125 conditions, 8372 events. 5669/8372 cut-off events. For 154341/154602 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49085 event pairs, 2029 based on Foata normal form. 34/8380 useless extension candidates. Maximal degree in co-relation 46069. Up to 7826 conditions per place. [2024-06-03 20:52:51,971 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 130 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-06-03 20:52:51,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1834 flow [2024-06-03 20:52:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:52:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:52:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-03 20:52:51,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-03 20:52:51,972 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1472 flow. Second operand 4 states and 132 transitions. [2024-06-03 20:52:51,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1834 flow [2024-06-03 20:52:52,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1741 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-03 20:52:52,126 INFO L231 Difference]: Finished difference. Result has 123 places, 154 transitions, 1453 flow [2024-06-03 20:52:52,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1453, PETRI_PLACES=123, PETRI_TRANSITIONS=154} [2024-06-03 20:52:52,126 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-03 20:52:52,126 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 154 transitions, 1453 flow [2024-06-03 20:52:52,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:52,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:52,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:52,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:52:52,127 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:52,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1863391521, now seen corresponding path program 1 times [2024-06-03 20:52:52,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:52,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484180841] [2024-06-03 20:52:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:52,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:52,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:52,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484180841] [2024-06-03 20:52:52,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484180841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:52,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:52,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:52:52,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277765990] [2024-06-03 20:52:52,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:52,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:52:52,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:52:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:52:52,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:52:52,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 154 transitions, 1453 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:52,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:52,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:52:52,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:53,787 INFO L124 PetriNetUnfolderBase]: 5840/8644 cut-off events. [2024-06-03 20:52:53,787 INFO L125 PetriNetUnfolderBase]: For 160629/160684 co-relation queries the response was YES. [2024-06-03 20:52:53,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45630 conditions, 8644 events. 5840/8644 cut-off events. For 160629/160684 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 51334 event pairs, 2282 based on Foata normal form. 63/8680 useless extension candidates. Maximal degree in co-relation 45572. Up to 7977 conditions per place. [2024-06-03 20:52:53,845 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 145 selfloop transitions, 17 changer transitions 0/177 dead transitions. [2024-06-03 20:52:53,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 1857 flow [2024-06-03 20:52:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:52:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:52:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-03 20:52:53,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884615384615385 [2024-06-03 20:52:53,846 INFO L175 Difference]: Start difference. First operand has 123 places, 154 transitions, 1453 flow. Second operand 5 states and 153 transitions. [2024-06-03 20:52:53,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 1857 flow [2024-06-03 20:52:53,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1799 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:53,962 INFO L231 Difference]: Finished difference. Result has 125 places, 157 transitions, 1469 flow [2024-06-03 20:52:53,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1469, PETRI_PLACES=125, PETRI_TRANSITIONS=157} [2024-06-03 20:52:53,963 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-03 20:52:53,963 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 157 transitions, 1469 flow [2024-06-03 20:52:53,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:53,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:53,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:53,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:52:53,963 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:53,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:53,963 INFO L85 PathProgramCache]: Analyzing trace with hash 938080417, now seen corresponding path program 1 times [2024-06-03 20:52:53,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:53,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774977912] [2024-06-03 20:52:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:53,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:54,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:54,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774977912] [2024-06-03 20:52:54,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774977912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:54,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:54,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:54,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158815419] [2024-06-03 20:52:54,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:54,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:54,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:54,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:54,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:54,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:52:54,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 157 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:54,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:54,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:52:54,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:55,813 INFO L124 PetriNetUnfolderBase]: 7463/10909 cut-off events. [2024-06-03 20:52:55,813 INFO L125 PetriNetUnfolderBase]: For 207782/207797 co-relation queries the response was YES. [2024-06-03 20:52:55,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57863 conditions, 10909 events. 7463/10909 cut-off events. For 207782/207797 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63540 event pairs, 2649 based on Foata normal form. 10/10913 useless extension candidates. Maximal degree in co-relation 57804. Up to 10181 conditions per place. [2024-06-03 20:52:55,916 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 179 selfloop transitions, 26 changer transitions 0/213 dead transitions. [2024-06-03 20:52:55,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 213 transitions, 2261 flow [2024-06-03 20:52:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:52:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:52:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-03 20:52:55,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-03 20:52:55,917 INFO L175 Difference]: Start difference. First operand has 125 places, 157 transitions, 1469 flow. Second operand 6 states and 181 transitions. [2024-06-03 20:52:55,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 213 transitions, 2261 flow [2024-06-03 20:52:56,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 213 transitions, 2204 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:56,209 INFO L231 Difference]: Finished difference. Result has 131 places, 180 transitions, 1722 flow [2024-06-03 20:52:56,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1722, PETRI_PLACES=131, PETRI_TRANSITIONS=180} [2024-06-03 20:52:56,209 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-03 20:52:56,209 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 180 transitions, 1722 flow [2024-06-03 20:52:56,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:56,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:56,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:56,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:52:56,210 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:56,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:56,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1818957531, now seen corresponding path program 2 times [2024-06-03 20:52:56,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:56,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453012350] [2024-06-03 20:52:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:56,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453012350] [2024-06-03 20:52:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453012350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:56,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:56,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:56,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663090071] [2024-06-03 20:52:56,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:56,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:56,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:56,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:56,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:56,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:52:56,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 180 transitions, 1722 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:56,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:56,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:52:56,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:58,101 INFO L124 PetriNetUnfolderBase]: 7479/10933 cut-off events. [2024-06-03 20:52:58,101 INFO L125 PetriNetUnfolderBase]: For 226146/226150 co-relation queries the response was YES. [2024-06-03 20:52:58,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60286 conditions, 10933 events. 7479/10933 cut-off events. For 226146/226150 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63806 event pairs, 2654 based on Foata normal form. 6/10932 useless extension candidates. Maximal degree in co-relation 60223. Up to 10198 conditions per place. [2024-06-03 20:52:58,196 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 171 selfloop transitions, 30 changer transitions 0/209 dead transitions. [2024-06-03 20:52:58,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2340 flow [2024-06-03 20:52:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:52:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:52:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-03 20:52:58,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807692307692308 [2024-06-03 20:52:58,197 INFO L175 Difference]: Start difference. First operand has 131 places, 180 transitions, 1722 flow. Second operand 5 states and 151 transitions. [2024-06-03 20:52:58,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2340 flow [2024-06-03 20:52:58,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 209 transitions, 2308 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-03 20:52:58,455 INFO L231 Difference]: Finished difference. Result has 137 places, 186 transitions, 1831 flow [2024-06-03 20:52:58,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1831, PETRI_PLACES=137, PETRI_TRANSITIONS=186} [2024-06-03 20:52:58,455 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-03 20:52:58,455 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 186 transitions, 1831 flow [2024-06-03 20:52:58,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:58,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:58,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:58,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:52:58,456 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:52:58,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1818946371, now seen corresponding path program 3 times [2024-06-03 20:52:58,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:58,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703030337] [2024-06-03 20:52:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:58,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:59,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:59,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703030337] [2024-06-03 20:52:59,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703030337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:59,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:59,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:59,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979970527] [2024-06-03 20:52:59,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:59,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:59,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:59,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:52:59,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 186 transitions, 1831 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:59,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:59,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:52:59,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:00,458 INFO L124 PetriNetUnfolderBase]: 7472/10926 cut-off events. [2024-06-03 20:53:00,458 INFO L125 PetriNetUnfolderBase]: For 241088/241114 co-relation queries the response was YES. [2024-06-03 20:53:00,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61040 conditions, 10926 events. 7472/10926 cut-off events. For 241088/241114 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63774 event pairs, 2649 based on Foata normal form. 18/10938 useless extension candidates. Maximal degree in co-relation 60973. Up to 10191 conditions per place. [2024-06-03 20:53:00,552 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 173 selfloop transitions, 31 changer transitions 0/212 dead transitions. [2024-06-03 20:53:00,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 212 transitions, 2309 flow [2024-06-03 20:53:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:53:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:53:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-03 20:53:00,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-03 20:53:00,553 INFO L175 Difference]: Start difference. First operand has 137 places, 186 transitions, 1831 flow. Second operand 5 states and 155 transitions. [2024-06-03 20:53:00,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 212 transitions, 2309 flow [2024-06-03 20:53:00,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 2249 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-03 20:53:00,889 INFO L231 Difference]: Finished difference. Result has 141 places, 186 transitions, 1847 flow [2024-06-03 20:53:00,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1847, PETRI_PLACES=141, PETRI_TRANSITIONS=186} [2024-06-03 20:53:00,890 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-03 20:53:00,890 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 186 transitions, 1847 flow [2024-06-03 20:53:00,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:00,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:00,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:00,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:53:00,890 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:00,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:00,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2145451239, now seen corresponding path program 1 times [2024-06-03 20:53:00,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:00,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56679229] [2024-06-03 20:53:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:00,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56679229] [2024-06-03 20:53:01,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56679229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:01,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:01,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:53:01,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147908845] [2024-06-03 20:53:01,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:01,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:53:01,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:01,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:53:01,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:53:01,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:53:01,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 186 transitions, 1847 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:01,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:01,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:53:01,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:02,624 INFO L124 PetriNetUnfolderBase]: 6148/8991 cut-off events. [2024-06-03 20:53:02,624 INFO L125 PetriNetUnfolderBase]: For 216241/216248 co-relation queries the response was YES. [2024-06-03 20:53:02,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51954 conditions, 8991 events. 6148/8991 cut-off events. For 216241/216248 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52057 event pairs, 2307 based on Foata normal form. 6/8992 useless extension candidates. Maximal degree in co-relation 51885. Up to 8422 conditions per place. [2024-06-03 20:53:02,697 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 190 selfloop transitions, 33 changer transitions 0/232 dead transitions. [2024-06-03 20:53:02,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 232 transitions, 2622 flow [2024-06-03 20:53:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:53:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:53:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-03 20:53:02,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-03 20:53:02,698 INFO L175 Difference]: Start difference. First operand has 141 places, 186 transitions, 1847 flow. Second operand 6 states and 183 transitions. [2024-06-03 20:53:02,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 232 transitions, 2622 flow [2024-06-03 20:53:02,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 232 transitions, 2574 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:53:02,925 INFO L231 Difference]: Finished difference. Result has 146 places, 203 transitions, 2061 flow [2024-06-03 20:53:02,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2061, PETRI_PLACES=146, PETRI_TRANSITIONS=203} [2024-06-03 20:53:02,925 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-03 20:53:02,925 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 203 transitions, 2061 flow [2024-06-03 20:53:02,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:02,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:02,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:02,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:53:02,926 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:02,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1283882509, now seen corresponding path program 2 times [2024-06-03 20:53:02,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:02,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620050476] [2024-06-03 20:53:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:02,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:03,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:03,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620050476] [2024-06-03 20:53:03,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620050476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:03,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:03,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:53:03,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986287599] [2024-06-03 20:53:03,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:03,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:53:03,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:03,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:53:03,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:53:03,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:53:03,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 203 transitions, 2061 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:03,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:03,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:53:03,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:04,873 INFO L124 PetriNetUnfolderBase]: 6164/9018 cut-off events. [2024-06-03 20:53:04,873 INFO L125 PetriNetUnfolderBase]: For 221400/221410 co-relation queries the response was YES. [2024-06-03 20:53:04,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53716 conditions, 9018 events. 6164/9018 cut-off events. For 221400/221410 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52072 event pairs, 2299 based on Foata normal form. 10/9024 useless extension candidates. Maximal degree in co-relation 53645. Up to 8457 conditions per place. [2024-06-03 20:53:04,937 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 199 selfloop transitions, 33 changer transitions 0/241 dead transitions. [2024-06-03 20:53:04,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 241 transitions, 2781 flow [2024-06-03 20:53:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-03 20:53:04,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686813186813187 [2024-06-03 20:53:04,938 INFO L175 Difference]: Start difference. First operand has 146 places, 203 transitions, 2061 flow. Second operand 7 states and 207 transitions. [2024-06-03 20:53:04,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 241 transitions, 2781 flow [2024-06-03 20:53:05,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 241 transitions, 2697 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-03 20:53:05,172 INFO L231 Difference]: Finished difference. Result has 152 places, 209 transitions, 2127 flow [2024-06-03 20:53:05,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2127, PETRI_PLACES=152, PETRI_TRANSITIONS=209} [2024-06-03 20:53:05,173 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-03 20:53:05,173 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 209 transitions, 2127 flow [2024-06-03 20:53:05,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:05,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:05,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:05,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:53:05,173 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:05,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1283888089, now seen corresponding path program 3 times [2024-06-03 20:53:05,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:05,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177353294] [2024-06-03 20:53:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:05,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:05,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:05,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177353294] [2024-06-03 20:53:05,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177353294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:05,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:05,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:53:05,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573600696] [2024-06-03 20:53:05,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:05,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:53:05,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:05,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:53:05,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:53:05,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:53:05,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 209 transitions, 2127 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:05,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:05,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:53:05,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:06,944 INFO L124 PetriNetUnfolderBase]: 6157/9008 cut-off events. [2024-06-03 20:53:06,945 INFO L125 PetriNetUnfolderBase]: For 233096/233106 co-relation queries the response was YES. [2024-06-03 20:53:06,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53818 conditions, 9008 events. 6157/9008 cut-off events. For 233096/233106 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51929 event pairs, 2307 based on Foata normal form. 8/9011 useless extension candidates. Maximal degree in co-relation 53745. Up to 8450 conditions per place. [2024-06-03 20:53:07,037 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 191 selfloop transitions, 31 changer transitions 0/231 dead transitions. [2024-06-03 20:53:07,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 231 transitions, 2631 flow [2024-06-03 20:53:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:53:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:53:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-03 20:53:07,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:53:07,038 INFO L175 Difference]: Start difference. First operand has 152 places, 209 transitions, 2127 flow. Second operand 5 states and 156 transitions. [2024-06-03 20:53:07,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 231 transitions, 2631 flow [2024-06-03 20:53:07,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 231 transitions, 2521 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:07,338 INFO L231 Difference]: Finished difference. Result has 153 places, 209 transitions, 2088 flow [2024-06-03 20:53:07,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2088, PETRI_PLACES=153, PETRI_TRANSITIONS=209} [2024-06-03 20:53:07,338 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-03 20:53:07,339 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 209 transitions, 2088 flow [2024-06-03 20:53:07,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:07,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:07,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:07,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:53:07,339 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:07,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:07,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1298363159, now seen corresponding path program 1 times [2024-06-03 20:53:07,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:07,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974931455] [2024-06-03 20:53:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:07,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:08,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:08,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974931455] [2024-06-03 20:53:08,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974931455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:08,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:08,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:53:08,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662610561] [2024-06-03 20:53:08,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:08,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:53:08,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:08,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:53:08,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:53:08,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:53:08,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 209 transitions, 2088 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:08,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:08,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:53:08,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:09,274 INFO L124 PetriNetUnfolderBase]: 6897/10158 cut-off events. [2024-06-03 20:53:09,274 INFO L125 PetriNetUnfolderBase]: For 318594/318755 co-relation queries the response was YES. [2024-06-03 20:53:09,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62319 conditions, 10158 events. 6897/10158 cut-off events. For 318594/318755 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60394 event pairs, 2392 based on Foata normal form. 45/9978 useless extension candidates. Maximal degree in co-relation 62245. Up to 9062 conditions per place. [2024-06-03 20:53:09,370 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 178 selfloop transitions, 18 changer transitions 0/239 dead transitions. [2024-06-03 20:53:09,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 239 transitions, 2726 flow [2024-06-03 20:53:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:53:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:53:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-03 20:53:09,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-03 20:53:09,371 INFO L175 Difference]: Start difference. First operand has 153 places, 209 transitions, 2088 flow. Second operand 4 states and 123 transitions. [2024-06-03 20:53:09,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 239 transitions, 2726 flow [2024-06-03 20:53:09,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 239 transitions, 2656 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:09,839 INFO L231 Difference]: Finished difference. Result has 154 places, 226 transitions, 2311 flow [2024-06-03 20:53:09,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2311, PETRI_PLACES=154, PETRI_TRANSITIONS=226} [2024-06-03 20:53:09,840 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-03 20:53:09,840 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 226 transitions, 2311 flow [2024-06-03 20:53:09,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:09,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:09,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:09,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:53:09,840 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:09,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2081619046, now seen corresponding path program 1 times [2024-06-03 20:53:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:09,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987077110] [2024-06-03 20:53:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:09,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:10,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:10,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987077110] [2024-06-03 20:53:10,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987077110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:10,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:10,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:53:10,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151482920] [2024-06-03 20:53:10,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:10,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:53:10,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:53:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:53:10,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:53:10,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 226 transitions, 2311 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:10,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:10,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:53:10,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:11,824 INFO L124 PetriNetUnfolderBase]: 6790/10088 cut-off events. [2024-06-03 20:53:11,825 INFO L125 PetriNetUnfolderBase]: For 343893/344483 co-relation queries the response was YES. [2024-06-03 20:53:11,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65929 conditions, 10088 events. 6790/10088 cut-off events. For 343893/344483 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 60426 event pairs, 2033 based on Foata normal form. 73/9793 useless extension candidates. Maximal degree in co-relation 65853. Up to 8986 conditions per place. [2024-06-03 20:53:11,926 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 176 selfloop transitions, 61 changer transitions 0/264 dead transitions. [2024-06-03 20:53:11,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 264 transitions, 3095 flow [2024-06-03 20:53:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:53:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:53:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-03 20:53:11,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-03 20:53:11,928 INFO L175 Difference]: Start difference. First operand has 154 places, 226 transitions, 2311 flow. Second operand 6 states and 190 transitions. [2024-06-03 20:53:11,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 264 transitions, 3095 flow [2024-06-03 20:53:12,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 264 transitions, 3075 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-03 20:53:12,303 INFO L231 Difference]: Finished difference. Result has 160 places, 232 transitions, 2539 flow [2024-06-03 20:53:12,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2539, PETRI_PLACES=160, PETRI_TRANSITIONS=232} [2024-06-03 20:53:12,304 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-03 20:53:12,304 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 232 transitions, 2539 flow [2024-06-03 20:53:12,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:12,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:12,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:12,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:53:12,305 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:12,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:12,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1367779226, now seen corresponding path program 2 times [2024-06-03 20:53:12,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:12,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317746683] [2024-06-03 20:53:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:12,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:12,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:12,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317746683] [2024-06-03 20:53:12,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317746683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:12,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:12,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:53:12,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005884783] [2024-06-03 20:53:12,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:12,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:53:12,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:12,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:53:12,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:53:13,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:53:13,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 232 transitions, 2539 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:13,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:13,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:53:13,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:14,382 INFO L124 PetriNetUnfolderBase]: 6847/10169 cut-off events. [2024-06-03 20:53:14,382 INFO L125 PetriNetUnfolderBase]: For 374226/374912 co-relation queries the response was YES. [2024-06-03 20:53:14,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68566 conditions, 10169 events. 6847/10169 cut-off events. For 374226/374912 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 61055 event pairs, 2199 based on Foata normal form. 58/9859 useless extension candidates. Maximal degree in co-relation 68487. Up to 9207 conditions per place. [2024-06-03 20:53:14,496 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 177 selfloop transitions, 57 changer transitions 0/261 dead transitions. [2024-06-03 20:53:14,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 261 transitions, 3135 flow [2024-06-03 20:53:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:53:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:53:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-03 20:53:14,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-03 20:53:14,497 INFO L175 Difference]: Start difference. First operand has 160 places, 232 transitions, 2539 flow. Second operand 6 states and 184 transitions. [2024-06-03 20:53:14,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 261 transitions, 3135 flow [2024-06-03 20:53:14,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 261 transitions, 2993 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-03 20:53:14,997 INFO L231 Difference]: Finished difference. Result has 164 places, 235 transitions, 2588 flow [2024-06-03 20:53:14,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2588, PETRI_PLACES=164, PETRI_TRANSITIONS=235} [2024-06-03 20:53:14,998 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-03 20:53:14,998 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 235 transitions, 2588 flow [2024-06-03 20:53:14,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:14,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:14,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:14,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:53:14,998 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:14,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1145828058, now seen corresponding path program 3 times [2024-06-03 20:53:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:14,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422148788] [2024-06-03 20:53:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:14,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:15,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:15,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422148788] [2024-06-03 20:53:15,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422148788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:15,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:15,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:53:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522630036] [2024-06-03 20:53:15,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:53:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:53:15,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:53:15,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:53:15,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 235 transitions, 2588 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:15,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:15,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:53:15,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:17,128 INFO L124 PetriNetUnfolderBase]: 6820/10134 cut-off events. [2024-06-03 20:53:17,128 INFO L125 PetriNetUnfolderBase]: For 388095/388757 co-relation queries the response was YES. [2024-06-03 20:53:17,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68388 conditions, 10134 events. 6820/10134 cut-off events. For 388095/388757 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 60750 event pairs, 2023 based on Foata normal form. 86/9854 useless extension candidates. Maximal degree in co-relation 68307. Up to 9124 conditions per place. [2024-06-03 20:53:17,234 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 180 selfloop transitions, 53 changer transitions 0/260 dead transitions. [2024-06-03 20:53:17,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 260 transitions, 3118 flow [2024-06-03 20:53:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:53:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:53:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-03 20:53:17,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-06-03 20:53:17,235 INFO L175 Difference]: Start difference. First operand has 164 places, 235 transitions, 2588 flow. Second operand 5 states and 162 transitions. [2024-06-03 20:53:17,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 260 transitions, 3118 flow [2024-06-03 20:53:17,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 260 transitions, 2957 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:17,750 INFO L231 Difference]: Finished difference. Result has 165 places, 235 transitions, 2547 flow [2024-06-03 20:53:17,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2547, PETRI_PLACES=165, PETRI_TRANSITIONS=235} [2024-06-03 20:53:17,751 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-03 20:53:17,751 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 235 transitions, 2547 flow [2024-06-03 20:53:17,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:17,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:17,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:17,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:53:17,751 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:17,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:17,751 INFO L85 PathProgramCache]: Analyzing trace with hash 374736100, now seen corresponding path program 1 times [2024-06-03 20:53:17,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:17,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433456343] [2024-06-03 20:53:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:17,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:18,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:18,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433456343] [2024-06-03 20:53:18,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433456343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:18,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:18,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:18,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815516885] [2024-06-03 20:53:18,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:18,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:18,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:18,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:18,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:53:18,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 235 transitions, 2547 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:18,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:18,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:53:18,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:20,002 INFO L124 PetriNetUnfolderBase]: 7825/11383 cut-off events. [2024-06-03 20:53:20,002 INFO L125 PetriNetUnfolderBase]: For 374029/374053 co-relation queries the response was YES. [2024-06-03 20:53:20,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71024 conditions, 11383 events. 7825/11383 cut-off events. For 374029/374053 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65909 event pairs, 2105 based on Foata normal form. 28/11406 useless extension candidates. Maximal degree in co-relation 70942. Up to 10367 conditions per place. [2024-06-03 20:53:20,109 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 247 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2024-06-03 20:53:20,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 294 transitions, 3493 flow [2024-06-03 20:53:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-03 20:53:20,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-03 20:53:20,110 INFO L175 Difference]: Start difference. First operand has 165 places, 235 transitions, 2547 flow. Second operand 7 states and 213 transitions. [2024-06-03 20:53:20,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 294 transitions, 3493 flow [2024-06-03 20:53:20,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 294 transitions, 3376 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:20,600 INFO L231 Difference]: Finished difference. Result has 170 places, 245 transitions, 2637 flow [2024-06-03 20:53:20,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2637, PETRI_PLACES=170, PETRI_TRANSITIONS=245} [2024-06-03 20:53:20,600 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-03 20:53:20,600 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 245 transitions, 2637 flow [2024-06-03 20:53:20,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:20,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:20,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:20,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:53:20,601 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:20,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash 640433380, now seen corresponding path program 2 times [2024-06-03 20:53:20,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:20,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717943496] [2024-06-03 20:53:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:21,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:21,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717943496] [2024-06-03 20:53:21,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717943496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:21,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:21,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:21,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455691694] [2024-06-03 20:53:21,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:21,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:21,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:21,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:53:21,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 245 transitions, 2637 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:21,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:21,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:53:21,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:22,976 INFO L124 PetriNetUnfolderBase]: 8065/11719 cut-off events. [2024-06-03 20:53:22,976 INFO L125 PetriNetUnfolderBase]: For 406759/406783 co-relation queries the response was YES. [2024-06-03 20:53:23,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74650 conditions, 11719 events. 8065/11719 cut-off events. For 406759/406783 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 68109 event pairs, 2589 based on Foata normal form. 28/11742 useless extension candidates. Maximal degree in co-relation 74565. Up to 10803 conditions per place. [2024-06-03 20:53:23,084 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 251 selfloop transitions, 36 changer transitions 0/295 dead transitions. [2024-06-03 20:53:23,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 295 transitions, 3546 flow [2024-06-03 20:53:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-03 20:53:23,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-03 20:53:23,085 INFO L175 Difference]: Start difference. First operand has 170 places, 245 transitions, 2637 flow. Second operand 7 states and 210 transitions. [2024-06-03 20:53:23,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 295 transitions, 3546 flow [2024-06-03 20:53:23,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 295 transitions, 3494 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 20:53:23,678 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 2745 flow [2024-06-03 20:53:23,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2745, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-06-03 20:53:23,678 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-03 20:53:23,678 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 2745 flow [2024-06-03 20:53:23,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:23,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:23,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:23,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:53:23,679 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:23,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:23,679 INFO L85 PathProgramCache]: Analyzing trace with hash 640759810, now seen corresponding path program 3 times [2024-06-03 20:53:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:23,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186118640] [2024-06-03 20:53:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:23,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:24,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:24,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186118640] [2024-06-03 20:53:24,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186118640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:24,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:24,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:24,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758114937] [2024-06-03 20:53:24,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:24,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:24,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:24,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:24,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:53:24,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 2745 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:24,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:24,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:53:24,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:26,122 INFO L124 PetriNetUnfolderBase]: 8021/11659 cut-off events. [2024-06-03 20:53:26,122 INFO L125 PetriNetUnfolderBase]: For 421214/421238 co-relation queries the response was YES. [2024-06-03 20:53:26,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74749 conditions, 11659 events. 8021/11659 cut-off events. For 421214/421238 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 67702 event pairs, 2588 based on Foata normal form. 32/11686 useless extension candidates. Maximal degree in co-relation 74661. Up to 10866 conditions per place. [2024-06-03 20:53:26,232 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 250 selfloop transitions, 33 changer transitions 0/291 dead transitions. [2024-06-03 20:53:26,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 291 transitions, 3444 flow [2024-06-03 20:53:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-03 20:53:26,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631868131868132 [2024-06-03 20:53:26,233 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 2745 flow. Second operand 7 states and 205 transitions. [2024-06-03 20:53:26,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 291 transitions, 3444 flow [2024-06-03 20:53:26,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 291 transitions, 3398 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 20:53:26,836 INFO L231 Difference]: Finished difference. Result has 180 places, 252 transitions, 2789 flow [2024-06-03 20:53:26,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2789, PETRI_PLACES=180, PETRI_TRANSITIONS=252} [2024-06-03 20:53:26,837 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-03 20:53:26,837 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 252 transitions, 2789 flow [2024-06-03 20:53:26,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:26,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:26,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:26,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:53:26,837 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:26,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash 463273960, now seen corresponding path program 1 times [2024-06-03 20:53:26,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:26,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860257670] [2024-06-03 20:53:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:26,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:27,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:27,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860257670] [2024-06-03 20:53:27,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860257670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:27,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:27,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:27,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392936765] [2024-06-03 20:53:27,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:27,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:27,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:27,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:27,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:27,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:53:27,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 252 transitions, 2789 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:27,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:27,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:53:27,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:29,202 INFO L124 PetriNetUnfolderBase]: 7665/11275 cut-off events. [2024-06-03 20:53:29,202 INFO L125 PetriNetUnfolderBase]: For 482667/483540 co-relation queries the response was YES. [2024-06-03 20:53:29,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76756 conditions, 11275 events. 7665/11275 cut-off events. For 482667/483540 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 67569 event pairs, 2313 based on Foata normal form. 124/10980 useless extension candidates. Maximal degree in co-relation 76666. Up to 9935 conditions per place. [2024-06-03 20:53:29,313 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 184 selfloop transitions, 93 changer transitions 0/307 dead transitions. [2024-06-03 20:53:29,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 307 transitions, 3929 flow [2024-06-03 20:53:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-03 20:53:29,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2024-06-03 20:53:29,315 INFO L175 Difference]: Start difference. First operand has 180 places, 252 transitions, 2789 flow. Second operand 7 states and 223 transitions. [2024-06-03 20:53:29,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 307 transitions, 3929 flow [2024-06-03 20:53:30,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 307 transitions, 3882 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:30,078 INFO L231 Difference]: Finished difference. Result has 183 places, 264 transitions, 3137 flow [2024-06-03 20:53:30,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3137, PETRI_PLACES=183, PETRI_TRANSITIONS=264} [2024-06-03 20:53:30,078 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 128 predicate places. [2024-06-03 20:53:30,078 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 264 transitions, 3137 flow [2024-06-03 20:53:30,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:30,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:30,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:30,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:53:30,079 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:30,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash 463394116, now seen corresponding path program 1 times [2024-06-03 20:53:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:30,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005611834] [2024-06-03 20:53:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:30,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:30,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005611834] [2024-06-03 20:53:30,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005611834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:30,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:30,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:30,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049493823] [2024-06-03 20:53:30,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:30,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:30,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:30,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:30,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:53:30,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 264 transitions, 3137 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:30,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:30,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:53:30,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:32,437 INFO L124 PetriNetUnfolderBase]: 8133/11896 cut-off events. [2024-06-03 20:53:32,437 INFO L125 PetriNetUnfolderBase]: For 468745/468783 co-relation queries the response was YES. [2024-06-03 20:53:32,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79154 conditions, 11896 events. 8133/11896 cut-off events. For 468745/468783 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70139 event pairs, 2602 based on Foata normal form. 30/11919 useless extension candidates. Maximal degree in co-relation 79063. Up to 10882 conditions per place. [2024-06-03 20:53:32,553 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 263 selfloop transitions, 63 changer transitions 0/334 dead transitions. [2024-06-03 20:53:32,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 334 transitions, 4495 flow [2024-06-03 20:53:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-03 20:53:32,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-06-03 20:53:32,555 INFO L175 Difference]: Start difference. First operand has 183 places, 264 transitions, 3137 flow. Second operand 7 states and 214 transitions. [2024-06-03 20:53:32,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 334 transitions, 4495 flow [2024-06-03 20:53:33,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 334 transitions, 4349 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-03 20:53:33,366 INFO L231 Difference]: Finished difference. Result has 191 places, 289 transitions, 3483 flow [2024-06-03 20:53:33,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3483, PETRI_PLACES=191, PETRI_TRANSITIONS=289} [2024-06-03 20:53:33,366 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-03 20:53:33,366 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 289 transitions, 3483 flow [2024-06-03 20:53:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:33,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:33,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:33,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:53:33,367 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:33,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash 463393930, now seen corresponding path program 2 times [2024-06-03 20:53:33,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:33,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241018087] [2024-06-03 20:53:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:33,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:33,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:33,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241018087] [2024-06-03 20:53:33,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241018087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:33,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:33,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:33,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176711530] [2024-06-03 20:53:33,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:33,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:33,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:33,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:34,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:53:34,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 289 transitions, 3483 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:34,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:34,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:53:34,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:35,985 INFO L124 PetriNetUnfolderBase]: 7756/11420 cut-off events. [2024-06-03 20:53:35,985 INFO L125 PetriNetUnfolderBase]: For 552033/553315 co-relation queries the response was YES. [2024-06-03 20:53:36,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82626 conditions, 11420 events. 7756/11420 cut-off events. For 552033/553315 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 68802 event pairs, 2277 based on Foata normal form. 82/11128 useless extension candidates. Maximal degree in co-relation 82530. Up to 10243 conditions per place. [2024-06-03 20:53:36,109 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 215 selfloop transitions, 83 changer transitions 0/332 dead transitions. [2024-06-03 20:53:36,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 332 transitions, 4262 flow [2024-06-03 20:53:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-03 20:53:36,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-03 20:53:36,110 INFO L175 Difference]: Start difference. First operand has 191 places, 289 transitions, 3483 flow. Second operand 7 states and 213 transitions. [2024-06-03 20:53:36,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 332 transitions, 4262 flow [2024-06-03 20:53:37,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 332 transitions, 4180 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-03 20:53:37,088 INFO L231 Difference]: Finished difference. Result has 197 places, 297 transitions, 3678 flow [2024-06-03 20:53:37,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3678, PETRI_PLACES=197, PETRI_TRANSITIONS=297} [2024-06-03 20:53:37,088 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 142 predicate places. [2024-06-03 20:53:37,088 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 297 transitions, 3678 flow [2024-06-03 20:53:37,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:37,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:37,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:37,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:53:37,089 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:37,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 640525636, now seen corresponding path program 2 times [2024-06-03 20:53:37,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:37,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468246585] [2024-06-03 20:53:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:37,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:37,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468246585] [2024-06-03 20:53:37,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468246585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:37,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:37,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985290115] [2024-06-03 20:53:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:37,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:53:37,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 297 transitions, 3678 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:37,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:37,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:53:37,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:39,506 INFO L124 PetriNetUnfolderBase]: 8257/12073 cut-off events. [2024-06-03 20:53:39,506 INFO L125 PetriNetUnfolderBase]: For 525677/525718 co-relation queries the response was YES. [2024-06-03 20:53:39,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83870 conditions, 12073 events. 8257/12073 cut-off events. For 525677/525718 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 71279 event pairs, 2602 based on Foata normal form. 33/12099 useless extension candidates. Maximal degree in co-relation 83772. Up to 11010 conditions per place. [2024-06-03 20:53:39,630 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 274 selfloop transitions, 77 changer transitions 0/359 dead transitions. [2024-06-03 20:53:39,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 359 transitions, 5206 flow [2024-06-03 20:53:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-03 20:53:39,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-06-03 20:53:39,632 INFO L175 Difference]: Start difference. First operand has 197 places, 297 transitions, 3678 flow. Second operand 7 states and 214 transitions. [2024-06-03 20:53:39,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 359 transitions, 5206 flow [2024-06-03 20:53:40,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 359 transitions, 4990 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:40,648 INFO L231 Difference]: Finished difference. Result has 202 places, 315 transitions, 3900 flow [2024-06-03 20:53:40,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3900, PETRI_PLACES=202, PETRI_TRANSITIONS=315} [2024-06-03 20:53:40,649 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 147 predicate places. [2024-06-03 20:53:40,649 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 315 transitions, 3900 flow [2024-06-03 20:53:40,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:40,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:40,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:40,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:53:40,649 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:40,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:40,650 INFO L85 PathProgramCache]: Analyzing trace with hash 468035560, now seen corresponding path program 3 times [2024-06-03 20:53:40,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:40,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394691652] [2024-06-03 20:53:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:40,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:41,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:41,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394691652] [2024-06-03 20:53:41,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394691652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:41,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:41,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:41,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597237579] [2024-06-03 20:53:41,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:41,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:41,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:41,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:41,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:41,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:53:41,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 315 transitions, 3900 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:41,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:41,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:53:41,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:43,283 INFO L124 PetriNetUnfolderBase]: 7905/11639 cut-off events. [2024-06-03 20:53:43,283 INFO L125 PetriNetUnfolderBase]: For 610095/611371 co-relation queries the response was YES. [2024-06-03 20:53:43,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86054 conditions, 11639 events. 7905/11639 cut-off events. For 610095/611371 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70044 event pairs, 2277 based on Foata normal form. 92/11358 useless extension candidates. Maximal degree in co-relation 85953. Up to 10387 conditions per place. [2024-06-03 20:53:43,401 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 229 selfloop transitions, 107 changer transitions 0/373 dead transitions. [2024-06-03 20:53:43,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 373 transitions, 5094 flow [2024-06-03 20:53:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:53:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:53:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-03 20:53:43,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697115384615384 [2024-06-03 20:53:43,402 INFO L175 Difference]: Start difference. First operand has 202 places, 315 transitions, 3900 flow. Second operand 8 states and 237 transitions. [2024-06-03 20:53:43,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 373 transitions, 5094 flow [2024-06-03 20:53:44,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 373 transitions, 4975 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-03 20:53:44,387 INFO L231 Difference]: Finished difference. Result has 210 places, 335 transitions, 4328 flow [2024-06-03 20:53:44,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4328, PETRI_PLACES=210, PETRI_TRANSITIONS=335} [2024-06-03 20:53:44,387 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 155 predicate places. [2024-06-03 20:53:44,387 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 335 transitions, 4328 flow [2024-06-03 20:53:44,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:44,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:44,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:44,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:53:44,388 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:44,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash 640762786, now seen corresponding path program 3 times [2024-06-03 20:53:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003601975] [2024-06-03 20:53:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:44,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:44,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003601975] [2024-06-03 20:53:44,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003601975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:44,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:44,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:44,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578533584] [2024-06-03 20:53:44,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:44,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:44,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:44,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:45,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:53:45,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 335 transitions, 4328 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:45,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:45,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:53:45,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:47,021 INFO L124 PetriNetUnfolderBase]: 8328/12175 cut-off events. [2024-06-03 20:53:47,021 INFO L125 PetriNetUnfolderBase]: For 577128/577172 co-relation queries the response was YES. [2024-06-03 20:53:47,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86230 conditions, 12175 events. 8328/12175 cut-off events. For 577128/577172 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 71834 event pairs, 2603 based on Foata normal form. 35/12203 useless extension candidates. Maximal degree in co-relation 86126. Up to 11104 conditions per place. [2024-06-03 20:53:47,143 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 290 selfloop transitions, 81 changer transitions 0/379 dead transitions. [2024-06-03 20:53:47,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 379 transitions, 5556 flow [2024-06-03 20:53:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-03 20:53:47,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796703296703297 [2024-06-03 20:53:47,144 INFO L175 Difference]: Start difference. First operand has 210 places, 335 transitions, 4328 flow. Second operand 7 states and 211 transitions. [2024-06-03 20:53:47,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 379 transitions, 5556 flow [2024-06-03 20:53:48,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 379 transitions, 5331 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-03 20:53:48,113 INFO L231 Difference]: Finished difference. Result has 215 places, 338 transitions, 4332 flow [2024-06-03 20:53:48,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4110, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4332, PETRI_PLACES=215, PETRI_TRANSITIONS=338} [2024-06-03 20:53:48,114 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2024-06-03 20:53:48,114 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 338 transitions, 4332 flow [2024-06-03 20:53:48,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:48,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:48,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:48,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:53:48,115 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:48,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:48,115 INFO L85 PathProgramCache]: Analyzing trace with hash -33450150, now seen corresponding path program 4 times [2024-06-03 20:53:48,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:48,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010765545] [2024-06-03 20:53:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:48,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:48,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:48,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010765545] [2024-06-03 20:53:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010765545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:48,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:48,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968669936] [2024-06-03 20:53:48,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:48,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:53:48,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 338 transitions, 4332 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:48,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:48,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:53:48,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:50,772 INFO L124 PetriNetUnfolderBase]: 8426/12315 cut-off events. [2024-06-03 20:53:50,772 INFO L125 PetriNetUnfolderBase]: For 615678/615680 co-relation queries the response was YES. [2024-06-03 20:53:50,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87479 conditions, 12315 events. 8426/12315 cut-off events. For 615678/615680 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 72756 event pairs, 2578 based on Foata normal form. 18/12326 useless extension candidates. Maximal degree in co-relation 87374. Up to 11404 conditions per place. [2024-06-03 20:53:50,901 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 328 selfloop transitions, 33 changer transitions 0/369 dead transitions. [2024-06-03 20:53:50,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 369 transitions, 5177 flow [2024-06-03 20:53:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:53:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:53:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-03 20:53:50,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-03 20:53:50,902 INFO L175 Difference]: Start difference. First operand has 215 places, 338 transitions, 4332 flow. Second operand 6 states and 175 transitions. [2024-06-03 20:53:50,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 369 transitions, 5177 flow [2024-06-03 20:53:51,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 369 transitions, 5040 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:53:51,967 INFO L231 Difference]: Finished difference. Result has 218 places, 340 transitions, 4297 flow [2024-06-03 20:53:51,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4297, PETRI_PLACES=218, PETRI_TRANSITIONS=340} [2024-06-03 20:53:51,967 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 163 predicate places. [2024-06-03 20:53:51,968 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 340 transitions, 4297 flow [2024-06-03 20:53:51,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:51,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:51,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:51,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:53:51,968 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:51,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash -44174910, now seen corresponding path program 5 times [2024-06-03 20:53:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:51,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113551467] [2024-06-03 20:53:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:51,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:52,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:52,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113551467] [2024-06-03 20:53:52,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113551467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:52,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:52,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704430518] [2024-06-03 20:53:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:52,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:52,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:52,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:53:52,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 340 transitions, 4297 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:52,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:52,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:53:52,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:54,656 INFO L124 PetriNetUnfolderBase]: 8485/12413 cut-off events. [2024-06-03 20:53:54,656 INFO L125 PetriNetUnfolderBase]: For 637099/637126 co-relation queries the response was YES. [2024-06-03 20:53:54,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88290 conditions, 12413 events. 8485/12413 cut-off events. For 637099/637126 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73394 event pairs, 2579 based on Foata normal form. 34/12442 useless extension candidates. Maximal degree in co-relation 88184. Up to 11397 conditions per place. [2024-06-03 20:53:54,795 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 334 selfloop transitions, 35 changer transitions 0/377 dead transitions. [2024-06-03 20:53:54,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 377 transitions, 5178 flow [2024-06-03 20:53:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:53:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:53:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-03 20:53:54,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-03 20:53:54,797 INFO L175 Difference]: Start difference. First operand has 218 places, 340 transitions, 4297 flow. Second operand 6 states and 181 transitions. [2024-06-03 20:53:54,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 377 transitions, 5178 flow [2024-06-03 20:53:56,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 377 transitions, 5108 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:56,141 INFO L231 Difference]: Finished difference. Result has 220 places, 342 transitions, 4341 flow [2024-06-03 20:53:56,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4341, PETRI_PLACES=220, PETRI_TRANSITIONS=342} [2024-06-03 20:53:56,143 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 165 predicate places. [2024-06-03 20:53:56,143 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 342 transitions, 4341 flow [2024-06-03 20:53:56,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:56,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:56,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:56,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:53:56,144 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:53:56,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash -44501340, now seen corresponding path program 6 times [2024-06-03 20:53:56,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:56,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796657164] [2024-06-03 20:53:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:56,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:56,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:56,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796657164] [2024-06-03 20:53:56,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796657164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:56,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:56,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503284497] [2024-06-03 20:53:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:56,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:56,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:56,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:53:56,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 342 transitions, 4341 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:56,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:56,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:53:56,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:58,698 INFO L124 PetriNetUnfolderBase]: 8453/12356 cut-off events. [2024-06-03 20:53:58,698 INFO L125 PetriNetUnfolderBase]: For 650045/650072 co-relation queries the response was YES. [2024-06-03 20:53:58,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88271 conditions, 12356 events. 8453/12356 cut-off events. For 650045/650072 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 72906 event pairs, 2071 based on Foata normal form. 30/12381 useless extension candidates. Maximal degree in co-relation 88164. Up to 10953 conditions per place. [2024-06-03 20:53:58,845 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 326 selfloop transitions, 51 changer transitions 0/385 dead transitions. [2024-06-03 20:53:58,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 385 transitions, 5260 flow [2024-06-03 20:53:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:53:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:53:58,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-03 20:53:58,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-03 20:53:58,846 INFO L175 Difference]: Start difference. First operand has 220 places, 342 transitions, 4341 flow. Second operand 6 states and 187 transitions. [2024-06-03 20:53:58,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 385 transitions, 5260 flow [2024-06-03 20:54:00,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 385 transitions, 5199 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:54:00,223 INFO L231 Difference]: Finished difference. Result has 224 places, 344 transitions, 4450 flow [2024-06-03 20:54:00,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4450, PETRI_PLACES=224, PETRI_TRANSITIONS=344} [2024-06-03 20:54:00,223 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 169 predicate places. [2024-06-03 20:54:00,223 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 344 transitions, 4450 flow [2024-06-03 20:54:00,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:00,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:00,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:54:00,224 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:00,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1350040266, now seen corresponding path program 4 times [2024-06-03 20:54:00,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:00,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259555013] [2024-06-03 20:54:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:00,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:00,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259555013] [2024-06-03 20:54:00,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259555013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:00,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:00,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:00,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033780725] [2024-06-03 20:54:00,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:00,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:00,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:00,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:54:00,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 344 transitions, 4450 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:00,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:00,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:54:00,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:02,897 INFO L124 PetriNetUnfolderBase]: 8062/11878 cut-off events. [2024-06-03 20:54:02,897 INFO L125 PetriNetUnfolderBase]: For 739522/740875 co-relation queries the response was YES. [2024-06-03 20:54:02,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90585 conditions, 11878 events. 8062/11878 cut-off events. For 739522/740875 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71723 event pairs, 2287 based on Foata normal form. 140/11645 useless extension candidates. Maximal degree in co-relation 90476. Up to 10490 conditions per place. [2024-06-03 20:54:03,040 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 248 selfloop transitions, 112 changer transitions 0/402 dead transitions. [2024-06-03 20:54:03,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 402 transitions, 5794 flow [2024-06-03 20:54:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-03 20:54:03,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-03 20:54:03,041 INFO L175 Difference]: Start difference. First operand has 224 places, 344 transitions, 4450 flow. Second operand 8 states and 251 transitions. [2024-06-03 20:54:03,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 402 transitions, 5794 flow [2024-06-03 20:54:04,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 402 transitions, 5682 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:04,382 INFO L231 Difference]: Finished difference. Result has 227 places, 352 transitions, 4727 flow [2024-06-03 20:54:04,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4354, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4727, PETRI_PLACES=227, PETRI_TRANSITIONS=352} [2024-06-03 20:54:04,382 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 172 predicate places. [2024-06-03 20:54:04,382 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 352 transitions, 4727 flow [2024-06-03 20:54:04,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:04,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:04,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:04,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:54:04,383 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:04,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -363369228, now seen corresponding path program 5 times [2024-06-03 20:54:04,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:04,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151913342] [2024-06-03 20:54:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:04,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:04,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:04,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151913342] [2024-06-03 20:54:04,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151913342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:04,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:04,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350380992] [2024-06-03 20:54:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:04,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:04,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:05,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:54:05,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 352 transitions, 4727 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:05,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:05,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:54:05,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:07,122 INFO L124 PetriNetUnfolderBase]: 8115/11961 cut-off events. [2024-06-03 20:54:07,122 INFO L125 PetriNetUnfolderBase]: For 717635/719018 co-relation queries the response was YES. [2024-06-03 20:54:07,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90589 conditions, 11961 events. 8115/11961 cut-off events. For 717635/719018 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 72362 event pairs, 2287 based on Foata normal form. 168/11756 useless extension candidates. Maximal degree in co-relation 90481. Up to 10545 conditions per place. [2024-06-03 20:54:07,248 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 247 selfloop transitions, 123 changer transitions 0/412 dead transitions. [2024-06-03 20:54:07,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 412 transitions, 6105 flow [2024-06-03 20:54:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:54:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:54:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2024-06-03 20:54:07,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:54:07,250 INFO L175 Difference]: Start difference. First operand has 227 places, 352 transitions, 4727 flow. Second operand 9 states and 273 transitions. [2024-06-03 20:54:07,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 412 transitions, 6105 flow [2024-06-03 20:54:08,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 412 transitions, 5728 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:08,952 INFO L231 Difference]: Finished difference. Result has 231 places, 360 transitions, 4762 flow [2024-06-03 20:54:08,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4762, PETRI_PLACES=231, PETRI_TRANSITIONS=360} [2024-06-03 20:54:08,953 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-06-03 20:54:08,953 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 360 transitions, 4762 flow [2024-06-03 20:54:08,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:08,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:08,953 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] [2024-06-03 20:54:08,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:54:08,953 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:08,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:08,953 INFO L85 PathProgramCache]: Analyzing trace with hash -369030138, now seen corresponding path program 6 times [2024-06-03 20:54:08,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:08,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581169271] [2024-06-03 20:54:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:08,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:09,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:09,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581169271] [2024-06-03 20:54:09,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581169271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:09,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:09,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:09,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545285025] [2024-06-03 20:54:09,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:09,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:09,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:09,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:09,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:54:09,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 360 transitions, 4762 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:09,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:09,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:54:09,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:11,723 INFO L124 PetriNetUnfolderBase]: 8084/11913 cut-off events. [2024-06-03 20:54:11,723 INFO L125 PetriNetUnfolderBase]: For 738304/739661 co-relation queries the response was YES. [2024-06-03 20:54:11,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90574 conditions, 11913 events. 8084/11913 cut-off events. For 738304/739661 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72008 event pairs, 2317 based on Foata normal form. 146/11665 useless extension candidates. Maximal degree in co-relation 90465. Up to 10506 conditions per place. [2024-06-03 20:54:11,839 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 242 selfloop transitions, 112 changer transitions 0/396 dead transitions. [2024-06-03 20:54:11,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 396 transitions, 5918 flow [2024-06-03 20:54:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:54:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:54:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-03 20:54:11,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-03 20:54:11,840 INFO L175 Difference]: Start difference. First operand has 231 places, 360 transitions, 4762 flow. Second operand 6 states and 194 transitions. [2024-06-03 20:54:11,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 396 transitions, 5918 flow [2024-06-03 20:54:13,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 396 transitions, 5646 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:13,137 INFO L231 Difference]: Finished difference. Result has 232 places, 360 transitions, 4723 flow [2024-06-03 20:54:13,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4490, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4723, PETRI_PLACES=232, PETRI_TRANSITIONS=360} [2024-06-03 20:54:13,138 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2024-06-03 20:54:13,138 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 360 transitions, 4723 flow [2024-06-03 20:54:13,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:13,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:13,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:13,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:54:13,139 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:13,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash -368909982, now seen corresponding path program 4 times [2024-06-03 20:54:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71023478] [2024-06-03 20:54:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:13,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:13,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71023478] [2024-06-03 20:54:13,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71023478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:13,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:13,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:13,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943518776] [2024-06-03 20:54:13,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:13,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:13,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:13,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:54:13,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 360 transitions, 4723 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:13,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:13,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:54:13,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:15,898 INFO L124 PetriNetUnfolderBase]: 8549/12506 cut-off events. [2024-06-03 20:54:15,898 INFO L125 PetriNetUnfolderBase]: For 696335/696379 co-relation queries the response was YES. [2024-06-03 20:54:16,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90578 conditions, 12506 events. 8549/12506 cut-off events. For 696335/696379 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74095 event pairs, 2614 based on Foata normal form. 35/12534 useless extension candidates. Maximal degree in co-relation 90468. Up to 11500 conditions per place. [2024-06-03 20:54:16,061 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 329 selfloop transitions, 57 changer transitions 0/394 dead transitions. [2024-06-03 20:54:16,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 394 transitions, 5780 flow [2024-06-03 20:54:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:54:16,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:54:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-03 20:54:16,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-03 20:54:16,062 INFO L175 Difference]: Start difference. First operand has 232 places, 360 transitions, 4723 flow. Second operand 6 states and 185 transitions. [2024-06-03 20:54:16,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 394 transitions, 5780 flow [2024-06-03 20:54:17,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 394 transitions, 5532 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:17,996 INFO L231 Difference]: Finished difference. Result has 233 places, 360 transitions, 4605 flow [2024-06-03 20:54:17,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4605, PETRI_PLACES=233, PETRI_TRANSITIONS=360} [2024-06-03 20:54:17,997 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 178 predicate places. [2024-06-03 20:54:17,997 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 360 transitions, 4605 flow [2024-06-03 20:54:17,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:17,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:17,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:17,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:54:17,997 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:17,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:17,998 INFO L85 PathProgramCache]: Analyzing trace with hash -368910168, now seen corresponding path program 7 times [2024-06-03 20:54:17,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:17,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232123795] [2024-06-03 20:54:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:17,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:18,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232123795] [2024-06-03 20:54:18,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232123795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:18,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:18,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:18,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008845843] [2024-06-03 20:54:18,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:18,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:18,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:18,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:18,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:18,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:54:18,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 360 transitions, 4605 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:18,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:18,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:54:18,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:20,892 INFO L124 PetriNetUnfolderBase]: 8073/11906 cut-off events. [2024-06-03 20:54:20,892 INFO L125 PetriNetUnfolderBase]: For 789212/790545 co-relation queries the response was YES. [2024-06-03 20:54:20,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91109 conditions, 11906 events. 8073/11906 cut-off events. For 789212/790545 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72017 event pairs, 2285 based on Foata normal form. 82/11615 useless extension candidates. Maximal degree in co-relation 90998. Up to 10692 conditions per place. [2024-06-03 20:54:21,022 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 269 selfloop transitions, 77 changer transitions 0/388 dead transitions. [2024-06-03 20:54:21,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 388 transitions, 5369 flow [2024-06-03 20:54:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:54:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:54:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-03 20:54:21,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-03 20:54:21,023 INFO L175 Difference]: Start difference. First operand has 233 places, 360 transitions, 4605 flow. Second operand 6 states and 185 transitions. [2024-06-03 20:54:21,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 388 transitions, 5369 flow [2024-06-03 20:54:22,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 388 transitions, 5195 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:22,698 INFO L231 Difference]: Finished difference. Result has 234 places, 360 transitions, 4595 flow [2024-06-03 20:54:22,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4595, PETRI_PLACES=234, PETRI_TRANSITIONS=360} [2024-06-03 20:54:22,698 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 179 predicate places. [2024-06-03 20:54:22,698 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 360 transitions, 4595 flow [2024-06-03 20:54:22,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:22,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:22,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:22,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:54:22,699 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:22,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:22,699 INFO L85 PathProgramCache]: Analyzing trace with hash 613627578, now seen corresponding path program 5 times [2024-06-03 20:54:22,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:22,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200069663] [2024-06-03 20:54:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:22,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:23,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:23,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200069663] [2024-06-03 20:54:23,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200069663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:23,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:23,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:23,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106081062] [2024-06-03 20:54:23,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:23,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:23,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:23,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:23,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:54:23,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 360 transitions, 4595 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:23,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:23,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:54:23,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:25,376 INFO L124 PetriNetUnfolderBase]: 8554/12519 cut-off events. [2024-06-03 20:54:25,376 INFO L125 PetriNetUnfolderBase]: For 746721/746765 co-relation queries the response was YES. [2024-06-03 20:54:25,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91415 conditions, 12519 events. 8554/12519 cut-off events. For 746721/746765 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74262 event pairs, 2597 based on Foata normal form. 37/12550 useless extension candidates. Maximal degree in co-relation 91303. Up to 11503 conditions per place. [2024-06-03 20:54:25,531 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 329 selfloop transitions, 66 changer transitions 0/403 dead transitions. [2024-06-03 20:54:25,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 403 transitions, 5761 flow [2024-06-03 20:54:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-03 20:54:25,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5741758241758241 [2024-06-03 20:54:25,533 INFO L175 Difference]: Start difference. First operand has 234 places, 360 transitions, 4595 flow. Second operand 7 states and 209 transitions. [2024-06-03 20:54:25,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 403 transitions, 5761 flow [2024-06-03 20:54:27,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 403 transitions, 5551 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:27,778 INFO L231 Difference]: Finished difference. Result has 236 places, 366 transitions, 4642 flow [2024-06-03 20:54:27,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4642, PETRI_PLACES=236, PETRI_TRANSITIONS=366} [2024-06-03 20:54:27,779 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-03 20:54:27,779 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 366 transitions, 4642 flow [2024-06-03 20:54:27,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:27,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:27,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:27,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:54:27,780 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:27,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 613621812, now seen corresponding path program 8 times [2024-06-03 20:54:27,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:27,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080726561] [2024-06-03 20:54:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:27,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:28,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:28,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080726561] [2024-06-03 20:54:28,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080726561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:28,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:28,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518688412] [2024-06-03 20:54:28,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:28,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:28,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:28,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:54:28,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 366 transitions, 4642 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:28,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:28,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:54:28,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:30,595 INFO L124 PetriNetUnfolderBase]: 8080/11920 cut-off events. [2024-06-03 20:54:30,595 INFO L125 PetriNetUnfolderBase]: For 845226/846566 co-relation queries the response was YES. [2024-06-03 20:54:30,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92403 conditions, 11920 events. 8080/11920 cut-off events. For 845226/846566 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72098 event pairs, 2285 based on Foata normal form. 128/11675 useless extension candidates. Maximal degree in co-relation 92290. Up to 10567 conditions per place. [2024-06-03 20:54:30,738 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 254 selfloop transitions, 105 changer transitions 0/403 dead transitions. [2024-06-03 20:54:30,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 403 transitions, 5650 flow [2024-06-03 20:54:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:54:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:54:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-03 20:54:30,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-03 20:54:30,739 INFO L175 Difference]: Start difference. First operand has 236 places, 366 transitions, 4642 flow. Second operand 6 states and 196 transitions. [2024-06-03 20:54:30,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 403 transitions, 5650 flow [2024-06-03 20:54:32,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 403 transitions, 5499 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 20:54:32,623 INFO L231 Difference]: Finished difference. Result has 238 places, 366 transitions, 4721 flow [2024-06-03 20:54:32,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4721, PETRI_PLACES=238, PETRI_TRANSITIONS=366} [2024-06-03 20:54:32,624 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2024-06-03 20:54:32,624 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 366 transitions, 4721 flow [2024-06-03 20:54:32,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:32,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:32,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:32,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:54:32,624 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:32,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 613616418, now seen corresponding path program 6 times [2024-06-03 20:54:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494542039] [2024-06-03 20:54:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494542039] [2024-06-03 20:54:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494542039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:33,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130046565] [2024-06-03 20:54:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:33,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:33,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:54:33,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 366 transitions, 4721 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:33,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:33,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:54:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:35,641 INFO L124 PetriNetUnfolderBase]: 8536/12495 cut-off events. [2024-06-03 20:54:35,641 INFO L125 PetriNetUnfolderBase]: For 770675/770719 co-relation queries the response was YES. [2024-06-03 20:54:35,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91819 conditions, 12495 events. 8536/12495 cut-off events. For 770675/770719 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74152 event pairs, 2613 based on Foata normal form. 35/12523 useless extension candidates. Maximal degree in co-relation 91706. Up to 11482 conditions per place. [2024-06-03 20:54:35,772 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 323 selfloop transitions, 62 changer transitions 0/393 dead transitions. [2024-06-03 20:54:35,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 393 transitions, 5568 flow [2024-06-03 20:54:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:54:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:54:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-03 20:54:35,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-06-03 20:54:35,773 INFO L175 Difference]: Start difference. First operand has 238 places, 366 transitions, 4721 flow. Second operand 5 states and 158 transitions. [2024-06-03 20:54:35,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 393 transitions, 5568 flow [2024-06-03 20:54:37,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 393 transitions, 5298 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:54:37,453 INFO L231 Difference]: Finished difference. Result has 236 places, 366 transitions, 4599 flow [2024-06-03 20:54:37,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4599, PETRI_PLACES=236, PETRI_TRANSITIONS=366} [2024-06-03 20:54:37,453 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-03 20:54:37,454 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 366 transitions, 4599 flow [2024-06-03 20:54:37,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:37,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:37,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:54:37,454 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:37,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:37,454 INFO L85 PathProgramCache]: Analyzing trace with hash 613616232, now seen corresponding path program 9 times [2024-06-03 20:54:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935895267] [2024-06-03 20:54:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:38,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:38,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935895267] [2024-06-03 20:54:38,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935895267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:38,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:38,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:38,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532634113] [2024-06-03 20:54:38,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:38,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:38,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:38,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:54:38,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 366 transitions, 4599 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:38,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:38,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:54:38,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:40,334 INFO L124 PetriNetUnfolderBase]: 8062/11897 cut-off events. [2024-06-03 20:54:40,334 INFO L125 PetriNetUnfolderBase]: For 838762/840102 co-relation queries the response was YES. [2024-06-03 20:54:40,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91889 conditions, 11897 events. 8062/11897 cut-off events. For 838762/840102 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 72060 event pairs, 2284 based on Foata normal form. 128/11652 useless extension candidates. Maximal degree in co-relation 91776. Up to 10549 conditions per place. [2024-06-03 20:54:40,482 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 259 selfloop transitions, 105 changer transitions 0/408 dead transitions. [2024-06-03 20:54:40,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 408 transitions, 5437 flow [2024-06-03 20:54:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-03 20:54:40,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-03 20:54:40,483 INFO L175 Difference]: Start difference. First operand has 236 places, 366 transitions, 4599 flow. Second operand 7 states and 222 transitions. [2024-06-03 20:54:40,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 408 transitions, 5437 flow [2024-06-03 20:54:42,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 408 transitions, 5261 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:42,319 INFO L231 Difference]: Finished difference. Result has 237 places, 366 transitions, 4655 flow [2024-06-03 20:54:42,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4655, PETRI_PLACES=237, PETRI_TRANSITIONS=366} [2024-06-03 20:54:42,319 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 182 predicate places. [2024-06-03 20:54:42,319 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 366 transitions, 4655 flow [2024-06-03 20:54:42,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:42,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:42,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:42,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:54:42,320 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:42,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:42,320 INFO L85 PathProgramCache]: Analyzing trace with hash -33447174, now seen corresponding path program 7 times [2024-06-03 20:54:42,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:42,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789530831] [2024-06-03 20:54:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:42,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:42,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:42,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789530831] [2024-06-03 20:54:42,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789530831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:42,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:42,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:42,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495576897] [2024-06-03 20:54:42,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:42,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:42,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:42,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:54:42,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 366 transitions, 4655 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:42,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:42,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:54:42,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:45,053 INFO L124 PetriNetUnfolderBase]: 8541/12505 cut-off events. [2024-06-03 20:54:45,053 INFO L125 PetriNetUnfolderBase]: For 740584/740600 co-relation queries the response was YES. [2024-06-03 20:54:45,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91049 conditions, 12505 events. 8541/12505 cut-off events. For 740584/740600 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 74319 event pairs, 2648 based on Foata normal form. 16/12511 useless extension candidates. Maximal degree in co-relation 90937. Up to 11395 conditions per place. [2024-06-03 20:54:45,187 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 300 selfloop transitions, 91 changer transitions 0/399 dead transitions. [2024-06-03 20:54:45,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 399 transitions, 5771 flow [2024-06-03 20:54:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:54:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:54:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-03 20:54:45,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-03 20:54:45,188 INFO L175 Difference]: Start difference. First operand has 237 places, 366 transitions, 4655 flow. Second operand 6 states and 178 transitions. [2024-06-03 20:54:45,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 399 transitions, 5771 flow [2024-06-03 20:54:46,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 399 transitions, 5533 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:54:46,798 INFO L231 Difference]: Finished difference. Result has 236 places, 372 transitions, 4729 flow [2024-06-03 20:54:46,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4729, PETRI_PLACES=236, PETRI_TRANSITIONS=372} [2024-06-03 20:54:46,798 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-03 20:54:46,798 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 372 transitions, 4729 flow [2024-06-03 20:54:46,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:46,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:46,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:46,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:54:46,799 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:46,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash -44409270, now seen corresponding path program 10 times [2024-06-03 20:54:46,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:46,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562244810] [2024-06-03 20:54:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:46,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:47,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562244810] [2024-06-03 20:54:47,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562244810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:47,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:47,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:47,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343608620] [2024-06-03 20:54:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:47,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:47,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:47,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:54:47,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 372 transitions, 4729 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:47,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:47,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:54:47,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:49,506 INFO L124 PetriNetUnfolderBase]: 8069/11906 cut-off events. [2024-06-03 20:54:49,506 INFO L125 PetriNetUnfolderBase]: For 775650/776985 co-relation queries the response was YES. [2024-06-03 20:54:49,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90808 conditions, 11906 events. 8069/11906 cut-off events. For 775650/776985 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 72145 event pairs, 2283 based on Foata normal form. 151/11684 useless extension candidates. Maximal degree in co-relation 90696. Up to 10457 conditions per place. [2024-06-03 20:54:49,673 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 228 selfloop transitions, 147 changer transitions 0/421 dead transitions. [2024-06-03 20:54:49,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 421 transitions, 5607 flow [2024-06-03 20:54:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-03 20:54:49,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-03 20:54:49,675 INFO L175 Difference]: Start difference. First operand has 236 places, 372 transitions, 4729 flow. Second operand 8 states and 251 transitions. [2024-06-03 20:54:49,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 421 transitions, 5607 flow [2024-06-03 20:54:51,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 421 transitions, 5460 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-03 20:54:51,527 INFO L231 Difference]: Finished difference. Result has 242 places, 372 transitions, 4904 flow [2024-06-03 20:54:51,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4582, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4904, PETRI_PLACES=242, PETRI_TRANSITIONS=372} [2024-06-03 20:54:51,527 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 187 predicate places. [2024-06-03 20:54:51,527 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 372 transitions, 4904 flow [2024-06-03 20:54:51,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:51,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:51,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:51,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:54:51,528 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:51,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:51,528 INFO L85 PathProgramCache]: Analyzing trace with hash -44171934, now seen corresponding path program 8 times [2024-06-03 20:54:51,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:51,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796020481] [2024-06-03 20:54:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:51,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:52,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:52,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796020481] [2024-06-03 20:54:52,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796020481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:52,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:52,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:52,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173788765] [2024-06-03 20:54:52,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:52,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:52,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:52,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:52,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:52,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:54:52,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 372 transitions, 4904 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:52,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:52,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:54:52,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:54,251 INFO L124 PetriNetUnfolderBase]: 8546/12514 cut-off events. [2024-06-03 20:54:54,251 INFO L125 PetriNetUnfolderBase]: For 736831/736875 co-relation queries the response was YES. [2024-06-03 20:54:54,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91320 conditions, 12514 events. 8546/12514 cut-off events. For 736831/736875 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74392 event pairs, 2611 based on Foata normal form. 35/12542 useless extension candidates. Maximal degree in co-relation 91206. Up to 11398 conditions per place. [2024-06-03 20:54:54,406 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 305 selfloop transitions, 96 changer transitions 0/409 dead transitions. [2024-06-03 20:54:54,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 409 transitions, 6033 flow [2024-06-03 20:54:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:54:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:54:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-03 20:54:54,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-03 20:54:54,407 INFO L175 Difference]: Start difference. First operand has 242 places, 372 transitions, 4904 flow. Second operand 6 states and 184 transitions. [2024-06-03 20:54:54,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 409 transitions, 6033 flow [2024-06-03 20:54:56,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 409 transitions, 5709 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:54:56,051 INFO L231 Difference]: Finished difference. Result has 240 places, 376 transitions, 4844 flow [2024-06-03 20:54:56,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4592, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4844, PETRI_PLACES=240, PETRI_TRANSITIONS=376} [2024-06-03 20:54:56,052 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 185 predicate places. [2024-06-03 20:54:56,052 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 376 transitions, 4844 flow [2024-06-03 20:54:56,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:56,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:56,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:56,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:54:56,052 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:54:56,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash -44409084, now seen corresponding path program 9 times [2024-06-03 20:54:56,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:56,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488751422] [2024-06-03 20:54:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:56,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:56,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:56,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488751422] [2024-06-03 20:54:56,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488751422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:56,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:56,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:56,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38381092] [2024-06-03 20:54:56,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:56,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:56,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:56,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:56,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:54:56,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 376 transitions, 4844 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:56,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:56,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:54:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:58,980 INFO L124 PetriNetUnfolderBase]: 8539/12505 cut-off events. [2024-06-03 20:54:58,980 INFO L125 PetriNetUnfolderBase]: For 680143/680187 co-relation queries the response was YES. [2024-06-03 20:54:59,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89829 conditions, 12505 events. 8539/12505 cut-off events. For 680143/680187 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74148 event pairs, 2611 based on Foata normal form. 35/12533 useless extension candidates. Maximal degree in co-relation 89715. Up to 11391 conditions per place. [2024-06-03 20:54:59,111 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 306 selfloop transitions, 96 changer transitions 0/410 dead transitions. [2024-06-03 20:54:59,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 410 transitions, 5743 flow [2024-06-03 20:54:59,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:54:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:54:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-03 20:54:59,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-03 20:54:59,112 INFO L175 Difference]: Start difference. First operand has 240 places, 376 transitions, 4844 flow. Second operand 6 states and 186 transitions. [2024-06-03 20:54:59,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 410 transitions, 5743 flow [2024-06-03 20:55:00,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 410 transitions, 5555 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:55:00,386 INFO L231 Difference]: Finished difference. Result has 242 places, 376 transitions, 4867 flow [2024-06-03 20:55:00,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4867, PETRI_PLACES=242, PETRI_TRANSITIONS=376} [2024-06-03 20:55:00,387 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 187 predicate places. [2024-06-03 20:55:00,387 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 376 transitions, 4867 flow [2024-06-03 20:55:00,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:00,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:00,387 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] [2024-06-03 20:55:00,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:55:00,388 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:00,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash -33050436, now seen corresponding path program 1 times [2024-06-03 20:55:00,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:00,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252015929] [2024-06-03 20:55:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:00,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:00,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:00,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252015929] [2024-06-03 20:55:00,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252015929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:00,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:00,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032531040] [2024-06-03 20:55:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:00,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:00,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:01,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 20:55:01,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 376 transitions, 4867 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:01,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:01,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 20:55:01,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:03,233 INFO L124 PetriNetUnfolderBase]: 8507/12460 cut-off events. [2024-06-03 20:55:03,233 INFO L125 PetriNetUnfolderBase]: For 679201/679203 co-relation queries the response was YES. [2024-06-03 20:55:03,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89094 conditions, 12460 events. 8507/12460 cut-off events. For 679201/679203 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 73771 event pairs, 2505 based on Foata normal form. 14/12467 useless extension candidates. Maximal degree in co-relation 88980. Up to 11216 conditions per place. [2024-06-03 20:55:03,389 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 365 selfloop transitions, 41 changer transitions 0/414 dead transitions. [2024-06-03 20:55:03,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 414 transitions, 5840 flow [2024-06-03 20:55:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:55:03,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:55:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-03 20:55:03,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-03 20:55:03,390 INFO L175 Difference]: Start difference. First operand has 242 places, 376 transitions, 4867 flow. Second operand 6 states and 178 transitions. [2024-06-03 20:55:03,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 414 transitions, 5840 flow [2024-06-03 20:55:04,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 414 transitions, 5642 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:04,840 INFO L231 Difference]: Finished difference. Result has 243 places, 381 transitions, 4822 flow [2024-06-03 20:55:04,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4822, PETRI_PLACES=243, PETRI_TRANSITIONS=381} [2024-06-03 20:55:04,841 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 188 predicate places. [2024-06-03 20:55:04,841 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 381 transitions, 4822 flow [2024-06-03 20:55:04,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:04,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:04,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:55:04,842 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:04,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash 599147114, now seen corresponding path program 1 times [2024-06-03 20:55:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:04,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273290187] [2024-06-03 20:55:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:04,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:05,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:05,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273290187] [2024-06-03 20:55:05,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273290187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:05,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:05,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:05,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490498659] [2024-06-03 20:55:05,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:05,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:05,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:55:05,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 381 transitions, 4822 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:05,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:05,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:55:05,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:07,673 INFO L124 PetriNetUnfolderBase]: 7752/11549 cut-off events. [2024-06-03 20:55:07,673 INFO L125 PetriNetUnfolderBase]: For 693665/693819 co-relation queries the response was YES. [2024-06-03 20:55:07,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86177 conditions, 11549 events. 7752/11549 cut-off events. For 693665/693819 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 70847 event pairs, 2364 based on Foata normal form. 65/11385 useless extension candidates. Maximal degree in co-relation 86063. Up to 10124 conditions per place. [2024-06-03 20:55:07,795 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 296 selfloop transitions, 41 changer transitions 0/396 dead transitions. [2024-06-03 20:55:07,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 396 transitions, 5582 flow [2024-06-03 20:55:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:55:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:55:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-03 20:55:07,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009615384615384 [2024-06-03 20:55:07,797 INFO L175 Difference]: Start difference. First operand has 243 places, 381 transitions, 4822 flow. Second operand 4 states and 125 transitions. [2024-06-03 20:55:07,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 396 transitions, 5582 flow [2024-06-03 20:55:09,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 396 transitions, 5547 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-03 20:55:09,249 INFO L231 Difference]: Finished difference. Result has 246 places, 385 transitions, 4953 flow [2024-06-03 20:55:09,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4787, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4953, PETRI_PLACES=246, PETRI_TRANSITIONS=385} [2024-06-03 20:55:09,249 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 191 predicate places. [2024-06-03 20:55:09,249 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 385 transitions, 4953 flow [2024-06-03 20:55:09,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:09,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:09,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:09,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:55:09,250 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:09,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:09,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1780799916, now seen corresponding path program 2 times [2024-06-03 20:55:09,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:09,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916051321] [2024-06-03 20:55:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:09,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:09,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916051321] [2024-06-03 20:55:09,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916051321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:09,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:09,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:09,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499376499] [2024-06-03 20:55:09,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:09,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:09,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:09,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:10,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:55:10,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 385 transitions, 4953 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:10,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:10,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:55:10,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:11,836 INFO L124 PetriNetUnfolderBase]: 7736/11489 cut-off events. [2024-06-03 20:55:11,837 INFO L125 PetriNetUnfolderBase]: For 717427/717581 co-relation queries the response was YES. [2024-06-03 20:55:11,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87807 conditions, 11489 events. 7736/11489 cut-off events. For 717427/717581 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 70068 event pairs, 2364 based on Foata normal form. 65/11325 useless extension candidates. Maximal degree in co-relation 87690. Up to 10096 conditions per place. [2024-06-03 20:55:11,991 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 297 selfloop transitions, 45 changer transitions 0/401 dead transitions. [2024-06-03 20:55:11,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 401 transitions, 5733 flow [2024-06-03 20:55:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:55:11,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:55:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-03 20:55:11,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-03 20:55:11,992 INFO L175 Difference]: Start difference. First operand has 246 places, 385 transitions, 4953 flow. Second operand 5 states and 148 transitions. [2024-06-03 20:55:11,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 401 transitions, 5733 flow [2024-06-03 20:55:13,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 401 transitions, 5596 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 20:55:13,348 INFO L231 Difference]: Finished difference. Result has 248 places, 389 transitions, 4987 flow [2024-06-03 20:55:13,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4822, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4987, PETRI_PLACES=248, PETRI_TRANSITIONS=389} [2024-06-03 20:55:13,349 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 193 predicate places. [2024-06-03 20:55:13,349 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 389 transitions, 4987 flow [2024-06-03 20:55:13,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:13,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:13,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:13,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:55:13,349 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:13,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash 105682952, now seen corresponding path program 1 times [2024-06-03 20:55:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:13,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948590389] [2024-06-03 20:55:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:13,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:13,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:13,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948590389] [2024-06-03 20:55:13,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948590389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:13,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:13,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142599298] [2024-06-03 20:55:13,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:13,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:13,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:13,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:13,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:14,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:55:14,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 389 transitions, 4987 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:14,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:14,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:55:14,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:16,185 INFO L124 PetriNetUnfolderBase]: 8300/12394 cut-off events. [2024-06-03 20:55:16,185 INFO L125 PetriNetUnfolderBase]: For 714367/714377 co-relation queries the response was YES. [2024-06-03 20:55:16,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92779 conditions, 12394 events. 8300/12394 cut-off events. For 714367/714377 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 75850 event pairs, 2387 based on Foata normal form. 30/12418 useless extension candidates. Maximal degree in co-relation 92661. Up to 10750 conditions per place. [2024-06-03 20:55:16,342 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 385 selfloop transitions, 49 changer transitions 0/445 dead transitions. [2024-06-03 20:55:16,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 445 transitions, 6316 flow [2024-06-03 20:55:16,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:16,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-03 20:55:16,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-03 20:55:16,343 INFO L175 Difference]: Start difference. First operand has 248 places, 389 transitions, 4987 flow. Second operand 7 states and 216 transitions. [2024-06-03 20:55:16,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 445 transitions, 6316 flow [2024-06-03 20:55:17,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 445 transitions, 6183 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 20:55:17,980 INFO L231 Difference]: Finished difference. Result has 254 places, 400 transitions, 5131 flow [2024-06-03 20:55:17,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5131, PETRI_PLACES=254, PETRI_TRANSITIONS=400} [2024-06-03 20:55:17,980 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 199 predicate places. [2024-06-03 20:55:17,980 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 400 transitions, 5131 flow [2024-06-03 20:55:17,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:17,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:17,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:17,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:55:17,981 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:17,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:17,981 INFO L85 PathProgramCache]: Analyzing trace with hash 548518920, now seen corresponding path program 2 times [2024-06-03 20:55:17,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:17,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900302901] [2024-06-03 20:55:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:17,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:18,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900302901] [2024-06-03 20:55:18,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900302901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:18,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:18,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930316196] [2024-06-03 20:55:18,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:18,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:18,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:18,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:55:18,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 400 transitions, 5131 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:18,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:18,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:55:18,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:20,941 INFO L124 PetriNetUnfolderBase]: 8640/12906 cut-off events. [2024-06-03 20:55:20,941 INFO L125 PetriNetUnfolderBase]: For 786550/786560 co-relation queries the response was YES. [2024-06-03 20:55:21,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99014 conditions, 12906 events. 8640/12906 cut-off events. For 786550/786560 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 79669 event pairs, 2631 based on Foata normal form. 30/12930 useless extension candidates. Maximal degree in co-relation 98893. Up to 11484 conditions per place. [2024-06-03 20:55:21,113 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 388 selfloop transitions, 45 changer transitions 0/444 dead transitions. [2024-06-03 20:55:21,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 444 transitions, 6394 flow [2024-06-03 20:55:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:21,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-03 20:55:21,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-03 20:55:21,114 INFO L175 Difference]: Start difference. First operand has 254 places, 400 transitions, 5131 flow. Second operand 7 states and 213 transitions. [2024-06-03 20:55:21,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 444 transitions, 6394 flow [2024-06-03 20:55:22,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 444 transitions, 6307 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-03 20:55:22,940 INFO L231 Difference]: Finished difference. Result has 260 places, 405 transitions, 5243 flow [2024-06-03 20:55:22,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5048, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5243, PETRI_PLACES=260, PETRI_TRANSITIONS=405} [2024-06-03 20:55:22,940 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 205 predicate places. [2024-06-03 20:55:22,940 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 405 transitions, 5243 flow [2024-06-03 20:55:22,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:22,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:22,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:22,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:55:22,941 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:22,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash 548666790, now seen corresponding path program 3 times [2024-06-03 20:55:22,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:22,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103952939] [2024-06-03 20:55:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:23,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:23,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103952939] [2024-06-03 20:55:23,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103952939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:23,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:23,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:23,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207878552] [2024-06-03 20:55:23,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:23,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:23,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:23,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:55:23,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 405 transitions, 5243 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:23,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:23,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:55:23,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:26,244 INFO L124 PetriNetUnfolderBase]: 8568/12802 cut-off events. [2024-06-03 20:55:26,244 INFO L125 PetriNetUnfolderBase]: For 790038/790048 co-relation queries the response was YES. [2024-06-03 20:55:26,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97723 conditions, 12802 events. 8568/12802 cut-off events. For 790038/790048 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 78888 event pairs, 2633 based on Foata normal form. 38/12834 useless extension candidates. Maximal degree in co-relation 97599. Up to 11626 conditions per place. [2024-06-03 20:55:26,397 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 387 selfloop transitions, 42 changer transitions 0/440 dead transitions. [2024-06-03 20:55:26,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 440 transitions, 6225 flow [2024-06-03 20:55:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-03 20:55:26,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:55:26,398 INFO L175 Difference]: Start difference. First operand has 260 places, 405 transitions, 5243 flow. Second operand 7 states and 208 transitions. [2024-06-03 20:55:26,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 440 transitions, 6225 flow [2024-06-03 20:55:28,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 440 transitions, 6136 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 20:55:28,451 INFO L231 Difference]: Finished difference. Result has 264 places, 406 transitions, 5266 flow [2024-06-03 20:55:28,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5158, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5266, PETRI_PLACES=264, PETRI_TRANSITIONS=406} [2024-06-03 20:55:28,452 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 209 predicate places. [2024-06-03 20:55:28,452 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 406 transitions, 5266 flow [2024-06-03 20:55:28,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:28,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:28,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:28,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:55:28,453 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:28,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:28,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1155419214, now seen corresponding path program 4 times [2024-06-03 20:55:28,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:28,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002351166] [2024-06-03 20:55:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:28,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:29,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:29,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002351166] [2024-06-03 20:55:29,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002351166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:29,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:29,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:29,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58453470] [2024-06-03 20:55:29,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:29,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:29,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:29,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:29,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:55:29,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 406 transitions, 5266 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:29,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:29,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:55:29,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:31,768 INFO L124 PetriNetUnfolderBase]: 8725/13041 cut-off events. [2024-06-03 20:55:31,768 INFO L125 PetriNetUnfolderBase]: For 818943/818953 co-relation queries the response was YES. [2024-06-03 20:55:31,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99585 conditions, 13041 events. 8725/13041 cut-off events. For 818943/818953 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 80711 event pairs, 2641 based on Foata normal form. 40/13077 useless extension candidates. Maximal degree in co-relation 99459. Up to 11898 conditions per place. [2024-06-03 20:55:32,033 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 396 selfloop transitions, 39 changer transitions 0/446 dead transitions. [2024-06-03 20:55:32,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 446 transitions, 6296 flow [2024-06-03 20:55:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-03 20:55:32,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-03 20:55:32,035 INFO L175 Difference]: Start difference. First operand has 264 places, 406 transitions, 5266 flow. Second operand 8 states and 232 transitions. [2024-06-03 20:55:32,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 446 transitions, 6296 flow [2024-06-03 20:55:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 446 transitions, 6212 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:55:33,673 INFO L231 Difference]: Finished difference. Result has 267 places, 408 transitions, 5316 flow [2024-06-03 20:55:33,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5182, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5316, PETRI_PLACES=267, PETRI_TRANSITIONS=408} [2024-06-03 20:55:33,673 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 212 predicate places. [2024-06-03 20:55:33,673 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 408 transitions, 5316 flow [2024-06-03 20:55:33,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:33,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:33,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:33,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:55:33,674 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:33,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:33,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1160781594, now seen corresponding path program 5 times [2024-06-03 20:55:33,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:33,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215673413] [2024-06-03 20:55:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:33,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:34,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:34,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215673413] [2024-06-03 20:55:34,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215673413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:34,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:34,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871288552] [2024-06-03 20:55:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:34,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:34,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:34,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:55:34,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 408 transitions, 5316 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:34,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:34,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:55:34,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:37,254 INFO L124 PetriNetUnfolderBase]: 8816/13202 cut-off events. [2024-06-03 20:55:37,260 INFO L125 PetriNetUnfolderBase]: For 843574/843584 co-relation queries the response was YES. [2024-06-03 20:55:37,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100838 conditions, 13202 events. 8816/13202 cut-off events. For 843574/843584 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 82076 event pairs, 2683 based on Foata normal form. 38/13234 useless extension candidates. Maximal degree in co-relation 100711. Up to 12042 conditions per place. [2024-06-03 20:55:37,414 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 394 selfloop transitions, 35 changer transitions 0/440 dead transitions. [2024-06-03 20:55:37,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 440 transitions, 6318 flow [2024-06-03 20:55:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:55:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:55:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-03 20:55:37,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-03 20:55:37,415 INFO L175 Difference]: Start difference. First operand has 267 places, 408 transitions, 5316 flow. Second operand 6 states and 183 transitions. [2024-06-03 20:55:37,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 440 transitions, 6318 flow [2024-06-03 20:55:39,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 440 transitions, 6224 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:39,156 INFO L231 Difference]: Finished difference. Result has 267 places, 410 transitions, 5352 flow [2024-06-03 20:55:39,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5222, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5352, PETRI_PLACES=267, PETRI_TRANSITIONS=410} [2024-06-03 20:55:39,156 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 212 predicate places. [2024-06-03 20:55:39,156 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 410 transitions, 5352 flow [2024-06-03 20:55:39,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:39,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:39,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:39,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:55:39,157 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:39,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:39,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1160929464, now seen corresponding path program 6 times [2024-06-03 20:55:39,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:39,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531429630] [2024-06-03 20:55:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:39,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531429630] [2024-06-03 20:55:39,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531429630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:39,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:39,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:39,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337168697] [2024-06-03 20:55:39,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:39,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:39,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:39,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:39,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:39,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:55:39,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 410 transitions, 5352 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:39,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:39,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:55:39,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:42,466 INFO L124 PetriNetUnfolderBase]: 8764/13126 cut-off events. [2024-06-03 20:55:42,466 INFO L125 PetriNetUnfolderBase]: For 831196/831206 co-relation queries the response was YES. [2024-06-03 20:55:42,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99529 conditions, 13126 events. 8764/13126 cut-off events. For 831196/831206 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 81433 event pairs, 2439 based on Foata normal form. 30/13150 useless extension candidates. Maximal degree in co-relation 99401. Up to 11548 conditions per place. [2024-06-03 20:55:42,620 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 394 selfloop transitions, 43 changer transitions 0/448 dead transitions. [2024-06-03 20:55:42,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 448 transitions, 6370 flow [2024-06-03 20:55:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:55:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:55:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-03 20:55:42,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-03 20:55:42,621 INFO L175 Difference]: Start difference. First operand has 267 places, 410 transitions, 5352 flow. Second operand 6 states and 189 transitions. [2024-06-03 20:55:42,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 448 transitions, 6370 flow [2024-06-03 20:55:44,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 448 transitions, 6262 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 20:55:44,351 INFO L231 Difference]: Finished difference. Result has 270 places, 412 transitions, 5380 flow [2024-06-03 20:55:44,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5380, PETRI_PLACES=270, PETRI_TRANSITIONS=412} [2024-06-03 20:55:44,352 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 215 predicate places. [2024-06-03 20:55:44,352 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 412 transitions, 5380 flow [2024-06-03 20:55:44,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:44,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:44,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:44,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:55:44,352 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:44,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1155204012, now seen corresponding path program 1 times [2024-06-03 20:55:44,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:44,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483806949] [2024-06-03 20:55:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:44,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:45,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:45,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483806949] [2024-06-03 20:55:45,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483806949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:45,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:45,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:45,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646315167] [2024-06-03 20:55:45,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:45,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:45,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:45,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-03 20:55:45,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 412 transitions, 5380 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:45,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:45,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-03 20:55:45,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:47,691 INFO L124 PetriNetUnfolderBase]: 8713/13045 cut-off events. [2024-06-03 20:55:47,691 INFO L125 PetriNetUnfolderBase]: For 825097/825107 co-relation queries the response was YES. [2024-06-03 20:55:47,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98303 conditions, 13045 events. 8713/13045 cut-off events. For 825097/825107 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 80662 event pairs, 2518 based on Foata normal form. 32/13073 useless extension candidates. Maximal degree in co-relation 98173. Up to 11476 conditions per place. [2024-06-03 20:55:47,839 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 396 selfloop transitions, 48 changer transitions 0/455 dead transitions. [2024-06-03 20:55:47,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 455 transitions, 6440 flow [2024-06-03 20:55:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-03 20:55:47,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5649038461538461 [2024-06-03 20:55:47,840 INFO L175 Difference]: Start difference. First operand has 270 places, 412 transitions, 5380 flow. Second operand 8 states and 235 transitions. [2024-06-03 20:55:47,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 455 transitions, 6440 flow [2024-06-03 20:55:49,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 455 transitions, 6287 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:55:49,429 INFO L231 Difference]: Finished difference. Result has 273 places, 414 transitions, 5374 flow [2024-06-03 20:55:49,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5227, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5374, PETRI_PLACES=273, PETRI_TRANSITIONS=414} [2024-06-03 20:55:49,430 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 218 predicate places. [2024-06-03 20:55:49,430 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 414 transitions, 5374 flow [2024-06-03 20:55:49,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:49,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:49,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:49,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:55:49,430 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:49,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:49,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2033060402, now seen corresponding path program 1 times [2024-06-03 20:55:49,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:49,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751640924] [2024-06-03 20:55:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:49,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:50,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:50,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751640924] [2024-06-03 20:55:50,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751640924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:50,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:50,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:50,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106208933] [2024-06-03 20:55:50,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:50,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:50,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:50,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:50,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:50,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:55:50,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 414 transitions, 5374 flow. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:50,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:50,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:55:50,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:52,917 INFO L124 PetriNetUnfolderBase]: 8415/12773 cut-off events. [2024-06-03 20:55:52,917 INFO L125 PetriNetUnfolderBase]: For 826677/826682 co-relation queries the response was YES. [2024-06-03 20:55:53,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96315 conditions, 12773 events. 8415/12773 cut-off events. For 826677/826682 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 80870 event pairs, 2583 based on Foata normal form. 9/12751 useless extension candidates. Maximal degree in co-relation 96185. Up to 11470 conditions per place. [2024-06-03 20:55:53,069 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 353 selfloop transitions, 50 changer transitions 0/441 dead transitions. [2024-06-03 20:55:53,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 441 transitions, 6500 flow [2024-06-03 20:55:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-03 20:55:53,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2024-06-03 20:55:53,069 INFO L175 Difference]: Start difference. First operand has 273 places, 414 transitions, 5374 flow. Second operand 7 states and 197 transitions. [2024-06-03 20:55:53,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 441 transitions, 6500 flow [2024-06-03 20:55:54,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 441 transitions, 6379 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:54,778 INFO L231 Difference]: Finished difference. Result has 274 places, 422 transitions, 5533 flow [2024-06-03 20:55:54,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5253, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5533, PETRI_PLACES=274, PETRI_TRANSITIONS=422} [2024-06-03 20:55:54,778 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 219 predicate places. [2024-06-03 20:55:54,778 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 422 transitions, 5533 flow [2024-06-03 20:55:54,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:54,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:54,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:54,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:55:54,779 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:55:54,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:54,779 INFO L85 PathProgramCache]: Analyzing trace with hash -2032940432, now seen corresponding path program 2 times [2024-06-03 20:55:54,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:54,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131346381] [2024-06-03 20:55:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:54,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:55,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:55,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131346381] [2024-06-03 20:55:55,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131346381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:55,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:55,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:55,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714670207] [2024-06-03 20:55:55,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:55,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:55,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:55,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:55,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-03 20:55:55,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 422 transitions, 5533 flow. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:55,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:55,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-03 20:55:55,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand